[help] sub driver recommend - Page 4 - Home Theater Forum and Systems - HomeTheaterShack.com

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post #31 of 52 Old 01-05-12, 01:26 PM
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Re: [help] sub driver recommend

Passive Radiator EX-PR18

SPECIFICATIONS
Fs: 20 Hz
Qms: 6.8
Mms: 300g
Cms: 0.20 mm/N
Vas: 391L
Sd: 1182 cm^2
Excursion: 32-35mm one-way
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post #32 of 52 Old 01-05-12, 06:43 PM Thread Starter
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Re: [help] sub driver recommend

I send e-mail to ask them. but I do not get any reply.
so I measure diameter of the PR-15 by myself
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post #33 of 52 Old 01-06-12, 06:05 AM
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Re: [help] sub driver recommend

I found the parameters that I need for the 15 inch Passive Radiators. What make and model number of amplifier are you using to power your sub?




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post #34 of 52 Old 01-06-12, 06:10 AM Thread Starter
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Re: [help] sub driver recommend

I buy behringer EP4000. Many people suggest it.
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post #35 of 52 Old 01-06-12, 06:24 AM
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Re: [help] sub driver recommend

Do you have a hi-pass filter for the amp?




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post #36 of 52 Old 01-06-12, 08:28 AM Thread Starter
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Re: [help] sub driver recommend

I do not have hi-pass filter.
I connect sub to yamaha RX-V765. I will buy a DSP named anti-mode 8033
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post #37 of 52 Old 01-06-12, 08:48 AM
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Re: [help] sub driver recommend

The Anti-Mode 8033 is an equalizer, it does not provide a hi-pass filter. You need a hi-pass filter to protect your driver and PR's from bottoming out.

Here are the different weights for your PR's.

Green- 550 grams added to each PR, 21 hz tuning, HPF at 18 hz.
Purple- 700 grams added to each PR, 19 hz tuning, HPF at 17 hz
Yellow- 850 grams added to each PR, 18 hz tuning, HPF at 16 hz
Orange- 1000 grams added to each PR, 17 hz tuning, HPF at 16 hz

[help] sub driver recommend-av15h.jpg




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post #38 of 52 Old 01-06-12, 08:56 AM
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Re: [help] sub driver recommend

The red line is the Xmax limit of the driver, without a HPF the driver will bottom out.

[help] sub driver recommend-cone-excursion.jpg

The same applies to the PR's.

[help] sub driver recommend-pr-excursion.jpg




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post #39 of 52 Old 01-06-12, 07:13 PM Thread Starter
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Re: [help] sub driver recommend

I am very grateful to you so much. you help me a lot.
ok, I will consider to buy a product that provide a hi-pass filter.
would you suggest good, cheap high-pass filter for me?

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post #40 of 52 Old 01-07-12, 03:25 AM Thread Starter
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Re: [help] sub driver recommend

I read some article on the web.
Many people suggest Reckhorn B2, elmental design EQ.2 ,behringer mic2200 or Diy ( but I do not know how to design...)
behringer mic2200:I know I can buy it on the parts express
elmental design EQ.2: I can buy it one elmental design website
but I do not know where I can buy Reckhorn B2

or other good HPF?
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