My Story These strange looking speakers were purchased from eBay. I found them when I was searching for coaxial speakers. I have never seen them before and I did not know much
about Trio brand at the time. I've perhaps paid for them more than
they were worth, but I liked the 80s look and the fact that
these were really rare. More importantly, I was curious how
these were going to sound...
As the name suggests, these speakers were made by Trio Corporation (in 1986
officially rebranded to Kenwood Corporation) and from what I've
gathered, they were only released to Japanese market. I recall
reading somewhere that the LS range was designed with studio
monitoring in mind, but not sure how much truth is in it. Feel
free to email me if you are able to provide some more info on
these rare speakers.
Look & Feel
I have to say - not everyone will be able to
appreciate the look of LS-77s. White speaker cones against black
enclosures look very 80s. But, I like them a lot. I always liked
the look of speakers like Yamaha NS-1000 or JBL 4310; and Trio
LS-77 remind me of both of these.
The enclosures are made from quite thick chipboard with one
internal bracing. They are finished in black worktop laminate -
not as nice as wood veneer but a lot more scratch resistant. The
speaker drivers are very neatly made with a lot of attention to
details. Glue is only where it needs to be and both diaphragms
and suspensions look very clean. Each speaker features a passive
radiator as well as coaxial driver. Coaxial driver means that we
have two diaphragms (HF
and LF) combined in one driver and working on the same axis,
creating a point source. Both drivers' and passive radiators'
baskets are made from die cast alloy with good amount of
‘breathing’ space. The cones are made from rigid paper suspended on fabric surrounds (will
not deteriorate with age). I'm not sure about the tweeter
diaphragms' material as at the time of testing I did not feel comfortable to
take these drivers apart. The tweeters are in-line with
bass cones and generate the sound via aluminium horns, which
expand horizontally (presumably to aid with stereo imaging). The
crossovers are hardwired but are very basic amd made from rather
poor quality components, which is really disappointing, as all
of the other speakers' components are well made. Treble
potentiometers are not the best quality but they seem to work
With an exception of couple of models, Japanese speakers do
not have a very good reputation in the UK. I personally do not
believe that country of origin has anything to do with the sound
of the speakers.
So trying to stay away from any stereotyping I've commenced
my test. First thing that I've noticed was the efficiency - a
lot better that what we can see from majority of modern
speakers. But nothing comes for free and high efficiency and
relatively small enclosure volume meant that the bass was not
going to go very low. And it didn't. It was quick, had a good
attack, was well controlled but never deep. If anything, I'd say
that the bass was a bit 'boxy'. Not something that people who
like full bodied sound would appreciate.
Midrange and treble were ok but there was nothing special
about them. Vocals sounded a little flat and string instruments
were a little coloured. Definitely not the most truthful
presenters. Level of details was ok, but they are number of
speakers that are a lot more detailed than these. Where these
speakers do really well is the attack, but when it gets to the
more 'emotional' stuff that requires engagement they really
struggle. Stereo imaging is good, however, the soundstage is
Not the most engaging speakers that can sound
flat at times. Very good attack though. Good if your are on a
tight budget and can pick them up for £50. If I was to keep
these for myself, it would only be for collector's purposes.
Balance of Sound:
Neutrality of Tone:
Please note - if you want to know what I
mean be the descriptions above, hover you mouse over them.
More detailed information will be available in separate
section of this website.