Alpeh 5 - minimum speaker impedance load? - 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 1st February 2012, 10:15 AM   #1
diyAudio Member
 
Join Date: May 2002
Location: oz
Default Alpeh 5 - minimum speaker impedance load?

Hi All
I'm trying to find some clarification on the minimum load an Aleph 5 can drive.
The scenario is this , I have just completed some new ribbon speakers (26" x1") which are currently being driven by my Aleph 5 via an impedence matching transformer from apprx 500hz up (DCX2496 crossover)

Whilst it sounds great (brilliant actually!) I cant help but wonder what it would be like to direct drive the ribbon.

In this case I would like to try substituting a resistor for the transformer and wonder how low I should go in resistance.
(8 ohm resistor works but very low volume compared to the transformer..)


So should i try 1 , or 3 ohms or so , hopefully also avoiding any possible damage to the aleph output stage...

or.........


will the upcoming F5 turbo be able to drive such beasts directly.?

Any comments appreciated

Thanks in advance.
__________________
george a
  Reply With Quote
Old 3rd February 2012, 10:07 AM   #2
diyAudio Member
 
Join Date: May 2002
Location: oz
Anybody?? please ?
__________________
george a
  Reply With Quote
Old 3rd February 2012, 10:27 AM   #3
Zen Mod is offline Zen Mod  Serbia
diyAudio Member
 
Zen Mod's Avatar
 
Join Date: Jan 2003
Location: ancient Batsch , behind Iron Curtain
decreased power of Aleph will be issue much earlier than jeopardy of damage it with low load

even in the case of short on output - Aleph will survive , 'till thermal breakdown .......... significantly later

you can always try some big honkin' 110/220 autoformer , connected appropriately

you can search for experience of ppl using so called Zero-xformers (mostly guys with OTL tube amps)
__________________
my Papa is smarter than your Nelson !
clean thread; Cook Book;PSM LS Cook Book;Baby DiyA ;Mighty ZM's Bloggg;Papatreasure;Papa...© by Mighty ZM
  Reply With Quote
Old 5th February 2012, 12:17 AM   #4
a.wayne is offline a.wayne  United States
Sin Bin
 
Join Date: May 2008
Location: Front Row Center
Quote:
Originally Posted by george a View Post
Hi All
I'm trying to find some clarification on the minimum load an Aleph 5 can drive.
The scenario is this , I have just completed some new ribbon speakers (26" x1") which are currently being driven by my Aleph 5 via an impedence matching transformer from apprx 500hz up (DCX2496 crossover)

Whilst it sounds great (brilliant actually!) I cant help but wonder what it would be like to direct drive the ribbon.

In this case I would like to try substituting a resistor for the transformer and wonder how low I should go in resistance.
(8 ohm resistor works but very low volume compared to the transformer..)


So should i try 1 , or 3 ohms or so , hopefully also avoiding any possible damage to the aleph output stage...

or.........


will the upcoming F5 turbo be able to drive such beasts directly.?

Any comments appreciated

Thanks in advance.
Anything over 1 ohm will kill the dynamics , anything below 3 may kill the amp


Use 1 ohm .......................
  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
LF55 & NAKSA70 and low impedance speaker load supernet AKSA 4 17th January 2012 03:21 AM
minimum load impedance for DIY opamp F1 FAN Pass Labs 2 15th September 2009 02:21 AM
Dynamic load line analysis using music and speaker load Michael Koster Tubes / Valves 0 7th March 2008 08:47 PM
Calculate minimum load current of choke? pchw Tubes / Valves 2 29th October 2007 06:55 AM
Input impedance on Alpeh kasra Pass Labs 2 27th February 2002 08:14 AM


New To Site? Need Help?

All times are GMT. The time now is 02:18 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