Author Topic: T-amp Discussion Thread (Read 293196 times)

john5479 · « **Reply #90 on:** Feb 17, 2006 at 01:04 PM »

the monica2 will end up cheaper than the dddac...but to what is better sounding? can't say

D0Hbert · « **Reply #91 on:** Feb 17, 2006 at 09:49 PM »

A bit of an update regarding my correspondence with Yeo, he admits they're on a backlog for both kits, the Charlize and Monica2. I'm trying to negotiate with him, if I can get the kits bare, then I'll assemble them once they arrive, so that it will be much faster than waiting for him to fulfill all pending orders. I'm initially placing an order of 20 kits for Monica2 and Charlize, he was shocked and said he can't supply that many kits as of now. I'll post an update again for any further developments. So far, things aren't looking too rosey. $:-\$

oweidah · « **Reply #92 on:** Feb 17, 2006 at 09:54 PM »

sir d0hbert, thanx for d update. it seems in demand sila charlize at monica. international pantasya

s2kov · « **Reply #93 on:** Feb 18, 2006 at 10:36 AM »

may price na ba for unassembled kit ng monica2?

D0Hbert · « **Reply #94 on:** Feb 20, 2006 at 04:06 PM »

Just an update. Yeo is not willing to give us any discount for the group buy, so selling price is still the same as that listed online. For the monica2, a completely assembled kit is $125, plus freight of $20 (just to be sure), then local tax of 12% of total price, so roughly $196 or around P10,000. For the Charlize, its $90 for the kit, $20 for freight and tax, so it will be around $123 or P6,400. If you're still ok with these prices, please list your name, and the kit/kits you're interested in, so I can consolidate all the orders, and have Yeo commit to us a delivery date. Thanks a lot.

john5479 · « **Reply #95 on:** Feb 20, 2006 at 04:18 PM »

pm sent

oweidah · « **Reply #96 on:** Feb 20, 2006 at 05:46 PM »

sir d0hbert....ygpm.

D0Hbert · « **Reply #97 on:** Feb 20, 2006 at 10:28 PM »

Another update, Yeo just emailed back, still can't commit on a delivery date for the kits because: 1) they don't allow shipment of knocked down units, tapos tayo nalang magbuo para madali, ayaw daw nila ng sakit ng ulo pag di natin mapatakbo, which is understandable naman, 2) they have a big big backlog, so matatagalan pa malamang orders natin. So sabi ko, instead of 20 units each, gawin nalang 10 charlizes and 5 monica2, tapos humingi na ako ng commitment on a date for delivery, wait nalang pag nag-email pabalik. Medyo mahirap syang kausapin, mabait naman, pero dapat 2x nag sesend ng email para sagutin, baka makulitan na sa akin

ding45 · « **Reply #98 on:** Feb 21, 2006 at 10:51 AM »

DOHbert, count me in for an assembled/tested Charlize from Yeo.

Weng! · « **Reply #99 on:** Feb 21, 2006 at 04:08 PM »

anybody have tried this with the t-amp?

T-Amp Partner Review

oweidah · « **Reply #100 on:** Feb 21, 2006 at 04:22 PM »

Quote from: GneW on Feb 21, 2006 at 04:08 PM

anybody have tried this with the t-amp?

T-Amp Partner Review

ako hindi pa

eto yata website nya ->
http://www.audioreplay.net/tc754eb.html

mukhang as the front panel label says..simple phono preamp (so you can attach a TT to the t-amp via the tc754) and three(3) inputs for line level sources (cd tape tuner tv etc)..whether it enhances or degrades the t-amp, ewan.
i think meron similar products ang avesco sa roosevelt ave. /avenida / cubao...QED brand pero 220vac not 12vdc

oweidah · « **Reply #101 on:** Feb 21, 2006 at 04:47 PM »

sirs...you may wana check this out.... http://www.forbes.com/business/global/2005/1003/026A.html

D0Hbert · « **Reply #102 on:** Feb 23, 2006 at 10:23 AM »

I need to finalize all orders for the Charlize and Monica2. According to Yeo, backlog for Monica2 is 1 week, mukhang kaya na ipadala yung Charlize. I need one final headcount for those interested in the kits, after which, I'll PM you my bank account number for the amount to be deposited, then I'll send the money to Yeo via T/T. Thanks.

