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Old 10th September 2008, 11:58 PM   #11
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Default Did you check in with Jack Hidley?

I haven't checked recently but last time I looked he had a nice selection of woofers of various sizes (3"-15") for very reasonable prices. There is a spreadsheet of the parameters on his website. I bought a host (~40) 3" peerless midbass units for $1 each.

At BAF2007, IIRC he was running his Klippel analyzer against some of the woofers to show the 'real' parameters and how they compared to the spec sheets.

HTH

Stuart
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Old 11th September 2008, 12:17 AM   #12
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I think I'm ready to declare a few winners here.

The all-around best "bang-for-the-buck" is the MCM 55-2421. Often found on sale for $25, it offers an FS which isn't too low for a good tapped horn, along with more displacement per dollar than ANY woofer with an FS above 30hz.

IF you have amplifier power to burn, a DIYCable Tempest-X in a plain ol' bandpass enclosure will give you far and away the most displacement per dollar of any woofer I could find. It offers about TWICE the displacement per dollar as the MCM, and nearly FIVE times as much as a comparable woofer from Peerless.

An honorable mention goes to the Audax HT240G0. It offers more displacement per dollar than the MCM. The only reason that it doesn't trump the MCM is that it has a *very* high QTS, which can make it difficult to use in a tapped horn. It will work very well in a sealed box or a single reflex bandpass.

Check out the attachment for the rankings, updated to include the LAB12 and it's lil' sister the HL10C.
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File Type: pdf displacement for the buck.pdf (98.0 KB, 108 views)
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Old 11th September 2008, 12:31 AM   #13
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Default Re: Did you check in with Jack Hidley?

Quote:
Originally posted by Stuart Easson
I haven't checked recently but last time I looked he had a nice selection of woofers of various sizes (3"-15") for very reasonable prices. There is a spreadsheet of the parameters on his website. I bought a host (~40) 3" peerless midbass units for $1 each.

At BAF2007, IIRC he was running his Klippel analyzer against some of the woofers to show the 'real' parameters and how they compared to the spec sheets.

HTH

Stuart

You sir, are my hero!

That web site is amazing. An NHT1259 clone for $20? Yes I think it's time to re-calculate this spreadsheet of mine.

With 13mm of xmax and an SD of about 500, the NHT1259 scores over THREE HUNDRED on displacement/dollar chart. Yowza. It's totally inappropriate for a tapped horn, but three of these in BP boxes with a 500watt plate amp would be more bass than I'll ever need.
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Old 11th September 2008, 12:32 AM   #14
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Default FYI, Jacks 'big' woofers...

The npt-11-075/083 parts look good to me...no idea if the other parameters could work though...I saw these doing +/-11mm excursions, with no baffle they were almost inaudible, but quite scary...

Name dia sens sd xmax price
AR 12" 95.20 0.05070 5.0 $45
Jensen 15" 96.20 0.08501 6.0 $60
npt-11-075-2 10" 85.47 0.03631 13.0 $20
npt-11-075-1 10" 85.47 0.03631 12.5 $20
npt-11-083-2 10" 84.48 0.03631 13.0 $30

Somewhere on his site he mentions buying eight to use in a sealed enclosure (coffin?) and really scaring the neighbors...

Stuart
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Old 11th September 2008, 12:39 AM   #15
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Correction - it's a 10" with the motor of a NHT1259. I'm surprised the FS is so low! Yowza.

http://home.comcast.net/~jhidley/Kli...I_Detailed.htm
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Old 11th September 2008, 02:02 AM   #16
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Quote:
Originally posted by Patrick Bateman

The only reason that it doesn't trump the MCM is that it has a *very* high QTS, which can make it difficult to use in a tapped horn.
Not really, it will just be big at ~30 ft^3 net, but at the price you can divide it up into several at low cost.

Corner loaded expo, 25 W:

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File Type: gif audax ht240g0 17.6-135.83 hz expo th.gif (18.3 KB, 814 views)
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Old 11th September 2008, 09:56 AM   #17
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MCM 55-2421 cone dia is 163mm, or 208.57cm^2, times 0.8cm equals 166.85cm^3 for $30 (D/C=5.562)

3015LF 881cm^2, times 0.96cm is 845.76cm^3 for $124.60 (D/C=6.787)

Fs=42hz
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Old 11th September 2008, 10:00 AM   #18
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Quote:
Originally posted by djk
MCM 55-2421 cone dia is 163mm, or 208.57cm^2, times 0.8cm equals 166.85cm^3 for $30 (D/C=5.562)

3015LF 881cm^2, times 0.96cm is 845.76cm^3 for $124.60 (D/C=6.787)

Fs=42hz
Now we're getting somewhere! That's the first woofer that's outperformed the MCM and isn't a "limited edition" like the NHT woofers. But where do you get it for $124.60? It's $180 at partsexpress. And I see you're in the USA?

http://www.partsexpress.com/pe/showd...number=290-598
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Old 11th September 2008, 10:33 AM   #19
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http://www.martinsoundpro.com/index.asp

They have a two-tier pricing schedule, I pay $124.60 in one-lot.
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Old 11th September 2008, 10:46 AM   #20
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I don't know how I'd get that pricing, but this woofer looks promising. It's 2.5x as expensive as the MCM, but it also has 2.5x the displacement, over 3x the power handling, and much higher efficiency.

http://www.martinsoundpro.com/moreinfo.asp?id=1284

It reminds me of the woofers that Stryke was selling about five years ago.

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