Recently I purchased some 65Hz high pass (they also have them @ 85Hz) filters from Audio Concepts Inc Audio Concepts. and placed them between the preamp and the amp to roll off the bass to the amps/main speakers (65Hz @ 6dB/octave). I was not expecting the improvement that I am hearing in imaging and openness in the high frequencies and midrange. I am also noticing a tightening of the low bass with a better ability to follow complex bass lines in both popular and orchestral music. This is a very positive addition w/o any apparent veiling or losses audible.
The sub is rolled out at the lowest freq possible i. e. 50Hz @ 12dB/octave. Frequency is variable but the slope is fixed.
Because it is a simple capacitor the phase shift is a nice 90° and isn't audible to me and didn't require a change in speaker position. For those who can't get a sub to work with their mains (Roberto ) this is a cheap, $40 including shipping, tweak to try, you may be surprised.
Why? I think for two reasons:
1. The woofers in the Clarity's aren't all that good in the bottom octave, distorting and muddying up the higher frequencies it is asked to reproduce, Clarity x-over @ 450Hz, and
2. The OPT core in the amps is less saturated w/o the last octave and 1/2 of the bass to pass thus allowing more efficient usage of the trafo at higher frequencies.
Those of you with CLSs/subs and no active x-over might want to give these a try. Getting the lowest frequencies out of the speakers and main amps may be a very good and cheap upgrade. It certainly is for me.
The sub is rolled out at the lowest freq possible i. e. 50Hz @ 12dB/octave. Frequency is variable but the slope is fixed.
Because it is a simple capacitor the phase shift is a nice 90° and isn't audible to me and didn't require a change in speaker position. For those who can't get a sub to work with their mains (Roberto ) this is a cheap, $40 including shipping, tweak to try, you may be surprised.
Why? I think for two reasons:
1. The woofers in the Clarity's aren't all that good in the bottom octave, distorting and muddying up the higher frequencies it is asked to reproduce, Clarity x-over @ 450Hz, and
2. The OPT core in the amps is less saturated w/o the last octave and 1/2 of the bass to pass thus allowing more efficient usage of the trafo at higher frequencies.
Those of you with CLSs/subs and no active x-over might want to give these a try. Getting the lowest frequencies out of the speakers and main amps may be a very good and cheap upgrade. It certainly is for me.