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Old 27th July 2013, 12:51 PM   #41
Toaster is offline Toaster  United Kingdom
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Nope, not the 130Z0. On relative output I suspect the spec. sheet figure for the power handling of the 10F is conservative, based on experience- but admittedly not on controlled measurements. Depending where you are in the UK Kev, I could lend you a pair of 10Fs and a pair of 100Z0s to try out.
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Old 27th July 2013, 12:56 PM   #42
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Good point Face, although since the system is using an active crossover gain may be available to compensate for sensitivity differences.
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Old 27th July 2013, 01:10 PM   #43
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On the 10Fs maximum output, this is interesting from Zaph's site.
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Old 27th July 2013, 01:41 PM   #44
Face is offline Face  United States
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Just curious, what are you using to calculate maxium SPL/Frequency as the HM130Z0 only has an x-max of 2mm.
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Old 27th July 2013, 02:09 PM   #45
Kev06 is offline Kev06  England
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Face, I'm using WinISD pro, though I'm no expert at it; for the HM130Z0 I'm getting a peak of around 0.656mm at 310hz, using a 4th order high pass at 300Hz in a sealed enclosure of 1.9L and at the rated power of 50w - giving me around 108dB (winISD has calculated its efficiency at 91.29dB; a tad less than the spec sheet).

For the SS 10F 8424G00 in the same scenario I'm getting around 0.5mm peak, and 99dB at its rated power of 15w - WinISD has calculated its efficiency at 87.75dB. If I go to 4x the rated power I get 105dB, but that makes me a bit nervous.

Have I got something wrong again?

Cheers
kev
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Old 27th July 2013, 02:10 PM   #46
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Ran a couple sims on the HM130Z0 driver and show if it's in a sealed box exceeds Xmax below ~175Hz @50w with a max spl of ~105dB/1w/1m. Next up was in a BR hitting Xmax 200Hz @50w with a spl of 109
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Old 27th July 2013, 02:15 PM   #47
Kev06 is offline Kev06  England
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Thanks Toaster, it does look interesting, thanks also for the very kind offer; I'm in Derby, but also probably a long way from doing anything 'real' yet so we'll see where this thread takes me.

Regarding the power rating being conservative, I had an idea - I wonder if I'm completely wrong to consider that the 20dB 'headroom' suggested by the THX reference should be within the nominal power of the drivers. It seems a sensible amount for peaks, but possibly I should treat it as short term power (largely insignificant extra heating), and just ensure I have the headroom in the amp voltage and Xmax? It somewhat goes against my belt-and-braces nature but it would make many more drivers possible.

Cheers
kev

Last edited by Kev06; 27th July 2013 at 02:29 PM.
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Old 27th July 2013, 02:15 PM   #48
Rixsta is offline Rixsta  United Kingdom
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Hi, I have purchased the Audax HM130C0 (5.25) and are using them in a 3 way setup and they sound superb actualy they sound superb without a crossover too when I was testing them. but for midrange they are lovely compared to my Dayton Rs52's
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Old 27th July 2013, 02:21 PM   #49
Kev06 is offline Kev06  England
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Quote:
Originally Posted by Greebster View Post
Ran a couple sims on the HM130Z0 driver and show if it's in a sealed box exceeds Xmax below ~175Hz @50w with a max spl of ~105dB/1w/1m. Next up was in a BR hitting Xmax 200Hz @50w with a spl of 109
That seems odd, I must have something wrong then; with a 300hz 4th order high-pass my simulations never get much past half the Xmax. Without the filter though I've exceeded it below 230Hz. I'll have to check my parameters.

Cheers
Kev
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Old 27th July 2013, 02:29 PM   #50
Kev06 is offline Kev06  England
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Quote:
Originally Posted by Rixsta View Post
Hi, I have purchased the Audax HM130C0 (5.25”) and are using them in a 3 way setup and they sound superb actualy they sound superb without a crossover too when I was testing them. but for midrange they are lovely compared to my Dayton Rs52's
Thanks , thats good to know. Having poked around the forum a bit, it does seem to have its fans so definitely still on my short list.

Cheers
Kev

Last edited by Kev06; 27th July 2013 at 02:52 PM.
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