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diviy
10-10-2014, 21:21
Currently using a Arcam A65 as a preamp and a Arcam 8p power amp .
I managed to find another one for cheap so I have connected them up as a mono set up but for some reason one channel is sounding way better than the other .The only differance in the amps is one has a cim module that has a L and R gain control
So any ideas how I can match the amp to the same gain ?
Macca
10-10-2014, 22:11
If there was just a difference in gain between two otherwise identical mono amps then I'd expect one channel to be a little quieter but not for one to sound better, certainly not a whole lot better.
diviy
10-10-2014, 22:14
I'd expect one channel to be a little quieter
Sorry that`s what I ment
Macca
10-10-2014, 22:21
Okay then my guess would be that you have two different iterations of the same amp but for reasons best known to the maker, with different gain. But one amp has adjustable gain. So you should be able to match it with the other by ear. Use a mono recording if you've got one.
struth
10-10-2014, 22:33
Not so sure it will work that way. I take it you are taking the second power amp from first? I tried that with some Cambridge stuff and although it was designed to do it I am not sure the Arcam is....Best way is to use integrated for hi and power for low....
337alant
10-10-2014, 22:45
Instead of setting them up as mono blocks, wire them up as stereo bi amped. Experiment, swapping the amps between the tweeters and woofers to see which you like best.
I would use the amp with the CIM module for the bass drivers and experiment with the levels :eyebrows:

Alan
diviy
17-10-2014, 20:20
After much swapping ,checking I have found that it one of my speakers that`s gone down .
To describe the fault one speaker has a lower volume and a very slight distortion and if you look at the two speakers in action the movement of the good speaker is moving three times as fast as the faulty one ,I can`t see any tear`s in the cone could it be a crossover I do play music very loud :):):)
so any ideas how to test the crossovers I was thinking of just swapping the speaker`s drive units to test them or if it`s a faulty crossover could it damage the speaker .
the speakers are KEF Q15
.
Macca
18-10-2014, 08:15
If you like it loud, KEF Q15 are not where I would start...;) Does sound like you have blown something in the crossover. I'd stick them on the back burner for now and get a speaker that is designed for serious SPL, ideally a three- way of some variety that will soak up the power without complaining.