SIMPLE Aleph Pre-amp, - 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 29th September 2009, 04:38 AM   #1
jleaman is offline jleaman  Belgium
Banned
 
Join Date: Apr 2002
Send a message via AIM to jleaman
Default SIMPLE Aleph Pre-amp,

I haven't been around much, been lurking around still reading lots still, but haven't been keeping up with all the pass projects.

My goal, is to find a simple, Pre-Amp for my aleph mini's simple is key so i can still achieve CLEAN sound, but something louder than the Passive pot im using.

I;m running the Mini smd alephs x 4 in se mode ( rca single ended ) 2 amplifiers per speaker, ( one for tweeter one for mid bass )

I am currently working on new cabinets to house my new Ribbon Tweeters ( thanks Planet10 ) and my davis 6.5" efficient drivers.

I only have one source, my fave cd player.

So, ideas schematics pictures are all welcome.

J'
  Reply With Quote
Old 29th September 2009, 02:41 PM   #2
DougL is offline DougL  United States
diyAudio Member
 
Join Date: Feb 2004
Location: Wheaton IL.
Blog Entries: 30
If you plug the CD directly into your power amp is it loud enough? If so, a B1 would help.

If not, I defer the question.

HTH

Doug
__________________
Scienta sine ars nihil est - Science without Art is nothing. (Implies the converse as well)
Mater tua criceta fuit, et pater tuo redoluit bacarum sambucus
  Reply With Quote
Old 29th September 2009, 04:06 PM   #3
Gordy is offline Gordy  United Kingdom
diyAudio Member
 
Join Date: Nov 2006
Quote:
Originally Posted by DougL View Post
If you plug the CD directly into your power amp is it loud enough? If so, a B1 would help.

If not, I defer the question.

HTH

Doug
If your cd player has enough output you may not even need a B1 (/ buffer). I would simply try a 5K potentiometer first.
  Reply With Quote
Old 30th September 2009, 12:26 AM   #4
jleaman is offline jleaman  Belgium
Banned
 
Join Date: Apr 2002
Send a message via AIM to jleaman
Right now i'm using a passive pot for the volume, i do need more maybe 1.5 time gain.
  Reply With Quote
Old 30th September 2009, 12:29 AM   #5
njepitt is offline njepitt  United Kingdom
diyAudio Member
 
Join Date: Aug 2008
Location: Maine
Hi,

If you think the B1 is not sufficient, then you might want to take a look at this thread:

BF862 Preamp

It's high on my list of things I want to make soon....

Cheers

Nigel
  Reply With Quote
Old 30th September 2009, 12:30 AM   #6
njepitt is offline njepitt  United Kingdom
diyAudio Member
 
Join Date: Aug 2008
Location: Maine
Our posts crossed... The preamp in the link I posted has a gain of 2, if I recall correctly.

Nigel
  Reply With Quote
Old 30th September 2009, 07:44 AM   #7
diyAudio Member
 
Join Date: Sep 2005
Would it be possible to reduce the feedback of your Aleph's?

A simple mod if you enjoy your setup.
  Reply With Quote
Old 30th September 2009, 05:45 PM   #8
juma is offline juma  Serbia
diyAudio Member
 
juma's Avatar
 
Join Date: Nov 2005
Location: Zemun
Quote:
Originally Posted by njepitt View Post
Hi,

If you think the B1 is not sufficient, then you might want to take a look at this thread:

BF862 Preamp

It's high on my list of things I want to make soon....

Cheers

Nigel
In the meantime, schematic changed:
http://www.diyaudio.com/forums/pass-labs/146310-bf862-preamp-post1938342.html
  Reply With Quote
Old 30th September 2009, 10:03 PM   #9
DougL is offline DougL  United States
diyAudio Member
 
Join Date: Feb 2004
Location: Wheaton IL.
Blog Entries: 30
Quote:
Originally Posted by jleaman View Post
Right now i'm using a passive pot for the volume, i do need more maybe 1.5 time gain.
I suggested removing the passive pot. It may be loading down the CD output. If its loud enough direct connected, a buffer would help, by allowing a higher value pot without loosing HF response or volume.
Try it and let us know.

Doug
__________________
Scienta sine ars nihil est - Science without Art is nothing. (Implies the converse as well)
Mater tua criceta fuit, et pater tuo redoluit bacarum sambucus
  Reply With Quote
Old 30th September 2009, 11:41 PM   #10
jleaman is offline jleaman  Belgium
Banned
 
Join Date: Apr 2002
Send a message via AIM to jleaman
Quote:
Originally Posted by DougL View Post
I suggested removing the passive pot. It may be loading down the CD output. If its loud enough direct connected, a buffer would help, by allowing a higher value pot without loosing HF response or volume.
Try it and let us know.

Doug
I tried that long time ago, It defiantly needs more gain,
  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
Simple, SIMPLE Digital volume control -_nando-_ Digital Source 5 21st December 2006 01:20 PM
A simple question for the Aleph 3 owners JEKYLL Pass Labs 6 24th May 2004 07:59 PM
Simple answer required for a simple question... rabbitz Multi-Way 4 31st August 2003 10:05 AM
Simple Aleph 2 transformer question BrianGT Pass Labs 14 7th April 2002 10:27 PM
Aleph P 1.7 more simple in progress Miles Teg Pass Labs 0 28th September 2001 08:30 PM


New To Site? Need Help?

All times are GMT. The time now is 07:16 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