D0Hbert · « **Reply #103 on:** Feb 23, 2006 at 02:27 PM »

Ok, Yeo's giving us 5 Charlize, which is already assembled. So if I can have your orders and money deposited within the week, much better. So I can do the fund transfer on Monday, then have the kits either on Thursday or Friday. One of the 5 is mine by the way.

Adriane wants 2, ding wants 1, so that leaves 1 more kit up for grabs.

oweidah · « **Reply #104 on:** Feb 23, 2006 at 05:44 PM »

Quote from: D0Hbert on Feb 23, 2006 at 02:27 PM

Adriane wants 2

WOW

si sir hans adriane ba yan? bi-amp charlizeT?! ganda nyan!

D0Hbert · « **Reply #105 on:** Feb 23, 2006 at 06:28 PM »

Hehe, hindi po sya, si john5479 po yun.

oweidah · « **Reply #106 on:** Feb 23, 2006 at 07:30 PM »

hehehe sowee koya

anyways galing nyan gud luck & congrats n adv. - post nyo reviews later

john5479 · « **Reply #107 on:** Feb 24, 2006 at 01:02 AM »

pass muna ako

just for the sake of anyone curious why two? i plan to use an amp for each speaker using 1 channel each so parang monoblock ang dating. Given the relatively low cost I can try this experiment as the amps as you know are bridged, using just one channel is safe and should have less cross-talk interference hence more clear....assuming your speakers are sensitive and revealing enough

but alas i would have to order at a later time...other priorities have to be attended to first

MAtZTER · « **Reply #108 on:** Feb 24, 2006 at 12:34 PM »

Any recommended small - tiny speaker for the T amp with 90+ sensitivity, with decent bass if possible? I just asked a relative to get 2 t amps for me in the U.S.

I have a 89 sensitivity bookshelf but its big & bulky for our small bedroom. I was hoping to have small satellite type speaker to complement my LCD tv.

TIA

shotgun · « **Reply #109 on:** Feb 24, 2006 at 02:46 PM »

Has any tried to repair a T-Amp? After 2 months of use, my left channel isn't working anymore.

D0Hbert · « **Reply #110 on:** Feb 24, 2006 at 03:06 PM »

Try measureing DC Offset at the output/speaker post, both left and right should have some DC voltage in the millivolts range. Next, check for 2.5v from between the input caps since the board is biased at 2.5v. If the voltages are not ok, check continuity between 1) PCB output and speaker binding post 2) PCB and amp input. Refer to TA2024 notes to see which components go to the input and output.

rustyns · « **Reply #111 on:** Feb 28, 2006 at 12:22 PM »

Quote from: shotgun on Feb 24, 2006 at 02:46 PM

Has any tried to repair a T-Amp? After 2 months of use, my left channel isn't working anymore.

Hello shotgun. Is it possible that voltage is too high from your adapter? Was your amp running very hot?

D0Hbert · « **Reply #112 on:** Feb 28, 2006 at 12:34 PM »

If one of the channels is working, nagkaroon ng short somewhere sa side na nasira, pag over voltage kasi, mamamatay yung chip, so both channels dapat sira.

oweidah · « **Reply #113 on:** Feb 28, 2006 at 12:56 PM »

d ba may over-current at over temperature protection ang tripath chip ta2024?

JojoD818 · « **Reply #114 on:** Mar 01, 2006 at 03:08 AM »

baka walang over voltage protection?

oweidah · « **Reply #115 on:** Mar 01, 2006 at 07:25 AM »

Quote from: JojoD818 on Mar 01, 2006 at 03:08 AM

baka walang over voltage protection?

ayun tumbok mo sir jojod818! paano na lang kung wala ka dito? as usual hindi lang very informative and educational ang mga posts mo.
sana may separate and dedicated thread kayo ni sir 2ny para sa aming mga walang alam sa electronics at technical stuff

just wondering...as per this post http://pinoydvd.com/board/index.php?topic=48430.0
sir shotgun sold the t-amp to lordfoo. eh ok naman daw sabi ni lordfoo. ano kaya reason, after two months used hindi na gumana isang channel t-amp kay shotgun pero ok k lordfoo? (baka mas ok ang power supply ginamit ni lordfoo?)

