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-   -   SS15 or Tham 15? (http://www.diyaudio.com/forums/subwoofers/218405-ss15-tham-15-a.html)

JohnnyPyro 23rd August 2012 05:22 PM

SS15 or Tham 15?
 
Hi Guys

Have been looking at building 8 tapped horns, drivers i have are B&C PZB40's

Have simulated these in horn resp and must admit im impressed with the results if loaded in the Tham15

But just wondering how these drivers would fair in the SS15 ? found a few details , but for the life of me i cant work out how to plot it horn resp

Be greatfull if someone could do this for me

specs are ...

Specifications
Nominal Diameter 380 mm (15 in)
Nominal Impedance 8
Ω

Minumum Impedance 6.6
Ω

Power Handling
(50 500 Hz)
Nominal
1 700 W
Continuous Program
2 1400 W
Sensitivity (1W/1m)
3 97 dB
Frequency Range 40-2000 Hz
Voice Coil Diameter 100 mm (4 in)
Winding Material Copper
Former Material Glass Fibre
Winding Depth 21 mm (13/16 in)
Magnetic Gap Depth 9 mm (19/32 in)
Flux Density 1.15 T

Also available in 4
Ω, data upon request

Thiele & Small Parameters
4

Fs 39 Hz
Re 5.3
Ω

Qes 0.3
Qms 7.4
Qts 0.29
Vas 112 dm
3 (4 ft3)
Sd 855 cm
2 (132.5 in2)

η
0 2.9%
X max 8 mm
X var 6.5 mm
Mms 123 g
Bl 24.3 Tm

Le 2.4 mH

Djim 24th August 2012 06:32 AM

Hi JohnnyPyro,

From the B&C database, these drivers have an Fs = 43Hz and the Xvar or Xlim are not known. The driver can be used in a SS15 and in a Tham :).


https://lh6.googleusercontent.com/-p...ZB40.jpg?gl=NL

JohnnyPyro 24th August 2012 08:35 AM

Thanks Djim .. i think i may build both and do an A/B test

martinsson 24th August 2012 10:16 PM

The SS15 is a seriously nice and well balanced design, all be it in the good company of the other nice ones floating around here, I look forward to a comparison between the two that has caught you eye, no matter the outcome, yes seriously :)

PS. Jbell - you're toast :) (and I do emphasize the ":)" )

Good luck with the builds, and thanks for sharing.

Best reg's // martnisson

jbell 25th August 2012 01:52 AM

Quote:

Originally Posted by martinsson (Post 3138770)
The SS15 is a seriously nice and well balanced design, all be it in the good company of the other nice ones floating around here, I look forward to a comparison between the two that has caught you eye, no matter the outcome, yes seriously :)

PS. Jbell - you're toast :) (and I do emphasize the ":)" )

Good luck with the builds, and thanks for sharing.

Best reg's // martnisson

And you can bring the 'jam' for my toast.

Game on friend !!! ;)

This is seriously one of the more respectful and knowledgeable sites around, and part of the reason I frequent here.
I too look forward to the builds.

kctess5 25th August 2012 03:24 AM

This should be fun to watch :)

JohnnyPyro do you have a passable measurement setup so we can get some data?
Keep in mind that the SS15 models with higher output but the Tham15 is about 2/3 the size. 9.2 ft3 vs 6.6ft3

NEO Dan 25th August 2012 04:50 AM

Quote:

Originally Posted by martinsson (Post 3138770)
PS. Jbell - you're toast :)

http://i111.photobucket.com/albums/n...7112388029.jpg

jsk 25th August 2012 09:14 AM

@johnnypyro

Build an ss15, and compare against one of my tham15's. May save you some build time / costs.

Joe

NEO Dan 26th August 2012 07:00 PM

http://i111.photobucket.com/albums/n...ndom/THAMT.png:p

jsk 26th August 2012 07:13 PM

TH one slice challenge?:)


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