SEAS, MCA12RC, H1304

MCA12RC (H1304) 4.5″ Coated Paper Midrange

The Seas MCA12RC is a 4.5″ coated paper cone midrange with a mechanically matching natural rubber surround. The result is an unusually smooth midrange response. The stiff injection-molded basket has large windows and a raised spider to reduce sound reflection and airflow noise. A 1″ high-temperature voice coil wound on an aluminum former ensured high power handling capacity. The frequency response extends to 10,000 Hz, indicating this driver is not overly damped and will have a good upper midrange response.

Outside diameter 120.4mm
Cut out 95.8mm
Depth 55.5mm
25.4mm = 1″ = 2.54cm

Nominal Impedance 8 Ohms
Recom. frequency range 400-5000 Hz
Short-term max. power 400 W
Long-term max. power 110 W
Sensitivity (1W/1m) 86 dB

Voice Coil Diameter 26 mm
Voice coil height 5.8 mm
Air gap height 4.0 mm
Linear coil travel (p-p) 1.8 mm
Max. coil travel (p-p) – mm
Magnet weight 0.25 Kg
Total weight 0.66 Kg
Voice coil resistance 6.3 Ohms
Voice coil inductance 0.31 mH
Force factor 4.2 N/A
Free air resonance 68 Hz
Moving mass 5.58 g
Suspension compliance 1.2 mm/N
Suspension mech. resistance 0.85 Ns/m
Effective piston area 55 sq. cm