Goodmans Axiom 201 in TQWT Voigt Quarter Wave Pipe? - diyAudio
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Old 28th June 2006, 10:11 AM   #1
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Default Goodmans Axiom 201 in TQWT Voigt Quarter Wave Pipe?

Hi, anyone tried the Goodmans Axiom 201 in a Voigt Quarter Wave Pipe? I'm looking for a decent enclosure design for these beasties. OB is not really on the cards in the room in question or my Wife in question! Any suggestions would be most welcome!

RC
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Old 28th June 2006, 12:41 PM   #2
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Remind me of their T/S parameters.
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Old 29th June 2006, 01:52 PM   #3
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Default Limited Data

The only data I have is QTS = 0.7, SD = 0.0809 square Metres and FS = 35Hz

Thanks RC
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Old 29th June 2006, 03:10 PM   #4
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I've found the Vas for the 301 which is an impressive 311 liters,a nd I imaging the 201 will be near that. Q is too high really for this app too. Me, I'd do an open backed cabinet for them, so it looks pretty conventional. If you cover the rear with grill cloth, she'd never notice the difference. And dipole really is worth hearing. Alternatively, this might do nicely. You'd need to adjust the vent dimensions. I'll run a sim later -I've jsut had a tooth extracted, so I'm feeling a bit light headed, and I wouldn't want to make a mistake.

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Scott
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Old 29th June 2006, 03:43 PM   #5
Dumbass is offline Dumbass  British Antarctic Territory
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Here is some Goodmans literature on the driver, including enclosure plans:
http://melhuish.org/audio/images/Axiom201.jpg
http://melhuish.org/audio/images/Ax201Enclos1.jpg
http://melhuish.org/audio/images/Ax201Enclos2.jpg
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Old 30th June 2006, 07:36 AM   #6
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Default Open Backed Cabinet

Hi,

I've toyed with the idea of an open backed cabinet or 'folded' open baffle, I suppose if I built a reflex box with removable back panel, I get the chance to try both. Pity about the Voigt pipe being unsuitable, I really wanted to try that. Thanks for you help though I really do appreciate this.

RC
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Old 30th June 2006, 07:40 AM   #7
Nuuk is offline Nuuk  United Kingdom
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If you are going to use the 201's, you will land up with a big speaker which ever way you go!

This was my first 201 enclosure, a 110 litre ported box (it's standing next to a Wharfedale Linton)


Click the image to open in full size.

I find the open baffles that the 201s now sit in much prettier, so show this to SWMBO and get started!

Click the image to open in full size.

I now use much narrower glass wings and TL woofers to support the bass.
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Old 5th July 2006, 01:21 PM   #8
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i have tried them in a 120x80cm baffle. Almost nothing under 120Hz, regardless how far they were from rear-side walls. Very smooth sound, too smooth to be honest. It is the speaker of choice, if iron maiden has to sound like Keny Roberts.

Amplifiers used: 20w/16ohm Tripath chip, 2A3 SE with 28H primary inductance in the primary (0,3db/20Hz at full power-3w) total 5 kilo iron per plate in parafeed. 811SE, ca.10w, plenty of iron too.

I was dissapointed, because they realy do some things very-very well.

With 120lit ported enclosure, bass was much better, but nothing special either. This maybe has to do with the cabin, which had no absorbing material.
I want to try them in a sealded enclosure, but i have to find the time to put such a monster (150lit) together.

Greetings
Konstantinos
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Old 5th July 2006, 01:28 PM   #9
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Default Re: Open Backed Cabinet

Quote:
Originally posted by calvert73
Hi,

I suppose if I built a reflex box with removable back panel, I get the chance to try both.
RC

This was exactly my enclosure, but, as i have written above, results were compromised.

Konstantinos
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Old 8th July 2006, 08:04 AM   #10
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Default correction...

I don't know how it happened, two posts above i've wriiten: "811SE....". Well it was not. It was 6550SE, 7watts. Maybe i was looking to some 811SE pages at the same time, i'm sorry. As i noticed it, it was too late to change it.

Greetings
Konstantinos
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