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Can someone graph this sub possibly vs the rsd 10
Posted: Thu Jun 19, 2008 5:35 pm
by Mackenzie
http://www.nkmca.com/auto/subwoofer/sp_w104s_specs.htm
Diameter: 10"
254mm
Sensitivity: 88.7dB
Power Handling:
Watts RMS: 250 Watts
Watts Peak: 400 Watts
Frequency Response: 25Hz-500Hz
Nominal Impedance: 4 Ohms
Cone Material: Polypropylene
Basket Material: Steel
Surround Material: 2" Rubber
Spider Material: Poly/Cotton
Magnet Weight: 100oz.
Voice Coil: Single
Free-Air Resonance (Fs): 25.612Hz
Mechanical Dampening (Qms): 4.409
Electrical Dampening (Qes): .335
Total System Dampening (Qts): .312
Voice Coil DC Resistance (Re): 3.2 Ohms
Equivalent Acoustic Volume (Vas): 75.656 Liters
Effective Diaphragm Area (Sd): 33.006 sq. meter
Linear Coil Excursion (Xmax): 10.5mm
Half Space Output Level (SPL): 88.7dB
Energy Bandwidth Product (EBP): 76.45
Mass of the Moving System (Mms): 79.163 grams
Posted: Thu Jun 19, 2008 6:19 pm
by stipud
Good find! That sub looks eerily similar! Same basket and everything
Posted: Thu Jun 19, 2008 7:22 pm
by KHPower
If my BassBox software will work I can check it out
Any boxes you want to try them in?
Posted: Thu Jun 19, 2008 9:22 pm
by Mackenzie
I will be running them ported, but you can graph them in both boxes if you can..
Posted: Thu Jun 19, 2008 9:26 pm
by Mackenzie
stipud wrote:Good find! That sub looks eerily similar! Same basket and everything
It seems to have decent specs aswell. For the price these things are going for on ebay, I dont think I can pass them up. I was mainly trying to see what they graphed like on the low end, but I think they will do well.
Not exactly the best store to buy them from, but you get my drift on the prcing.. Im really debating hard on buying 6 of these things..
http://cgi.ebay.com/ws/eBayISAPI.dll?Vi ... =p3907.m29
Posted: Thu Jun 19, 2008 10:10 pm
by KHPower
I may need a exact box sixe and tuning you are after. I couldnt find any box info on the subs site. Let me know
Posted: Fri Jun 20, 2008 6:25 am
by KHPower
On a side note , after entering all of the parameters for the Nakamich. bassbox has a slider bar that leans either to the right or left to indicate what enclosure is best for a particular sub , right being ported and left being sealed and the bar is a touch over half towards a vented but it looks like it will do equally good in a sealed because the bar is almost base line in the middle.
Posted: Fri Jun 20, 2008 7:37 am
by Mackenzie
hmm try 1.25 ported. I dont see any box specs either.
Posted: Fri Jun 20, 2008 7:59 am
by stipud
Well, while they look the same, but appear to be quite different. The Nak gave up low frequency output in exchange for efficiency. It shouldn't sound nearly as good on deep bass as the RSD does, but it should be louder.
First I graphed them free air, so you can see their natural reponse curves.
Then I went with BBX's recommended "high fidelity" ported enclosures...
RSD: 1.65cuft @ 23Hz
NAK: 1cuft @ 30Hz
Tuning the Nak any lower would make it boomy, while the RSD could easily handle tuning below 20Hz
Posted: Fri Jun 20, 2008 8:28 am
by Mackenzie
Looks interesting.. Definately worth a shot.. Not that Ide ever tune any car box lower than 30 hertz anyways, as its not needed.
I wonder why these things are going so cheap. Might be a gem for all we know..
Posted: Fri Jun 20, 2008 8:40 am
by KHPower
Good thing Stipud got it right
I had some box hitting in the 140's
I wonder where I messed up , or did I ?????
Posted: Fri Jun 20, 2008 9:35 am
by stipud
KHPower wrote:Good thing Stipud got it right
I had some box hitting in the 140's
I wonder where I messed up , or did I ?????
My custom amplitude graph is rated at 500w, perhaps yours was at 5000?
