At this juncture, it appears that the quality issue of JP LEDs is the most probable reason for calculation to be out. A 1K resistor should have been a correct value for use with 1 single LED.

We need to observe correct polarity during connection - the resistor must be connected to the anode (+ve side) and not the cathode (-ve side) of the LED.

Okay folks, our T-amp t/t session is ON from 15.00 - 18.00 hours TODAY.

That would be the only logical answer to your(our) LEDs issues.
1K would be more than suffice.. 470 Ohm being the 'normal' series resistor.
Having that in mind, what about other semiconductors that we bought from JP? Transistors, ICs what nots..?

Great! few hours to go.. I'll be bringing in my Junior..

Catch you guys later.

They exist alright. Just you have a keen eye to spot them out. Have nice day folks!.

Easy for you to say!
Yes. I have more than once bought a few 'look like the real thing'.. for obvious reasons they don't last that long.. or circuits don't actually work like they're supposed to..
If it's way too 'cheap' then, it's a sign...

Would it be safe then, to get 'everything' from Farnell or RS?

Have a great weekend bsl.. yes we know, you're gonna be busy...

I'm not too trusting on China made electronic products nowadays. It makes me often wonder how they obtain loads of "audiophile name" capacitors that are so difficult to obtain and in limited production quantity, yet sell the built up item at too irresistible a price. Recently I came across a fake Elna Cerafine filter caps with terminals that easily snap off. I know Elna won't stoop as inferior as this.
Yep, I'm right in the middle of doing much things now, only a periodic 5 min break to read this forum.

This post has been edited by bsl555: Oct 25 2008, 01:53 PM

Hmm...weird...no one ever done the review on yesterday's meet?

Agree, was anticipating review of the meeting since evening

Ok, my first observation on the T-amp session: 3 hours is too short for this kind of shoot out! We barely scratched the surface running through let's see - 7 or 8 (I lost count of jazzy's mods) variants of the TA2024.

But one undeniable constant stands out - the TA2024 is one heck of a kick-ass performer at this kind of price range. By the latter half of the session, I was more engaged in listening to the music samples brought by the participants rather than auditioning the T-amps - which shows how well this Tripath product translates the material and allows the info through with very little negative impact.

My verdict:
Pros.
well above average detail,
seductive on Female Vocals,
authentic Pianos,
good 3D space.

Cons
so-so on winds
bass is a little woolly and insecure.

However, please take into account that the listening was done in an office environment, and using my well beaten pair of HB2s ... so we're not yet getting near the best of what this little monster is capable of!

My apologies for not staying to the end, but I hope you guys enjoyed yourself all the way through!

Y.C., thanks for being an excellent host, plus the home pick up service!

Good report Bro March.
Thanks for the usage of your superb HB2 and the stands..
Too bad you missed one of the best 'mee goreng mamak' in SJ
Yes. Many thanks to Y.C for the venue, drinks n 'makan' and hospitality..
Good news is, 'someone' already agreeable to use his place for the next T-Amp TT-Session!

Waiting for Y.C to say something..

This post has been edited by jazzy939: Oct 26 2008, 01:34 PM

Been listening to T-amp alot these days. one day i notice is: when play music, the volume at left speakers seem to be louder. Esp the vocal, is like on the left side. guys have any idea ?

Never had such a problem. Are you sure it is not originated from your source?

i use PC to drive t-amp. i guess it related to speaker position also

A quick report from my perspective on our first T-amp t/t session yesterday:

The listening was done in a less-than-perfect office environment instead of our comfy home but I thought we did have some fun time together listening to our little 10W giant-slayer T-amps. We had joked over drinks 'n' makan that the sound we were listening to earlier was so enjoyable that perhaps we may have even preferred T-amps over Krell amps.

March’s old faithful of original Heybrook HB2 (first launched in 1979), a pair of standmount loudspeakers with medium sensitivity of 86dB/1W/1m were setup midway into the listening area, some 7 – 8 feet from the rear walls with no reinforcement to the bass. To me, this pair of loudspeakers represents one of the best British products ever made. What we heard was good depth, fabulous midrange and decent bass (definitely insufficient to bass lovers) and the overall sound is thoroughly musical and well-balanced that we enjoyed all music played through them. The sound would have been a little different if full range floorstanders of high sensitivity were used instead.

