modify Infinity BU2 Sub?

[plmedeiros]

Hi,

I have an old Infinity BU2 powered subwoofer. It's a 12" ported subwoofer that's fairly boomy and not very accurate. I added dampening material to the inside walls to nock down some of the resonant peaks. It has improved a little but it's still not clean enough. Does anyone have any suggestions on what other mods might improve this unit? A replacement woofer? Port mod?

I've included the specs below.

Thanks

BU-2 SPECIFICATIONS
Driver . . . . . . . . . . . . . . . . 12" Woofer
Nominal Impedance. . . . . . . . . . . . 4 Ω
Enclosure Design. . . . . . . . . . . . . Tuned Port
Amplifier Power . . . . . . . . . . . . . 100watts RMS
Frequency Response . . . . . . . . . . . 30Hz - 150Hz (± 3dB)
Crossover Frequency . . . . . . . . . . . 50to200HzContinuously Variable
Inputs
Line Level . . . . . . . . . . . . . . . RCAjacks
High Level . . . . . . . . . . . . . . . (Speaker) Input terminals
Outputs. . . . . . . . . . . . . . . . Full range Speaker
Sensitivity
Low Level . . . . . . . . . . . . . . . 70mV
High level . . . . . . . . . . . . . . . 1.7V
Input Impedance
Low Level . . . . . . . . . . . . . . . 12KΩ
High level . . . . . . . . . . . . . . . 4.7KΩ
Auto-Off Delay . . . . . . . . . . . . . 8 minutes
Dimensions
Inches . . . . . . . . . . . . . . . . 14½x14½x14½"
Metric . . . . . . . . . . . . . . . . 36.8 x 36.8 x 36.8cm
plus 1¼" (32mm) for feet
Shipping Weight . . . . . . . . . . . . . 43lbs/19.5 Kg.

 

[no. 5]

Try moving it to a different location in the room, or adding a parametric equalizer; the room is in almost complete control throughout a subwoofer's pass band, if the sub is energizing a room mode that is present at you listening position, changing the slope of the subwoofer's frequency response will not fix the problem.

 

[plmedeiros]

Thanks for the suggestion. I've moved it about the room in the past and the performance didn't change much.

Thanks

 

[no. 5]

Then again, it may be a subwoofer with a high Q tuning...

If you have a way to measure the in room response, that will help immensely with fixing any response issues.