x-bzls finished!

coils · 6th August 2004, 05:56 PM

I just finished my x-bzls, which was my first hi-fi diy project. The next phase is a 5 watt x-soz which I have all parts for except some case material, and also a Jt-DAC no. 3 with balanced outs. I checked every thing that I could with a meter, and it all looked good. I have no other balanced equipment, so I connected an unbalanced source and an unbalanced amp.... I was stunned!

I wanted to wait to post this until my project was complete, but I am so ecstatic that I can't see straight. Given all that I have read about unbalanced operation, I was'nt expecting the dramatic improvement in sound quality. Now I will work dilligently to finish the rest of my system.

All of my equipment is low-end consumer. My source is a sony cdp291 and the power amp is a little 20 watt tascam (very gainclone-like). My speakers are Bose bookshelf (PN#?)

This pre-amp has +/- 50 volt rails and has 600 ohm power resistors, 20 uf (2x10uf parallel) output caps and 39 k feedback R. R15 is shorted. It also has 10k input and output attenuators. Also, I used KK boards, as my press-n-peel boards had some trace problems.

A sincere thanks to NP for sharing this work... I can't believe I made this! Here is a link to some pics. Also Thanks to Henrik for making the Simetrix sim files, as I used them to help my component selection.

Any one considering making a bzls, it well worth the effort.
pics

Thad Howard

Vivek · 6th August 2004, 06:02 PM

Neat job mate. The knobs and the case are very good looking too.

steenoe · 6th August 2004, 06:35 PM

That is one cool Preamp. What are those transformers?
If this is your first: Congrats!! Very neat.

You can end up with a first class set of equipment.
Keep it up, and keep posting!!!
Very nice!

Steen.

Alain Dupont · 6th August 2004, 06:55 PM

coils,

Very good job on the enclosure, prefect.

Regards.

Alain.

Dennis Hui · 6th August 2004, 07:11 PM

Very nicely done!

You should submit some pics to the PassDIY gallery.

Cheers,
Dennis

JC Fardo · 6th August 2004, 07:45 PM

First, you said?

What rotary switches did you use?

Thanks for share your impressive job and congratulations

JC

Netlist · 6th August 2004, 08:00 PM

WHooooooooooHoooooooooHooooo

Veeeery nice

/Hugo

metalman · 6th August 2004, 08:18 PM

If you hadn't told us, I'd have said it was your 31st DIY project. Very Nicely done.

vdi_nenna · 6th August 2004, 08:49 PM

Great Work!!

mlloyd1 · 6th August 2004, 08:53 PM

Quote:

Originally posted by metalman
If you hadn't told us, I'd have said it was your 31st DIY project. Very Nicely done.

Indeed! VERY nice job!

So, how DID you do that lettering and artwork on the back?

mlloyd

6th August 2004, 05:56 PM	#1
coils diyAudio Member Join Date: Jan 2004 Location: Los Angeles	x-bzls finished! I just finished my x-bzls, which was my first hi-fi diy project. The next phase is a 5 watt x-soz which I have all parts for except some case material, and also a Jt-DAC no. 3 with balanced outs. I checked every thing that I could with a meter, and it all looked good. I have no other balanced equipment, so I connected an unbalanced source and an unbalanced amp.... I was stunned! I wanted to wait to post this until my project was complete, but I am so ecstatic that I can't see straight. Given all that I have read about unbalanced operation, I was'nt expecting the dramatic improvement in sound quality. Now I will work dilligently to finish the rest of my system. All of my equipment is low-end consumer. My source is a sony cdp291 and the power amp is a little 20 watt tascam (very gainclone-like). My speakers are Bose bookshelf (PN#?) This pre-amp has +/- 50 volt rails and has 600 ohm power resistors, 20 uf (2x10uf parallel) output caps and 39 k feedback R. R15 is shorted. It also has 10k input and output attenuators. Also, I used KK boards, as my press-n-peel boards had some trace problems. A sincere thanks to NP for sharing this work... I can't believe I made this! Here is a link to some pics. Also Thanks to Henrik for making the Simetrix sim files, as I used them to help my component selection. Any one considering making a bzls, it well worth the effort. pics Thad Howard __________________ Coiler

6th August 2004, 06:02 PM	#2
Vivek diyAudio Member Join Date: Nov 2000 Location: Bangalore, India	Neat job mate. The knobs and the case are very good looking too. __________________ Thank God for DIY audio.

6th August 2004, 08:49 PM	#9
vdi_nenna diyAudio Member Join Date: Oct 2000 Location: PA, USA	SWEEET! Great Work!!

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6th August 2004, 06:35 PM	#3
steenoe diyAudio Member Join Date: Mar 2004	That is one cool Preamp. What are those transformers? If this is your first: Congrats!! Very neat. You can end up with a first class set of equipment. Keep it up, and keep posting!!! Very nice! Steen.

6th August 2004, 06:55 PM	#4
Alain Dupont diyAudio Member Join Date: Sep 2003 Location: Paris - France	coils, Very good job on the enclosure, prefect. Regards. Alain.

6th August 2004, 07:11 PM	#5
Dennis Hui diyAudio Member Join Date: Aug 2002 Location: Toronto, Canada	Very nicely done! You should submit some pics to the PassDIY gallery. Cheers, Dennis

6th August 2004, 07:45 PM	#6
JC Fardo diyAudio Member Join Date: Jun 2002 Location: Sao Paulo, SP, Brazil	First, you said? What rotary switches did you use? Thanks for share your impressive job and congratulations JC

6th August 2004, 08:00 PM	#7
Netlist diyAudio Moderator Join Date: Jan 2003	WHooooooooooHoooooooooHooooo Veeeery nice /Hugo

6th August 2004, 08:18 PM	#8
metalman diyAudio Member Join Date: Jun 2003 Location: Calgary, Alberta	If you hadn't told us, I'd have said it was your 31st DIY project. Very Nicely done.

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