T-Amp or 41HZ Amp3

The AMP3 has a bit more power than the Sonic Impact amp. I've yet to get my AMP3 assembled (damn SMD crap), but it SHOULD sound better because it uses better parts. Higher capacity caps, toroids instead of the crappy stock inductors on the SI amp, etc should add up to a better sounding amp. How different the chips are is beyond me though. The SI amp uses the 2024 and the AMP3 uses the 2021. I will say though, that the AMP3 PCB is much higher quality. It's much thicker and the traces are better. I'll have to do a comparison when I finally get my AMP3 completely assembled.
 

dmigo

Member
2004-06-10 6:31 pm
Taiwan
I am very interested in 41Hz amps. Just cannot decide which one to go, Amp1 or Amp3, because the power of Amp3 seems not enough for my 87dB 1W/1m speakers. I am wondering if I can use two Amp3s for bi-wiring? Anyone out there has experience of Amp1? How dose it sound?Any input would be appreciated.
 
Amp 3 can be powered from a single SLA 12 volt battery.

Amp 1 needs + & - 30 VDC and 5 volts DC.

The power supply for Amp 1 will take quite a bit more money to build. I have one of the Amp 1 boards completed and I just received a case to mount it in.

Getting all the power supply parts will take me a bit more time.

If you can handle the SMT parts and chips, a pair of Amp 3s should be able to power your speakers, if you do not have too big a room.

I ran a single Amp 3 board on my 3 way 88 dB Scan-Speak driver speaker sytem in my small office with no trouble.
 

mb

Member
2002-12-04 2:51 am
Singapore
I fully second Wayne's comments on the Amp3. It's better than the T-amp by quite a margin, and there are some components on the T-amp pcb that are not amenable to upgrade, eg. the poor quality inductors, the single supply cap, etc.

My Amp3 on SLA sounds like it has 4x the oomph of the T-amp on the same battery. I suspect that with a good ~14V supply I will get even more headroom. I'm driving infamously difficult Gales 401As (~84dB/W) that have good bass to 30+ Hz, and it's easy to hear the difference in quality betw the Amp3 and (modded) T-amp. Be prepared for patient and careful smd soldering though.
 
I have ordered the AMP 1 from 41hz as I wanted the extra power to drive 85db speakers. However, I am confused about the power supply required. Can anyone explain to a beginner what is needed for the +-30V supply? ie. Can I get hold of an external power supply/transformer or does something need to be constructed - if so what? and any idea where parts etc... can be sourced from in the UK?
Many Thanks!
 
locky said:
I have ordered the AMP 1 from 41hz as I wanted the extra power to drive 85db speakers. However, I am confused about the power supply required. Can anyone explain to a beginner what is needed for the +-30V supply? ie. Can I get hold of an external power supply/transformer or does something need to be constructed - if so what? and any idea where parts etc... can be sourced from in the UK?
Many Thanks!


Take a look at:

http://www.41hz.com/Forums/forum.asp?FORUM_ID=3&sortfield=lastpost&sortorder=0&whichpage=2

By
 
You will need a power cord and/or inlet to the chassis. Fuse holder. Transformer of 300VA with 22 VAC center tapped. Rectifier bridge. Smoothing power supply capacitors of about 10,000 uF @ 50 volts.

You will also need a 5 volt regulator and the associated parts to make one up.

The 22 VAC transformer @ 300VA seems to be a bit of a rare bird. I have only found one, which is made by Plitron. Cost including shipping to CO is about $100.00
 

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Wayne1 said:
You will need a power cord and/or inlet to the chassis. Fuse holder. Transformer of 300VA with 22 VAC center tapped. Rectifier bridge. Smoothing power supply capacitors of about 10,000 uF @ 50 volts.

You will also need a 5 volt regulator and the associated parts to make one up.

The 22 VAC transformer @ 300VA seems to be a bit of a rare bird. I have only found one, which is made by Plitron. Cost including shipping to CO is about $100.00

Try Victoria Magnetics. He will wind you one up. I think they run about 60.00 plus shipping. About 75.00 total. And delivery is qucker.


George