Where's the midrange by Gary Koh


Gary Koh of Genesis Advanced Technologies, Inc. just shared an interesting text. It's more then worthy of attention:

"It seems that the topic of "where's the midrange" comes up again and again. It's something that recording engineers understand perfectly (I would hope so anyway!!) and some audiophiles can't seem to get a grasp on because I get challenged on this all the time.

Because many 3-way loudspeaker designs have their midrange crossover to operate from may be 500Hz to 2,000Hz, audiophiles think that the midrange of music has to be there. Another tells me that the range from 120Hz to 450Hz is "not very important" so you won't need the best (most expensive) transducer for that range.

I'M SORRY! Middle C is 261Hz - based on modern standard concert pitch. Where does the pianist mostly play? His left hand in the octave below middle C and the right hand in the octave above middle C - from 130Hz to 522Hz."

Female vocals show their fullness at around 240Hz, but what is very important is that presence and recognition frequencies are from 2kHz to 4kHz. That's why a good midrange driver that covers both the fundamental frequencies as well as the presence frequencies of the human voice adds so much to the "attractiveness" of reproduction.

The "Warmth" frequencies are from about 130Hz to 230Hz and "fullness" brings that up to about 500Hz. So, in my design philosophy, I don't want to put a crossover at 250Hz. That would substantially split a piano in two. While it can be done, why split the right hand and the left hand of a pianist across two drivers unless you cannot find or design one driver that can cover that range? A crossover there also makes a cello sound like two different instruments.

This chart comes from:http://www.independentrecording.net/irn/store/irn/fcp.php
Mouse around the chart linked for lots of useful information to understand how the numbers relate to the music you hear.
They sell a professionally printed 24" x 18" poster of it that would look great in any listening room.

Matej Isak. Mono and Stereo ultra high end audio magazine. All rights reserved. 2006-2014. www.monoandstereo.com. ..:: None of the original written text, pictures, that were taken by me, links or my original files can be re-printed or used in any way without prior permission! ::..