Behringer Car Amplifier A500 User Manual

User Manual  
REFERENCE AMPLIFIER A500  
Professional 600-Watt Reference-Class  
Studio Power Amplifier  
behringer.com  
3
REFERENCE AMPLIFIER A500 User Manual  
9. Do not defeat the safety purpose of the polarized  
or grounding-type plug. A polarized plug has two blades  
with one wider than the other. A grounding-type plug  
has two blades and a third grounding prong. The wide  
blade or the third prong are provided for your safety. If the  
provided plug does not fit into your outlet, consult an  
electrician for replacement of the obsolete outlet.  
Limited Warranty  
§ 1 Warranty  
Important Safety  
Instructions  
[1] This limited warranty is valid only if you purchased  
the product from a BEHRINGER authorized dealer in the  
country of purchase. A list of authorized dealers can be  
found on BEHRINGER’s website behringer.com under  
“Where to Buy, or you can contact the BEHRINGER office  
closest to you.  
10. Protect the power cord from being walked on or  
pinched particularly at plugs, convenience receptacles,  
and the point where they exit from the apparatus.  
Terminals marked with this symbol carry  
electrical current of sufficient magnitude to  
constitute risk of electric shock. Use only  
[2] MUSIC Group* warrants the mechanical and  
electronic components of this product to be free of defects  
in material and workmanship if used under normal  
operating conditions for a period of one (1) year from  
the original date of purchase (see the Limited Warranty  
11. Use only attachments/accessories specified by  
the manufacturer.  
high-quality commercially-available speaker cables with  
¼" TS plugs pre-installed. All other installation or  
modification should be performed only by  
qualified personnel.  
12. Use only with the  
cart, stand, tripod, bracket, terms in § 4 below), unless a longer minimum warranty  
or table specified by the period is mandated by applicable local laws. If the product  
manufacturer, or sold with shows any defects within the specified warranty period  
the apparatus. When a cart and that defect is not excluded under § 4, MUSIC Group  
is used, use caution when shall, at its discretion, either replace or repair the product  
moving the cart/apparatus using suitable new or reconditioned product or parts.  
This symbol, wherever it appears, alerts you  
to the presence of uninsulated dangerous  
voltage inside the enclosure - voltage that  
may be sufficient to constitute a risk of shock.  
combination to avoid  
In case MUSIC Group decides to replace the entire product,  
this limited warranty shall apply to the replacement  
product for the remaining initial warranty period, i.e.,  
one (1) year (or otherwise applicable minimum warranty  
period) from the date of purchase of the original product.  
This symbol, wherever it appears, alerts you injury from tip-over.  
to important operating and maintenance  
instructions in the accompanying literature.  
Please read the manual.  
13. Unplug this apparatus during lightning storms or  
when unused for long periods of time.  
14. Refer all servicing to qualified service personnel.  
Servicing is required when the apparatus has been  
damaged in any way, such as power supply cord or plug  
is damaged, liquid has been spilled or objects have fallen  
into the apparatus, the apparatus has been exposed  
to rain or moisture, does not operate normally, or has  
been dropped.  
[3] Upon validation of the warranty claim, the repaired  
or replacement product will be returned to the user freight  
prepaid by MUSIC Group.  
Caution  
To reduce the risk of electric shock, do not  
remove the top cover (or the rear section).  
No user serviceable parts inside. Refer servicing to  
qualified personnel.  
[4] Warranty claims other than those indicated above  
are expressly excluded.  
PLEASE RETAIN YOUR SALES RECEIPT. IT IS YOUR PROOF  
OF PURCHASE COVERING YOUR LIMITED WARRANTY.  
THIS LIMITED WARRANTY IS VOID WITHOUT SUCH PROOF  
OF PURCHASE.  
Caution  
15. The apparatus shall be connected to a MAINS socket  
outlet with a protective earthing connection.  
To reduce the risk of fire or electric shock,  
do not expose this appliance to rain and  
moisture. The apparatus shall not be exposed to dripping  
16. Where the MAINS plug or an appliance coupler is  
or splashing liquids and no objects filled with liquids, such used as the disconnect device, the disconnect device shall  
§ 2 Online registration  
as vases, shall be placed on the apparatus.  
remain readily operable.  
Please do remember to register your new BEHRINGER  
equipment right after your purchase at behringer.com  
under“Support”and kindly read the terms and conditions  
of our limited warranty carefully. Registering your  
purchase and equipment with us helps us process  
your repair claims quicker and more efficiently.  
