Can I use this in an E.B.S.? - diyAudio
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Old 3rd September 2007, 03:18 PM   #1
mikee55 is offline mikee55  United Kingdom
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Default Can I use this in an E.B.S.?

Hello Everybody,
I have a Longmill 10" woofer and found the following spec

Re = 3.6 ohms
Zmax =50.3 ohms
Fs = 27Hz
Qms = 4.3690
Qes = 0.3368
Qts = 0.3127
fc= 77.5hz
Vas = 99.94 L
E.B.P. = 80.1662

At the mo, its in a basic reflex enclosure. I've learnt to build a sealed box and the reflex, now I want to try the Extended Bass Shelf.
Please can you give some pointers.

Cheers

Mike
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Old 3rd September 2007, 03:42 PM   #2
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Any driver that works in a normal vented box you can also use in EBS as EBS is just a vented box made 'oversize' and tuned to suit.

What application is this Mike? In the house?
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Old 3rd September 2007, 03:47 PM   #3
316a is offline 316a  England
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Just run it and it looks good to me Lowish Qts drivers like yours seem to model best with an EBS alignment

cheers

316a
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Old 3rd September 2007, 04:08 PM   #4
mikee55 is offline mikee55  United Kingdom
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Default Hello

Hi Rich,

Got some scrap wood, so thought I'd play whilst waiting to move. I'll stick it in the car, house is a mess at the mo. How big would the box be?

Cheers

Mike
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Old 3rd September 2007, 04:26 PM   #5
GM is offline GM  United States
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Default Re: Hello

Quote:
Originally posted by mikee55
How big would the box be?
Greets!

EBS dates back to when you tuned the cab to ~what we now call Vas when the vent was tuned to Fs, though up to ~0.7*Fs is fine, so ~100 L tuned to as low as ~19 Hz works for me.

GM
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Old 3rd September 2007, 04:29 PM   #6
sreten is offline sreten  United Kingdom
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Hi,

TBH EBS in a car is not box volume friendly.

An EBS type alignment is shown below.

/sreten.
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Old 3rd September 2007, 04:35 PM   #7
sreten is offline sreten  United Kingdom
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Hi,

an even bigger box is needed for a more pronounces shelf.
Not recommended IMO.

/sreten.
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Old 3rd September 2007, 04:43 PM   #8
mikee55 is offline mikee55  United Kingdom
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Default Big

Yeah I aimed for 100l andtuned for 27.Bit too big me thinks

Mike
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Old 3rd September 2007, 06:33 PM   #9
GM is offline GM  United States
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Quote:
Originally posted by sreten
Hi,

an even bigger box is needed for a more pronounces shelf.
Not recommended IMO.

/sreten.
Greets!

Can't comment about your locale, but around here the extended shelf works very well WRT ~mirroring a typical room's gain and ultimate 'bleed off' down very low assuming the driver allows a low enough tuning frequency and has a fairly low Qts. Never built any true subs for cars though, so not sure if this applies to them.

GM
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Old 4th September 2007, 09:19 AM   #10
sreten is offline sreten  United Kingdom
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Quote:
Originally posted by GM


Greets!

Can't comment about your locale, but around here the extended shelf works very well WRT ~mirroring a typical room's gain and ultimate 'bleed off' down very low assuming the driver allows a low enough tuning frequency and has a fairly low Qts. Never built any true subs for cars though, so not sure if this applies to them.

GM

Hi,

not recommended for in car use IMO, half the size and
an amplifier with low bass boost would be better IMO.

/sreten.
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