Best way to highest efficiency? - diyAudio
Go Back   Home > Forums > Loudspeakers > Full Range
Home Forums Rules Articles diyAudio Store Gallery Wiki Blogs Register Donations FAQ Calendar Search Today's Posts Mark Forums Read

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
Thread Tools Search this Thread
Old 24th January 2011, 06:48 PM   #1
Carlp is offline Carlp  United States
diyAudio Member
Join Date: May 2006
Location: A New England
Default Best way to highest efficiency?

I know this is a wide open question with room for lots of opinions, but I'm looking for just a few basic ideas with a dash of theory thrown in. I've recently become a fan of single-driver/full range but worry that to get high spl, I'd need a much fatter bank account. Also, multi-way isn't out of the question, particularly in line arrays, but there doesn't seem to be a forum for questions that potentially cross topics like mine.

I'm working out my first tube amp design (lots of reading and building practice, but I'm slow at the theory) and it will have a very low output signal. I'm still working out the design, so can't give any particulars yet. What I want to do is find a good design that balances quality, cost and efficiency. I'm guessing I will need 105dB sensitivity or more, though that's truly a guess. I'm not trying to fill a concert hall though, just a small (13x15 ft or so) living room.

I'm happy to do the grunt work of design, layout, etc., but what I'm looking for is input on what direction to go. Line Array? OB? Full range? Bipole/Dipole? Some hybrid or a combination? I've mostly been reading about line arrays and dipole and bipole variations of line arrays (full range and multi), but am not yet convinced to spend time on one.

Thanks a ton, and sorry for the basic and open-ended question.
  Reply With Quote
Old 24th January 2011, 10:32 PM   #2
diyAudio Member
Godzilla's Avatar
Join Date: Nov 2005
Location: New York
Large, efficient drivers.
  Reply With Quote
Old 24th January 2011, 10:42 PM   #3
tinitus is offline tinitus  Europe
diyAudio Moderator R.I.P.
Join Date: Nov 2005
active 3way with "pro" drivers would my choise
  Reply With Quote
Old 24th January 2011, 11:30 PM   #4
GM is offline GM  United States
diyAudio Member
GM's Avatar
Join Date: Jun 2003
Location: Chamblee, Ga.
Originally Posted by Carlp View Post
I'm guessing I will need 105dB sensitivity or more, though that's truly a guess. I'm not trying to fill a concert hall though, just a small (13x15 ft or so) living room.
My current system bests this a little, so dual HE 15" in ~20 ft^3 tuned to Fs plus 300-500 Hz compression horn, preferably corner loaded, though with flea power you still won't get to piano bar levels at low distortion.

Loud is Beautiful if it's Clean! As always though, the usual disclaimers apply to this post's contents.
  Reply With Quote
Old 24th January 2011, 11:52 PM   #5
Carlp is offline Carlp  United States
diyAudio Member
Join Date: May 2006
Location: A New England
I should probably have mentioned that there are some VERY inexpensive 2-4" drivers at PE (for instance Newcom QS760 Passive Speaker Pair |, which I've read someone did a line array), Madisound and elsewhere (my local electronics warehouse sometimes has great deals on lots that are fine but were mis-ordered or spec'd, e.g. a recent lot of 6" woofers that seem to run quite nicely and were dirt cheap). So a line array doesn't need to be out of the question just because of the number of drivers.

Godzilla, got any specific recommendations? I have a pair of BOFU drivers and I know you've experimented with them. I assume you mean BIGGER!

Tinitus, I don't know of any drivers, pro or otherwise, that would meet my criteria. I'd be grateful for suggestions.

GM, sounds intriguing. I can look into this, but wonder about "piano bar" levels. I don't need live performance levels, but decent upper register and fast response would be helpful.

Thanks all.
  Reply With Quote
Old 24th January 2011, 11:58 PM   #6
49 - for the 19th time!!!
diyAudio Member
c2cthomas's Avatar
Join Date: Oct 2006
Location: Near "Music City" (Nashville Tennessee)
Check this thread out S16 - Constant Directivity Dipoles
DIY audio can be expensive but getting to see things go up in smoke - that's priceless!!!! ..... "whatever - call it brainfart of Mighty ZM"

Last edited by c2cthomas; 25th January 2011 at 12:01 AM.
  Reply With Quote
Old 25th January 2011, 12:03 AM   #7
ra7 is offline ra7  United States
diyAudio Member
Join Date: Feb 2009
Funny you should mention this - my thoughts lately have been leaning towards high efficiency also. I think you will lots of folks here with big all horn systems that enjoy extremely high efficiency.

There seem to be lots of ways to get there. Compression drivers and horns, bass horns, subwoofer horns... horns horns horns. Line array is another option. Size matters and so, having enough space is probably a good start.

For me, more than being able to produce live levels, high efficiency is about getting that 'real' palpable quality in the reproduced music.

Following this thread intently.
  Reply With Quote
Old 25th January 2011, 12:18 AM   #8
diyAudio Member
Join Date: Jan 2002
Location: Tyrone Ga. U.S.A.
There is even a forum just for this.

High Efficiency Speaker Asylum
  Reply With Quote
Old 25th January 2011, 12:26 AM   #9
diyAudio Member
Join Date: Sep 2009
Efficiency? Go big, or go home.
  Reply With Quote
Old 25th January 2011, 02:05 AM   #10
Bigun is offline Bigun  Canada
diyAudio Member
Bigun's Avatar
Join Date: Jan 2009
Location: Waterloo, ON or Herefordshire
Blog Entries: 2
Well now, I'll offer a completely different suggestion - just because...

I built my first tube amp last year, a SET with a gain of 1.8 and maybe a good solid 1W output.

I have plans for big speakers - but it's plenty of work and some expense and I'd suggest a smaller simpler project first.

Believe it or not, and I wouldn't have if not for having done the experiment myself - a very small inefficient speaker does work with a low power SET. I am currently using a pair of 85dB inefficient speakers with my SET until I get around to building something larger. The sound is fine in a fairly generous room for easy listening so long as the kids are not around.

The sound quality is fantastic - a long time tube fanatic friend of mine was gobsmacked.

So maybe you want to try something simple and inexpensive to get your hands dirty before you get the big driver and build that perfect BLH.
"The test of the machine is the satisfaction it gives you. There isn't any other test. If the machine produces tranquility it's right. If it disturbs you it's wrong until either the machine or your mind is changed." Robert M Pirsig.
  Reply With Quote


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
Worlds expensivest highest Efficiency '15 woofer: Goto SG38WN Series up to 110db/W/m tiefbassuebertr Multi-Way 27 15th September 2015 08:50 PM
What is the highest ohm speaker? nige838 Full Range 8 21st October 2010 09:15 AM
The highest quality ouput ? onis_uk PC Based 23 15th April 2010 11:38 AM
highest Sensitivity subs Amit_112dB Subwoofers 14 30th July 2007 01:59 PM
Highest Quality 2-way amirmk Multi-Way 52 23rd August 2005 10:01 PM

New To Site? Need Help?

All times are GMT. The time now is 02:35 PM.

vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2017 DragonByte Technologies Ltd.
Copyright 1999-2017 diyAudio

Content Relevant URLs by vBSEO 3.3.2