RALPH MORRIS' SYSTEM

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Ralph Morris' Home Theatre System
 

 

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 frame!

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