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RE: Key... Active measurement Assistance...

Posted by BigguyinATL (M) on October 13, 2016 at 09:26:32

In Reply to: RE: Key... Active measurement Assistance... posted by Davey on October 13, 2016 at 08:51:11:

Well my experience is otherwise. even if you want to mimic the existig transfer function you have to measure whet the transfer funtions are (not just the component values, because the driver has to be measured as pare of the transfer function. Even level matching LF to HF is better done with measurements - or at the very least customized band limited pink noise signals and the ability to quickly compare levels. but even you mind is terrible at distiquishing tone difference as your memory gets biased. This requires more rigor tobe employed in your set up. You have to listen to the HF noise signal first and then climb the LF noise signal to match, the repeat with the LF Fixed and adjust the HF upward to match and see how the end results compare - they were different by a couple dB each time I tried it... Using measurements before and after is far easier, and you likely can spend less than you cable budget to rent a very high quality measurements device... See link - Full disclosure I work for B&K

Of course, the great advantage of a Active crossover is veer away from the manufacturers design and see if you can make it better! The mananufacture always applies some limitations in the crossover design - related to cost, physical layout of the transduser - and let listening room may also place some restrictions on the performance with the standard passive design. With my MMG's I tried steeper slopes and higher and lower crossover frequency. I ended up with a bit higher crossover (1100Hz) and 24dB/Oct slopes and added a EQ and HP filter to better integrate with my subwoofers.

"The hardest thing of all is to find a black cat in a dark room, especially if there is no cat" - Confucius

• https://bksv.com/en/products/sound-and-vibration-meters/soun   (Open in New Window)

Edits: 10/13/16

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