Go Back   Home > Forums > >
Home Forums Rules Articles diyAudio Store Blogs Gallery Wiki Register Donations FAQ Calendar Search Today's Posts Mark Forums Read

Pass Labs This forum is dedicated to Pass Labs discussion.

x-bzls finished!
x-bzls finished!
Please consider donating to help us continue to serve you.

Ads on/off / Custom Title / More PMs / More album space / Advanced printing & mass image saving
Thread Tools Search this Thread
Old 6th August 2004, 05:56 PM   #1
coils is offline coils  United States
diyAudio Member
Join Date: Jan 2004
Location: Los Angeles
Default 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.

Thad Howard
  Reply With Quote
Old 6th August 2004, 06:02 PM   #2
Vivek is offline Vivek  India
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.
  Reply With Quote
Old 6th August 2004, 06:35 PM   #3
steenoe is offline steenoe  Denmark
diyAudio Member
steenoe's Avatar
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!

  Reply With Quote
Old 6th August 2004, 06:55 PM   #4
Alain Dupont is offline Alain Dupont  France
diyAudio Member
Alain Dupont's Avatar
Join Date: Sep 2003
Location: Eysines - France

Very good job on the enclosure, prefect.


  Reply With Quote
Old 6th August 2004, 07:11 PM   #5
Dennis Hui is offline Dennis Hui  Canada
diyAudio Member
Join Date: Aug 2002
Location: Toronto, Canada
x-bzls finished!
Very nicely done!

You should submit some pics to the PassDIY gallery.

  Reply With Quote
Old 6th August 2004, 07:45 PM   #6
JC Fardo is offline JC Fardo  Brazil
diyAudio Member
JC Fardo's Avatar
Join Date: Jun 2002
Location: Sao Paulo - Brazil
First, you said?

What rotary switches did you use?

Thanks for share your impressive job and congratulations

  Reply With Quote
Old 6th August 2004, 08:00 PM   #7
Netlist is offline Netlist  Belgium
diyAudio Moderator Emeritus
Netlist's Avatar
Join Date: Jan 2003

Veeeery nice

  Reply With Quote
Old 6th August 2004, 08:18 PM   #8
metalman is offline metalman  Canada
diyAudio Member
metalman's Avatar
Join Date: Jun 2003
Location: Victoria, BC, Canada
If you hadn't told us, I'd have said it was your 31st DIY project. Very Nicely done.
  Reply With Quote
Old 6th August 2004, 08:49 PM   #9
vdi_nenna is offline vdi_nenna  United States
diyAudio Member
vdi_nenna's Avatar
Join Date: Oct 2000
Location: PA, USA
x-bzls finished! Send a message via Yahoo to vdi_nenna
Thumbs up SWEEET!

Great Work!!
  Reply With Quote
Old 6th August 2004, 08:53 PM   #10
mlloyd1 is offline mlloyd1  United States
diyAudio Member
mlloyd1's Avatar
Join Date: Feb 2001
Location: Northern Iliinois
x-bzls finished!
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?

  Reply With Quote


x-bzls finished!Hide this!Advertise here!
Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
My completed BZLS tomchaoda Pass Labs 3 4th March 2011 04:24 PM
BZLS pre-amp garfieldcat Pass Labs 4 4th July 2005 08:38 AM
How hot is your BZLS ? till Pass Labs 17 12th August 2003 10:34 AM

New To Site? Need Help?

All times are GMT. The time now is 02:23 PM.

Search Engine Optimisation provided by DragonByte SEO (Pro) - vBulletin Mods & Addons Copyright © 2018 DragonByte Technologies Ltd.
Resources saved on this page: MySQL 15.79%
vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2018 DragonByte Technologies Ltd.
Copyright ©1999-2018 diyAudio