Go Back   Home > Forums > >
Home Forums Rules Articles diyAudio Store Blogs Gallery Wiki Register Donations FAQ Calendar Search Today's Posts Mark Forums Read

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

Powering LS3/5
Powering LS3/5
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 18th February 2018, 01:55 PM   #1
argonrepublic is offline argonrepublic  Canada
diyAudio Member
 
Join Date: Apr 2005
Location: Simcoe Ont
Default Powering LS3/5

I have a pair of LS3/5. I am currently running them with the bass ( base ) units from Kef 105/2. The Ls3/5 still have their crossover as does the Kef 105 woofers. I have the them additionally separated by an older automotive active crossover> I must say, I am really loving it. but I'll bet I haven't even scratched the surface. The LS3/5 are being driven by a Pioneer SA-7700 the woofers are running off a Realistic STA-2000D.
I was reading and discovered that these LS3/5 do well with 35 Watts RMS and apparently EL34s work well with them.

Any advice of clarification on this would be greatly appreciated. I was always under the impression that as nice as tubes can be, they can also be muddy, slow, sluggish. If this is incorrect, how would i go about getting amp the has balanced inputs, no attenuationa or controls are needed. I'd be feeding in direct from a dad with +4 Balanced outs. Hoping to run consistently at 85 db @ 1 meter and occasionally crank it up a bit for 3 or 4 minutes.
  Reply With Quote
Old 18th February 2018, 03:17 PM   #2
Eli Duttman is offline Eli Duttman  United States
diyAudio Member
 
Join Date: Apr 2004
Location: Monroe Township, NJ
There are several LS3/5 variations. What is the nominal impedance of your pair?

30+ WPC can be obtained from EL34/6CA7/KT77 bunch, 7591s, and the 6L6GC/7581 group. KT88s will give you more power.

Muddy, slow, and sluggish? Not if correctly handled.

The requisite magnetics ("iron") make tube amps more costly than SS. What sort of budget do you have in mind? Given current realities, Hammond's 1650PA O/P trafo and a variation on The H/K Cit. 5 setup, with 6L6GC O/P tubes, is a reasonable possibility. The Cit. 5 is a superior implementation of what is known as Mullard style circuitry. Mullard style is "idiot resistant" and works well with so/so "iron", like Hammond's.

The 12BY7 used by H/K is getting scarce and is (IMO) best saved for already existing units. I've provided a 6922 cascode that will quite adequately replace the pentode.
Attached Images
File Type: gif Citation-V-full-final.gif (273.3 KB, 56 views)
File Type: jpeg Cascode 6922 Mullard Front End.jpeg (636.5 KB, 59 views)
__________________
Eli D.
  Reply With Quote

Reply


Powering LS3/5Hide 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

Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
CDJ 400 - not powering up dazzler22 Digital Source 9 19th May 2014 12:14 PM
Next Q24 not powering up ransaahi Car Audio 8 6th September 2012 06:38 AM
Next Q24 not powering up ransaahi Car Audio 0 3rd May 2012 11:23 AM
Powering a fan for amp Buzzy Parts 8 9th September 2008 01:35 AM
Powering a car amp soundNERD Car Audio 14 29th June 2005 03:40 AM


New To Site? Need Help?

All times are GMT. The time now is 03:49 PM.


Search Engine Optimisation provided by DragonByte SEO (Pro) - vBulletin Mods & Addons Copyright © 2018 DragonByte Technologies Ltd.
Resources saved on this page: MySQL 14.29%
vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2018 DragonByte Technologies Ltd.
Copyright ©1999-2018 diyAudio
Wiki