Debranded Nakamichi Sp-W30S or? - diyAudio
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Old 4th June 2015, 01:50 PM   #1
M8e is offline M8e  Sweden
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Default Debranded Nakamichi Sp-W30S or?

I'm thinking about making a couple of subwoofers. At this point I'm considering using these drivers, But the page nor the PDF says what driver it actually is, or much of the specs.

I think I have identified them...
Nakamichi SP-W30S?

Last edited by M8e; 4th June 2015 at 02:51 PM. Reason: spell
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Old 4th June 2015, 02:03 PM   #2
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Is it a HT or car app. Do you know what enclosure to use?
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Old 4th June 2015, 02:36 PM   #3
M8e is offline M8e  Sweden
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It's a 5.2 home system.

I was thinking about making sealed boxes with something like 100-140 liters per driver.

But this is at a really early stage. Kind of just want to know if I'm working with the right T/S specs so I can figure out if they are usable.
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Old 4th June 2015, 02:47 PM   #4
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It's best suited for a sealed speaker (HT) ~100L passive or ~40L with a Linkwitz or you can use a BR 113.0 L/19.4 Hz with port 11.8 cm/68.10 cm (D/L) or 9.4 cm/41.78 cm with more comp. in the port/less power, 90.8 dB/2.83V/m 2Pi, 86.8 dB/2.83V/m 4Pi.
http://nakamichi.in.ua/files/sp-w25s...m_20120406.pdf
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Old 5th June 2015, 11:48 AM   #5
bjorno is offline bjorno  Sweden
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Hi All,

FYI: T/S Data reverse engineered:

b
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Old 5th June 2015, 05:15 PM   #6
M8e is offline M8e  Sweden
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Tackor och bockar. / Ewes and rams.

If I'm reading that right, I guess I have to find some other drivers.

A Qts of 0.65 instead of 0.464? Makes a huge difference, and make them fall outside the usable range.

473.5 liters to get a Qtc of 0.707?
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Old 9th June 2015, 05:26 PM   #7
M8e is offline M8e  Sweden
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So, change of plan.

I could fit in boxes that's 30cm wide, 40-50cm deep and 210-~240cm tall, instead of the low 'boxy' ones I planned. Fitting a 12" driver on a 30cm wide baffle would be bit of a stretch. So I thought I could use two 10"'s in each sub.

So how does two of these Responce 250w 10" in each sub with a volume of 218-312 liters sound like? By my calculations 218-312L would give a Qtc of 0.62-0.69 ignoring volume of bracing and damping material.

Would the odd shape create any problems? Like the total SD area would be 685.6cm2 while the cabinet cross section could be as low as 1056cm2.
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Old 25th June 2015, 05:07 PM   #8
bjorno is offline bjorno  Sweden
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FYI:

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