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P.AUDIO BM8CXA DIY Midtop Plans

Printed From: Speakerplans.com
Category: Plans
Forum Name: Plan Requests
Forum Description: All plan requests here
URL: https://forum.speakerplans.com/forum_posts.asp?TID=102650
Printed Date: 28 March 2024 at 5:51pm
Software Version: Web Wiz Forums 12.06 - https://www.webwizforums.com


Topic: P.AUDIO BM8CXA DIY Midtop Plans
Posted By: MrScy
Subject: P.AUDIO BM8CXA DIY Midtop Plans
Date Posted: 02 October 2018 at 10:40am
Hello,

Just got 2 P.AUDIO BM8CXA coax drivers and I intend to use for light duty mid top jobs. I am looking for efficient DIY designs, horn loaded, parareflex etc. Looking for 130/200 to 18/20Hkz response

I wont mind a MT18 if there's(MT112 optimized for 8" coax) Smile

Please assist with plans and simulations.
Specs:
Low Frequency Specifications
Diameter : 8" / 203.2mm
Impedance : 8 ohms
RMS Power : 200 watts
Program Power : 400 watts
Frequency Range : 80Hz - 18kHz
Sensitivity : 95dB SPL
Voice Coil : 2.5" / 63.5mm
Magnet Weight : 60 oz.
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High Frequency Specifications

Rated Impedance: 8 ohms
RMS Power Rating: 40 watts
Program Power Rating: 80 watts
Frequency Range: 1.5kHz - 18kHz
Sensitivity (1W/1m): 105dB SPL
Voice Coil Diameter: 1.35" / 34.3mm
Magnet Weight: 2.2 lbs.

===============================
Thiele-Small Parameters

Resonant Frequency (Fs): 53 Hz
Impedance (Re): 6.5 ohms
Mechanical Q (Qms): 4.5
Electrical Factor(Qes): .22
Total Q (Qts): .21
Comp. Equivelant Vol. (Vas): .93 ft3 / 26.45 Liters

Voice Coil Overhang (Xmax): 3 mm
Surface Area of Cone (Sd): .021 m2
BL Factor (BL): 14.3 T-M

 


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montek.co.za



Replies:
Posted By: Mircea Bartic
Date Posted: 08 October 2018 at 9:22am
I'm afraid you will only get a bassreflex or back loaded horn option. You can't put a coaxial in a front horn because you will loose the driver's output (horn acts as a lowpass)


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general manager & head designer at nexus-acoustics research
http://www.facebook.com/nexus.acoustics.research" rel="nofollow - http://www.facebook.com/nexus.acoustics.research

Ex Nexus_3


Posted By: PavelP
Date Posted: 08 October 2018 at 4:21pm
Mircea Bartic, tell it to Tom Danley )

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Volnovod audio https://vk.com/kb_volnovod


Posted By: DMorison
Date Posted: 09 October 2018 at 12:35pm
To be fair, by avoiding having a compression chamber in front of the cone, Danley avoid that risk pretty easily as that's where the low pass characteristic comes from.



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