Thank you for your cooperation!  
Caution  
These service instructions are for use  
by qualified service personnel only.  
To reduce the risk of electric shock do not perform any  
servicing other than that contained in the operation  
instructions. Repairs have to be performed by qualified  
service personnel.  
§ 3 Return materials authorization  
1. Read these instructions.  
2. Keep these instructions.  
3. Heed all warnings.  
[1] To obtain warranty service, please contact the  
retailer from whom the equipment was purchased.  
Should your BEHRINGER dealer not be located in your  
vicinity, you may contact the BEHRINGER distributor for  
your country listed under“Support”at behringer.com.  
If your country is not listed, please check if your problem  
can be dealt with by our“Online Support”which may  
also be found under“Support”at behringer.com.  
Alternatively, please submit an online warranty claim at  
behringer.com BEFORE returning the product. All inquiries  
must be accompanied by a description of the problem  
and the serial number of the product. After verifying  
the product’s warranty eligibility with the original sales  
receipt, MUSIC Group will then issue a Return Materials  
Authorization (“RMA”) number.  
Legal Disclaimer  
Technical specifications and appearance are subject to change without  
notice. The information contained herein is correct at the time of printing.  
All trademarks are the property of their respective owners. MUSIC Group  
accepts no liability for any loss which may be suffered by any person  
who relies either wholly or in part upon any description, photograph or  
statement contained herein. Colors and specifications may vary slightly from  
product. BEHRINGER products are sold through authorized dealers only.  
Distributors and dealers are not agents of MUSIC Group and have absolutely  
no authority to bind MUSIC Group by any express or implied undertaking  
or representation. This manual is copyrighted. No part of this manual may  
be reproduced or transmitted in any form or by any means, electronic or  
mechanical, including photocopying and recording of any kind, for any  
purpose, without the express written permission of Red Chip Company Ltd.  
4. Follow all instructions.  
5. Do not use this apparatus near water.  
6. Clean only with dry cloth.  
7. Do not block any ventilation openings. Install in  
accordance with the manufacturer’s instructions.  
8. Do not install near any heat sources such as  
radiators, heat registers, stoves, or other apparatus  
(including amplifiers) that produce heat.  
ALL RIGHTS RESERVED.  
© 2010 Red Chip Company Ltd.  
Trident Chambers, Wickhams Cay, P.O. Box 146,  
Road Town, Tortola, British Virgin Islands  
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REFERENCE AMPLIFIER A500 User Manual  
[2] Subsequently, the product must be returned in  
its original shipping carton, together with the return  
authorization number to the address indicated by  
MUSIC Group.  
§ 9 Amendment  
[7] Any repair or opening of the unit carried out by  
unauthorized personnel (user included) will void the  
limited warranty.  
Warranty service conditions are subject to change without  
notice. For the latest warranty terms and conditions  
and additional information regarding MUSIC Group’s  
limited warranty, please see complete details online at  
behringer.com.  
[8] If an inspection of the product by MUSIC Group  
shows that the defect in question is not covered by the  
limited warranty, the inspection costs are payable by  
the customer.  
[3] Shipments without freight prepaid will not  
be accepted.  
* MUSIC Group Macao Commercial Offshore Limited of  
Rue de Pequim No. 202-A, Macau Finance Centre 9/J, Macau,  
including all MUSIC Group companies  
§ 4 Warranty Exclusions  
[9] Products which do not meet the terms of this  
limited warranty will be repaired exclusively at the buyer’s  
expense. MUSIC Group or its authorized service center will  
inform the buyer of any such circumstance. If the buyer  
fails to submit a written repair order within 6 weeks after  
notification, MUSIC Group will return the unit C.O.D. with  
a separate invoice for freight and packing. Such costs will  
also be invoiced separately when the buyer has sent in a  
written repair order.  
[1] This limited warranty does not cover consumable  
parts including, but not limited to, fuses and batteries.  
Where applicable, MUSIC Group warrants the valves or  
meters contained in the product to be free from defects in  
material and workmanship for a period of ninety (90) days  
from date of purchase.  
[2] This limited warranty does not cover the product  
if it has been electronically or mechanically modified  
in any way. If the product needs to be modified or  
adapted in order to comply with applicable technical  
or safety standards on a national or local level, in any  
country which is not the country for which the product  
was originally developed and manufactured, this  
modification/adaptation shall not be considered a defect  
in materials or workmanship. This limited warranty does  
not cover any such modification/adaptation, regardless  
of whether it was carried out properly or not. Under the  
terms of this limited warranty, MUSIC Group shall not  
be held responsible for any cost resulting from such a  
modification/adaptation.  
