Passive line filter (Oris Horns)

by madprofessor , 27777 Ganderkesee, Germany, Monday, December 10, 2007, 19:36 (5978 days ago) @ Bert

Hallo!
I´m using the BD 15/Oris 150 combination for bass and an own horn-system above.
I ´ve placed the passive filter between preamp and bass-amp, starting with a value of 1 kOhm for the first resistor.
I know, the filter was intended, to be used after the main amp, but I simply didn´t want the "bass-performance" of a set amp putting the signature on the bass system. My preamp can drive any impedance down to 40 Ohms, so that is no problem.
The matching of the single components I did first with measurements ( electrically and acoustically especially frequency response, phase, step response , group delay, dynamics) the fine tuning was made with long listening tests. I ended with about 20 % different values for the capacitors. But that is a different system, matched to one room and one listening position.
I also tried an active x-over, but was not satisfied by the sonics.
Best regards
Stephan

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