Help me understand audison LR605XR 5-ch amplifier

[coolnose]

Hi,

I had to open an audison LR605XR 5-channel amp to replace a trimpot in the crossover and have some some questions.

I "think" I can clearly identify 6 channels. 4 small channels with 1 pair of OT each on the input side of the amp and 2 bigger channels with 6 OT each pretty much in the center of the amp.

I initally thought that the signal for the subwoofer was splitted off on the input board, probably summed in some way and amplified, thus 5 channels.

What is the usual way 5 channels amp are build ?

Just curious on this one, as I thought about checking the bias before putting it back together and that question puzzled me, even if not directly related.

Thanks in advance,

Max

 

[Perry Babin]

There is no 'usual' way. Each manufacturer decides what's best depending on their target customers or the cost of production.

 

[ppalli]

Sub channel consists of two amplifiers in bridge configuration, each with 6 OT. This is in order to obtain high power with the same power supply voltage of other channels

 

[coolnose]

Thanks to both of you for your input!