Quasar Mk2 Filter (BD-Design)
by giulio 
, Wednesday, February 22, 2006, 07:35 (6639 days ago)
Hi Bert,
I am building something which resembles the Quasar. Supravox 215 wideband, Lambda td15s woofer. I am trying to actively equalize the dipole rolloff of the woofer. I was wondering. Is the filter you use on the Quasar Mk2 composed of two first order filter in series (a bit like the one for the Oris bass but with different values)?
The reason why I am asking is that Linkwitz uses a shelving low pass for dipole equalization. Now I think my lambdas are closer to your BD15 in terms of frequency extension and may do away with a simple first order filter at 20hz for dipole equalization rather than a shelving low pass.
TIA.
Best
Giulio
Quasar Mk2 Filter
by Bert , Wednesday, February 22, 2006, 07:45 (6639 days ago) @ giulio
Hi Giulio,
I am building something which resembles the Quasar. Supravox 215 wideband,
Lambda td15s woofer. I am trying to actively equalize the dipole rolloff of
the woofer. I was wondering. Is the filter you use on the Quasar Mk2
composed of two first order filter in series (a bit like the one for the
Oris bass but with different values)?
Yes, the principle used is the same as with the Oris systems.
The reason why I am asking is that Linkwitz uses a shelving low pass for
dipole equalization. Now I think my lambdas are closer to your BD15 in
terms of frequency extension and may do away with a simple first order
filter at 20hz for dipole equalization rather than a shelving low pass.
That won't work, first the bass will then play too much higher frequencies and next, the Supravox 215 is sounding more "bold" compared to a Fostex drive unit. You'll need at least 6dB for the compensation and preferable an extra 12dB at the crossover point...
Ciao,
Bert
--
BD-Design - Only the Best!
Many thanks (nt)
by giulio , Wednesday, February 22, 2006, 10:40 (6638 days ago) @ Bert