[10] Authorized BEHRINGER dealers do not sell new  
products directly in online auctions. Purchases made  
through an online auction are on a“buyer beware”basis.  
Online auction confirmations or sales receipts are not  
accepted for warranty verification and MUSIC Group will  
not repair or replace any product purchased through an  
online auction.  
§ 5 Warranty transferability  
This limited warranty is extended exclusively to the  
original buyer (customer of authorized retail dealer) and  
is not transferable to anyone who may subsequently  
purchase this product. No other person (retail dealer, etc.)  
shall be entitled to give any warranty promise on behalf  
of MUSIC Group.  
[3] This limited warranty covers only the product  
hardware. It does not cover technical assistance for  
hardware or software usage and it does not cover  
any software products whether or not contained in  
the product. Any such software is provided“AS IS”  
unless expressly provided for in any enclosed software  
limited warranty.  
§ 6 Claim for damage  
Subject only to the operation of mandatory applicable  
local laws, MUSIC Group shall have no liability to the buyer  
under this warranty for any consequential or indirect  
loss or damage of any kind. In no event shall the liability  
of MUSIC Group under this limited warranty exceed the  
invoiced value of the product.  
[4] This limited warranty is invalid if the factory-  
applied serial number has been altered or removed from  
the product.  
[5] Free inspections and maintenance/repair work  
are expressly excluded from this limited warranty, in  
particular, if caused by improper handling of the product  
by the user. This also applies to defects caused by normal  
wear and tear, in particular, of faders, crossfaders,  
potentiometers, keys/buttons, guitar strings, illuminants  
and similar parts.  
§ 7 Limitation of liability  
This limited warranty is the complete and exclusive  
warranty between you and MUSIC Group. It supersedes  
all other written or oral communications related to this  
product. MUSIC Group provides no other warranties for  
this product.  
[6] Damage/defects caused by the following conditions  
are not covered by this limited warranty:  
§ 8 Other warranty rights and  
national law  
improper handling, neglect or failure to operate the  
unit in compliance with the instructions given in  
BEHRINGER user or service manuals;  
[1] This limited warranty does not exclude or limit the  
buyer’s statutory rights as a consumer in any way.  
[2] The limited warranty regulations mentioned herein  
are applicable unless they constitute an infringement of  
applicable mandatory local laws.  
connection or operation of the unit in any way  
that does not comply with the technical or safety  
regulations applicable in the country where the  
product is used;  
[3] This warranty does not detract from the seller’s  
obligations in regard to any lack of conformity of the  
product and any hidden defect.  
damage/defects caused by acts of God/Nature  
(accident, fire, flood, etc) or any other condition that  
is beyond the control of MUSIC Group.  
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REFERENCE AMPLIFIER A500 User Manual  
1. Introduction  
Power is delivered via the cable enclosed with the unit. All required safety  
precautions have been adhered to.  
Balanced inputs and outputs  
Please keep in mind that all your equipment has to be grounded  
at all times. For your own protection, never change or disable the  
grounding on your equipment or on the cables! The unit should  
always be connected to the mains socket outlet with a protective  
earthing connection.  
Your BEHRINGER A500 features electronically servo-balanced inputs  
(exception: RCA connectors [6]and [7]are intended only for unbalanced  
connections). The automatic servo function recognizes when unbalanced  
jacks are connected and internally adjusts the nominal signal level so that no  
difference in the signal level between inputs and outputs exists (6 dB correction).  
This manual first describes the terminology used, so that you fully  
understand the A500 and its functions. Please read the manual  
carefully and keep it for future reference.  
!
Attention!  
High volume levels can damage your hearing and your speakers.  
Please turn down both volume controls to the minimum (all the way  
to the left) before you power up the amp. Always make sure you use  
appropriate volume levels.  
1.1 Before you get started  
1.1.1 Shipment  
Your A500 was carefully packed at the factory, and the packaging was designed  
to protect the unit from rough handling. Nevertheless, we recommend that  
you carefully examine the packaging and its contents for any signs of physical  
damage that may have occurred during transit.  
1.1.3 Online registration  
Please register your new BEHRINGER equipment right after your purchase  
warranty carefully.  
