Ongbs,
Thank you for the continuous reports. 

X2 is referring to its class, ie. class X2 and these type of capacitors are used mainly for RFI suppression applications, more info here: class X2 caps.

BTW, are you using the single 8200uF Panasonic cap in psu section? Do try with a pair of smaller values caps like 470uH and listen to the 'micro details'; see whether our conclusion same or otherwise. 

You like the ERO caps, so do I but remember: "one man's meat is another's poison". 

no sub. just  normal bookshelf speakers. caps -lelon, 16v 4700uf. could be a voltage surge?

ongbs
yeah you're right. could not be any surge otherwise the whole board would become useless. anyway thank goodness the board is alright. i wonder why nobody mention whether i'm alright., hahaha

.......

The MAX9768 delivers up to 10W of output power into an 8 ohm speaker with a 14V supply, and features high 77dB PSRR, low 0.08% THD+N, and SNR up to 97dB. Additionally, it provides robust short-circuit and thermal-overload protection, comprehensive click-and-pop suppression, and a low-power shutdown mode. Fully specified over the -40 degrees Celsius to +85 degrees Celsius extended temperature range, the MAX9768 is available in a small, 4mm x 4mm, 28-pin TQFN package."

The maxim products use a feedback system to get rid of the DC on the input side, and an intermodulation system for the switching signal on the output. 

No caps.

However that doesn't mean that they sound good using this system.  Its notable that they also have an internal switch to remove the no filter trick.  If you are using them like we do, ie with the speakers far away from the amp, its recommended to add an external output filter.  They also point out that you get high SNR with no output filter.... 

I have a couple of the new MAX9744 chips in my parts box.  I was thinking about making an amp with them at some point...

**edit  Beaten to the punch****

morning folks!
ongbs, you're constantly in at around 3am ya.. I can no longer do that.. am beat with all the celebrating and makan...

So much talk about the MAXIM Class D,   I don't think it is meant for DIY..

At any rate, I am terribly happy with the TA2024.. few 'minor' tweaks left to do and thats about it! And I am afraid.. the thread may come to an end..(?)

OK Now a very important thing to discuss. OUR FIRST T-Amp TT Session!
Where and when?

Note: We're at PAGE 100 today! 

wah 100 page wor....in audiophile section...

yes march05 hows your t-amp? tt session either at jazzy's or Y.C.'s placelor...hehehe

jazzy left any rendang for us ah

Good morning, guys.

Hmmm... this thread is still rather quiet with hardly any response, very unlike normal. 

As metalmania has pointed out above, capacitors (or solid passives in his words) must be allowed to run in and they would usually sound  differently from when they are new. I agree with Xtorm that most if not all of us here would like to listen to ekool's "baby" when we have our T-amp t/t session. Where is the most suitable venue to listen to our slightly different sounding T-amps? I would not mind us having it at my place but we would only be listening to the T-amps driving a tiny pair of 86dB/1W/1m bookshelf loudspeakers called Q Acoustics 1010. Everyone game for it?
It would be nice to have Ongbs around too; we could always arrange our t/t session to coincide with the time he is coming to KL.

Different people listen to different genres (read types) of music; even if a same piece of music is being played, different people will appreciate it from different perspectives altogether. I call this the tale of an elephant with few blind folks!

Some folks tune their loudspeakers to suit the T-amp whereas others may tweak their T-amp to get the best out of their loudspeakers. I suspect ekool to be doing exactly that now. He is using a pair of JPW Sonatas which I remember as typical British sounding – polite yet with a killer mid to die for. He could be enhancing treble and bass in his system to attain a more balanced sound.

I like the T-amp even in stocked form, especially the newer boards with the 470uF caps in power buffer section. Replacing these with higher value of say 1000uF would not reduce the high frequencies but the tonal balance actually shifts from one that is feminine (yin) to masculine (yang). Try to listen to music with an integrated amplifier vs AV receiver and you will catch my drift.

