Recent content by Shonver

Antonio, thanks again for sharing your project progress. I just re-read the thread and was wondering about the compatibility with or, otherwise, choice of calibrated microphones that will work with your sound card. The 48V phantom powered mics are common, while you have mentioned a specific...

Congratulations on achieving this milestone, Antonio. I am following your project with great interest.

Impressive! What is the performance baseline of this version, and what improvements to you anticipate with the next version?

I have not tried something like this before. Will have a look, thanks.

How might one apply the correction factor described by Joe D'Appolito described in his AudioExpress article here (below)? If not currently possible, is it a function that can be added to REW? Link: Measuring Loudspeaker Low-Frequency Response

The steepest I have used is 24dB/oct. I believe that the steeper filters require more care over the crossover region.

You might want to consider response shaping, (A.K.A. equalisation). Besides replacing your woofers you could also look at applying bass boost. If your 8 inch mid is handing a full-range signal with no problem, it implies that your listening levels are benign. This furthermore implies that your...

As a DIYer you are free to take whatever approach you choose. I can only advise according to my own beliefs. FWIW, I believe that to measure is to know; so my advice for a next step is to get a measurement mic. At the least you will be able to see graphically the effects that your tweaks are...

What you plan to do will improve matters, due to having better control over the woofer. However, your overall approach is flawed. Presumably, your reason for going open baffle is to achieve superior sound quality to what an enclosed speaker does. From what I can see, you are doing One Good...

I don't know what the specific capabilities of your DSP power amps are but - generally speaking - this would be my approach: As a start, the DSP would ideally have a crossover section (3-way in your case) plus a system EQ. Edit 2: some DSPs have "system EQ" as multiple, selectable voicings/room...

Thanks, John.

I just realised that the calibration certificate of my analogue microphone may contain the information required to enable one to do a calibration for absolute SPL without the need for an SPL meter. My mic's sensitivity has been measured to be -41.3dBV. This translates to 8.61mV for 94dB SPL...

This latest feature really rounds off REW as a complete measurement system (at least, to my requirements). I have had REW installed on my PC for some years, but rarely used it. The improved calibration with lead compensation raised its performance and finally converted me. I saw your...

Excellent work! :T

Inductor1 May 13.mdat - air core; hand wound 0.61mH-ish.mdat - small laminated core; tight, neatly wound 1.16mH-ish.mdat - larger laminated core; tight, neatly wound 2.8mH-ish.mdat - larger laminated core; tight, neatly wound 4.9mH-ish.mdat - air core; hand wound