Could i build a backload horn whith Axiom10 - diyAudio
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Old 25th July 2013, 03:15 AM   #1
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Default Could i build a backload horn whith Axiom10

I have a pair of Goodmans Axiom 10 Speakers..

I would like to build a backloaded horn for this speakers..

Is a good option ?

i do not know thiell small parameters

Somebody could be help me ?

thanks friends

santiago
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Old 25th July 2013, 06:59 AM   #2
GM is offline GM  United States
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Based on the factory recommended reflex cab, it can be BLH loaded, but with no specs..........

GM
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Old 25th July 2013, 09:41 PM   #3
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I have a pair New never used , and some friends believe that can do the best in Back loaded horn , i am building a horn loaded , but i do not know the results

thanks a lot GM
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Old 25th July 2013, 10:11 PM   #4
xrk971 is online now xrk971  United States
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Do you have means of measuring TS params? I hear it can be done with pc sound card and 10 ohm resistor and wiring.
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Old 26th July 2013, 01:23 AM   #5
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i have Praxis from Liberty Instruments , but in this moment a friend of my is utilizing the Praxis
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Old 26th July 2013, 03:02 AM   #6
xrk971 is online now xrk971  United States
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Click the image to open in full size.
http://m307.photobucket.com/albumvie...ce/09.jpg.html
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Old 26th July 2013, 03:06 AM   #7
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good , thanks
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Old 26th July 2013, 06:09 AM   #8
GM is offline GM  United States
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Quote:
Originally Posted by santitrucco View Post
i have Praxis from Liberty Instruments , but in this moment a friend of my is utilizing the Praxis
Then you can measure T/S specs.

GM
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Old 1st August 2013, 03:34 AM   #9
zelgall is offline zelgall  Canada
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I have a pair of twinaxiom 10's that I can measure tomorrow. They're basically the same but different vintage and they have a small whizzer. It should be close. I wouldn't think that it would change much on the box side. The whizzer is about 3/4" long (or deep) and of relatively small diameter.
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Old 1st August 2013, 05:12 PM   #10
zelgall is offline zelgall  Canada
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goodmans twinaxiom 10 front.jpg

goodmans twinaxiom 10 back.jpg

Here's two Goodmans twinaxiom 10's
unit 1
Buffer[1] Vas Ver 7.01
Completed: Thu Apr 25 17:57:27 2013
Drive level 100.000% [3.615 mA]
Sine,LoZP(LV/LA)->Vas,21 pts
;------------------------------------------------------------------
Re = 13.7772 ohms
Fs = 51.7573 Hz
Zmax = 54.5619 ohms
Qes = 1.9372
Qms = 5.7348
Qts = 1.4481
Le = 0.5175 mH (at 1 kHz)
Diam = 222.2500 mm ( 8.7500 in )
Sd = 38794.7895 mm^2( 60.1320 in^2)
Vas = 126.3630 L ( 4.4625 ft^3)
BL = 6.0829 N/A
Mms = 15.9989 g
Cms = 591.0287 uM/N
Kms = 1691.9651 N/M
Rms = 0.9072 R mechanical
Efficiency = 0.8498 %
Sensitivity= 91.3111 dB @1W/1m
Sensitivity= 88.9504 dB @2.83Vrms/1m
Krm = 52.299E-06 ohms Freq dependent resistance
Erm = 1.075E+00 Rem=Krm*(2*pi*f)^Erm
Kxm = 6.182E-03 Henries Freq dependent reactance
Exm = 721.330E-03 Xem=Kxm*(2*pi*f)^Exm
;------------------------------------------------------------------
Ftest = 34.035 Hz
Ftest/Fms = 0.6576
Test Mass used = 21.0000 g (Equal to 4.2 nickels)
Test Mass (Ft=Fms*0.90) = 3.753 g (Add -17.247g for Ft=46.582)
Test Mass (Ft=Fms*0.75) = 12.444 g (Add -8.556g for Ft=38.818)

unit 2
Buffer[1] Vas Ver 7.01
Completed: Thu Apr 25 18:23:33 2013
Drive level 100.000% [3.616 mA]
Sine,LoZP(LV/LA)->Vas,22 pts
;------------------------------------------------------------------
Re = 13.9780 ohms
Fs = 55.2288 Hz
Zmax = 55.8164 ohms
Qes = 1.9612
Qms = 5.8701
Qts = 1.4700
Le = 0.5414 mH (at 1 kHz)
Diam = 222.2500 mm ( 8.7500 in )
Sd = 38794.7895 mm^2( 60.1320 in^2)
Vas = 124.2467 L ( 4.3877 ft^3)
BL = 5.9450 N/A
Mms = 14.2901 g
Cms = 581.1303 uM/N
Kms = 1720.7844 N/M
Rms = 0.8448 R mechanical
Efficiency = 1.0028 %
Sensitivity= 92.0302 dB @1W/1m
Sensitivity= 89.6066 dB @2.83Vrms/1m
Krm = 15.213E-06 ohms Freq dependent resistance
Erm = 1.183E+00 Rem=Krm*(2*pi*f)^Erm
Kxm = 6.772E-03 Henries Freq dependent reactance
Exm = 715.802E-03 Xem=Kxm*(2*pi*f)^Exm
;------------------------------------------------------------------
Ftest = 35.144 Hz
Ftest/Fms = 0.6363
Test Mass used = 21.0000 g (Equal to 4.2 nickels)
Test Mass (Ft=Fms*0.90) = 3.352 g (Add -17.648g for Ft=49.706)
Test Mass (Ft=Fms*0.75) = 11.115 g (Add -9.885g for Ft=41.422)

Last edited by zelgall; 1st August 2013 at 05:19 PM. Reason: added photos
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