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Old 30th October 2009, 10:20 AM   #1
diyAudio Member
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Default 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
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Old 30th October 2009, 11:15 AM   #2
AndrewT is online now AndrewT  Scotland
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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.
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Old 30th October 2009, 01:34 PM   #3
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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.
My work:
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Old 30th October 2009, 02:31 PM   #4
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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.

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Old 30th October 2009, 06:00 PM   #5
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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

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Old 30th October 2009, 08:24 PM   #6
bjorno is offline bjorno  Sweden
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Originally Posted by miso View Post problem is that I can"t find on internet something will match Lowthers..

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.

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File Type: gif Ciare 15.00SW-T-TQWT.GIF (183.1 KB, 288 views)
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Old 31st October 2009, 03:03 AM   #7
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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.
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Old 31st October 2009, 08:33 PM   #8
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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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