Hi,
I've built a few diy subwoofers with good results. I uploaded a pic of one I built. I want to build one more with a 15" driver for more output. I listen to mostly music and some HT. I love tight bass with no distortion. I also am into wood working so I can make any size box and have room for a nice size sub. I did want to go ported. I'm really lost on drivers and was wondering if someone could help steer me to a great 15" driver for a home subwoofer. I have a bridged amp putting out 625w at 8 ohms but may decide to go with a more powerful class D power amp. First I'll try what I have. When I called Parts Express they suggested this driver: https://www.parts-express.com/Adire-Audio-ADBR15D2RA-Brahma-15-XBL-DVC-Subwoofer-294-116?quantity=1 My budget is around 500.00 for the driver.
Any help is appreciated.
I've built a few diy subwoofers with good results. I uploaded a pic of one I built. I want to build one more with a 15" driver for more output. I listen to mostly music and some HT. I love tight bass with no distortion. I also am into wood working so I can make any size box and have room for a nice size sub. I did want to go ported. I'm really lost on drivers and was wondering if someone could help steer me to a great 15" driver for a home subwoofer. I have a bridged amp putting out 625w at 8 ohms but may decide to go with a more powerful class D power amp. First I'll try what I have. When I called Parts Express they suggested this driver: https://www.parts-express.com/Adire-Audio-ADBR15D2RA-Brahma-15-XBL-DVC-Subwoofer-294-116?quantity=1 My budget is around 500.00 for the driver.
Any help is appreciated.
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Greets!
Sorry, don't keep up with driver offerings, but there should be plenty to choose from depending on the desired XO point/slope.
'Tight' bass/audibly low distortion typically requires sealed, (stuffed) TL, or if ported, well damped.
T/S max flat:
Vented net volume (Vb) (L) = 20*Vas*Qts'^3.3 = ~194 L
Vented box tuning (Fb) (Hz) = 0.42*Fs*Qts'^-0.96 = ~21 Hz
F3 = Fs*0.28*Qts^-1.4 = ~19.6 Hz, though with a damped 7" dia. x 27.13" long vent sims ~ 26 Hz/2pi
This alignment when critically damped (QL = 2) will technically meet your needs up to the THX 120 Hz XO point/>2nd order, but down this low the room dominates, so may wind up needing the vent stuffed to 'taste'. 😉
Sims handling the full 1 kW from ~20 Hz - up/2pi
If wanting a higher XO point, then a driver with a lower inductance is ideally required/desirable.
Sorry, don't keep up with driver offerings, but there should be plenty to choose from depending on the desired XO point/slope.
'Tight' bass/audibly low distortion typically requires sealed, (stuffed) TL, or if ported, well damped.
T/S max flat:
Vented net volume (Vb) (L) = 20*Vas*Qts'^3.3 = ~194 L
Vented box tuning (Fb) (Hz) = 0.42*Fs*Qts'^-0.96 = ~21 Hz
F3 = Fs*0.28*Qts^-1.4 = ~19.6 Hz, though with a damped 7" dia. x 27.13" long vent sims ~ 26 Hz/2pi
This alignment when critically damped (QL = 2) will technically meet your needs up to the THX 120 Hz XO point/>2nd order, but down this low the room dominates, so may wind up needing the vent stuffed to 'taste'. 😉
Sims handling the full 1 kW from ~20 Hz - up/2pi
If wanting a higher XO point, then a driver with a lower inductance is ideally required/desirable.
Attachments
I personally don't bother with ports anymore unless it's for a high sensitivity setup. Passive radiators are the way to go as long as you tune nice & low (17hz or something unnecessary sounding like that). That gives a little extra extension, no port noise, and the group delay is horrible of course, but only at frequencies way below any musical content. I consider properly set up PR systems to be "sealed-plus". Of course PRs cost money....so maybe nevermind?😅
The Brahma is clearly a beast, but I've have trouble getting power to it that wouldn't blow breakers...do you have a dedicated 20 amp breaker available just for this sub and an amp to match? If so, go nuts!🤘
Edit: is your amp stable at 4ohms in bridged mode? Do you know if it's output increases with a reduction of impedance?
The Brahma is clearly a beast, but I've have trouble getting power to it that wouldn't blow breakers...do you have a dedicated 20 amp breaker available just for this sub and an amp to match? If so, go nuts!🤘
Edit: is your amp stable at 4ohms in bridged mode? Do you know if it's output increases with a reduction of impedance?