Beyma 12LW30/N on ported Simplexx cabs?

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Cosmo
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Joined: Tue Sep 12, 2017 6:51 am
Location: Vigo, Spain
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Beyma 12LW30/N on ported Simplexx cabs?

#1 Post by Cosmo » Wed Sep 13, 2017 3:21 am

Hi guys, I was looking for designs to build around this speakers, mainly because are the ones with better price/spec ratio in my country. Could you help me to decide if they are a good choice for the simplexx project?

Beyma 12LW30/N

https://www.beyma.com/products/lowmidfr ... /112LW30N8

TECHNICAL SPECIFICATIONS
Nominal diameter 300 mm 12 in
Nominal impedance 8 Ohm
Minimum impedance 7 ohm
Power capacity 450 W AES
Program power 900 W
Sensitivity 96 dB @ 1 W @ ZN
Frequency range 40-4000 Hz
Recommended enclosure volume 20 / 70 l 0.7 / 2.5 ft.³
Voice coil diameter 77 mm 3 in
BL factor 20.2 N/A
Moving mass 0.071 Kg
Winding length 17.5 mm
Air gap height 8 mm
Xdamage pp 30 mm

THIELE SMALL PARAMETERS
Fs 42 Hz
Re 6.3 ohm
Qms 3.8
Qes 0.29
Qts 0.27
Vas 84 l
Cms 204 µm / N
Rms 4.9 kg/s
Efficiency % 2
Sd 0.054 m²
Xmax 7 mm
Vd 770 cm³
Le @1 kHz 1mH

It's difficult to me understand every thiele parameter, if you could help me, it would be great.


Thanks in advance.

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Tom Smit
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Location: Sarnia, Ont. Canada

Re: Beyma 12LW30/N on ported Simplexx cabs?

#2 Post by Tom Smit » Wed Sep 13, 2017 9:12 am

The only specification that is outside the preferred range is Qts. at .27. Judging from the plans, it should be closer to .4 as you can see in your plans. Bill has the final answer as to how well it will work for you.
TomS

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Bill Fitzmaurice
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Joined: Tue May 02, 2006 5:59 pm

Re: Beyma 12LW30/N on ported Simplexx cabs?

#3 Post by Bill Fitzmaurice » Wed Sep 13, 2017 10:24 am

Qts of .27 is less than ideal, it will cause a loss of low frequency extension. The driver xmax is sufficient to make up for that with the combination of EQ and amp power, if you have it.

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Fonkbass
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Location: London UK

Re: Beyma 12LW30/N on ported Simplexx cabs?

#4 Post by Fonkbass » Thu Oct 12, 2017 10:43 am

Or, go for the Beyma SM 212

TECHNICAL SPECIFICATIONS:

Nominal diameter 300 mm 12 in
Nominal impedance 8 ohm
Minimum impedance 6.5 ohm
Power capacity 350 W AES
Program power 700 W
Sensitivity 97 dB 1 W @ 1 m @ ZN
Frequency range 45-4000 Hz
Recommended enclosure volume 30 / 100 l 1.06 / 3.53 ft.³
Voice coil diameter 63.5 mm 2.5 in
BL factor 14.4 N/A
Moving mass 0.057 Kg
Winding length 19.5 mm
Air gap height 7 mm
Xdamage pp 27 mm

THIELE SMALL PARAMETERS:

Fs 43 Hz
Re 5.5 ohm
Qms 5.3
Qes 0.4
Qts 0.38
Vas 103 l
Cms 240 micro m / N
Rms 2.9 kg/s
Efficiency % 1.9
Sd 0.055 sq m
Xmax 8.25 mm
Vd 453 cu cm
Le @1 kHz 0.6 mH

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