PowerPad and the ultra extreme headphone amp TPA - Page 3

carlosfm · 13th August 2004, 10:11 AM

P-A, I received a very nice message on my PM some days ago telling me that TI sells the PCB of the appnote.
In the States it's $49.
That guy bought it, built and reported me the results.
That's why I said I have "news" that this chip is worth a try.

peranders · 13th August 2004, 10:32 AM

Quote:

Originally posted by thomas997
I like it but its not quite powerful enough for my needs.

How do you mean? What type of headphones do you have?

thomas997 · 14th August 2004, 12:52 AM

Quote:

Originally posted by peranders

How do you mean? What type of headphones do you have?

Some crappy Sony MDR or something. Not very good.

Its just that the output I have is very low, so I will try increasing the gain and see how it does.

Soldering is a little challenging. If you can find some sort of socket for it, that would help a lot.

Carlos: I tried with 12V as well, seemed to help a little. and yes i need to increase the gain. Just wanted to build it identical to the datasheet first.

00940 · 14th August 2004, 01:59 PM

There must be something wrong with your amp. There are a few TPA6120a2 running and nothing like this lack of power was reported. Check for example this thread : http://www4.head-fi.org/forums/showt...ghlight=tpa%2A

peranders · 15th August 2004, 07:05 PM

Thomas, I vote for something isn't otpimized. Weak input signal? Altough with only gain of 2 your ears will hurt and 5-7 Vrms will make your headphones to glow.

An oscilloscope may do some good. Can you drive the amp to clipping for instance.

carlosfm · 15th August 2004, 07:53 PM

Quote:

Originally posted by peranders
Altough with only gain of 2 your ears will hurt and 5-7 Vrms will make your headphones to glow.

Nah...
With a portable device?
I can bet that the mp3 player doesn't even get to 1V output.
500mv~750mv is common for portables.

You can't ask much more for a thing that runs with one or two 1.5v batteries...

Upupa Epops · 15th August 2004, 10:14 PM

Hello again, guys

. What do you think about this idea : ten of these chips connected in parallel will can easy drive an speaker box and I mean, that it will be more better than any Aleph or Hiraga

. Any comments ?

Upupa Epops · 15th August 2004, 10:35 PM

Mea culpa - not Aleph, Zen

.

carlosfm · 15th August 2004, 11:59 PM

Quote:

Originally posted by Upupa Epops
Hello again, guys . What do you think about this idea : ten of these chips connected in parallel will can easy drive an speaker box and I mean, that it will be more better than any Aleph or Hiraga . Any comments ?

Mmmmm...

Well... if you parallel another 10 and bridge 10+10, we may be talking more serious business.

peranders · 16th August 2004, 07:30 AM

Carlos, I ment of course that the gain must be adjust for the application. If thomas has a weak signal he must increase the gain which is done very easily.

15th August 2004, 07:05 PM	#25
peranders Electrons are yellow and more is better! diyAudio Member Join Date: Apr 2002 Location: Göteborg, Sweden Blog Entries: 4	Thomas, I vote for something isn't otpimized. Weak input signal? Altough with only gain of 2 your ears will hurt and 5-7 Vrms will make your headphones to glow. An oscilloscope may do some good. Can you drive the amp to clipping for instance. __________________ /Per-Anders (my first name) or P-A as my friends call me Tube Buffered Gainclone in work \|Thread

16th August 2004, 07:30 AM	#30
peranders Electrons are yellow and more is better! diyAudio Member Join Date: Apr 2002 Location: Göteborg, Sweden Blog Entries: 4	Carlos, I ment of course that the gain must be adjust for the application. If thomas has a weak signal he must increase the gain which is done very easily. __________________ /Per-Anders (my first name) or P-A as my friends call me Tube Buffered Gainclone in work \|Thread

Thread Tools	Search this Thread
Show Printable Version Email this Page	Search this Thread: Advanced Search

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
New Amplifier - ULD Extreme	Carl_Huff	Solid State	455	29th January 2011 12:17 AM
The "Freebird" ultra clean ultra simple preamp design	Russ White	Chip Amps	87	11th August 2008 09:28 AM
Seeking ultra, ultra mini 1uF elec cap	Triophile	Parts	11	6th April 2005 11:17 PM
Extreme DAC 3.0	martioz	Digital Source	3	11th March 2003 10:45 PM
Really, really extreme phono, more extreme than mine	peranders	Analogue Source	34	22nd October 2002 11:59 PM

New To Site?	Need Help?
Register to Participate Search Privacy Statement Contact Us	Frequently Asked Questions Did you forget your password? Mark Forums Read


	Please consider donating to help us continue to serve you. Ads on/off / Custom Title / More PMs / More album space / Advanced printing & mass image saving

13th August 2004, 10:11 AM	#21
carlosfm Banned Join Date: Mar 2003 Location: Lisbon, Portugal	P-A, I received a very nice message on my PM some days ago telling me that TI sells the PCB of the appnote. In the States it's $49. That guy bought it, built and reported me the results. That's why I said I have "news" that this chip is worth a try.

14th August 2004, 01:59 PM	#24
00940 diyAudio Member Join Date: Sep 2003 Location: Paris	There must be something wrong with your amp. There are a few TPA6120a2 running and nothing like this lack of power was reported. Check for example this thread : http://www4.head-fi.org/forums/showt...ghlight=tpa%2A

15th August 2004, 10:14 PM	#27
Upupa Epops diyAudio Member Join Date: Aug 2003 Location: Prague,Czech Republic	Hello again, guys . What do you think about this idea : ten of these chips connected in parallel will can easy drive an speaker box and I mean, that it will be more better than any Aleph or Hiraga . Any comments ?

15th August 2004, 10:35 PM	#28
Upupa Epops diyAudio Member Join Date: Aug 2003 Location: Prague,Czech Republic	Mea culpa - not Aleph, Zen .