Pair of SW120 Passive Radiators
inspiredsports
Posts: 5,502
Original matched pair SW-120 Passive Radiators from a pair of 1987 1B's. These 12" SW120 Passives were originally used in SDA-1, SDA-1A, SDA-1B, SDA-1C and SDA-2.
The Polk inspector's handwritten dates on the backs of the passives are 3/24/87 and 3/25/87.
I've done some research on these passives and there were a couple of different passives marked SW-120 from year to year. Some had a silver colored dome weight glued on the back (inside of cabinet) styrofoam section and some had a double-thick 12" foam layer on the front. These are the type with a double layer (12" circle of foam) on the front. I don't know if the different types were the result of cost-cutting or sound improvement.
$30 each / $59 pair shipped US and paid via PayPal.
Note: the brown gasket on the backs (middle image) is brown Mortite.
The Polk inspector's handwritten dates on the backs of the passives are 3/24/87 and 3/25/87.
I've done some research on these passives and there were a couple of different passives marked SW-120 from year to year. Some had a silver colored dome weight glued on the back (inside of cabinet) styrofoam section and some had a double-thick 12" foam layer on the front. These are the type with a double layer (12" circle of foam) on the front. I don't know if the different types were the result of cost-cutting or sound improvement.
$30 each / $59 pair shipped US and paid via PayPal.
Note: the brown gasket on the backs (middle image) is brown Mortite.
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Tuners w/mods Kenwood KT5020 / Fisher KM60
MF x-DAC V8, HAInfo NG27
Herbies Ti-9 / Vibrapods / MIT Shotgun AC1 IEC's / MIT Shotgun 2 IC's / MIT Shotgun 2 Speaker Cables
PS Audio Cryo / PowerPort Premium Outlets / Exact Power EP15A Conditioner
Walnut SDA 2B TL /Oak SDA SRS II TL (Sonicaps/Mills/Cardas/Custom SDA ICs / Dynamat Extreme / Larry's Rings/ FSB-2 Spikes
NAD SS rigs w/mods
GIK panels