Can remember the stereo either, but I remember he always listened to it while enjoying a Tuborg.
Or sometimes a St. Pauli Girl, or Dos Equis.
For anyone interested in reading, MacDonald's 'Travis McGee' novels all had a color in the title, ie, "Nightmare in Pink," "The Turquoise Lament," "Pale Gray for Guilt," etc. He wrote other novels as well, some of which were translated into movies, eg, "Cape Fear," "The Girl, the Gold Watch and Everything," "Condominium," and a couple of the Travis McGee novels.
I believe I recall Travis eschewing the high end and going midfi in a later novel. I've always assumed the taste in audio and beer reflected MacDonald's own experience, and wonder what was on his audio shelf prior to his death in '86.
Found this excerpt from "Darker Than Amber":
"As it was very still and very hot, I got the big auxiliary generator going, and we buttoned up the boat and put the air-conditioning on high. The fading day put an orange-gold light through the starboard windows of the lounge. I briefed her on the music machinery, and after she couldn’t find anything she liked among my tapes or records,
I put the FM tuner into the circuit and she prowled the band from end to end until she settled for a Hollywood station whanging away at what Meyer terms beetle-bug mating chants. She boosted the bass and put the gain slightly below torture level. My big amplifier fed the rackety-bang into the big wall-mounted AR-2a stereo speakers, giving us all the resonances and overtones from twenty cycles all the way up to peaks no human ear can detect."
http://www.e-reading-lib.org/chapter.php/129498/0/MacDonald_-_Darker_Than_Amber.html
And this, the author speaking of himself:
Regarding music tastes, in 1969 John D. told his biographers and
friends Len & June Moffatt,
"I just ... checked the records most recently played, and find a
most catholic assortment: Billie Holiday, La Misa en Mexico, Simon
and Garfunkel, Pable Casals, Modern Jazz Quartet, Brubeck, Chicago,
Ohana - Concerto for Guitar and Orchestra, Eydie Gorme & Trio Los
Panchos, Illya Darling, Tatum, Bach.
"I guess I like all music that has enough quality of invention,
guile and surprise so that I get a feeling of pleasurable amusement
when they fit the pieces together in a way I could not have
anticipated.
I have good stereo equipment, and built a lot of the
pieces of it myself. Most 33 1/3's have some dreary (tracks)
thereon. So I tape to eliminate the drearies, and because
I
scrupulously clean tape heads and demagnetize, the per-play loss of
quality on the tape collection is infinitesimal compared with the
loss resultant from needle play, even on the Marantz turntable."