Have a look at the 12" version
Eminence Eminator 2512 12" High Power Car Subwoofer 4 Ohm
Xmax seems a bit low for a car audio driver, but the other specs suggest tapped-horn or tapped-pipe use could work out quite well.
Examples:
1. Housewrecker-wrecker - TH 456 cm long, throat=100 cm^2, mouth=950 cm^2, 0.5PI loading = 123dB from 23 Hz up (and still 115dB @20 Hz) with only 65W in. Oof!
2. Mini-wrecker - TH 368 cm long, throat=128 cm, mouth=810 cm, 0.5PI loading = 125dB from 30 Hz up (110dB@20 Hz) with 90W in.
3. Mini PA sub - add 1mH of inductance, TH 285 cm long, throat=148 cm, mouth=870 cm, perhaps a resonator@130 Hz if you want to extend the upper cutoff point, 2PI loading = 117 dB from 40 Hz up with 140W in. All from a 5.1 cu.ft. (net) box. Of course you'll use multiples (at less than $100 a driver, why not? 🙂)
Eminence Eminator 2512 12" High Power Car Subwoofer 4 Ohm
Xmax seems a bit low for a car audio driver, but the other specs suggest tapped-horn or tapped-pipe use could work out quite well.
Examples:
1. Housewrecker-wrecker - TH 456 cm long, throat=100 cm^2, mouth=950 cm^2, 0.5PI loading = 123dB from 23 Hz up (and still 115dB @20 Hz) with only 65W in. Oof!
2. Mini-wrecker - TH 368 cm long, throat=128 cm, mouth=810 cm, 0.5PI loading = 125dB from 30 Hz up (110dB@20 Hz) with 90W in.
3. Mini PA sub - add 1mH of inductance, TH 285 cm long, throat=148 cm, mouth=870 cm, perhaps a resonator@130 Hz if you want to extend the upper cutoff point, 2PI loading = 117 dB from 40 Hz up with 140W in. All from a 5.1 cu.ft. (net) box. Of course you'll use multiples (at less than $100 a driver, why not? 🙂)
Brian,
The Eminence Eminator 2512 is rated at 91 dB sensitivity, 6mm Xmax.
The output levels you suggest would require the cabinet to increase the sensitivity by as much as 14 dB.
Seems that 6 dB gain using TH is possible, where is the other 8 dB coming from?
Art
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Brian,
The Mini PA sub at 117 dB with 144 watts in provides 5 dB of gain over the 2512’s 91 dB sensitivity. That seems “normal”.
“2. Mini-wrecker - TH 368 cm long, throat=128 cm, mouth=810 cm, 0.5PI loading = 125 DB from 30 Hz up (110 dB@20 Hz) with 90W in.”
The “Mini-wrecker” , according to what you wrote, provides more than 13 dB of gain, (and goes 10 Hz lower) an additional 8 dB more gain than the Mini PA sub. The Housewrecker-wrecker, at 123 dB from 23 Hz up with only 65W in would be similar in gain.
Getting increased efficiency while going lower seems impossible, (as does 13 dB of gain) could you post the sims for the Mini-wrecker and the Housewrecker-wrecker?
Here's the mini-wrecker. Note I got the mouth wrong - should be 910 instead of 810 cm^2:
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