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Old 13th January 2005, 12:40 AM   #11
simon5 is offline simon5  Canada
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Do you have a budget limit? You seem to want something very high end.

You could consider the Ascendant Audio Avalanche 18" or the Adire Audio Tumult 15". You could even go overboard and ask Adire Audio for a Parthenon design.

The driver you listed, the Hertz, could do around 122,5 dB at 20 Hz in room if you design it to be flat in room response.

Tempest would be around 121,5 dB at 20 Hz in room if you design it to be flat in room response.

Maelstrom would be around 123 dB at 20 Hz in room if you design it to be flat in room response. It's harder to have a flat in room response with the Maelstrom, it rolls off faster. You would have an amazing 128 dB peak SPL at around 100 Hz if it's max SPL that you want.
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Old 13th January 2005, 09:22 AM   #12
make72 is offline make72  Finland
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Ok.Can this made Maelstrom + 2 x 15" passive radiators and if so how big box and what amp i should put it? I think that Tumult could be too good, Tumult need huge amp to make it loud.
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Old 13th January 2005, 07:19 PM   #13
simon5 is offline simon5  Canada
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You should really consider this one...

http://www.ascendantaudio.com/Avalanche%2018.htm

Ok with a Maelstrom and two Passive radiators...

It will be hard to have a flat response in room down to 20 Hz because the response rolloff is fast down low. To get a good response the enclosure would be 300 liters if I use dual PR15 with 200 grams added in each so final tuning is 19 Hz. I would go vented with a box this big, it would need only a 6 inches long 4" diameter port. You could even put two 4" diameter ports of 15 inches long.

To reach 123 dB at 20 Hz and 128 dB at 100 Hz, you'll need 450W RMS. You can't use more because you're at full excursion.
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Old 14th January 2005, 07:01 AM   #14
make72 is offline make72  Finland
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I think max box size for me would be 150-200L.So Avalanche could be good?
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Old 14th January 2005, 04:50 PM   #15
simon5 is offline simon5  Canada
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For your box size, you should use Avalanche 15 or Tumult.
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