Behringer A500 as a DIY project

[mootzeroni]

Originally Posted by audiogeekess

Yes R1 = 0k and R2 = 20k.(edit)

Thanks for that A.G.... I'm considering re-boxing this ep2500 and converting it to passive cooling with larger heatsinks. Will start a separate thread tho since this was for A500.

[tomtiger]

Hi,

I wanted to add, that for bridge mode the volume pot for channel 2 - according to the manufacturer - must be set to gain off.

In that case - if I understood it correctly - R1 = 20k, R2 = 0K was the desired setting.

If that is correct, I would recommend to replace the current mode switch with a multi way switch, that will additionally switch the resistor on channel 2. Would be most elegant.

Or disable the mode switch. Otherwise, if the modded amp will be sold, the new owner might wonder why bridge mode does not work.

Please correct me if I am wrong,

regards Tom

[sololaptop]

I have a Berhinger A500 which is set to 120v input (US model). Can somebody explain to me how to rewire it to be used in 220v input countries? Thanks.