If the unit is damaged, please do NOT return it to BEHRINGER.  
Instead, notify your dealer and the shipping company immediately.  
Otherwise, claims for damage or replacement may not be honored.  
Should your BEHRINGER product malfunction, it is our intention to have it  
repaired as quickly as possible. To arrange for warranty service, please contact  
the BEHRINGER retailer from whom the equipment was purchased. Should your  
BEHRINGER dealer not be located in your vicinity, you may directly contact  
one of our subsidiaries. Corresponding contact information is included in the  
original equipment packaging (Global Contact Information/European Contact  
Information). Should your country not be listed, please contact the distributor  
nearest you. A list of distributors can be found in the support area of our  
website (http://behringer.com).  
Always use the original packaging to prevent damage during storage  
or transport.  
Make sure that no children are left unsupervised with the A500 or  
its packaging.  
Please ensure proper disposal of all packing materials.  
1.1.2 Initial operation  
Registering your purchase and equipment with us helps us process your repair  
claims more quickly and efficiently.  
Make sure there is enough space around the unit for cooling. To avoid  
overheating, please do not place your amplifier near radiators and other  
equipment emitting heat.  
Thank you for your cooperation!  
Before plugging the unit into a power socket, please make sure you  
have selected the correct voltage!  
The fuse compartment near the power plug socket contains three triangular  
markings. Two of these triangles are opposite one another. The voltage  
indicated adjacent to these markings is the voltage to which your unit  
has been set up, and can be altered by rotating the fuse compartment by  
180°. ATTENTION: This does not apply to export models that were  
manufactured only for use with 120 V, for example!  
If you alter the unit’s voltage, you must change the fuse accordingly.  
The correct value of the fuse needed can be found in the  
chapter “SPECIFICATIONS.”  
Faulty fuses must be replaced with fuses of appropriate rating  
only! The correct value of the fuses needed can be found in the  
chapter “SPECIFICATIONS.”  
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REFERENCE AMPLIFIER A500 User Manual  
2. Control Elements  
2.1 The front  
2
3
4
5
1
Fig. 2.1: Control elements in the front  
[1] The POWER switch is used to power up the A500. The POWER switch should [3] The PROT LED lights up whenever the protective circuitry mutes the speaker  
always be in its “Off” position when you connect the unit to the mains.  
output. Please turn your A500 off immediately whenever this LED is lit.  
POWER LED lights up as soon as you power up the A500.  
The protective circuitry is activated if the amp gets too hot. Let your  
A500 cool down a little before you turn it on again. Besides, check if the  
heat sink has enough space around it to perform its job.  
Please note: Merely switching the unit off does not mean that it  
is fully disconnected from the mains. When not using the unit for  
prolonged periods of time, please unplug the unit’s power cord from  
the power outlet.  
[4] The high-precision power indicator gives out current signal strength.  
[5] The ClIP LED lights up when the signal is distorted. Should distortion occur,  
Your power amp should always be the last device you power up, since  
some equipment in the signal path creates strong impulses which  
are then amplified in the amp and are passed onto the loudspeakers,  
possibly damaging them. Consequently, always let your power amp be  
the first device you power down.  
reduce the input level, so that the CLIP LED no longer lights up.  
If the CLIP LED remains being lit, check the cable connection to the  
speakers because there might be a short on the speaker output.  
[2] Each channel features a volume control. Use it to adjust gain on your A500.  
Both volume controls should be turned all the way to the left whenever  
you power the unit up or down. If an active signal is present on the input,  
turning the volume down will protect your speakers and your ears from  
unwanted “pops” or transients.  
2.2 The back  
7
9
10  
11 12  
6
8
13  
Fig. 2.2: Control elements and connections in the back  
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REFERENCE AMPLIFIER A500 User Manual  
[6] CHANNEl INPUT 1 (MONO). Connect the signal source whose output needs 3. Application Examples  
to be amplified.  
3.1 Stereo mode  
Please use only one of the three input connectors per channel at any  
one time!  
In this mode, both channels run independently with a separate input signal.  
Connect passive loudspeakers, preferably high-quality studio monitors, such  
as the BEHRINGER TRUTH B2031P. Set the STEREO/BRIDGED MONO switch [8]to  
“STEREO” to enable stereo mode.  
Here you will connect an output of your mixing console, your HiFi preamp or  
another signal source.  
