SYMPHONIC AMPLIFIERS
I don't know much about
Symphonic Amplifiers at all. They were made in Montreal,
Quebec during the late1960's, and into the early 1970's. They were
definitely a 'budget' line, judging from the handful of different
'models' I have seen to date. I have a 'student' model which has
borrowed the circuit from an AC/DC radio! This means there is no
power transformer and an output transformer about the size of a gnat.
However, the model shown below is definately the most interesting
Symphonic amplifier I have owned/seen to date. Hopefully these
pictures will jog someone's memory. Do you have any
advertising or catalog inserts for Symphonic?


Do you know much more
than I do about these Canadian made amplifiers?
There are a few things to notice about these amplifiers, after
you've seen a few of them.
- They are always made rather crudely, with real point-to-point
wiring using the chassis as ground as often as possible. There are
very few terminal strips inside the thin sheet metal chassis.
- They use very simple circuits, with a minimal control layout.
Exceptional of this 'rule' is the crude 'mix' circuit, since it
adds the cost of one potentiometer. It works like so.....
'Mix' control (also
called 'Blend') adds a very unnecessary 98¢ potentiometer to
every amplifier.
- They are always rather low powered. The 2X6V6 example above
puts out about 10 watts RMS with 300VDC B+.
- As budget conscience as they are, the model above 'features' a
British made Richard Allen speaker. Who else has heard of Richard
Allen? I certainly hadn't, until I came across this amplifier, and
then paid attention when I came across Richard Allen speaker
advertising in the Canadian magazine Electron. The
advertisements all mention Hi-Fi Stereo speakers, and if I didn't
have this amplifier, I would have ignored the ads entirely. The
speakers were distributed in Canada by the William Cohen
Corporation, of Montreal. It makes sense to me, now. You always
buy locally first. Below are a few Richard Allen advertisements I
managed to uncover.


Imported Richard Allen
speaker advertisements. British tone on a budget!
- Regarding the speaker, note the RCA jack on the chassis. There
is a second RCA jack on the opposite side of the chassis, just on
the other side of the output transformer. Each jack is wired to a
tap on the output transformer. The 8-ohm (shown) is at the
'outside' edge of the chassis, whilst the 4-ohm tap (hidden from
view) is on the opposite edge of the chassis. To me this adds the
cost of one RCA jack and the labor of wiring it up, as well as
having the speaker 'cord' (a shielded RCA jack, no less) hanging
in front of the controls. Why? I suppose I could 'clean up' this
connection, and shorten the RCA cord by about 15 feet, but this is
how I got the amplifier, and this is just how I photographed it
for you to see. Check out the Richard Allan speaker below.
Interesting that a
little Canadian amplifier maker would use 'imported' British
speakers.
- They typically use the standard guitar amplifier tubes; 5Y3,
12AX7, 6V6, etc. However, this amplifier uses a 6AV6 for the
Tremolo. It is the only Symphonic amplifier I have seen (although
I haven't seen many) to have Tremolo.
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CANADA