Aleph 3 , Alehp-X - Page 2 - 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 4th August 2005, 05:09 PM   #11
diyAudio Member
 
Join Date: Mar 2003
Location: Barcelona
Hello,

For an universal amplifier of about 60w - 70 w in class TO my the suggestion that I gave him was:

I built a friend and it manages any speaker very well. You go on sure.

http://www.borbelyaudio.com/eb2000342.asp

Ángel
  Reply With Quote
Old 4th August 2005, 08:52 PM   #12
diyAudio Member
 
Join Date: Feb 2001
Location: Columbia, SC
I'm always amused and amazed by how these rumors get started. Either the Aleph or the Aleph-X will do just fine with low-Z loads, assuming sufficient bias.
When I first started the original thread on the Mini-A, just about the first thing people asked was whether it would handle a 4 ohm load. In that case, no, I had not provided enough bias for 4 ohms, although increasing the bias is a pretty simple operation. So when I did the Aleph-X I made sure to boost the current so that it would (almost) handle 4 ohms. If you want more bias still, have at it. Just make sure that you have a robust power supply.

Grey
  Reply With Quote
Old 5th August 2005, 06:22 AM   #13
cowanrg is offline cowanrg  United States
diyAudio Member
 
cowanrg's Avatar
 
Join Date: Apr 2002
Location: Lafayette, CO
Send a message via AIM to cowanrg
i was just speculating, thats all...

as i recall (which could be incorrect), you can make an alephx that can be well suited for 4 ohm loads, but it would be HIGHLY inefficient and produce massive amounts of heat and have a very robust power supply. i just remember its better suited with 8 ohm loads.

just about any amp can be customized to work at different load ratings, some are just more suited for different applications.

im glad you are amused.
  Reply With Quote
Old 5th August 2005, 06:33 PM   #14
diyAudio Member
 
Join Date: Feb 2001
Location: Columbia, SC
Any amp biased heavily enough for a low-Z load is going to be less efficient, regardless of topology, gain devices, etc. The lower the load impedance, the higher the bias required, and the greater the heat generated at idle. If it's not used to produce sound, it goes up as heat, making the amp inefficient. You can't beat physics. All you can do is back off and go class AB or D or something, but then you're changing the rules of the game.

Grey
  Reply With Quote
Old 5th August 2005, 07:02 PM   #15
ctong is offline ctong  United States
diyAudio Member
 
Join Date: Jun 2005
Location: Clemson, South Carolina
An amp becomes inefficient if you want to be able to drive both low and high impedence loads. The efficiencies for low impedence loads can be improved by reducing the rail voltage, but the amp will not be have enough voltage to drive high impedence loads.
__________________
CT
  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
Aleph (Single Ended) + Larvadin (no Memory Distortion) = Ultimate Aleph? tiefbassuebertr Pass Labs 19 25th January 2014 02:15 AM
First version Aleph 0 (Null, ZERO, O, Os, 0s) versus later Aleph versions tiefbassuebertr Pass Labs 13 27th April 2012 02:13 AM
Mini Aleph Board & Aleph 2 Parts List gpsmithii Pass Labs 3 16th January 2010 03:58 AM
PCBs for Aleph 2, Aleph 3, Aleph 4 and Aleph 5 amplifiers kristijan-k Swap Meet 64 12th September 2002 07:55 AM


New To Site? Need Help?

All times are GMT. The time now is 02:20 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