noob thought of the day

[killa]

I reading some posts about puting subs in small sealed enclosures and it got me thinking. Could you put a paremetric eq on your lfe to boost the low end? You can get a 5 band car eq for around 60$. Of course you would also need a power supply.

[brianpowers27]

I reading some posts about puting subs in small sealed enclosures and it got me thinking. Could you put a paremetric eq on your lfe to boost the low end? You can get a 5 band car eq for around 60$. Of course you would also need a power supply.

ABsolutely, this can be done. Many people buy Behringer Feedback destroyers (12 band parametric eq) and go to town. The down side of undersized boxes is the reduced power handling though...

[arlis_1957@yahoo.com]

i have a behringer eq on my little shop system. it was 39 bucks from amazon.
works fine.

[romanbednarek]

Yes, I used to do this with my dual TC sounds 15" subs. Each was in a sealed enclosure a bit smaller than recommended for that driver (but the boxes were still pretty big). I used an Ashly pro-sound power amp to drive them (each speaker had dual 4 ohm voice coils connected in parallel for a net impedance of 2 ohms and the Ashly was rated at 675 watts per channel with that impedance). Anyway, I also had a 31 band graphic EQ that I would use to contour the low end a bit. Basically I would cut out the high Q peak and boost the response below that somewhat and this method worked great for that configuration.

If you are able to build a small sealed enclosure that has a high Q response with the driver, but not so high that it has a large peak then an amplifier with bass boost built in can extend the bass response (lower the f3). The sacrifice is power handling because it becomes easier to push the driver closer to its excursion limits. I did this with the RSS265HF driver in a 1 cuft sealed enclosure and the PE 240W plate amp with 6 dB bass boost at 30 Hz. This config brought the f3 from around 50 Hz to below 30 Hz and I've never heard this amp/driver combo struggle even at wall shaking levels. The simulated response is below and you can see how the boost makes it easier for the driver to reach its excursion limits even with only 100 watts of input power.