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 although I have hunted down this word and not been able to find any meaning related to sound or audio!
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 they 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 .... 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
Most likely hand wound
Circa 1970's
Part: Medium Inductor (with metal support bracket)
I have two of these medium inductors and perhaps not surprisingly they are not EXACTLY the same value ... being hand wound and perhaps slight differences in the ferrite properties of the toroid core .... anyway please see below
Inductor #1 Measured Value: 2.10mH (1R8 Ohm DC resistance)
Inductor #2 Measured Value: 2.12mH (1R8 Ohm DC resistance)
NOTE: This is WITHOUT the U shaped metal support bracket fitted - when this bracket is in place, the inductance is up around 2.85mH for #1 inductor and 2.73mH for #2 inductor (even the metal bracket properties seem to differ slightly)
Toroid former wrapped in what looks to be a fabric tape doped in black - definitely very difficult to remove AND the winding is not continuous. You can clearly see a winding join on both inductors - no idea why it was made like this though!
DIMENSIONS:
65mm outside diameter 25.5mm inside "hole" diameter x 16.15mm width
Enamelled copper wire tails are 65mm length x 1.0mm diameter
Weight: 200g
COSMETIC CONDITION:
CLEAN
Undamaged in any way
Carefully removed from the cabinet. The crossover network is actually mounted directly onto a section of particle board with all wiring being made point-to-point and also using two tag strips. Everything was secured to this wooden base using wood screws, this is the reason for the metal brackets, the inductors were mounted "on their sides" lying vertical.
The tails have not been cut, exactly as removed from the cabinets.
*** Where the photograph shows multiple components, this advertisement is for ONE inductor only - not all that are shown! ***
This inductor is now packed into a sealed, labelled, plastic packet to preserve the condition.
If purchasing just one inductor, and it is important to your design parameters, please specify which inductor you would like (#1 or #2)
