Sonic impact t-amp problem/question.

[doogyscoot]

Hi all, I appreciate it is possible that this has been covered in another t-amp thread but I have read quite few and can't find anything.
Just got one (gen1) as a beginner mod project, just the usual.
However, while it sounds pretty good as is I get the impression that the volume seems to drop a bit when say there is a fairly bass heavy part then more parts in the midrange come in. It's like the level of the bass just floats away a bit. It sometimes slowly seems to return to normal level. I think this is even happening at lower volumes but its harder to tell. The nearest thing I can equate it to is that thing you get if watching a live band outdoors from a distance and the wind comes along and blows some of the frequency range away, though not a pronounced maybe.

I'm still using a basic wall wart which only has 500mA to it so could this have something to do with it? I will be adding some decent sized tank caps too and running it off either a large battery or an SMPS. I'm hoping its just that the amplifier doesn't have enough readily available current to deal with more complex a and bass heavy sections and the future mods will resolve this. Did anyone else notice anything like this with theirs as stock?

My thanks in advance for your responses.

Doug

[Nuuk]

I'm still using a basic wall wart which only has 500mA

That's your answer!

[doogyscoot]

Yeah, I kinda knew that was the obvious answer... I just wasn't sure that the low rated PS would cause the low end drift off at low volumes. I was worried it was something up with the amp as it's an ebay job. I actually have an SMPS which gives about 5A but I need it for a battery fast charger so I can't swap the connection on it.

Just wanted someone else who had used it with a crap PSU as standard to tell me theirs did the same.

Ta