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How much would a high quality, high pass filter cost? Would I connect it to the speaker cable to between the LF terminals and poweramp? Why's it called it a high pass filter- I would think calling it a Low Pass filter would make more sense?
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I'd check around at the DIY forum for the best deals and places to buy frequency and slope specific high pass filters. Yes, it would need to be inserted before the input terminals for the mid/bass driver.
It's called a high pass filter because you are essentially asking the filter to pass everything ABOVE a certain frequency (say 45 Hz in your case), and filter (at a specified slope) everything BELOW that frequency.
BTW, a high pass filter will start to reduce the output slightly above the specified frequency, and will typically be 3-6 dB down (depending on the slope you select) at the specified frequency.
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I assume if you use ported standmount/bookshelf speakers at normal listening levels then you wouldn't need one of these?- you would only need one of you notice parping/distortion/port noise.
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I would tend to agree. These speakers are not appropriate for reproducing really deep/powerful bass, so you shouldn't be sending them that kind of source material at high volumes.
These kinds of things tend to be self limiting. If the speaker starts to sound crappy, turn it down - simple.
Another way to skin this cat is to buy an A/V receiver or pre/pro that has a decent on-board bass management circuit. You could set the speakers to small (which imposes a digital high pass filter at the pre-amp stage), and set the crossover to say 40 or 50 Hz.
The nice thing is that this method will conserve amp power since you will be sending the amp stage an already filtered signal. In comparison, imposing a high pass filter after the amp stage (like you are considering) still requires the amp to deliver a full-power, full-range signal, obviously.
Regards,
Ed
