June, 25th 2023
2:00 - 5:00 PM
June, 2023 Meeting
Please RSVP TO Perry at: firstname.lastname@example.org for address/directions (Oak Park area)
NOTE: Do click on the links below to get MUCH more information on all the speakers!
Perry Marshall is hosting the Chicago Audio Society on Sunday June 25th from 2-5pm. He will be demoing three Open Baffle (“Dipole”) speakers designs that he designed and built using Live Edge wood on three separate systems.
His “Live Edge Birch Dipoles” were featured on the January 2021 cover of AudioXpress magazine. 18” Eminence woofers, 8” Radian Coaxial midrange/tweeters, bi-amped with digital crossover. Constant directivity (this means frequency response is very controlled and highly consistent for excellent imaging everywhere in the room), linear phase and 97dB efficiency. Full details and photos here:
His “Bitches Brew Live Edge Dipoles” were featured in the Parts Express 2022 speaker design competition in this walk-around video:
They feature 2x15” SB Acoustics woofers and a 15” Fatal Coaxial midrange with 88mm compression horn tweeter. The system is a full range dipole on both front and back. Bi-amped with digital crossovers. Constant directivity, linear phase and sensitivity 100dB / 1M. Full details at:
His “Flanagangster” is a hybrid dipole-reflex - 100HZ and up is Open Baffle with Constant Directivity and bass is reflex for the bass section, achieved with two 12” woofers and the classic Audax 34mm dome tweeter with waveguide. Bi-amped with digital crossover. See photos and description on the DIY Audio discussion forum:
Perry worked for three years as an acoustical engineer at Jensen in the 90s where he designed speakers for Honda, Mazda, Ford and Chrysler, as well as a motional feedback subwoofer. You can see some of his other designs at www.perrymarshall.com/speakers. He’s written numerous articles for AudioXpress and Voice Coil Magazine.
Hope to see all of you this Sunday.
Bitches Brew speakers viewed from right front
Bitches Brew empty speaker cabinets
Bitches Brew closeup of right speaker cabinet