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Sub woofer for Quad ESL 57s with active crossover
Sub woofer for Quad ESL 57s with active crossover
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Old 10th June 2021, 06:08 PM   #1
JMacI is offline JMacI  United Kingdom
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Smile Sub woofer for Quad ESL 57s with active crossover

I have a pair of stacked quads which I adore refurbished using Sheldon Stokes brilliant book. However my listening room is very large - about 10m x 8m with 4m ceiling so that the lower bass lacks ‘punch’.
I just picked up a pair of old but good B&W 801s and wondered about pursuing an active crossover set up with their enormous drivers.
Has anyone tried anything like that.?
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Old 10th June 2021, 06:40 PM   #2
The Lord Flashheart is offline The Lord Flashheart  United Kingdom
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I run a pair of JL 13w7 with a set of quad ESP63, crossed over actively. Since is cross then over at around 100hz, I find stereo subs a must.

These are far audio drivers but decent ones and in a low tuned ported sub and with plenty of power the reproduce the lowest note of organ music very nicely, much better than any floor-standers I’ve owned.

If you are going to do this, go some purpose designed subwoofers rather than recycled midbasses from the B&Ws.
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Old 10th June 2021, 08:22 PM   #3
Lampie519 is offline Lampie519  Netherlands
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If you have a big room then why not add some more ESL's ;-)
I did... all the way to the ceiling and 80cm in width each.

Last edited by Lampie519; 10th June 2021 at 08:24 PM.
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Old 10th June 2021, 09:17 PM   #4
cyclotronguy is offline cyclotronguy  United States
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Sheldon's TL subs work very very well with stats.
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Old 11th June 2021, 11:10 AM   #5
405man is offline 405man  Scotland
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Quote:
Originally Posted by Lampie519 View Post
If you have a big room then why not add some more ESL's ;-)
I did... all the way to the ceiling and 80cm in width each.
In a room with a 4m ceiling that would take a lot of ESLs and a lot of amplifiers to drive them

Stuart
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Old 11th June 2021, 01:32 PM   #6
lcsaszar is offline lcsaszar  Hungary
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I read somewhere that only dipole bass can be paired well with dipole ESLs.
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Old 11th June 2021, 02:42 PM   #7
mattstat is offline mattstat  United States
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Quote:
Originally Posted by JMacI View Post
I just picked up a pair of old but good B&W 801s and wondered about pursuing an active crossover set up with their enormous drivers.
Has anyone tried anything like that.?
What you're proposing is a less typical approach, so direct experience is a longshot. As the earlier posts suggest, you'll find many different opinions about what subs work well with electrostatics. Ultimately it's your ears that decide if what you want to try is a good idea.

If you like the bass quality and quantity of the 801's in your room, a quick test seems worthwhile. If you already have an extra amp and a cheap way to cross over, I'd suggest starting there. Do an initial test with as little time and money invested as possible.

If you don't have a crossover handy, Harrison Labs FMODs are a cheap and easy way to take care of that. You can get by with a low pass on the 801's and let the ESL's run full range initially.

If you like the sound of the cheap and easy setup, you can always implement a higher quality solution later.
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Old 11th June 2021, 05:48 PM   #8
JMacI is offline JMacI  United Kingdom
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Thats a great suggestion (I didn’t know about the FMODs) thanks. I’m in no immediate hurry to find the best solution and aim to have some fun with experimenting with different set ups. I agree that the only good ‘test’ is my own ears, although even ears need a bit of education sometimes. It was only when I heard ESLs that I discovered the human voice could be reproduced so faithfully. Im also intrigued by the way a good audio setup brings out the best in poorer erslr recordings from the 40s and 50s.
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Old 11th June 2021, 06:21 PM   #9
planet10 is offline planet10  Canada
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Sub woofer for Quad ESL 57s with active crossover
Quote:
Originally Posted by Lampie519 View Post
If you have a big room then why not add some more ESL's ;-)
Sub woofer for Quad ESL 57s with active crossover-demis-triplequadsm-jpg

Any added woofers should be OB.

dave
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File Type: jpg Demis-tripleQuadsm.jpg (70.9 KB, 158 views)
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Old 11th June 2021, 08:12 PM   #10
JohnnoG is online now JohnnoG  United Kingdom
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I own Three Pairs of ESL 57's, of which Two Pairs are in a Stacked Array.
The Bottom of the Lowest Panel is 450mm in Height from the Floor.

I have a New Design for a Frame using a Steel Plate and Plywood to produce a Side Panel.
It has a design to be a Double or Triple array.

In a Triple array the Bottom Panel will lean backwards, it will be mounted out of Vertical Plumb by 200mm (8 Inch).
The Centre Panel will be mounted Vertical.
The Top Panel will lean forwards, it will be out of Vertical Plumb by 200mm (8 inch)

My Diagram shows this will fit into a 2.4mtr (8 foot) in Height Room.

The Excess Piece of wood on the Top and Bottom of the Speaker Frame at the Rear of the Speaker will be drilled to allow the Speakers to be mounted on Cross Bars with a Fastening within the Frame.

Dampers/Isolators will be used to sit the Speaker on, these will be placed between the Speakers Rear Frame and the Cross Bar to see how the coupling affects the sound quality.

I still intend on producing a Ripole Bass to try out, and some other Bass Designs as I have 4 x 15" Eminence Drivers for this role.
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