HISTORY:
Never heard of MORDAUNT SHORT? One of the better loudspeaker design and manufacturing companies formed in Great Britain (London) in the late 1960's and very proud of it! Mordaunt Short products were extensively labelled and marketed as MADE IN GREAT BRITAIN
Mordaunt Short (the company) was bought out by TGI around 1987, this is the same company that had also purchased Tannoy and Goodmans Loudspeakers.
Those who used and listened to their systems were not disappointed either, we had a nice Pageant system a LONG time ago and much later our studio guys wanted to listen to some MS20's to compare with their near-field Tannoys (mid sized bookshelf style) The MS20's were actually released during the period 1987 ~ 1993 in different "reincarnations" and I am pretty sure the set we had (and are now being offered as "organ donors") were from the early 1990's (TGI) period.
I have included a photograph of the rear label for identification purposes.
Rear ported, particle board sides/top/bottom and an extremely tight fit/secure polycarbonate/PVC front and rear - quite difficult to get "inside" and once there, I was stunned at the driver mounting used! It actually seems to be permanently embedded into the front panel! See my listing for the drivers to know more about what I found ...
I am clearing up ALL the ex studio and auxilliary equipment from our audio post production days, this MS20 SPARE PART is one of those items.
So what happened to the MS20's? (I hear you ask enquiringly)
They were often used by the sound engineer and "pushed" pretty hard, something that the MS20's don't like very much (much more suited to near field/lower listening levels) and as often happens, this resulted in one tweeter failing (burned out voice coil) After careful consideration I have decided that the usefulness of the MS20's was probably in the components it can provide rather than a complete non-functioning system, so here we go with this MS20 spare part ...
MORDAUNT SHORT - Loudspeaker Component ONLY
PART: Crossover Network Filter Board (1) NOT both channels, I believed this to be the most flexible option for users.
Part #: 3552 0028 (Issue 2)
Material: Single Sided PCB
Cabinet Rear input terminals connect directly to this board, although I have disconnected the terminals and they are NOT supplied (extremely difficult to remove from the cabinet)
SPECIAL NOTE: the MS20 is a bi-wired system (split system i.e the tweeter and driver can setup as a "split tweeter and driver system") joined together back at the terminals with a shorting connector (available separately HERE) You could either permanently short the terminals together at the board or run this board to 4x cabinet terminals, one pair for the tweeter and the other for the driver.
DIMENSIONS:
PCB: 75mm x 86mm x 35mm height (due to the large inductor)
Flying leads terminated with 5mm female spade connectors (Driver) and 3mm female spade connectors (Tweeter)
Driver is Black/Red wires
Tweeter is Brown/White wires
COSMETIC CONDITION:
NO damage to the PCB at all
Ready to roll!
TESTING:
Fully functioning prior to removal from the MS20 system
Component count is three passives only, these being:
EXPOTUS 1 Ohm 5 Watt wirewound ceramic
EVOX MMK Type poly capacitor 4.7uF 63V
Handmade (unidentified by whom) iron core wound inductor, measuring 1.02mH (2.0 Ohm DC resistance)
Since taking the photographs I have now placed this crossover board on a base of stiff cardboard and within a sealed plastic packet.
