the TA-1150 looks more gimmicky than its TA-1130
elder, thanks to its linear vertical volume
slider, it is in fact a step further into full 1970s engineering
- even 1980s if one considers the power transistors that were used.
SEPP-OTL, balanced differential power supply, DC preamp section
with complementary low-noise transistors in each EQ and tone amplifiers.
And the eight power transistors themselves aren't the usual bulky
TO-3 boxes but modern devices which could fit onto the heatsinks
of a TA-N77ES
or a Marantz SM-80
- in 1972 !
the Sony TA-1150 was well endowed, even going as far as integrating
4-CH compatibility (by way of a dedicated loop), allowing the separation
of the pre and power sections (by way of another dedicated loop)
and keeping the "center" output that was on the
original 1965 ES TA-2000
and which the TA-1130 didn't have...
The rest is more common : plenty of sources, low & high filters,
turnover frequencies for the bass/treble controls etc. All steel
and aluminium - no plug-in cards but built like almost everything
still was then : sound & solid.
as the earlier TA-1130 or the original TA-1120
(and variants), the TA-1150 sold amazingly well all over the planet,
along its dedicated ST-5150
Variants of the TA-1150 are the TA-1140 (depending on market) and
a later TA-5150D which added minor circuit revisions in 1974 - the
worldwide TA-1150 probably is the equivalent of that TA-1150D. Gradually
replacing this very successful series was the 1st V-Fet
generation in 1974, then the TA-F6B
in 1976, then the "new world" TA-F80
the TA-1150 was part of Sony's first "all together" system
: the well-known Listen 5. There was
no Listen 3 because, at that higher
price point, serious audiophiles don't buy all-in-one packs - however