The world's ugliest Zen - diyAudio
Go Back   Home > Forums > Amplifiers > Pass Labs

Pass Labs This forum is dedicated to Pass Labs discussion.

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
Reply
 
Thread Tools Search this Thread
Old 24th December 2006, 08:47 PM   #1
diyAudio Member
 
aletheian's Avatar
 
Join Date: Apr 2004
Location: Philly
Default The world's ugliest Zen

I wanted to unwind with a simple project, so I pieced together an original Zen from parts i had lying around. The lower mosfet is an IRFP240, and I didn't have any MPSA92, so i used a MPSA56 in the CCS. The psu is 2x 15,000uF CDE caps, and I just used cheapie Illinois caps at the output, and Sprague film at the input.

It turned out really well, much to my surprise. There is a bit of PSU noise on the scope, but not really audible. I blew out some shottkys, so i had to replace them with crappy 6A2's, which are a bit noisy.

The sound is not exactly clear, but i attribute that to the poor capacitors. My test speaker is an Alesis studio monitor with very little bass below 40Hz or so, but the bass was fairly solid... not great, but not bad, and the highs were pretty clear, although a bit grainy... also I suspect, due to the cheap caps.

it was fun, here is a pic of the mess:
Attached Images
File Type: jpg zen.jpg (55.5 KB, 927 views)
__________________
Heghlu'meH QaQ jajvam!
  Reply With Quote
Old 24th December 2006, 09:37 PM   #2
moe29 is offline moe29  United States
diyAudio Member
 
moe29's Avatar
 
Join Date: Dec 2002
Location: Florida
Send a message via AIM to moe29 Send a message via Yahoo to moe29
i hope you're running some fans on those heat sinks!

CLC configuration really helps quiet down the amp.

good goin'!
  Reply With Quote
Old 24th December 2006, 09:54 PM   #3
lineup is offline lineup  Sweden
diyAudio Member
 
lineup's Avatar
 
Join Date: Dec 2005
Location: the north
Default ALETHEIAN band

Hello, man.

It looks not pretty now, that's true
when doing the testing set up of
Your Zen - the original version zen

But what I can see from your little picture
you have got some Real Heavy Stuff:
- Transformer + Electrolytic capacitors.
This is good for a Zen Class A amp - we can not cheat with power supply!

( see my attachment which has some added light - brightness )

I did visit your website.
You are probably playing guitar in that band ALETHEIAN.
What I can hear it is frightening Hard Metal or something like it ...
Aletheian ( lethal = deadly ) released 2 Albums 2005
of which one is a Live DVD.
I did only listen to one myspace song: An Open Grave ..

Keep on testing and figure out some chassis for ZEN.
Then you may upload and add this amplifier to Nelson Pass Gallery
http://passdiy.com/gallery-zen.htm

It is always interesting to spend half an hour in that gallery
every now and then
to see the creative force of all good diy audio builders.

christmas
lineup
Attached Images
File Type: png 061224_zen_1a.png (68.8 KB, 599 views)
__________________
lineup
  Reply With Quote
Old 25th December 2006, 04:06 AM   #4
diyAudio Member
 
aletheian's Avatar
 
Join Date: Apr 2004
Location: Philly
Heh... thanx. I am quite pleased with the results. I built up the Zen with the same mentality that i had when i built my first gainclone and my first single ended triode amp... thinking 'a dozen and a half parts, there is no WAY that a design this simple can actually sound good!' But in each case, I was pleasently surprised. I'll get a case together and get it put away.

And yes, I do play guitar in the band 'Aletheian' and the band 'Becoming the Archrtype'. Progressive death metal... not for the feint of heart, but it pays the bills. Thanx for checking it out though. Consequently, I build all the amps that i play in those bands, and some of the gear that we have recorded with.
__________________
Heghlu'meH QaQ jajvam!
  Reply With Quote
Old 25th December 2006, 04:45 AM   #5
lineup is offline lineup  Sweden
diyAudio Member
 
lineup's Avatar
 
Join Date: Dec 2005
Location: the north
Quote:
Originally posted by aletheian

... I build all the amps that i play in those bands,
and some of the gear that we have recorded with.
Yes, I have seen in your post record,
You have been posting in Neuman U47 topic (top class microphone I think) in Tubes, as well.
And of course other Tube amplifier topics.

And your at it here in Nelson Pass, too.
Guess you wont so easily become a Solid State forum guy, like me, lineup

How can this sound?
Playing on stage / in studio with non-professional amplifiers/gear

Just give me right in one of my thoughts:
A Well Built DIY Amplifier wont be beat easily by PRO Stuff
.... the pro stuff has to be very expensive to do this, in most cases!


christmas
lineup
__________________
lineup
  Reply With Quote
Old 25th December 2006, 06:29 AM   #6
diyAudio Member
 
aletheian's Avatar
 
Join Date: Apr 2004
Location: Philly
Quote:
Originally posted by lineup



Just give me right in one of my thoughts:
A Well Built DIY Amplifier wont be beat easily by PRO Stuff
.... the pro stuff has to be very expensive to do this, in most cases!


christmas
lineup

it depends. The price to performance ratio has a point of diminishing returns... just like HI-FI audio...like when you reach the point of diminishing returns in regard to $1,000 interconnect cables for example.

But you can easily beat out a good portion of the "pro" level stuff out there with well thought out and well tested DIY equiptment. For example, we are in the studio right now recording a new CD. I tried out a half a dozen different amps ranging from $1,000 - $3000 ( i won't mention brand names) with the engineer in the room. Then I plugged in one of my DIY amps, and he said that it was the best sounding amp in the studio, so we are using it on the record.

It is not always the case, but I can say that a decent gainclone sounds better to me than my Samson Servo studio monitor amp. If it is more *accurate* I am not sure... probably not, but it does SOUND better.

Also, part of being PRO level gear is cost... and more often than not, manufacturers will drop down to sub-optimal components, bad layouts, improper adjusting and testing all to cut down on pennies per unit, and R&D time, and to make sure that a competitor does not beat them out with a comperably spec'd unit for less money.

i always say that if I can get 90% of the sound for 10% of the cost, then I am 100% more happy.
__________________
Heghlu'meH QaQ jajvam!
  Reply With Quote
Old 25th December 2006, 07:22 AM   #7
lineup is offline lineup  Sweden
diyAudio Member
 
lineup's Avatar
 
Join Date: Dec 2005
Location: the north
Default Money can beat DIY

as I just said
money can beat DIY

but I also said that
they have to be very expensive to beat
a well designed and built custom DIY circuit

I think you can agree, without too many reservations.

No matter what - a good Pass ZEN is something special
- not necessarily in comparing test figures and thd specs
- but, if to believe many people here, the sound is just great!

christmas
lineup
  Reply With Quote

Reply


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
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
ugliest speaker el`Ol Multi-Way 33 9th May 2007 10:54 AM
I want to see a Pic of the DIY Ugliest Amplifier Project you've ever made. John Biles Solid State 5 28th July 2005 12:46 PM
Ugliest DAC.. but tiny! pixpop Digital Source 22 30th May 2005 02:58 PM
Hello world beanrocco Introductions 1 9th February 2004 08:28 AM


New To Site? Need Help?

All times are GMT. The time now is 01:01 AM.


vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2014 DragonByte Technologies Ltd.
Copyright 1999-2014 diyAudio

Content Relevant URLs by vBSEO 3.3.2