All systems operational. Royal Mail industrial action 30/9 & 1/10 - postal delays expected.
A 135mm / 5¼" midwoofer with 2 separate 8 ohm voice coils wound on a single voice coil former that can be configured for 4, 8 and 16 ohm applications; an excellent replacement unit for the Mission 751 and 753.
Featuring a mineral loaded (carbonised) polypropylene cone with a high internal damping factor, this highly adaptable unit offers a flat extended response and is an excellent replacement for the Audax HD13B 25H-2C12 16 ohm as found in the classic JR150 loudspeaker.
|Resonant frequency (fs)||40 Hz||Nominal impedance (Zn)||2x 8 Ω|
|Mechanical Q factor (Qms)||3.44||DC resistance (Re)||2x 7.5 Ω|
|Electrical Q factor (Qes)||0.48||Max power handling||2x 60W|
|Total Q factor (Qts)||0.42||Sensitivity (2.83V/1m)||85 dB|
|Equivalent volume (Vas)||16L||Chassis diameter (pincushion profile)||135 mm|
SPH135TC, SPH 135TC