In 1992 he accepted the chief engineer position at Apogee Sound where he designed the DA Series Class-H digitally controlled amplifier, winning the 1994 TCI Product of the Year Award.

[2] Along with a few other high-scoring recruits, he was placed in the United States Atomic Energy Commission's Advanced Nuclear Power program, through which he studied electronics, metallurgy, calculus and physics.

At Mare Island Naval Shipyard, he helped commission and launch the nuclear-powered USS Plunger, at the time the largest and most advanced attack submarine.

Also for Beatlemania, Cavin modified the Electro-Voice 1776 vocal microphones to have less distortion by rebiasing the internal FET and changing the output capacitor.

[5] The JM-3 was the first full-range integrated electronically controlled loudspeaker system used for live sound, a category that expanded greatly in the next ten years.

[6] Cavin led the McCune engineering team in creating the MM-4, the first mixing console intended solely for stage monitors.

Another project was the MC-8 mixer for front-of-house, with 22 inputs, 2 effects sends and returns, 8 subgroups and 4 main outputs, built by McCune engineer Istvan B.

Cavin designed an active all-pass network to time-align the passbands, slightly delaying the low frequencies to match the highs.

Cavin's proprietary improvement to the Altec 604 compared favorably with the same concept implemented via passive components by Ed Long for the contemporary UREI 813 studio monitor: his trademarked Time-Align process.

[12] Cavin toured and provided technical support for Burt Bacharach in the 1970s, including dates in South America 1978, with Harry McCune Jr mixing and Terry Simmons on the crew.

[18] In collaboration with Don Pearson of Ultra Sound/Pro Media, Cavin designed the AIS-10, a very low noise audio interface enabling Smaart users to route microphone and line level signals for testing sound systems.

Cavin liked to go fishing; in 1967 he caught a 150-pound (68 kg) sturgeon in the San Francisco Bay off the north side of Tiburon Peninsula, after an hour-long struggle using 18-pound test line intended for striped bass.