Recent content by kevinzoe

2234rew, I posted something that answered this question a while back so here is the info again: > 1st order (6dB/oct.) = 6.5 - 7.5 Audiolense xover filter width > 2nd order (12dB/oct) = 3.8 - 4.3 > 3rd order (18dB/oct) = 3 > 4th order (24dB/oct) = 2.6 The above are fairly accurate...

McCarty350 - I asked myself the exact same question and did some experimentation and came up with the following which should answer your question (or mostly answer it . . .) > 1st order (6dB) = 6.5 - 7.5 AL width > 2nd order (12dB) = 3.8 - 4.3 AL width > 3rd order (18dB) = 3.0 AL width > 4th...

Trdat, As the step response and frequency response and mathematical derivations of the impulse response, maybe we should take a step back and consider some early step fundamentals first . . . > when you take a measurement are the tweeter delay amounts (right most column) equal or within 0.04ms...

Peelbone, Are you saying that your measurement readings are inconsistent? Sometimes I have to close down the software then fire it up again and then it reads more consistent . . . if this is your issue. If you are getting consistent readings then move the sub towards the listening position...

Peelbone, Before you tackle the crossover between the subs and mains, I'd suggest you first time alignment everything because how a sound source drives a room is dependent on its location. Find and settle on your mains locations first. Then focus on the subs. Because you are using a 2...

I'm guessing that it's wave cancellation which occurs due to short wave lengths at higher frequencies. It's happened to me too. Just for fun, try and recreate the lower curve line (both speakers firing simultaneously) and when you see the dip again at 10khz, try moving the mic to the left or...

Software roadmaps are usually vague so as not to educate the competitors . . . You might get the answers / reassurance you seek via a private email exchange with Bernt. Just an idea . . .

Do you own a multi-channel DAC so that you can independently control each sub and each speaker for freq and time correction? If your answer is 'no,' then it likely doesn't matter because you are limited to just 2 channels (L and R) and any correction is a macro level one that covers that...

Boog, Thanks for sharing your REW freq response chart. Can you please confirm that the chart is without Audiolense FIR filter correction? Some thoughts . . . > your high freq roll off may be a result of speaker toe-in. Try changing the toe-in (or is it tow-in?) amount . . . > Sub timing based...

Boog You are realizing the constraint of having multiple sound sources but only two channels to do measurements and corrections via Audiolense. You can keep the subs on with the monitors and measure each channel separately but you'd have to do the sub timing outside of Audiolense and have it...

As you try different windowed settings remember that the upper window must be 2-3ms longer than the TTD window settings. For example the "Measurement and Correction Window" might be 9ms while the "True Time Domain Subwindow" would be 7ms or 6ms. My settings currently are: Measurement and...

Keep in mind you can pay Mitch for his help which would involve custom videos to walk you through the initial steps of setting up and starting to use AL. I did this and he was very helpful.

Ofer - I use Audiolense like you do to add my subs as separate left and right speakers so to speak. Have you tried playing with the "Measuremnent & Correction Window" and "True Time Domain Subwindow" lengths within the "Correction Procedure Designer" to improve the IR chart? Might be worth a try...

opps my bad - pressed return a few times by accident - sorry folks.

Dale (the OP): 2A) Is there a generally accepted metric or target for Audio System Room performance? I second the Acoustic Frontiers white paper and its frequency and time domain "standards." They may not be blessed by the audio Gods, but by God they're good things to shoot for . . . 2B) What...