| Scottmoose |
I think I asked it in the title... don't know what to say now, other than to say if you can post them, I'd be greatful. I know there are the original specs available elsewhere on the net, but I'd like to know the Qes & Qms etc.
I realise that after all this time, chances are there will be a fair bit of variation between drivers, but an approximate is better than nothing at all.
Cheers
Scott |
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| Nuuk |
| I never managed to find them Scott! My one regret is that I didn't ask Dave Smith to measure mine when he rebuilt them. :( |
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| Scottmoose |
| Curses! Oh well, life would be boring if we knew everything... there's still some room for art after all. I'll let you know why I was asking at the end of Feburary. By then, I might have learned how to use a camera too... ;-) |
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| Nuuk |
| quote: | | I'll let you know why I was asking at the end of Feburary. By then, I might have learned how to use a camera too... ;-) |
Hmmm! Sounds like something to look forward to! :eek: |
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| Scottmoose |
OK... I'll whisper it now I've had chance to do some checking, and have found out it should work fine.
Anyone for a bipole? Take 2 Goodmans 201s. Now add 2 Eminence Beta 12LTA 12" drivers (apparantly similar parameters). Double the original Goodmans 200 litre enclosure design, keep the Goodmans as the front drivers and use the Eminence drivers in the rear. Should provide a nice sense of 'scale' to a recording... ;) The alternative was a couple of Jensen Imperials, which should be even better, but they wouldn't fit in his basement...
Cheers
Scott |
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| Nuuk |
Scott, I originally had my 201's in 120 litre boxes and the thought of 400 litres even scares this hi-fi addicted batchelor! :bigeyes:
I think I will stick to my OB's with the 'soon to be' dipole woofers using a pair of Max Pentivent 1230's for each channel. ;)
But don't let me stop you from coming up with these weekend projects! :D |
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| Scottmoose |
Tell me about it. They wouldn't even fit through my doorway, let alone work in the room. But Mike (the bloke I came up with these things for) is luckily blessed with lots of space. You know the way some people do loft conversions by completely bashing out the ceiling of one upstairs room, so you have a sort of large platform around it? Well, that's what he's done, in reverse, for his basement. Gives people quite a fright when they walk into the kitchen, and find a big square hole in the middle of it (with bannisters around obviously, apart from the staircase!). Seems a bit odd to me, but there you have it. Makes him happy, and his partner doesn't mid -it means the speakers are out of her way!
I look forward to reading about your dipole woofers -I've experiemted with them myself in the past, with excellent results, so I'll be interested to learn of your own experiences here and over on DD!
Cheers
Scott |
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| Nuuk |
| quote: | | Now add 2 Eminence Beta 12LTA 12" drivers (apparantly similar parameters). |
Scott, does that mean that you found some parameters for the 201s? :confused: |
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| Scottmoose |
Nope, unfortunately. However, Thorsten suggests the Eminence drivers can be used in the original Goodmans enclosure to very good effect, so I was working on the basis that if they both work in the same enclosure, chances are the parameters are fairly similar. If they aren't something funny's going on! If they are slightly off, then a small circuit should solve any major issues. That's the theory anyway.
http://www.fortunecity.com/rivendel...fterburner.html
Cheers
Scott |
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| ARRAY |
Hi Scott, I should have some Axiom 80 specs available in the not too distant future.
Now *that* is a driver that commands some bucks. |
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| carawu |
| Hope, this pic helps a bit... |
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| maxro |
| quote: | Originally posted by ARRAY
Hi Scott, I should have some Axiom 80 specs available in the not too distant future.
Now *that* is a driver that commands some bucks. |
You're not the person who won those NOS Axiom 80s from the UK on ebay, are you? They went for "some bucks", indeed.
I think the Twinax 220c drivers I got on ebay were so cheap because there is absolutely no information about them on the net.
Max |
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| Natali |
Dear all,
I have a couple of axioms 201 and I would like to build an enclosure for them but not too big as in the original drawings (130-200 liters....
Do you have any idea? Is it 80 liters enough? i.e a ported enclosure of w 45cm, h 80cm, d 25cm?
Another question: the axiom 201 could work in a sealed enclosure and how big?
Thanks a lot for the help,
Andrea |
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| Nuuk |
| quote: | | I have a couple of axioms 201 and I would like to build an enclosure for them but not too big as in the original drawings (130-200 liters.... |
The ported boxes that I tried (before going open baffle) were 110 litres. I think the only way you will find out if something smaller works is to try it! :cannotbe: |
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| Ouroboros |
I've got the TS parameters for the Axiom301/Audiom61 but not for the Axiom201/Audiom51 units. The cone and surround is the same in the 201 and 301 but the magnet on the 201 has a lot lower flux density than the 301 so the Qes (and therefore Qts) is much higher.
