xtorm/ongbs,
ready for a preliminary report?

The difference is quite subtle...

This first board if you remembered, is bass shy.
There is a shade of improvement in the bass department, especially the mid bass!
Vocal became slightly warmer.. and polished from 'Ssssss'
I think there's a slight roll off on the high frequencies.. not a great loss really, should suit on an overbright system..

End of preliminary report..

Have just completed a 1uH toroid inductor! 1 more to go before more listening test!

This post has been edited by jazzy939: Aug 31 2008, 12:32 AM

I am only mentioning the changes detected. Therefore other factors,refer to my initial review.
So, the soundstage is already great! Separation, wonderful!
Oh.. the T-Amp is dead silent now.. as compared to the second unit.

yes.. no harshness now..

I can certainly try!
Hopefully there's some stocks left. Provided Y.C. did not buy them all!

Yes. Need to compare between the stock inductors and my DIY one..

Dun think I want to do that, but I want to check out both channels, 1uH DIY toroid inductors!

No lah.. I think the value of 10uH is a wee bit too high.
Need to come up between 1 and 10 to 'fine tune'...

Ok lah, for your sake, I'll make another set for both channels! Then will give you full two channels review. Is that great?

you're welcome! will inform in due time!

It's just a 'hobby'..

Yes it does! Isn't that what the prelim. review was all about? Difference between 1uH and 10uH(toroid)?


This post has been edited by jazzy939: Aug 31 2008, 01:08 AM

Agreed. Material is NOT the same.. but that should only afftect the values of the inductance.

I measured the stock inductor, the resistance is also 0.2 ohm! You sure you measured correctly?

I used 2 meters to measure! similar readings!

You measure in circuit or off the circuit board?

Eh? I don't get you 1.30 am liao

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Added on August 31, 2008, 1:31 amoh crap...

i totally forgotten

for really sensitive value, i need to add 1.2ohm....cheapo meter....hahaha

[/quote]

Yes.. thats kinda standard practice before taking resisitance readings..

The donut, which I bought from NIXIE, is 'ferrite ring'.
I made 10uH value.

anything?

Ohreally?

Now burning the 1st. board (remember 1st. patient thingy?) with this 10uH coil.. kinda like it now after 2 hours..
Am playing Sean Ghazi's Semalam.. old song sounding laid back.. very good indeed!

I've also made two 1uH value toroid inductors. Thought wanna replace the stock inductor.. Can't stop the music yet!

I am immune to that avatar oledi..

This post has been edited by jazzy939: Aug 31 2008, 01:48 AM

2? Last nite I hit the sack at 3+

2nd patient cannot! Already been discharged! Well balanced that one.I am going to use 2nd. patient to drive my woofers in the bi-amp config. The force (bass) is strong with this one..

This is another verdict. Using a 10uH inductors is similar to having a 10uF input caps. The overall sounds that is.
Only some little details not quite the same. Small issue eh?

Take it out, bring it on, I am ready!

Yes. This is important! My gut feeling say it will oncertain aspects of the sounds.. need to find it out, right?

Will have to try out air core next!

This post has been edited by jazzy939: Aug 31 2008, 02:05 AM

About 23 turns of a 0.055mm enamelled copper wire
and about 14 for a 1uH inductor.

actually I have already made one!, but NOT happy with the finishes. Need to improve the finished product. Don't have any idea yet..

'recharge'? I am charging now... hehe

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Added on August 31, 2008, 2:31 amFinal for tonite.
The 1uF toroid inductors are IN!
Will burn in till morning after a short audition.. pretty good what I am listening now..

This post has been edited by jazzy939: Aug 31 2008, 02:31 AM

I am comparing both right now!
My verdict? I will replace ALL the stock inductors!

Findings:
midrange and high end got a little sharper. The cymbals sound are sharper with just the right attack/decay.
The stock 1uF input caps connected in series if were to be replaced with higher quality caps will definitely make this one leap to a new level!
The depth got slightly better. Slightly better ambience.

Damn. Hitting the sack at 3 again

From what I heard, yes. Not much but there is.

Yes.. values also affect the output. It is part of a filter, remember?

The value is 0.47uF (C25, C27).
This one I saw being replace with a 220nF yellow coloured caps..

This post has been edited by jazzy939: Aug 31 2008, 03:01 AM

220nF for 4 ohms? Hmmm yeah... I think so too!

Great. We'll keep the 0.47uF then! Bought already!

There's nothing wrong by sticking to the original spec.

Hitting the sacknow xtorm. Have a great day ahead! G'nite!