Pre amp building

Zoe · « **on:** 2 Nov 2003, 03:18 am »

I want to build a pre-amp. But I don't have a power amp. I just have a couple of integrated amps. Assume I build a pre-amp. Will it be difficult or even feasible to utilize just the power section of my integrated and use the newly built pre-amp to feed it a signal? I figure it must be possible, but for a novice like myself, maybe it is a bit to ambitious. What do you think?

fred · « **Reply #1 on:** 2 Nov 2003, 03:58 am »

What integrated amp do you have? Does it have pre-in inputs?

AKSA · « **Reply #2 on:** 2 Nov 2003, 03:58 am »

Zoe,

Yes, perfectly possible. There are many integrateds which have an entry point for the power amp at the rear panel; check yours. Often you will find 'pre-out' and 'pwr-in' RCAs in this position.

Failing that, a bit of inspection from someone experienced with these beasts can help. But you do need to know what the sensitivity of the power amp section is; it should be at least 26dB, and this can often be found in the specifications.

Cheers,

Hugh

Zoe · « **Reply #3 on:** 2 Nov 2003, 04:29 am »

The amp that I figure I can do this with is the Jolida 502b.

AKSA · « **Reply #4 on:** 2 Nov 2003, 06:30 am »

Zoe,

If the amp is tube, then construction techniques will be traditional, and patching in a power input might be quite simple. BUT, you'd need to know the circuit, and levels in the circuit, so you'd need a schematic.

I'm pretty sure that Response Audio would be cooperative, am I right?

Cheers,

Hugh