The shootout:
In term of look’s department, Jazzy’s aluminium casing with a 'working' cool blue LED won hands down. In term of subjective sonics, Jazzy’s first version (the one with F-ELNA 2.2uF as input caps and total of 690uF electrolytics in power rail and SMDs replaced by Vishay BC 0.1uF and 0.4uF caps and Vishay BC 20K resistors) won. It complemented the HB2 so well that it brought great musicality and tonal colour to music played. As for his version where only the input caps were replaced by Epcos 10uF, I thought it was a little harsh-sounding with sibilance more apparent than all other configurations. All of Jazzy’s variants sounded more powerful especially in the bass region and I attribute this to his excellent choice of Meanwell 13.6V DC SMPS over the fixed 12V DC computer-notebook-styled ones which I myself used. A special mention must be given to Lai’s T-amp (where he only replaced stocked caps with Vishay Roederstein/ERO MKT1813 2.2uF 63V and Panasonic FM 470uF 25V) which is extremely high on the emotion factor with vocals very prominent - female voices sounded so expressive and syrupy.

Jazzy, you took some pictures during yesterday's session. How about posting one or two in the thread?



This post has been edited by Y.C.: Oct 26 2008, 02:38 PM

Yeah....a picture worth a thousand meaning.....


BTW Y.C thank you very much for the effort of having the first ever TT session. Maybe not perfect but I think personally we have fulfill our target to listen to the wonders of this tiny muscle amp together. Hopefully in the second TT session things got better and better with sufficient 'test' equipment.

You are all welcome, the pleasure is really mine.

Jazzy: how is ur preamp going? i am thinking if the preamp could improve the bass performance of t-amp?

any other mod can we do on the t-amp to extract the bass potential?

wui223, I don't think that there's any significant problem with the bass performance of the TA2024 in the first place.

To get better bass, you merely have match it with higher efficiency low frequency drivers.

My HB2s were not the idea speakers to use for exploring the bass capabilities of the T-amp, its bass performance is known to be its weakest feature. But if all you want is bass in quantity, just put the HB2 about 2 feet away into the corners, and it'll rattle all your glass window panes with the TA2024. But then being the ear snobs we are, we have more interest in the bass definition then the volume. That is the main failure of the HB2s - a looseness and poor control in the lower end. This is not the fault of the TA2024.

In our next session, we should try for a pair of full range speakers - some floorstanders, anyone?

Actually i am not basshead also. just feel that the bass is not 'solid'.
btw, i am driving a pair of celestion MP1.

you are not alone.

It's just that I feel that the amp itself has less influence over the bass quality than a well recorded source and the transient ability of the drivers to move air.

1st off, thank you YC and Lai, for being such great hosts yesterday!

the session was most enlightening, the initial Q-Acoustics sound great. the Heyrooks HB2 however exhibits its vocal prowess well when matched with Lai's T-amp. Jazzy's t-amp is the overall champ, though, with the casing having the added flexibility to tweak to the heart's content. wonder if u have bi-amp already by now.

oh yes, Jazzy, is there an adaptor to replace the RCAs in my Boomtube EX so it can connect to speaker binding posts? provided i can open the casing and switch off the Boomtube's bass modules? i can turn the bass volume down, but not sure if the internal circuirty have any filter to bypass the high and low frequency.

---

Added on October 26, 2008, 7:35 pmif u guys have the time tomorrow, would u like to come to my place for another T-amp TT? it's in Putra Heights. there are at least three rooms for u guys to play around, and two sets of Floorstands (Epos M16 and Yamaha NS-555) and two bookshelves (Yamaha NS-333 and Sony mini compo speakers). also one Yamaha AVR and DIY pre+power amps to compare.

would be great if u guys are free to come. drinks and TT will be on me.

i suggested tomorrow is because i will be busy after that. i will be in penang from next friday onwards, coming back only on nov 9th. also because my wife is not around haahaa...

cheers,
wps

This post has been edited by junchoon: Oct 26 2008, 07:35 PM