(By the way, the difference between the Axioms and the Audioms mentioned above is that the Axioms have the 'whizzer' cone, whereas the Audioms were the woofer-only units)
There were also higher resonance frequency versions of some of the Audioms for the PA and live music market. |
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| rcavictim |
| quote: | Originally posted by Ouroboros
I've got the TS parameters for the Axiom301/Audiom61 but not for the Axiom201/Audiom51 units. The cone and surround is the same in the 201 and 301 but the magnet on the 201 has a lot lower flux density than the 301 so the Qes (and therefore Qts) is much higher.
(By the way, the difference between the Axioms and the Audioms mentioned above is that the Axioms have the 'whizzer' cone, whereas the Audioms were the woofer-only units)
There were also higher resonance frequency versions of some of the Audioms for the PA and live music market. |
I have a pair of 15 ohm Audiom 60's that I saved from a organ console that had been left at the local landfill site. When I pulled the back off that organ and saw two of these I almost jumped up and down with glee. Open air tests (no baffle) in my living room reveal these to be extremely smooth, extended sounding drivers good out to 5K or more. with very high efficiency. One has a blue label identifying it as a Audiom 60, the other has a red label, also I.D'ing it as an Audiom 60 but with the added word BASS. The drivers look otherwise absolutely identical except one has a ribbed cone, the other plain. I cannot hear any sound difference in the full range out of bafle test. Both go up equally high and smooth. There are no cone rubs or buzzes, these are mint except for minor water stains (but no damage) on one cone. I suspect these would be awesome in a flea power SET amp configuration with my high efficiency >100dB, 5" Fountek ribbon tweeters.
I would like to build an enclosure for these that would really allow them to sing with high efficiency. I was thinking of trying them in my large 50 Hz front horn cabinets as a starter. Would something like a Jensen Imperial horn or what was that ultimate cabinet for the Tannoys, the Westminister(?) be the hot ticket?
Ouroboros, do you have any detailed info on my drivers that you could scan and email to me please? |
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| rcavictim |
| Here are the two different cones. |
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| rcavictim |
I wanted to add to my first post above but ran out of editing time.
Open air tests (no baffle) in my living room reveal these Audiom 60's, to be extremely smooth, very extended sounding drivers good out to 5K or more, with very high efficiency. Of special note there was no beaming issue, nor hint of low frequency doppler modulation of the highs. I repeated this test for Morgan Jones wanting to get his highly experienced opinion when he was paying me a visit last year and he agreed with my own conclusions. |
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| Ouroboros |
Just if anyone is interested, these are the Audiom61 / Axiom301 TS parameters I was given.
Fs 34Hz
Qts 0.217
Qes 0.23
Qms 3.4
VAS 311 Litres
Xmax 6mm
Piston area 0.0491 sq metres
SPL 96dB (1W/1M)
Flux density 1.6T
As I say, these are figures I was given. I now have four 15 Ohm Axiom 301s (2 with copper coils, 2 with aluminium coils) as well as a pair of 8 Ohm Audiom 61s, so I really ought to get down to it and measure the parameters for myself! |
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| Scottmoose |
| You, good sir, are a scholar and a gentleman. Many thanks for that. I have evil plans afoot... :devilr: |
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| Nuuk |
| Yes, you could say he is a Good man! :D |
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| rcavictim |
| Well Good Mens, anyone have any info at all about my Goodman's Audiom 60's as requested earlier in this thread? |
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| miksin |
Here are impedance and phase plots for a pair of axiom 80´s, "Wembley"-production.
I got also response curves in axis, 15, 30 and 45 degrees (baffle in anechoic chamber). In the case someone is interested to see them please let me know.
No, they are not t/s data you were askin for, but hopefully something of interest.
Yes, zMax really is 800 ohm. |
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| markusred |
yes,
please show the other curves.
Thanx Markus |
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| miksin |
Here are graphs of two drivers. Seems to be in 0, 20, 30 and 60 degrees and on axis, not as I remembered. Measured at 0,3 volts, with some fancy Bruel&Kjaers equipment in the Gradient Loudspeaker Company's anechoic chamber.
Dip around 900 hz is due baffle size.
Seems to generate 75 db with 0,3volts in 1 khz. |
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| miksin |
| a-ha, just one attachment in the post.. here are on-axis of the previous driver. |
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| miksin |
| Here another driver.. |
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| miksin |
| ... and its on-axis. |
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| ARRAY |
| quote: | Originally posted by maxro
You're not the person who won those NOS Axiom 80s from the UK on ebay, are you? They went for "some bucks", indeed.
I think the Twinax 220c drivers I got on ebay were so cheap because there is absolutely no information about them on the net.
Max |
Hi Max, that wasn't me. These Axiom 80's have never been on the market before, at least not for 40 years anyways. |
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