diy subwoofer

miso · 30th October 2009, 11:20 AM

Hello everyone

I have simple 2A3 amp with Lowther EX2 Fidelio cabinet.
I want to build subwoofer to match Lowthers but there is so many options
any info will help

thanks Miso

AndrewT · 30th October 2009, 12:15 PM

the Lowther is very efficient.
It will be impossible to achieve low frequency bass from a driver that can get close to the sensitivity of the Lowther.

If you cut the LF requirement then high efficiency mid bass drivers can get near there.
If you need bass extension then you must use much lower sensitivity drivers and they will demand much higher drive voltages.

chris661 · 30th October 2009, 02:34 PM

What he said.

Some Pro drivers horn loaded would come close (I think), but the extension wouldn't be brilliant.

How much power do you have on tap to work with? If it's not much, you'll be looking at some kind of horn, with more power, you can make the build simpler and use less efficient drivers.

Highef · 30th October 2009, 03:31 PM

What is the problem to match efficiency?
If a crossover is used to filter the low-freq and use a specific amplifier for the sub, the efficiency would not be a problem.

regards
Highef

miso · 30th October 2009, 07:00 PM

thanks to all
my problem is that I can"t find on internet something will match Lowthers
So question are
-anyone have expirience
-should I tray with something like full range horn with passive cross
-full range bass reflex with active cross and strong amp
Untill now I tray few subs from market but all of them was budget subs and result was

I must to mention that 2A3 have only few wats if I go passive

regards

bjorno · 30th October 2009, 09:24 PM

Quote:

Originally Posted by miso

..my problem is that I can"t find on internet something will match Lowthers..

Hi,

FYI,A single 105 L T-TQWT using a 15” Ciare 15.00SW will probably SPL match your Lowther speakers if placed close to a wall, near a corner using about equal input power level.

b

audiojoy · 31st October 2009, 04:03 AM

I have electrostatics and dipole open baffle subwoofes with a behringer electronic subwoofer and a 400w power amp keeps up in 'speed' and adds depth with total cohesiveness when correctly dialled in.

Brett · 31st October 2009, 09:33 PM

Biamp and go active with the sub, then power need not be an issue or the performance of the system dictated by a tiny amp.

30th October 2009, 11:20 AM	#1
miso diyAudio Member Join Date: Oct 2009	diy subwoofer Hello everyone I have simple 2A3 amp with Lowther EX2 Fidelio cabinet. I want to build subwoofer to match Lowthers but there is so many options any info will help thanks Miso

30th October 2009, 12:15 PM	#2
AndrewT diyAudio Member Join Date: Jul 2004 Location: Scottish Borders	the Lowther is very efficient. It will be impossible to achieve low frequency bass from a driver that can get close to the sensitivity of the Lowther. If you cut the LF requirement then high efficiency mid bass drivers can get near there. If you need bass extension then you must use much lower sensitivity drivers and they will demand much higher drive voltages. __________________ regards Andrew T.

30th October 2009, 02:34 PM	#3
chris661 diyAudio Member Join Date: Feb 2008 Location: Lancashire Blog Entries: 6	What he said. Some Pro drivers horn loaded would come close (I think), but the extension wouldn't be brilliant. How much power do you have on tap to work with? If it's not much, you'll be looking at some kind of horn, with more power, you can make the build simpler and use less efficient drivers. __________________ iPod Touch (playing LossLess) > 4th order LR crossover @80Hz > Amp-6b > Fostex FE126eN in folded ML-Voigt Pipes ------------------------------------------------------------> Samson Servo 240 > W6-1139SG Tapped Horns

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30th October 2009, 03:31 PM	#4
Highef diyAudio Member Join Date: Sep 2009 Location: Right above on the left	What is the problem to match efficiency? If a crossover is used to filter the low-freq and use a specific amplifier for the sub, the efficiency would not be a problem. regards Highef

30th October 2009, 07:00 PM	#5
miso diyAudio Member Join Date: Oct 2009	thanks to all my problem is that I can"t find on internet something will match Lowthers So question are -anyone have expirience -should I tray with something like full range horn with passive cross -full range bass reflex with active cross and strong amp Untill now I tray few subs from market but all of them was budget subs and result was I must to mention that 2A3 have only few wats if I go passive regards

31st October 2009, 04:03 AM	#7
audiojoy diyAudio Member Join Date: Sep 2005 Location: london	I have electrostatics and dipole open baffle subwoofes with a behringer electronic subwoofer and a 400w power amp keeps up in 'speed' and adds depth with total cohesiveness when correctly dialled in.

31st October 2009, 09:33 PM	#8
Brett diyAudio Member Join Date: Jan 2002	Biamp and go active with the sub, then power need not be an issue or the performance of the system dictated by a tiny amp.

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