LFE Filter?

SDA1C

Hello,

I have a question about the Dayton 240 Plate. Or any plate for that matter...

When using the speaker level inputs does the amp act as a filter to the outgoing signal? That is, does the amp pass everything above the variable setting chosen and filter everything under the setting to the sub woofer?

Thanks, 1c

John K.

1c, the frequency control on the 240 and other sub amplifiers isn't a crossover, although it's often labeled that. It's only a variable low-pass filter which affects the sub driver only. It has no effect on any speakers which may be connected using the speaker level outputs on the sub. However, the 240 is one of those sub amps which also has a separate high-pass filter on the speaker level outputs. This is a relatively crude fixed filter set at roughly 100Hz(again, the sub's frequency control has nothing to do with this).

The bass management on modern HT receivers handles this function in a far more precise and adjustable fashion. You shouldn't connect your speakers through such sub amps, but instead connect them directly to the speaker outputs on the receiver.

SDA1C

I have this on a 2 channel setup. My pre has no sub out so I am forced to signal the plate with the speaker level inputs.

I was hoping the variable would cut all below desired sub signal and not let it pass to the mains but I'm taking as though thats not the case.

My source is a ps3 so no dice there either for a sub out.

I have found the sub to be quite a bit more responsive with the speaker level signal but seem to have lost a bit of headroom for ultra low/subsonic bass output. Does this seem correct?

Thanks, 1c

John K.

The input level to the sub amp may be slightly lower than when the line-level inputs are used(or it may not be)but this wouldn't reduce the power output of which the sub amp is capable. Setting the level control on the sub slightly higher might be necessary, but the maximum power and headroom at any frequency shouldn't be diminished.