How "mono" is your mono power supply? - diyAudio
Go Back   Home > Forums > Amplifiers > Solid State

Solid State Talk all about solid state amplification.

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 6th November 2003, 04:52 PM   #1
diyAudio Member
 
Join Date: Aug 2002
Location: New York, NY
Send a message via AIM to yldouright Send a message via Yahoo to yldouright
Default How "mono" is your mono power supply?

I've noted here that this is a contraversial topic so I'd like the forum members to provide their opinions on where the most benefit is likely to be derived when making a mono channel supply for their amps. Below are five examples which could all be considered "mono" powered amps so pick your favorite and state why you expect an audable difference?

1. Everything separate, even the lines to the outlets.

2. Common delivery but separate transfomers, rectifiers and caps.

3. Common transformer but everything separate after that.

4. Common transformer and double bridge but everything separate after that.

5. Hybrid combination based on greatest bang for the buck.
  Reply With Quote
Old 6th November 2003, 05:50 PM   #2
diyAudio Member
 
JOE DIRT®'s Avatar
 
Join Date: Apr 2003
Location: Brantford, ON
#2 is the true "mono" p/s setup, the rest are improvisations

DIRT®
  Reply With Quote
Old 6th November 2003, 05:55 PM   #3
diyAudio Member
 
Join Date: Aug 2002
Location: New York, NY
Send a message via AIM to yldouright Send a message via Yahoo to yldouright
JOE DIRT

What are the sonic advantages of using two transformers as opposed to one?
  Reply With Quote
Old 6th November 2003, 06:08 PM   #4
diyAudio Member
 
Cradle22's Avatar
 
Join Date: Jan 2003
Location: Dortmund, Germany
Hi!

At least in car-hifi, "true" mono supply designs are being used in order to minimize (that is, get entirely rid of) the influences of one channel of the stereo music signal on the other channel -> stability (for example, if a "strong" bass impulse is only heard on one channel, normally the voltage of that channel would drop a little bit because of the needed power, therefore influencing also the power available to the other channel, but if you use separate supplies, only the voltage of the "demanding" channel would drop, while the other stays "stable").

So far I have not used a "true" mono supply, only what you describe under pt. 3 for my P3A (500 VA toroid, but seperate rectification and smoothing). But I'm a student on low money , so who knows what crazy stuff I would build if I had the money for it... a P3A with 150.000 uF on each rail, built entirely of BG caps...


Bye,

Arndt
__________________
************************
A Sacrifice For Freedom
  Reply With Quote
Old 6th November 2003, 06:12 PM   #5
diyAudio Member
 
Peter Daniel's Avatar
 
Join Date: Jul 2002
Location: Toronto, Canada
Send a message via AIM to Peter Daniel
Quote:
Originally posted by yldouright
JOE DIRT

What are the sonic advantages of using two transformers as opposed to one?
For instance, with GC, I'm noticing better soundststage.
__________________
www.audiosector.com
“Do something really well. See how much time it takes. It might be a product, a work of art, who knows? Then give it away cheaply, just because you feel that it should not cost so much, even if it took a lot of time and expensive materials to make it.” - JC
  Reply With Quote
Old 6th November 2003, 06:21 PM   #6
diyAudio Member
 
Join Date: Aug 2002
Location: New York, NY
Send a message via AIM to yldouright Send a message via Yahoo to yldouright
Cradle22

If the power delivery is the issue, isn't this a function of the size of the transformance as opposed to it being divided?

Peter Daniel

How are you my friend, its been a while and from my reading I can see that you've progressed nicely in your art, Congratulations! Now, is the soundstage improvement better focus or greater size? This is important because what you're hearing may be phase delivery timing issues that appear to increase the soundstage at the expense of resolution.
  Reply With Quote
Old 6th November 2003, 08:50 PM   #7
diyAudio Member
 
Join Date: Aug 2002
Location: New York, NY
Send a message via AIM to yldouright Send a message via Yahoo to yldouright
For the record, I happen to be in Cradle22's camp and believe a single transformer has the potential to sound better than multiple transformers in a mono amp scheme but I'd like a robust discourse to see if my opinions and their logic hold up.
  Reply With Quote
Old 6th November 2003, 09:04 PM   #8
UrSv is offline UrSv  Sweden
diyAudio Member
 
UrSv's Avatar
 
Join Date: Jan 2002
Location: Sweden
Quote:
Originally posted by yldouright
For the record, I happen to be in Cradle22's camp and believe a single transformer has the potential to sound better than multiple transformers in a mono amp scheme but I'd like a robust discourse to see if my opinions and their logic hold up.
Well, that seems like exactly the opposite of what Cradle22 is saying as he says he would build true mono if he had the cash and that in car audio it is used as a desired feature to avoid the same as we have been discussing here and in other threads.
__________________
UrSv
Those who say it can't be done should not stop those who are doing it.
  Reply With Quote
Old 6th November 2003, 09:17 PM   #9
diyAudio Member
 
Join Date: Aug 2002
Location: New York, NY
Send a message via AIM to yldouright Send a message via Yahoo to yldouright
UrSv

Nice to see you here I wanted to address the points you made earlier in this thread. Wouldn't the spike that gets through one transformer also get through another transformer on the same power line? As I understand it, each transformer is also a source of noise and HF hash so do you still maintain that multiple transformers will sound better?
  Reply With Quote
Old 7th November 2003, 07:23 AM   #10
diyAudio Member
 
Join Date: Dec 2001
Location: Earth
i have tried option 2 3 times, even though i assume they are dual mono but sharing mains, a buzzing sound is heard from one side. This doesn't happen if i just connect one side of the amp
(2 monos in one) oppose to the dual mono same chasis and same mains.
Recently i built a real monos-separate chasis and separate trans but sharing the same distribution block for ac mains but 2 power cords are used. i couldnot hear any buzzing at all.
  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
"WTB" 300b Integrated or mono blocks markmelheim Swap Meet 0 19th February 2009 12:20 AM
Mystery "The Fisher" console mono amp yspm Tubes / Valves 1 5th January 2009 11:27 AM
Kofi Annan in: "Seven-Pound Mono Amp" Kofi Annan Tubes / Valves 20 26th November 2006 02:58 AM
How to make a "Y" cable for mono signal? Dogpile Everything Else 1 3rd September 2006 10:20 AM
Dual Mono - Anti Mono Power Supplies pmkap Everything Else 3 16th February 2002 05:10 AM


New To Site? Need Help?

All times are GMT. The time now is 06:35 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