MT122 - HELP!!! Sim & Plan Mod suggestions?????

HELP!!! Sim & Plan Mod suggestions?????

Printed From: Speakerplans.com
Category: Plans
Forum Name: MT122
Forum Description: Discussion / Questions about the MT122
URL: https://forum.speakerplans.com/forum_posts.asp?TID=32024
Printed Date: 26 March 2026 at 10:56pm
Software Version: Web Wiz Forums 12.08 - https://www.webwizforums.com

Topic: HELP!!! Sim & Plan Mod suggestions?????

Posted By: topdiggy2
Subject: HELP!!! Sim & Plan Mod suggestions?????
Date Posted: 26 October 2009 at 4:23am

Hello:

I am getting ready to build a MT122 however i want to build it to accommodate the specs using this 12" driver. I want the box to get me max fidelity & spl. I just want to know if these drivers are going to work well and give a decent performance. doesnt have to be "the best", but, a decent to good is acceptable.

Parameter	Value	Unit/Notes
Effective piston area (Sd)	545.44	cm²
Free air resonance (Fs)	52.6	Hz
DC resistance (Re)	5.9	Ω
Mechanical Q factor (Qms)	11.19
Electrical Q factor (Qes)	.57
Total Q factor (Qts)	.54
Voice coil inductance (Le)	.46	mH/milli-Henrys
Equivalent air volume (Vas)	77.1	Liters
Moving mass (Mms)	49.6	Grams/Mmd + air load mass
Suspension compliance (Cms)	184.53	µM/N/micro-Meters per Newton
Force factor (Bl)	13.02	Tm/Tesla-Meters
Sensitivity (SPLref)	97.0	dB/reference 8Ω/2.83Vrms

Then, here are specs for the compression driver i want to use

http://www.seleniumloudspeakers.com/site2004/catalogo/pdf/pro_driverfenolico_d305_new.pdf - http://www.seleniumloudspeakers.com/site2004/catalogo/pdf/pro_driverfenolico_d305_new.pdf

What size horn should i use? What kinda disperation angle? What modifcations would you suggest to optimize this cabinet?

Thanks

Replies:

Posted By: Lasse Lukkari
Date Posted: 26 October 2009 at 11:54am

The driver has low EBP and the BL isn't that great either.

Posted By: topdiggy2
Date Posted: 30 October 2009 at 3:15am

Lassie -

Will this driver work better in a reflex design like the X12?

thanks