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DIY Center Speaker

post #1 of 2
6/17/09 at 3:54am
Thread Starter 
Hi i have read that you can build the centre speaker box first then design the crossovers second is this true? . i can get the crossover professionally built I want to use the following listed.

1x 1" HDS Peerless tweeter T-S Parameters
Resonance Frequency fs 700 Hz
Mechanical Q factor Qms --
Electrical Q factor Qes --
Total Q factor Qts --
Force factor Bl -- Tm
Mechanical resistance Rms -- Kg/s
Moving mass Mms -- g
Suspension compliance Cms -- mm/N
Effective cone diameter D -- cm
Effective piston area Sd -- cm2
Equivalent volume Vas -- ltrs
Sensitivity (2.83V/1m) 93 dB

4x 6.5" HDS Peerless Phase plug mid woofers. T-S Parameters
Resonance Frequency fs 41.9 Hz
Mechanical Q factor Qms 2.41
Electrical Q factor Qes 0.42
Total Q factor Qts 0.36
Force factor Bl 8.2 Tm
Mechanical resistance Rms 1.83 Kg/s
Moving mass Mms 16.8 g
Suspension compliance Cms 0.86 mm/N
Effective cone diameter D 13.1 cm
Effective piston area Sd 135 cm2
Equivalent volume Vas 21.7 ltrs
Sensitivity (2.83V/1m) 87.8 dB
Ratio BL/√(Re) 3.4
Ratio fs/Qts F 122

Can someone please model a box for me?

Cheers Troy (I am a HT green horn but a quick learner)
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post #2 of 2
6/17/09 at 6:31am

Re: DIY Center Speaker

Try designing the box yourself. Download WinISD or Unibox and enter the Theile/Small parameters. They will give you both sealed or ported options. You can adjust the volume of the box and see how that impacts the frequency response.

You will need to know the baffle width before designing the crossover. That is very important in determining the Baffle Step Compensation of the crossover. I recommend having a place like Madisound do the design for you. They should be very familiar with the Peerless line of speakers.

-Robert
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