Our rack mixing console EURORACK PRO RX1602, with its eight mono-usable  
balanced stereo channels, is an ideal choice for signal processing and  
source selection.  
Please use the POWER switch to power down your A500 before making  
any changes to the operating mode settings.  
Keep in mind the minimum load impedance of 4 Ohms per channel in  
stereo mode.  
The connections for both channels are laid out as RCA, XLR and ¼" TRS stereo  
connectors. The cinch inputs are intended for use with outputs laid out as  
unbalanced signals with a -10 dBV line signal level. Because these inputs  
are more sensitive than others, you can directly connect a CD player or a  
DAT recorder. Of course this input can also be used for connecting mixing  
consoles and similar equipment.  
XENYX 2222FX  
The XLR and ¼" TRS stereo connectors are laid out balanced, but they too can  
of course be used to connect unbalanced signals. Their sensitivity is +4 dBu  
(also see ch. 4).  
R
Ctrl. Room out  
L
Generally speaking, you should choose balanced over unbalanced signals in  
order to guarantee the highest noise protection.  
Due to safety considerations, the inputs can not be used in parallel.  
However, if you are using cinch and XLR or ¼" TRS connectors  
simultaneously, the cinch input is given preference, and the other signal  
is muted.  
Input  
Channel 1  
REFERENCE AMPLIFIER A500  
If you wish to use the A500 in mono-bridged mode,  
please only use one of the channel 1 inputs!  
Input  
Channel 2  
[7] CHANNElINPUT 2. These are the inputs for channel 2.  
[8] The STEREO/BRIDGED MONO switch is used to toggle between the two  
operating modes of your A500.  
Please power the A500 down using the POWER switch each time you  
change the operating mode. Similarly, only connect/disconnect speaker  
connectors if the A500 has first been powered off!  
[9] OUTPUT 1, OUTPUT 2 and BRIDGED MONO: These are the speaker  
connectors of your A500 laid out as ¼" TS mono connectors. When in  
mono-bridged mode, only use the BRIDGED MONO output.  
TRUTH B2031P  
Fig. 3.1: A500 in stereo operation  
Keep in mind the minimum power impedance of 4 Ohms per channel  
in stereo mode. When in mono-bridged mode, a loudspeaker whose  
impedance is at least 8 Ohms must be used.  
Additional examples:  
Two independent mono signals, e.g. instrument signal and monitor mix  
[10] In addition to XLR or ¼" TRS connectors, you can also use binding posts for  
connecting speaker cables. When in mono-bridged mode, make sure to  
connect your cables to both middle connectors–as shown on the unit itself.  
Bi-amp operation, with the bass signal on channel 1 and the treble signal  
on channel 2  
[11] FUSE SWITCH/VOlTAGE SElECTION. Before connecting the unit to the  
3.2 Mono-bridged mode  
mains, please check if the voltage selector corresponds to your local voltage.  
When replacing fuses, you should only use fuses of the same type and rating. In this mode, the voltages of both channels are added up and routed to just  
With some units, the fuse switch can be put into two different positions in  
order to select between 230 V and 120 V operation. Please bear in mind:  
If you wish to use your equipment outside of Europe running on 120 V,  
you will have to use a fuse with a higher Ampere value.  
one loudspeaker. This results in a doubling of voltage, quadrupling of the peak  
power value and roughly trippling of the continuous power output on a single  
channel. The input and the gain control on channel 1 are used in mono-bridged  
mode. Thechannel 2 control elements are not used. ATTENTION: To avoid  
cancellations due to internal phase inversion, the GAIN control on  
channel 2 must be turned all the way to the left!  
[12] The mains connection is made via a standard IEC RECEPTAClE. A matching  
cable is enclosed.  
Use this operating mode to feed the output of both channels into a single 4-Ohm  
load. Set the STEREO/BRIDGED MONO switch [8]to “BRIDGED MONO.”  
[13] SERIAl NUMBER.  
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REFERENCE AMPLIFIER A500 User Manual  
Please only connect the speaker using the BRIDGED MONO connector [9]or by  
using both of the middle binding posts [10].  
4. Installation  
4.1 Installation in a rack  
Always power the A500 down using the POWER switch whenever you  
make any changes to the operating mode settings.  
Your A500 can be installed into a 19" rack and requires  
two rack spaces. Please use four attaching screws and washers for installation.  
