It features a two pole (12 dB/oct) low pass filter variable from 20 to 300 Hz in 20 Hz steps, and a high pass filter with 1 or 2 poles (6 or 12 dB/oct) which is also variable from 20 to 300 Hz in 20 Hz steps.
The woofer channel also has a 2 pole high pass filter for the woofer with a 6 dB equalization “bump” at 20 Hz. This is useful for extracting a bit more output at the bottom of the audio range of any loudspeaker, particularly open baffles, and functions as a subsonic filter below 15 Hz.
The full range high pass channel offers choices of shelving equalization curve (also known as “baffle step correction”) for full range drivers, variable from 250 Hz to 2.5 Khz with shelving at 0, -2, -4, -6 and -8 dB.
The active circuits are JFET buffers, most of them simple source followers without feedback. The distortion and noise are quite low, and the bandwidth is very wide.
I have one. They are around. Pass quality, no frills or hair raising looks.
FULL of WiMa caps and Vishay copper resistors. Single ended input and output. Separate dinky doo PS. That one I haven't figured out yet. BUT it's very quiet and it's a Pass design.. There is a lot of quality there.
1 - 1500.00 used only. You can talk him into making you one though.
Cool thing is it dosen't mess with impedance on the passive xo. Adding anything on the speaker cable side "WILL" mess with the factory XO, you have to be careful there..
IF you want a great option.. FW B5, The B4 should work.. 3 way if I remember.
Regards
