INTRODUCTION:
For many years we had a pair of speakers designed and created by the multi-instrumental, progressive rock musician Bo Hanssen from Sweden.
Sure there are great loudspeaker systems made by "backroom boffins" who only deal in the technical details of loudspeaker creation but any musician wants that "sweet" sound and in Bo's case, if you can't find it then you produce it yourself.
Bo had the philosphy of creating high-end loudspeaker systems but at affordable prices! Depends what you call affordable, these were still VERY expensive systems in their day.
Sad about the choice of trade name (SINUS), perhaps it means something different in Swedish!
SINUS was Bo's early venture into "better sounding" loudspeaker systems before morphing into RAUNA of Sweden, then Bo went off on his own (creative artist differences with his partners - happens a lot in the music industry) and was the driving force behind Opus-3 and other systems such as the CaveRex, Okko, Huggin & Munin - watch out for these names, loudspeakers that will astound and surprise!
As luck would have it, Bo was getting set to ramp up production and it all ended very suddenly with his sad passing away in 2011.
If you find this sort of information fascinating (I do!) then take a look HERE for more nitty gritty (no dirt band) on Bo Hansen and his exploits in the world of audio.
So what happened Russ? (I hear you ask, head cocked to one side and one eye closed!)
I was offering our complete A 103D system but not much interest once people found out how much it would cost to have them shipped! Bo made the cabinets extremely sturdy and the result was loudspeakers that felt like they were made of steel!
I waited and waited but the "right person" didn't appear from the mists, I have now decided to use these lovely old A 103D's as a component farm - sad but at least someone else can proudly say "Mate, I have Bo Hanssen inside my speaker system ... listen, you can hear him playing!"
So hear we go with this SPARE PART for the SINUS A 103D (or your own custom loudspeaker design) .... Read and enjoy
SINUS (Bo Hanssen) - A 103D Loudspeaker System SPARE PART ONLY
Very briefly, the A 103D was rated at 100W RMS per channel, presenting a 4 Ohm Impedance Load to the amplifier
The configuration is 3 way - Bass, Mid Range and Tweeter.
The sound was "nice", I liked it very much but not just from the sound aspect but here was a loudspeaker designed by an accomplished musician! I like that ...
I did not sit down and work out the crossover design, my thought was that someone wouldn't be copying the original crossover but instead designing their own.
Made in Sweden
From all accounts, it would seem that Bo Hanssen manufactured his own speakers for use in the SINUS systems, I cannot find any information that suggests the contrary.
Circa 1970's
Part: Tweeter
The magnet rear has NO identification at all (unlike the driver and woofer)
Paper cone & centre "dust cover"
46.5mm diameter cone area
71.9mm diameter frame
36mm rear circular magnet
All metal, fully enclosed basket finished in matt Black
Single solder terminal (NOT spade terminal) on each side of the tweeter
OTHER DIMENSIONS:
71.9mm metal frame diameter with a 12.75mm "flange" which is used to mount the tweeter into a recessed cabinet cutout
Four mounting holes are 5mm diameter and 39.5mm apart (straight line measurement) from each other
Magnet extends 14mm from the rear and is 36mm diameter
I have two of these tweeters, the following description applies equally to both
Tweeter #1 Measured Value: 3R0 Ohm DC resistance - 0.01mH inductance
Tweeter #2 Measured Value: 3R0 Ohm DC resistance - 0.01mH inductance
I am 100% positive that these are 4 Ohm Z (Impedance) tweeters (in keeping with the driver and woofer which are known to be 4 Ohm Z), with my limited "test equipment" I can only measure the DC resistance and inductance.
COSMETIC CONDITION:
CLEAN
Cone, diaphragm is undamaged in any way (no depressions, no nicks, no cuts, no tears)
TESTING - HOW DO THEY SOUND?
Used for years in our SINUS A 103D loudspeakers, in a nutshell NICE! Good high end without being horribly "scratchy" or "thin" - reproduces those cymbal crashes etc quite nicely!
*** Where the photograph shows multiple components, this advertisement is for ONE tweeter only - not both that are shown! ***
That said though, if you purchase both tweeters there is an automatic discount applied
This tweeter has now been carefully packed into a sealed, plastic packet - cone down with a strong cardboard support base.