Also, it is only after some extensive listening to various types of music that we would discover some 'micro details' are also lost. I like the T-amp’s tone, micro dynamics, details and rhythmic sound and I deduce matching the 15W amp with these loudspeakers would be a great match:

[attachmentid=617876]
JVC SX-WD1KT Wood Cones

[attachmentid=617878]
Pioneer Pure Malt S-A4SPT-PM

bro,

The JVC one look like DIY kits, how much does it cost?

hi guys,
sorry could not post earlier cos my line was so... so... slow. uploading took so long i decided to quit. that's streamyx for you.

y.c.
i'm using 22.2uf for each channel and like metalmania said the sound may or may not sound good. at the moment i am very happy with it and no complains.
later, yet to be seen. like our jazzy bro said - if you like it, keep it. it's all a matter of personal taste. right on bro!!! i'm with you.

yes! y.c. you're right! i'm tweaking the t-amp to suit my sonatas. the sonatas are very polite and even a bit shy if you do not know how to pair them. but once you get it right they can be killers yet small in size just like the t-amp.    say what you like i have always like the british sound compared to american. jap - last choice if possible.

sure i can bring my baby in but it has to be on  a friday. other days incl. weekends i'm not free. so where and when? karaoke joint? not a bad idea.abanyayaya.  so who's gonna put this tt session in session???? y.c.? jazzy? xtorm? ongbs?

ongbs
three main  reasons why you get a distortion.
1. you input current is too high  if this is the case your caps could be faulty, leaking or shorted. wrong values used could also be the cause
2. you output current is also too high same reason as 1.
3. your speakers does not match the amp. in this case it is very unlikely cos the t-amp is very friendly and can handle most speakers available.
i have tried it with a few different speakers and have no problems from cheap jp speakers, mini compos, bookshelves to floor standers. please check and let us know.

In fact, as far as I can see from my text books, most `laws' in nature are non linear, exponential ones are more common and some are  downright chaotic! 

Oh, thanks for another vote of confidence that my T-amps do not really need any modding. However, I think if bsl555 were allowed lay his hands on them it'll be a different story....anyways, he has given me his opinion of them after our weekend `shootout' against the NAD. It'll remain a secret unless he chooses to reveal it to you folks himself.

Okay, the depth of my DIY efforts....just in case you folks think I'm a total nincompoop with the soldering iron....a Y.C. cap now drives my Mitchell turntable PSU! (psst...bsl helped me find it, the capacitor I mean, not the turntable, at Jalan Pasar, together with a spanking new Hakko soldering gun, but honestly, I did the soldering all by meself.)

Yes Mr C! I would be most delighted as your office is only a couple of minutes walk from my house! It actually would take me longer to drive as I would have to do some u turns and find a place to park! 

I can bring my sandfilled stands if you don't mind the stained paintwork and rustspots. I'll also bring along my battered pair of Heybrooks 'cause if the TA2024 can drive them to reasonable loudness, I'll get one T-amp kit and turn these old speakers into a pair of pc multimedia transducers.

---

Added on October 9, 2008, 3:32 pm
jazzy bro, you are so uplifting!

But before I start turning them tiny screws, I'd better figure a way of calibrating the levels so that if things don't work out, I can still set them back to the original factory defaults. Any suggestions? I think I will need a constant tone generator, and some kind of meter/oscilloscope to measure/record the output. Can a simple multimeter switched to the AC measurement work for the second part? Would I also need to jury-rig a dummy 8 ohm resistance to simulate a speaker load?

We're moving fast into page 102. good work guys!
Looks like we're back in action!

xtorm,
good proposal! only I am NOT free this weekend ler.. next weekend better chance. Anyhow, Y.C. is yet to complete the mods/upgrade. So we'll let our first host be ready
How big is the crowd ler?
What about ongbs? When are you coming down?
mysghooi, I know you're in Perak but do you keen in joining us?

The anticipated attendees would be:
1. xtorm
2. Y.C.
3. ME
4. march05
5.(ongbs)
6.metalmania(?)
7.gabanyayaya

Did I missed anyone or is there anybody else that like to join us?

Thats an interesting proposal!
Who's gonna bring the mixer, mic, karaoke CDs/VCDs etc?

ongbs, that's a good idea. I'll implement it as well. I'm not going to miss a trick on this complicated trimpot adjustment.

wah then i bring t-amp enough...

so next week saturday? usj 10? the 1st tt, then 2nd tt at jazzy house

Hey ongbs, you're early tonite huh?

Hey ongbs, you're early tonite huh?

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Added on October 10, 2008, 12:57 amekool,
karaoke place too much distractions.. not quiet enough to listen to the T-Amp sounds proper... at anyrate, they're not really that sound proofed!