Ralph Morris is a former
Director of Marketing for Tycobrahe Sound, one of the pioneering tour sound
companies. His recollections of his involvement in the professional market
can be found here.
Above is a photo of my new home entertainment system. My digital camera
isn't very wide-angle, so I could only get one side of the system in
The Tycobrahe M-2 speakers consist of JBL studio monitor components
mounted in custom enclosures of my own design. The 2215 low-frequency
transducer operates in a bass-reflex enclosure of 13-cubic feet internal
volume, with the port area equal to the effective piston area of the
transducer. This provides optimum rear loading, and results in the enclosure
having a tuned frequency at 50 Hz. The bi-amp system has a 2420 driver with
2391 horn and acoustic lens, plus a 2405H (slotted) tweeter. The enclosures
stand six feet tall, and measure 22-1/2 inches wide by 20 inches deep.
Power for the 15-inch transducer is provided by a Phase-Linear 400, and a
Dynaco ST-120 powers the mid-range driver and tweeter. A home-made 12
dB/octave passive crossover with an adjustable L-pad is used to cross over
the mid-range driver and tweeter at 10 KHz.
The line-level crossover is also home-made, and provides 12 dB/octave slopes
at 900 Hz. The front end is a Dynaco PAT-5 preamplifier and Dynaco FM-5
tuner, plus a Dynaco SE-10 graphic equalizer.
The sound is just about as close as it gets to live. As a retired concert
sound engineer, I like to be able to turn it up and still hear what I call
"the quiet between the notes."
© 2003 Ralph Morris