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Old 7th December 2012, 03:03 PM   #1
amonte is offline amonte  United States
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Default Issue with TA1600

Hey everybody. Long time reader, first time poster. I've got a weird thing happening with my new monitor setup and I'm hoping you guys can offer some insight.

Just set up a a pair of Alesis Monitor Ones (MK1) and an Hafler TA1600. I bought both items second hand a few weeks apart so I have no previous base line to compare either item to.

I hooked everything up tonight and did some playback tests and noticed that the speaker on the left side had more low end, less high end and overall a little more volumne than the speaker on the right side. Swap the leads going to the speakers from the amp, the speaker on the right side now had more low end and less treble and more volume. Whatever the issue is, it was definitely coming from the amp.

My first reaction was to simply turn up the right channel just to get more of an even stereo image. This seems to work fairly well, but I wasn't sure if this sort of "compensation" is normal or if there is an issue with my amp. Is this just because it's a lower end amp? Has anyone else had this issue?

I have read a few threads on here about people talking about non-existent bass and piercing treble as caps go bad, along with a major loss of volume. I need to go back and really turn them up and listen, but I didn't notice a total lack of low end - there was definitely LESS low end and less volume but it's not so bad where something sounds completely off. Also I wasn't sure if the lack of low end is simply a product of the amp or the monitors or the combination of the two.

I'm considering attempting a recap, but I'm not sure what to expect in terms of level of difficulty. I've built a few tube amps and stomp boxes, but I've read these have some SMD components.
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Old 8th December 2012, 02:50 PM   #2
amonte is offline amonte  United States
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Confirmed today with additional listening at louder volumes. Channel One is quiter than Channel Two and has virtually no low end. I know some of you guys have recapped these - did you focus on specific areas of the circuit or do a complete recap? I have seen some schematics (need to dig them up), but no layouts. Does anybody have one?
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Old 10th December 2012, 02:58 AM   #3
amonte is offline amonte  United States
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Checked the voltage the amp was putting out on each channel using a 60hz source and it does appear that Channel 1 puts out about a third of the power of Channel 2 at 50-100% volume. I'd like to try a recap on this, but I'd be interested in hearing from anyone who has done one on a TA1600. Thanks.
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