wow, looks like we have a new sifu in y.c.

Sensitivity rating seems to be missing...
Where do you intend to place the speakers? In a bedroom? Living room?

Mine goes quite loud driving a pair of floorstanders in my small living room

ermmm...im a cable believer

cyl, start with the 4 mention cap and see how it goes im starting my last stage smd changing soon, planing to use it with my pc for the time being, tweeter in car car blown , tannoy have been sitting quiet for a month now...so bad of me


OMG, i have forgotten to rply your pm right? sorry, rarely log in for long now since im busy with family and work, gotten myself part time with HP but on call basis

http://forum.lowyat.net/topic/552509

i believe it is 88desible, enough i say unless you are a disco kaki

Y.C. thx alot for the help

This post has been edited by xtorm: Nov 5 2008, 10:51 PM

Thanks for the reply. Sensitivity at 1M/1W is 88 dB. I just want to put it in my room.

This post has been edited by kww: Nov 5 2008, 11:18 PM

xtorm, thanks for the recommendation. Will order the caps today and hopefully can start the mod by next week
right now, it is still sounding harsh and as advise by Y.C., there will be significant improvement after the first 100hrs burn in...

kww,
The T-Amp should have no problem driving your <no spam links> speakers. Mine is an 89dB

jazzy: Heard that ur buffer preamp is up for running, any picture shots to share ur work? I am still having exam, tmr last paper.

We tend to only examine the sensitivity of loudspeakers (eg. 88 dB/1m/1w) to determine whether a particular amplifier could drive them or otherwise. Sensitivity only tell us how loud the loudspeakers will sound, ie 1 metre in front of them, 1 watt of amplifier power will yield a loudness of 88 decibels but not whether we are getting enough of highs, mid or bass.

We need to also examine whether the loudspeakers present an "easy" or a "difficult" load to amplifiers where we look at their measured impedance. Figures specified in specs, eg. 8 ohms are only the nominal impedances and actual impedances do not remain same at different frequencies. As a general rule, an easy load is one which the impedance is high eg. 8 ohms as opposed to 4 ohms and remain almost constant which does not dip to very low, say 2 ohms. For easy load loudspeakers, amplifiers need not work very hard and reason why low-powered amplifiers would prefer driving 16 ohms loudspeakers.

hi Jazzy,

any chance of that RCA converter to be ready when i am back from Penang? also, what screws are on the Boomtube EX, want to un-assemble it if possible. really curious how it sound on proper speakers.

is there going to be a TT soon? thanks.

cheers,
wps

hey there wui!
Wishing you all the best in your final paper.

Wonder where your got yhe news..
Yes. it is up and running. I need to re-designed the circuit, change a few components values as the default gain is wee bit too high for my liking.. pix and/or report.. I'll think about it ler.. no time for it now. I have not been posting for quite awhile here..

Hi JC,
When will you be back from Penang? (seems like you told me a long time ago.. I have selective memory )
The good part is, I have got all the required hardware ready. I got so engrossed with the buffer pre-amp that I kiv'ed your RCA converter
You're not around, thats why! BUT nothing to it. 1/2 hour is all I need to do it.

There were no mention of any TT Session since we had the last one at your place.. probably they had 'enough'

jazzy: haha, i got special antenna to receive news final exam almost over, but need to brush up alot on my thesis no mood to DIY now...sob sob

junchoon: found any antique hifi stuffs at penang? i saw a turntable on sale at hifi4sale blog, price is affordable but the tonearm is not included.

wui,
just concentrate on your exam/thesis. DIY will always be there waiting
anyway, after listening the T-Amp with the buffer pre-amp, I no longer want to use 'passive' or my current 'active' Yamaha pre-amp!

Oh.. what TT is that? Thorens? Lemme check..

no time for hifi in penang lah, have to jaga father-in-law.

slightly OT here, heard of Stranwood's Artemis? it is a gainclone.

cheers,
wps

I guess this is a company based in Malaysia. It looks cool but the price tag obviously not target local ppl.
This reminds me of jazzy unfinished gainclone project, i myself think of building it long long time ago. Just the transformer hard to locate, unless pay for expensive shipping import from foreign.

weyy.. how come you remembered! As if you knew some development on my side!
Actually I ordered a customised transformer which I will picked up this saturday for my GC project!
Now that the T-Amp project is almost over, time to restart the GC amp project!
Anyway this thread at times almost 'died'..

which chip u use? i am interested to audition it before i start my own. the transformer is too expensive for me, gonna cost 100+. i think urs are not the toroidal type rite? share with us ur progress

Its the LM3886 chip. Got it from JP would you believe!
Yes. Not toroid. Maybe later I'll upgrade it to toroid if the situation warrants so, pending detailed audition against the T-Amp!

How much is the LM3886? i search high and low at JP, i think only find 1 or 2 shops selling but expensive. How much the transformer cost u? i guess u custom wind at JP also rite

I read that LM3875 also good sound. Use point to point wiring if possible, the shorter the distance the nicer the sound, some claims.

This post has been edited by wui223: Nov 6 2008, 10:24 PM

I got it for RM22 each. Its from Darson and I bought the last two!
I think there were LM3875 but I can't be sure.
Yes, its custom wind for a 35V centre tap, 150VA.It's half the price of a toroid. I am also planning the tranny for another bench PSU so it's not a waste if I were to get a toroid later.
I may also use point to point.. but since I'm kinda having a hang of making a PCB.. might take that path too..