Reinforce the back end, especially for on-the-road use. Please ensure that  
enough cool air reaches the rack, especially if other rack equipment generates  
a lot of heat. Due to its weight, we recommend installing the A500 in the lower  
portion of your rack. If you are installing several amps in a single rack, you should  
leave some space between individual amps (approx. 1 height unit) to allow for  
sufficient cooling.  
Keep in mind the minimum load impedance of 8 Ohms in  
mono-bridged mode.  
Bass  
The A500 has massive heat sinks on its side frame that guarantee  
reliable operation. Never block air supply to these heat sinks because  
excessive heat may damage the components inside your amp.  
Even though the protective circuitry guards the inside components  
from damage caused by excessive internal temperatures, you should  
still double-check where the amp is placed and inspect cable  
connections if you are experiencing thermal protection dropouts.  
BASS V-AMP PRO  
Input  
Channel 1  
4.2 Connections  
BB410  
Inputs  
REFERENCE AMPLIFIER A500  
If you wish to use XLR connections for unbalanced input signals, connect the  
unused pin on the XLR connector (pin 3) with the ground. No modification is  
needed if using mono jacks (also see ch. 4.3).  
Should you register distractive signals such as noise or hissing,  
we recommend separating the amp input from the signal source.  
This way, you can quickly determine if the noise originates  
in the equipment connected to the amp. Always make sure  
to completely lower amplification of both channels before  
powering up the amp (GAIN control turned all the way to the left).  
Otherwise, permanent damage to your speakers may occur.  
Fig. 3.2: Mono-bridged operation  
If your amp is overdriving for a longer period of time, it may become  
muted for several seconds at a time. Always select appropriate volume  
values to avoid overdriving.  
Outputs  
Safety precautions for mono-bridged operation  
Your A500 offers several output connection possibilities: two ¼" TS mono  
connectors and two pairs of touch-safe binding posts. In addition to both  
¼" TS mono connectors for individual channels, the A500 also features an extra  
¼" connector for use in mono-bridged mode.  
A voltage of up to 60 V RMS is present between the output connectors  
of the A500. Always adhere to all appropriate safety precautions when  
connecting your speakers to avoid the risk of electric shock.  
Running your amp in mono-bridged mode puts both the amp and your  
loudspeakers under additional strain. Excessive overdriving can result  
in premature shutting down of the unit itself or permanent damage to  
the speakers. Make sure that your speaker (impedance at least 8 Ohms)  
and the cables you use can indeed handle the power load fed into/  
through them.  
Whenever possible, use thick and short speaker cables to minimize  
power losses. Never route output cables near input cables.  
When using binding posts, make sure that the wire insulation is not stripped  
more than what is necessary, and that wires are completely inserted into the  
binding post so that no bare wire is visible. Cable clamps must be isolated to  
avoid the possibility of electric shock. When running the amp in mono-bridged  
mode, always use the middle two binding post connectors, paying attention to  
correct polarity.  
ATTENTION! If you notice bare cable endings on the binding post  
connectors, disconnect the AC mains and remedy the improper output  
connection before powering the amplifier on again.  
Connecting to the mains  
Always connect your power amplifier to the voltage specified on the rear of  
the unit. Connecting the amp to incorrect voltage can permanently damage it  
(also see ch. 2, under [11] FUSE SWITCH/VOLTAGE SELECTION).  
Before powering up the amplifier, double-check all connections and fully lower  
the gain settings.  
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REFERENCE AMPLIFIER A500 User Manual  
4.3 Audio connections  
Balanced ¼" TRS connector  
Various cables are needed for different types of applications. The following  
illustrations show the correct wiring. Always use high-grade cables.  
strain relief clamp  
sleeve  
ring  
tip  
Balanced use with XLR connectors  
2
1
3
sleeve  
ground/shield  
input  
1 = ground/shield  
2 = hot (+ve)  
3 = cold (-ve)  
ring  
cold (-ve)  
tip  
hot (+ve)  
1
2
3
For connection of balanced and unbalanced plugs,  
ring and sleeve have to be bridged at the stereo plug.  
