I am looking for experience with equalisation, DSP or analogue:
I am facing a need for equalisation due to my directivity choice and involved drivers:
I want omnidirectional mids and high frequencies, plus dipole bass.
My choice of drivers is 2 x 2 BMS 18N862 (in configuration as in Celestion 6000), plus a pair of German Physiks DDDs.
Dipoles will need some equalisation, I still need to calculate exactly how much. I intend to equalise till 30-35 Hz, and cut at Fs (25 Hz). I will probably need up to 12 dB boost.
DDD drivers cover 200-20,000 Hz, but they need equalisation. Need to ask their maker for exact details, wondering if they need a notch filter or two.
I have a simple active crossover (dbx 234), and I can manage dipole equalisation using an PA amp (have Dynacord 1800L with DSP for that role).
Still, I need to equalise the DDDs.
DDDs could get passive circuits (an Italian review (on G. P. site) has the schematic as used in G. P. Borderland IV speaker).
Or I can add to the chain an equaliser, graphic (inexpensive) or parametric (not inexpensive).
Or I can go for a proper speaker management DSP tool like Xilica XP.
I hesitate to choose DSP, as that will mean extra AD / DA conversions; yet graphic equalisers have poor rep, and parametric ones cost more or less as much as Xilica.
Looking for your experience and opinions.
I am facing a need for equalisation due to my directivity choice and involved drivers:
I want omnidirectional mids and high frequencies, plus dipole bass.
My choice of drivers is 2 x 2 BMS 18N862 (in configuration as in Celestion 6000), plus a pair of German Physiks DDDs.
Dipoles will need some equalisation, I still need to calculate exactly how much. I intend to equalise till 30-35 Hz, and cut at Fs (25 Hz). I will probably need up to 12 dB boost.
DDD drivers cover 200-20,000 Hz, but they need equalisation. Need to ask their maker for exact details, wondering if they need a notch filter or two.
I have a simple active crossover (dbx 234), and I can manage dipole equalisation using an PA amp (have Dynacord 1800L with DSP for that role).
Still, I need to equalise the DDDs.
DDDs could get passive circuits (an Italian review (on G. P. site) has the schematic as used in G. P. Borderland IV speaker).
Or I can add to the chain an equaliser, graphic (inexpensive) or parametric (not inexpensive).
Or I can go for a proper speaker management DSP tool like Xilica XP.
I hesitate to choose DSP, as that will mean extra AD / DA conversions; yet graphic equalisers have poor rep, and parametric ones cost more or less as much as Xilica.
Looking for your experience and opinions.
Hi Rudolf,
Of course you can always do a passive equalisation with high quality elements, but to determine your needs and further effectivity of whatever filters you´re using, I strongly suggest to get a decent microphone and REW, as this will take out quite some guesswork from your plans. At least it could bring you that far to attempt the last few "meters" of your journey by ear...
And OH! What a funny coincidence, I still have a Superlux 999 lying around... pass me a PM if you want it, will cost you a case of wine or whatever you might offer...
However, looking forward to learn more of the DDDs, a very interesting driver, and good luck with your project!
All the best
Mattes
Of course you can always do a passive equalisation with high quality elements, but to determine your needs and further effectivity of whatever filters you´re using, I strongly suggest to get a decent microphone and REW, as this will take out quite some guesswork from your plans. At least it could bring you that far to attempt the last few "meters" of your journey by ear...
And OH! What a funny coincidence, I still have a Superlux 999 lying around... pass me a PM if you want it, will cost you a case of wine or whatever you might offer...
However, looking forward to learn more of the DDDs, a very interesting driver, and good luck with your project!
All the best
Mattes
REW to start with, as Mattes says.
What is your primary source? If digital, you can easily do the EQ in the computer before it ever gets to analog.
What is your primary source? If digital, you can easily do the EQ in the computer before it ever gets to analog.
Tilt the dipole as required, and touch up the bass. Keep it restricted to the bass to begin with, except for broad voicing, assuming you have crossed properly.
Thank you for the replies!
Thanks for the tip on REW, I need to learn a thing or two about acoustic measurements.
I just came a cross a reasonable deal on a half-decent 1/3 octave EQ (BSS 966), +-15 dB range + shelving at extremes should be plenty for some experimenting.
I could EQ on the PC, but I more often than not use CDs, and I want to have equalisation also when I use my stereo for video content (never moved past 2 channels).
Thanks for the tip on REW, I need to learn a thing or two about acoustic measurements.
I just came a cross a reasonable deal on a half-decent 1/3 octave EQ (BSS 966), +-15 dB range + shelving at extremes should be plenty for some experimenting.
I could EQ on the PC, but I more often than not use CDs, and I want to have equalisation also when I use my stereo for video content (never moved past 2 channels).