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Old 17th April 2013, 07:40 AM   #81
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It seems odd to me that all the Tripath products would be NOS from 5+ years ago.
According to Wikipedia, Cirrus Logic bought Tripath in 2007. The same year the former VP of Cirrus' Mixed Signal Audio division became CEO.
Other sites report that Tripath Technology was merged with Etelos in 2008.
I don't know what is correct, but I would guess that the Tripath chips are still in production at an Asian fab.
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Old 17th April 2013, 07:41 AM   #82
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I've only heard that tripath went into bankrupcy.
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Old 17th April 2013, 07:59 AM   #83
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No idea who holds the rights at the moment but original Tripath chips are still being produced in Korea. And counterfeits (or could be licensed but they are inferior) chips are still being produced in China.
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Old 18th April 2013, 12:21 PM   #84
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Originally Posted by Saturnus View Post
No idea who holds the rights at the moment but original Tripath chips are still being produced in Korea. And counterfeits (or could be licensed but they are inferior) chips are still being produced in China.
Thanks! That's an excellent clue. So that's why my bargain ebay TA2020 board was lackluster sounding and MUCH Less power than expected. It had the big good quality inductors and didn't hurt my ears like most class D; but that was only one thing on a very long list of what it didn't do. It also wasn't very efficient. Certainly at low volume playback it was probably more efficient than Class aB, but definitely the China made TA2020 was less efficient than a Philips aB car chip when up near full blast. Well, at near full blast, I'd expect "similar" but I'd never have expected a Class D to be beaten by a linear. And it was. So that was a weird mystery. Next time I want a Tripath, I'll try to find the Korean made version. Thanks for solving the mystery!

P.S. Still awaiting the TDA7297. I wonder if it is efficient like the Philips? I got the TDA7297 like the first thread, with the Lilliput heatsink, so I'll be finding out something about the efficiency. If it runs cool, I'll try it on battery.
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Old 18th April 2013, 05:00 PM   #85
redjr is offline redjr  United States
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For the TDA7297? A whole bench? Howabout a music collection and a fun little speaker project? Also, laptop based measurement and a hard drive packed full of tunes. The "something to do" could be updating that music collection with lots of exploring and listening...
There was a little smiley face I included with that statement. The little bugger hasn't even arrived yet. No I won't need my whole bench, but I'm already working on minor issues with two other amp projects I brought to my home-away-from-home. Even that is proving somewhat difficult without all my tools readily available. But I get your point.

BTW, speaking of laptop based measuring hardware/software. Can you recommend something for a novice that won't break the bank that would allow for general measurement of an amp. Seems like I should have a tool like that in my bag of tricks if I continue to take on these amp projects.

Rick
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Old 18th April 2013, 05:21 PM   #86
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You might see if your laptop's sound driver has auto connector sense or manual so that you can switch the mic port to line in port.

And the measurement software is free: Download. Audio Rightmark
See also the documents on sorting out the source devices--an excellent head start.

I can't remember how to make the bridge amp to line level adapter though.

P.S.
I'm also at "home away from home" and have a 1980's analog multimeter and a patched up soldering iron. Just about done with making a nice new power supply though.
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Old 18th April 2013, 05:49 PM   #87
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Hooked mine up today and am pleasantly surprised I must say. Sounds quite good. I am using my foam core TB W3-881 specials. So my quest for cheep decent sound is going well. For about $30.00 for everything but the source, I have a system that rocks rather nicely. Should spiff it up a bit with some paint for the speakers an a box for the amp so add another $5.00, not too shabby.
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Old 20th April 2013, 01:37 AM   #88
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Hooked mine up today and am pleasantly surprised I must say. Sounds quite good. I am using my foam core TB W3-881 specials. So my quest for cheep decent sound is going well. For about $30.00 for everything but the source, I have a system that rocks rather nicely. Should spiff it up a bit with some paint for the speakers an a box for the amp so add another $5.00, not too shabby.
Do you have photos of the FC 881si speakers? If you are interested in an 881si that will rock loud, check out the latest plans for a quad driver MLTL in the Accidental MLTL thread in full range.
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Old 22nd April 2013, 05:42 PM   #89
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I took delivery of my TDA7297F this morning and connectd it to my speakers, it looks ridiculous but the little amp drives them easily.
http://s20.postimg.org/khob7zsot/7297f2.jpg
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Old 24th April 2013, 11:21 PM   #90
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I took delivery of my TDA7297F this morning and connectd it to my speakers, it looks ridiculous but the little amp drives them easily.
http://s20.postimg.org/khob7zsot/7297f2.jpg
I have been auditioning this little amp for 3 days and I love it, with my 40+ year old old monkey coffins the sound is pretty amazing, it beats out the Tripath TA2020+, which I have several of. The bass is the winner for me, just magic.
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