SPH-135TC
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