[peranders]

Quote:

Originally Posted by jamont The board looks very nice. I wonder: 1) Can it be adapted to 110V AC for use in the US? 2) Can suitable transformers be sourced in the US?

1 Yes, you only have to get transformers for 110 V instead of 230 V.

2 In Europe these transformers are of a standard size but I don't know how it is in USA. Maybe someone can enlighten me?

 

[peranders]

I have listened a couple of hours to the TPA6120 and I must say that this may be the best amp I ever have designed, despite the fact that I'm using rather simple parts.

Morsel, and the rest of the META gang, have you checked out this IC? If not, you may be missing something.

 

[peranders]

Anyone else here who has tested TPA6120?

 

[peranders]

I have made some distortion measurements with the free RMAA software and my rather poor soundcard Canta Cruz Turtle Beach.

0.0058% at 39 ohms load and 0.0065% with Sennheiser HD545. Otherwise pretty good results. I will upload the results later.

 

[Garbz]

what the... higher distortion for senns?

I've been planning to use this chip for a while. Got 3 lying in my desk draw unused atm. Project was put on hold till i got my gilmore rebuilt, and till my exams are finished.

Is it a necessity to have an electrical connection from the power pad to GND? Otherwise i was going to use heatsink paste. There's something just not good about blasting the bottom of the chip with excessive heat in an uncontrolled environemnt.

 

[peranders]

Don't pay any higher attention to these figures becuase levels must be tuned carefully if you really want to compare. Besides the soundcard allne has 0.007% dist! See my results as indications of good perfomance.

 

[peranders]

Test results can be found here
http://www.sjostromaudio.com/hifi_fi...RV07_HD545.htm

 

[was ist los?]

I've had a TPA6120 amp for a while now. I use it with SR-60s for the computer. Great amp! I must say i find it more enjoyable than Mints or Pimetas. The highs and lows are simply more extended and present. This is comparing to AD8620 equipped multiloop amps.

 

[peranders]

I have got a couple of reports about the TPA6120 (not using my board) and they all point in the same direction.

Morsel and your pals, TPA6120 is worth checking out! It's not very hard to solder either if the pcb looks like mine.

 

[patricklang]

Maybe I misread it, but are you using a gain of 2 at the AD8610?

Also, have you tried this with any power-hungry phones like the K501 or k1000? With its quoted output power of 1.5w, this looks like it could be a good contender for the 501

 

[peranders]

The gain is -1 for the TPA6120 and 2 for the input buffer. If you want more info you can download from from my homepage.

I have only tried with my Sennheiser HD545 and I get a very high volume with my signal sources but it's very easy to increase the gain, only change a resistor.

 

[peranders]

Delete this post please.