Just saw this on Parts Express: Dayton Audio PN395-8 15" NEO Series Pro Woofer with 4" Voice Coil 8 Ohm
Product Specifications
Thiele-Small Parameters
Looking to update my PAL12s that are loaded with Eminence LAB12Cs to something more compact in a 15, like an SS15 of CUBO15s. At that price I'm building 4
- High efficiency (97dB SPL at 2.83V/m) for amazing output capability
- 4" diameter inside/outside wound copper voice coil on glass fiber former
- Large copper cap for inductance control and low distortion
- Powerful FEA optimized Neodymium motor system (Bl over 25 TM)
- Generous 6.5 mm of Xmax with 48 mm peak-to-peak excursion before damage
- Durable fiberglass reinforced ribbed paper cone for rigidity and natural sound
Product Specifications
- Nominal Diameter 15"
- Power Handling (RMS) 800 Watts
- Power Handling (max) 1,600 Watts
- Impedance 8 ohms
- Frequency Response 40 to 3,500 Hz
- Sensitivity 97.3 dB 2.83V/1m
- Voice Coil Diameter 4"
Thiele-Small Parameters
- Resonant Frequency (Fs)44.1 Hz
- DC Resistance (Re)5.5 ohms
- Voice Coil Inductance (Le)2.2 mH
- Mechanical Q (Qms)8.82
- Electromagnetic Q (Qes)0.36
- Total Q (Qts)0.35
- Compliance Equivalent Volume (Vas)3.42 ft.³
- Mechanical Compliance of Suspension (Cms)0.09 mm/N
- BL Product (BL)25.3 Tm
- Diaphragm Mass Inc. Airload (Mms)150.0g
- Maximum Linear Excursion (Xmax)6.5 mm
- Surface Area of Cone (Sd)890.3 cm²
Looking to update my PAL12s that are loaded with Eminence LAB12Cs to something more compact in a 15, like an SS15 of CUBO15s. At that price I'm building 4
Nice efficiency but the Fs is kind of high. Looks like it won't want to do much below 30Hz. Small Vas though so could make for nice ultra high efficiency towers but would want some help for pipe organ otherwise you would have to tune an octave and a half below Fs. Might work though.
I should have mentioned these are for PA use not HT, so I'm not trying to reproduce anything < 30 Hz anyway.
- can see why you're excited - make a light weight - well braced Jim Bell SS15
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"20.75 lb" doesn't sound right - it oughta be lighter (?)
oops - forgot to enter 2.2mH Le - But that looks great too !
correct Le "bold"
2pi
\
"20.75 lb" doesn't sound right - it oughta be lighter (?)
oops - forgot to enter 2.2mH Le - But that looks great too !
correct Le "bold"
2pi
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The issue here is the Xmax. It's fairly low for a low Fb TL design. A 40 Hz Fb is probably as low as I'd go with that driver.
It does look nice for the price though 🙂.
I'm no good with t-line (GM and others are good) but would think a tapped pipe would make it usable to 30Hz or below (?)
(if not played real loud)
putting it in a 250 liter airspace. one - fold negatively tapered pipe in a corner shows
(but 160 liters tuned to ~24Hz - Not Shown - looks like a better tradeoff)
maybe Brian would suggest a 30Hz OD-TL if the excursion is good enough for you
(if not played real loud)
putting it in a 250 liter airspace. one - fold negatively tapered pipe in a corner shows
(but 160 liters tuned to ~24Hz - Not Shown - looks like a better tradeoff)
maybe Brian would suggest a 30Hz OD-TL if the excursion is good enough for you
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I've sim'd this driver in Martinsson's THAM15 and it looks good. I'm away from home or I'd post the response Hornresp shows. Parts express says the Xmech is 48mm, so the Xmax spec of 6.5mm is probably pretty conservative. My two cents!
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I'm considering an SS15, or a modtfied one, or maybe the 15" version of Art's Keystone sub.
The new 15" I'm excited about is the Radian 2216. OMG:
8 ohms
1400w RMS:
Sensitivity: 101 dB ! - unless they’re lying.
Power Compression: No idea.
Fs 36.8 Hz
Freq: 28Hz - 2K
BL 34.229
Qms 2.72
Qts .219
Vas 4.51 ft^3
Xmax 21.3 !
14 lbs !!!!!!!!!!!!!!!
Dennis @ Radian says it’s a 15” cone with an 18” motor.
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Frequency response is insanely flat (if they aren’t lying) to almost 30 Hz, and only 5 dB down at 20 Hz..
Maybe a 1 dB peak from 45 - 60 Hz.
- this graph was made with a 4.6 cu. ft. Vented Cabinet Tuned To 36Hz.
One possible downside is the price: $750. Still .......
The new 15" I'm excited about is the Radian 2216. OMG:
8 ohms
1400w RMS:
Sensitivity: 101 dB ! - unless they’re lying.
Power Compression: No idea.
Fs 36.8 Hz
Freq: 28Hz - 2K
BL 34.229
Qms 2.72
Qts .219
Vas 4.51 ft^3
Xmax 21.3 !
14 lbs !!!!!!!!!!!!!!!
Dennis @ Radian says it’s a 15” cone with an 18” motor.
--------------
Frequency response is insanely flat (if they aren’t lying) to almost 30 Hz, and only 5 dB down at 20 Hz..
Maybe a 1 dB peak from 45 - 60 Hz.
- this graph was made with a 4.6 cu. ft. Vented Cabinet Tuned To 36Hz.
One possible downside is the price: $750. Still .......
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lotta bread for that pretty Radian - it would be interesting if one little speaker could do a lot of work without failure
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Yes...it seems the xmax may be conservative. Though itis usually when the BL drops to 70% and where drive nonlinearity starts to rise isnt it?
Thanks for running that, Feddi.
Do you think a slightly modified SS15 design could smooth out those peaks & valleys a bit, and still go flat to 40 Hz?
Do you think a slightly modified SS15 design could smooth out those peaks & valleys a bit, and still go flat to 40 Hz?
Brian, is that for a standard-sized Tham15? Those little tiny boxes like Martinnson made?
If so, holy moley...
If so, holy moley...
Brian,
I used your Hornresp parameters and my sim did not come out looking like yours. Are you you using par, con, or exp?
I used your Hornresp parameters and my sim did not come out looking like yours. Are you you using par, con, or exp?
This is exactly the cabinet I'm considering 4 of these for, or the jbell ss15, or the tham 15, in that order. I think their weight specs may be off, I'm assuming an aluminum cast frame neo 15" to come in well under 20lbs
Exactly, this driver fills a huge void! I'm doing either 2 ss15s or 2 cubo15 extendeds, then maybe 2 more if they measure well and sound good.
Thank you for the Sims!
Here's the parameters I used, exported from the workbook.
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