How to make a small, very effective, no coloration, phase inverter for signal? - diyAudio
Go Back   Home > Forums > Source & Line > Digital Source

Digital Source Digital Players and Recorders: CD , SACD , Tape, Memory Card, etc.

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 7th March 2008, 03:05 AM   #1
diyAudio Member
 
Join Date: Nov 2005
Default How to make a small, very effective, no coloration, phase inverter for signal?

Well is there a way to do this? My Squeezebox 3 requires phase inversion of the speakers. However my CD, Vinyl, AUX, whatever, does not. As I understand only digital can do this... I am wondering if there is some way to do it without ruining the nice signal of my modded Squeezebox 3.

I have a pre-amp that is passive except it has a Hagtech Bugle and power supply in it for the vinyl, with a pot for that too. Volume is controlled via the Squeezebox 3 for itself.
  Reply With Quote
Old 7th March 2008, 07:10 AM   #2
Mooly is online now Mooly  United Kingdom
diyAudio Moderator
 
Mooly's Avatar
 
Join Date: Sep 2007
Hi, Sorry to have to ask but whats a "Squeezebox 3" ?
Try swapping the polarity of the speaker leads over first and listen if you can tell a difference. A single opamp will invert phase and can be configured to invert or not at the throw of a switch.
Regards Karl
  Reply With Quote
Old 7th March 2008, 11:12 AM   #3
waltona is offline waltona  United Kingdom
diyAudio Member
 
Join Date: Apr 2005
Location: Up North
I think that the INGUZ DRC plugin will sort this out.

http://inguzaudio.com/

Apart from DRC and an equalizer, it will reverse the phase automatically.

The slimdevices forum will have a lot more info than I can give you on this!

EDIT: Just checked with somebody who knows what he is on about and...

there is a DRC filter that Inguz prepared that inverts polarity.
You will have to get the filter from Inguz (not sure it is included in the download anymore) then select it from the settings.

Hope that helps.
  Reply With Quote
Old 7th March 2008, 09:42 PM   #4
Banned
 
Join Date: Jan 2008
Blog Entries: 2
It's an Ethernet audio sreamer.

What's wrong with swapping the wires? You could just have a crossover patch cable in the interconnect if there's a wire you don't want to cut.

w
  Reply With Quote
Old 8th March 2008, 04:02 AM   #5
diyAudio Member
 
Join Date: Nov 2005
Swapping the wires every time I change sources sucks.

Thanks for the suggestions. I will try the Slimserver forums!
  Reply With Quote
Old 8th March 2008, 01:41 PM   #6
Archwn is offline Archwn  United Kingdom
diyAudio Member
 
Join Date: Oct 2006
Would you consider 2-way toggle switch? Wire it properly and it could fix the problem.
  Reply With Quote
Old 8th March 2008, 04:11 PM   #7
diyAudio Member
 
Steve Eddy's Avatar
 
Join Date: Sep 2002
Location: Sacramento, CA
Polarity on recordings is all over the road. Some preserve absolute polarity, some do not. Others may have mixed polarities and all of this can occur in various combinations on different cuts off the same album.

So, unless you listen to every cut on every album to find out which polarity sounds best to you and make note of it so you can switch to that polarity when playing that cut, what's the point of worrying about your Squeezebox inverting polarity?

It's probably about as likely to be "correct" for a given cut than if it didn't invert polarity.

se
  Reply With Quote
Old 9th March 2008, 07:31 AM   #8
diyAudio Member
 
Join Date: Oct 2004
I've bitten my tongue on this facet of audio for years.
Can you really tell any difference if a signal is inverted or not?
Really?

I would have thought there'd be so much more you could do to improve a system before you start to worry if the signal is inverted.

Even if you do preserve the correct 'phase' (or lack of inversion really), some speaker crossovers invert the signal to the tweeter anyway, to help the phase response in the crossover region - and of course the phase response itself completely changes through the crossover. Considering all that, whether the IMHO inaudible inversion is present or not would be the least of my worries.

But seriously, that's my opinion. What experiences have others had?
  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
Quick way to make an effective phase plug ashok Multi-Way 6 4th December 2007 08:50 PM
Phase inverter ThSpeakerDude88 Tubes / Valves 37 29th August 2007 03:15 PM
Signal inverter for radio project malfoye Chip Amps 0 28th November 2006 06:47 AM
Mystery (to me) phase inverter? porkchop61 Tubes / Valves 17 6th October 2004 11:16 AM


New To Site? Need Help?

All times are GMT. The time now is 06:39 PM.


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