rustyns · « **Reply #116 on:** Mar 01, 2006 at 07:44 AM »

Quote from: oweidah on Mar 01, 2006 at 07:25 AM

ayun tumbok mo sir jojod818! paano na lang kung wala ka dito? as usual hindi lang very informative and educational ang mga posts mo.
sana may separate and dedicated thread kayo ni sir 2ny para sa aming mga walang alam sa electronics at technical stuff

just wondering...as per this post http://pinoydvd.com/board/index.php?topic=48430.0
sir shotgun sold the t-amp to lordfoo. eh ok naman daw sabi ni lordfoo. ano kaya reason, after two months used hindi na gumana isang channel t-amp kay shotgun pero ok k lordfoo? (baka mas ok ang power supply ginamit ni lordfoo?)

Hmmm... In that ad, shotgun said:
"I'll throw in a 1000mAmpere Multi-Volt AC to DC adapter to the package."

So my guess is, lordfoo is using the same power supply?

By the way, is it ok to use this kind of power supply with this amp?

D0Hbert · « **Reply #117 on:** Mar 01, 2006 at 07:55 AM »

Merong over current and overtemperature protection ang mga tripath chips, wala lang over voltage protection. Mahirap sabihin kung anong nangyari until na trouble shoot. Easiest way is do the DC offset check parin to see if buhay yung channel. Di dapat naman baklasin yung amp to do the test, multi tester lang in DC millivolts setting tapos dikit sa speaker output + and - nang side na pinagdududahan. Sayang din para sa seller and swerte din si LordFoo

JojoD818 · « **Reply #118 on:** Mar 01, 2006 at 12:20 PM »

Quote from: oweidah on Mar 01, 2006 at 07:25 AM

ayun tumbok mo sir jojod818! paano na lang kung wala ka dito? as usual hindi lang very informative and educational ang mga posts mo.
sana may separate and dedicated thread kayo ni sir 2ny para sa aming mga walang alam sa electronics at technical stuff

just wondering...as per this post http://pinoydvd.com/board/index.php?topic=48430.0
sir shotgun sold the t-amp to lordfoo. eh ok naman daw sabi ni lordfoo. ano kaya reason, after two months used hindi na gumana isang channel t-amp kay shotgun pero ok k lordfoo? (baka mas ok ang power supply ginamit ni lordfoo?)

in fairness to guys who uses "off the shelf" power supplies, it is the lifeblood of your t-amp, try not to skimp on it just to save a few hundred pesos.

of those psu that I built, so far wala pa naman fried t-amp.

in times of war, it is an advantage to know your enemy - in these case, know your chips! hindi naman siguro tama yun kabit dito kabit dun or upgrade this and upgrade that - and most of all try to figure it out yourself, instead of just reading upgrade reviews.

btw, congrats LorFoo!

D0Hbert · « **Reply #119 on:** Mar 01, 2006 at 05:06 PM »

At 4ohms, RMS power of the amp is 15w (assuming you're comfortable pushing the amp at 10% distortion), that's 30w for both channels, then given the efficiency of the amp, around 80%, that should be be around 36watts maximum, for 12volts input, around 3 amperes should be sufficient. For 8ohm operation, it can be lower, mga 1.5ampere is enough.
Some say its better to have higher amperage for the amp, but then again, there's an issue of benefit gained with anything higher than 3 amperes, mathematically, the load requirement of the amp, used with 4ohms speakers, with 12volts input, and maximum output of 15w (10% distortion) is just 3 ampere, tapos some guy from tripath said 1.5amperes is more than enough for the sonic impact. If you increase voltage from 12volts to 13volts (the maximum as per tripath datasheet), the ampere requirement is reduced to 2.65.
So kanya-kanya yan, but I suggest a quiet PSU section tapos well regulated. Pag bumili kayo ng mga regulated PSU from Raon or Ace Hardware, baklasin nyo, look at the innards, check particularly the filter caps and the regulator used, you can get a general idea of the quality of the PSU. Hope this helps