Can I use this driver for a sub ??

jim · 28th November 2005, 03:16 PM

Hi,

I have two DAVIS 20MP8 woofers with following data :

Fs 37,5
Qes 0,40
Qms 4,11
Qts 0,36
Vas 58,0
Re 6,25
Le ...
Sd 210
Xmax 3,5
Pe 60

Can I use these for an active sub for home cinema use, with both units in one enclosure ?
How big should the enclosure be, any guidelines ?

Thanks in advance

richie00boy · 28th November 2005, 03:31 PM

I'm guessing from the specs and model number that they are 8 inch units. They aren't really all that great for a sub but if you don't want loud or deep they might be ok for a budget job in a small room.

wingman · 29th November 2005, 06:21 AM

Xmax 3,5 =

3,5mm is not much

Volenti · 29th November 2005, 12:57 PM

100L enclosure, vent 104mm dia (standard pvc pipe size) by 113mm long, Fb=35hz.

However the limited X-max (assuming it's accurate) severly limits powerhandling in this design to around 25w per driver.

On the up side it will be very efficient, so you should be able to get away with the lower power handling.

alfa147 · 30th November 2005, 12:54 AM

it's not good for subwoofer

jim · 30th November 2005, 11:04 AM

OK,

Thanks all,
So I think I'll use them in a normal BR-enclosure, maybe together with a FOSTEX FE103.
Any tips for this config ?

Anyway,
Thanks for your help

28th November 2005, 03:16 PM	#1
jim diyAudio Member Join Date: Jan 2002 Location: Leopoldsburg - Belgium	Can I use this driver for a sub ?? Hi, I have two DAVIS 20MP8 woofers with following data : Fs 37,5 Qes 0,40 Qms 4,11 Qts 0,36 Vas 58,0 Re 6,25 Le ... Sd 210 Xmax 3,5 Pe 60 Can I use these for an active sub for home cinema use, with both units in one enclosure ? How big should the enclosure be, any guidelines ? Thanks in advance

28th November 2005, 03:31 PM	#2
richie00boy Did it Himself diyAudio Member Join Date: Nov 2003 Location: Gloucestershire, England, UK	I'm guessing from the specs and model number that they are 8 inch units. They aren't really all that great for a sub but if you don't want loud or deep they might be ok for a budget job in a small room. __________________ www.readresearch.co.uk my website for UK diy audio people - designs, PCBs, kits and more

29th November 2005, 06:21 AM	#3
wingman diyAudio Member Join Date: Jan 2004 Location: jylland	Xmax 3,5 = 3,5mm is not much __________________ bass is also audio

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29th November 2005, 12:57 PM	#4
Volenti diyAudio Member Join Date: Aug 2003 Location: Australia	100L enclosure, vent 104mm dia (standard pvc pipe size) by 113mm long, Fb=35hz. However the limited X-max (assuming it's accurate) severly limits powerhandling in this design to around 25w per driver. On the up side it will be very efficient, so you should be able to get away with the lower power handling.

30th November 2005, 12:54 AM	#5
alfa147 diyAudio Member Join Date: Nov 2005 Location: istanbul	it's not good for subwoofer

30th November 2005, 11:04 AM	#6
jim diyAudio Member Join Date: Jan 2002 Location: Leopoldsburg - Belgium	OK, Thanks all, So I think I'll use them in a normal BR-enclosure, maybe together with a FOSTEX FE103. Any tips for this config ? Anyway, Thanks for your help

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