output  
Fig. 4.3: ¼" TRS connector  
For unbalanced use, pin 1 and pin 3 have to be bridged  
Fig. 4.1: XLR connections  
tip  
tip  
sleeve  
shield  
sleeve  
Unbalanced ¼" TS connector  
Strain relief clamp  
Sleeve  
Tip  
Fig. 4.4: Unbalanced connection using a cinch cable  
Sleeve  
(ground/shield)  
Tip  
(signal)  
Fig. 4.2: ¼" TS connector  
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10 REFERENCE AMPLIFIER A500 User Manual  
5. Specifications  
OUTPUT POWER  
Connectors  
Inputs  
Balanced XLR, ¼" TRS , RCA  
RMS Power  
Outputs  
¼'' TS connectors and ”touch-proof”  
binding posts  
Stereo Mode (both channels driven)  
8 Ω / 1 kHz @ 1 % THD  
4 Ω / 1 kHz @ 1 % THD  
Bridged Mono  
125 W  
185 W  
Circuit protection  
Cooling  
Convection-type  
Short circuit and overload  
Class AB  
Amplifier protection  
8 Ω / 1 kHz @ 1 % THD  
375 W  
Output circuit type  
Peak Power  
Power supply / Voltage (Fuses)  
USA / Canada  
Stereo Mode (both channels driven)  
120 V~, 60 Hz (T 10 A H 250 V)  
240 V~, 50 Hz (T 5 A H 250 V)  
230 V~, 50 Hz (T 5 A H 250 V)  
100 V~, 50-60 Hz (T 10 A H 250 V)  
660 W  
8 Ω / 1 kHz  
175 W  
300 W  
UK / Australia  
4 Ω / 1 kHz  
Europe  
Bridged Mono  
8 Ω / 1 kHz  
Japan  
600 W  
Power consumption  
Mains connector  
Input Sensitivity  
Distortion  
1.64 V  
Standard IEC receptacle  
<0.01 %  
Frequency Response  
Voltage Gain:  
Damping Factor  
Input impedance  
Signal-to-Noise  
20 Hz - 20 kHz, +0/-1 dB  
26 dB  
Dimensions/weight  
Dimensions (H x W x D) 19 x 10.85 x 4"  
482.6 x 257.5 x 101.6 mm  
> 220 @ 8 Ω  
Weight  
18.5 Ibs / 8.4 kg  
10 kΩ unbalanced, 20 kΩ balanced  
>100 dBA  
BEHRINGER is constantly striving to maintain the highest professional standards. As a result of these efforts,  
modifications may be made from time to time to existing products without prior notice. Specifications and  
appearance may differ from those listed or illustrated.  
Controls  
Front  
POWER switch  
GAIN control (channel 1 and 2)  
Rear  
MODE switch  
Indicators  
POWER  
Blue LEDs  
Red LEDs  
CLIP (per channel)  
PROT (per channel)  
Yellow LEDs  
SIGNAL (per channel)  
-30 dB ~ -6 dB  
Green LEDs  
Yellow LEDs  
SIGNAL (per channel)  
-3 dB; 0 dB  
behringer.com  
 
11 REFERENCE AMPLIFIER A500 User Manual  
FEDERAL COMMUNICATIONS  
COMMISSION COMPLIANCE  
INFORMATION  
REFERENCE AMPLIFIER A500  
Responsible party name:  
Address:  
BEHRINGER USA, Inc.  
18912 North Creek Parkway,  
Suite 200 Bothell, WA 98011,  
USA  
Phone/Fax No.:  
Phone: +1 425 672 0816  
Fax: +1 425 673 7647  
REFERENCE AMPLIFIER A500  
complies with the FCC rules as mentioned in the following paragraph:  
This equipment has been tested and found to comply with the limits for a Class B  
digital device, pursuant to part 15 of the FCC Rules. These limits are designed  
to provide reasonable protection against harmful interference in a residential  
installation. This equipment generates, uses and can radiate radio frequency  
energy and, if not installed and used in accordance with the instructions, may cause  
harmful interference to radio communications. However, there is no guarantee that  
interference will not occur in a particular installation. If this equipment does cause  
harmful interference to radio or television reception, which can be determined  
by turning the equipment off and on, the user is encouraged to try to correct the  
interference by one or more of the following measures:  
Reorient or relocate the receiving antenna.  
Increase the separation between the equipment and receiver.  
Connect the equipment into an outlet on a circuit different from that to which the  
receiver is connected.  
Consult the dealer or an experienced radio/TV technician for help.  
This device complies with Part 15 of the FCC rules. Operation is subject to the  
following two conditions:  
(1) this device may not cause harmful interference, and  
(2) this device must accept any interference received, including interference that may  
cause undesired operation.  
Important information:  
Changes or modifications to the equipment not expressly approved by BEHRINGER  
USA can void the user’s authority to use the equipment.  
behringer.com  
behringer.com  

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