Stereo bass problem - diyAudio
Go Back   Home > Forums > Amplifiers > Tubes / Valves

Tubes / Valves All about our sweet vacuum tubes :) Threads about Musical Instrument Amps of all kinds should be in the Instruments & Amps forum

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 17th May 2009, 08:59 PM   #1
diyAudio Member
 
Join Date: May 2009
Question Stereo bass problem

Hi guys
Well im new here so say if im doing something wrong.

I have a little problem. Recently finished designing a tube amp, built one monoblock, worked perfectly (for my taste), build a second one, worked the same. But as i connect them both to the power supply at once, bass at lower frequencies dissapears.

Is that a design problem?

A power supply problem?

Or some other issue?

Greatly apreciate your help. Should i post the schematic?
  Reply With Quote
Old 17th May 2009, 09:16 PM   #2
diyAudio Member
 
astouffer's Avatar
 
Join Date: Jun 2004
Location: Pittsburgh, crumbling wasteland
Its difficult to say without more details but my advice is to poke around with a meter and see how the voltages compare when one amp is connected or when both are connected.
  Reply With Quote
Old 17th May 2009, 09:16 PM   #3
kevinkr is offline kevinkr  United States
diyAudio Moderator
 
kevinkr's Avatar
 
Join Date: Sep 2004
Location: Boston, Massachusetts
Blog Entries: 6
More details are needed. Are you sure that your woofers are phased correctly and that you have not swapped connections on the output transformer of one amp relative to the other?

Are these PP amps or SE and do they use global negative feedback or not?
__________________
"Extraordinary claims require extraordinary evidence." - Carl Sagan
  Reply With Quote
Old 18th May 2009, 04:01 PM   #4
diyAudio Member
 
Join Date: May 2009
So thats why speakers have red and black wires. I rephased one of the speakers and its all fine now.

By the way it's a two SE monoblock amp (6n1p, 6p14p) all made of ex-soviet parts.

Thanks for your help. Got to keep in mind that phasing is essential.
  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
Stereo or 2.1 - Which produces better bass punch? xitronics Solid State 31 2nd August 2009 09:31 PM
Summing a stereo signal to mono for bass... MikeHunt79 Subwoofers 1 16th January 2008 09:48 PM
LM3886 Stereo Amplifier problem Razbi Chip Amps 8 10th October 2006 01:01 PM
dipole stereo bass? xstephanx Subwoofers 63 1st June 2006 12:19 PM
stereo bass query. tade Subwoofers 3 23rd February 2006 04:39 PM


New To Site? Need Help?

All times are GMT. The time now is 02:59 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