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My SMT212 CP755TI / SN12B

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wafflesomd View Drop Down
Young Croc
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Post Options Post Options   Thanks (0) Thanks(0)   Quote wafflesomd Quote  Post ReplyReply Direct Link To This Post Posted: 30 November 2008 at 12:35pm
I probably won't be testing these out anytime soon.

I need to invest in some fane 15" reflex 2 ways.  Those will work much better for me at the moment.  It would cost quite a bit to get drivers that will work well in these cabinets.
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Old Croc
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Deadbeat Quote  Post ReplyReply Direct Link To This Post Posted: 30 November 2008 at 12:39pm
Sorry mate, we've gone a bit off topic Embarrassed
Away on extended leave.
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wafflesomd View Drop Down
Young Croc
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Post Options Post Options   Thanks (0) Thanks(0)   Quote wafflesomd Quote  Post ReplyReply Direct Link To This Post Posted: 30 November 2008 at 1:00pm
Not at all.  I enjoy talking about theory and doing some research.

Oh wait, this isnt my thread lol.


Edited by wafflesomd - 30 November 2008 at 1:01pm
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Old Croc
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Deadbeat Quote  Post ReplyReply Direct Link To This Post Posted: 30 November 2008 at 1:32pm
We hijacked a hijack LOL
Away on extended leave.
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Old Croc
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Post Options Post Options   Thanks (0) Thanks(0)   Quote login4 Quote  Post ReplyReply Direct Link To This Post Posted: 30 November 2008 at 10:37pm
LOL LOL i tell ya what lads ill try and get some sweeps etc done on mine asap and then post the results up on here,
CELTIC SUBSONIC SOUND SYSTEMS
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Post Options Post Options   Thanks (0) Thanks(0)   Quote shello79 Quote  Post ReplyReply Direct Link To This Post Posted: 08 June 2013 at 3:00am
would these work

         mccauley              M1220 Specs:

Nominal Diameter 12" / 305 mm 
Rated Impedance 8 ohms 
Power Capacity 600 Watts Program 
Sensitivity 101 dB 
Frequency Range 75 Hz - 4000 Hz (+/- 3dB) 
Highest X-Over Fq. 3500 Hz 
Recommended Enclosure Volume .5 -1.5 Cubic Feet / 14 - 42 L 
Effective Piston Diameter 10.23" / 260 mm 
Voice Coil Material Copper Clad Aluminium 
Voice Coil Winding Depth 0.45" / 11.4 mm 
Voice Coil Diameter 4" / 100 mm 
Magnetic Coil Gap 0.3" / 7.62 mm 
Magnetic Assembly Weight 19 lbs. / 8.6 kg 
Flux Density 13,800 Gauss 
Bl Factor 19.4T *m(8) 
Moving Mass .045 Kg

Theile-Small Parameters 
Fs Free Air Resonance 52 Hz 
Re D.C. Coil Resistance 5.6 (8) 
Qts Total Quality Factor 0.215 
Qms Mechanical Losses 7.25 
Qes Electrical Losses 0.222 
Vas Equivalent Volume of Air 82 L 
Sd Effective Piston Area .053 square meters 
Xmax Excursion - Max Bl 3 mm 
Vd Sd x Xmax 159 cubic cm 
Mms Effective Moving Mass .045 Kg 
Le Inductance of Voice Coil 1 mH 
%eff Mid Band Efficiency 5.1% 
Pe Max Power Rating 300 watts RMS Sine Wave

     


     i have six of these and i would like to build the smt to go on top a few mini scoops
 any help would be greatly appreciated thank you
Work hard play even harder
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Post Options Post Options   Thanks (0) Thanks(0)   Quote nkdk Quote  Post ReplyReply Direct Link To This Post Posted: 17 August 2014 at 5:19pm
Hi very nice buildSmile
I have build a pair to , with a pair kappa 12 a from eminence and a Rcf 2" driver.
Did you use   damping behind the too 12" drivers ?

nkdk
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Old Croc
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Post Options Post Options   Thanks (0) Thanks(0)   Quote login4 Quote  Post ReplyReply Direct Link To This Post Posted: 14 September 2014 at 6:55pm
Originally posted by nkdk nkdk wrote:

Hi very nice buildSmile
I have build a pair to , with a pair kappa 12 a from eminence and a Rcf 2" driver.
Did you use   damping behind the too 12" drivers ?

nkdk

hi, yes i always dampen my speakers, especially mid's Smile 
CELTIC SUBSONIC SOUND SYSTEMS
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Fracture_clinic View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Fracture_clinic Quote  Post ReplyReply Direct Link To This Post Posted: 11 March 2019 at 1:33pm
Sorry to hijack a hijacked hijack.. does anyone know the dispersion of the 12 inch section (single)?

TIA

Build thread coming soon.

Edited by Fracture_clinic - 11 March 2019 at 1:33pm
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sushi View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote sushi Quote  Post ReplyReply Direct Link To This Post Posted: 29 March 2019 at 11:21am
Hi there!
I'm about to build a pair of smt's: i'm going for the single 12" version, after i modified the plans and verified all measurements are correct.
I've read someone loaded the smt-212 with Eminemce kappa12a.. any feedback? how did it sound?
I already have a pair kappa12a and i'll surely give a try 'cause i like how they sound.. but i know they usually work well in big boxes, smt's on the contrary have a really small chamber!
I'm going to try to load the speakers i already have. you know.. trying doesn't cost anything (but time).
Anyway, I'm a little anxious because if they won't sound well i'll have to spend a lot of money for a pair of 12": 18sound 12nd710 is far too expensive, B&C 12pe32 is much more affordable but i'm not sure it's a good choiche (Vas is similar to the kappa12a, i'm afraid it's not good for a little chamber as well). There's no way i can get a pair of p audio sn12b (way too expensive, plus having them shipped to italy would cost me a lot).
I'll give my feedback when i finish the job. In the meantime, if anyone had tryied the smt with the kappa12a, please let me know.
Cheers!
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Fracture_clinic Quote  Post ReplyReply Direct Link To This Post Posted: 29 March 2019 at 11:27am
Can you access any RCF drivers? or Beyma? The B&C isn't a bad choice from what I've read. I'm going with the RCF LF12G301, the MB12G301 would be another similar choice if you're always going to be using kick bins (or BR that you can cross straight into).
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Post Options Post Options   Thanks (0) Thanks(0)   Quote sushi Quote  Post ReplyReply Direct Link To This Post Posted: 29 March 2019 at 1:36pm
hi! thank you for your answer! yes i can easily access RCF drivers..
honestly, i think the LF12G301 it's just too low freq, must be kickass for basses, but doesn't reach the 2.5 or 3khz where i need to crossover them..
On the contrary the MB12G301 can do the job perfectly: 72 liters is the lowest Vas i've found so far, probably works well in SMT's chamber! ...and the price is good for a 400w/98db RCF driver!
thank you for your advice! i think i'm going to try with the MB12G301, i'll also test the difference in performance between them and the Kappa12A.
oh right.. one point i was missing.. I'm going to use the SMT's on top of a kick section (2 HD15 loaded with Eminence Kappa15LFA) and a sub section (2 ESW1018 loaded with RCF L18S801) ..planning to double-up the rig, somewhen, and build other 2 kicks and 2 subs (or maybe sell the ESW1018 and build 4 WSX, in my porn dreams )
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