michael chuaApril 27, 2018PRO DRIVERS55-2960, 8", MCM, Pro Woofer
MCM 55-2960 Thiele & Small Parameters
MCM 55-2960 RAW Frequency Response
Ported Box = 25 liters. Baffle Width = 13.5″
Mic at 36ins. On Axis. Impulse Window=5ms. No smoothing. Nearfield below 500Hz.
MCM 55-2960 Harmonic Distortion
Mic at 24ins. On Axis. Red=2nd Harmonics. Violet=3rd Harmonics.
Thiele & Small Parameters (before Break-in)
Ported Box=24 liters • Fb=55Hz (Manufacturer’s T/S)
Ported Box=20 liters • Fb=55Hz (Manufacturer’s T/S)
Sealed Box=20 liters • F3=84Hz • Q=0.71 (Manufacturer’s T/S)
Sealed Box=24 liters • F3=49Hz • Q=1.1 (DATS x0.75)
May 23, 2018 – Preliminary Listening Test in 25 liters Ported Box. (Port Dia=2″. Length=6.50″)
No crossover is used. Audition with woofer in RAW state.
Mid-Bass (80Hz-125Hz) – Dynamic. Detail. Tight. No Bloom.
Low Bass (40Hz) – Audible. No Bloom.
Vocals (125Hz upwards) – Sounds Flat. No audible peaks.
Bass and Vocals Balance – Good. Bass doesn’t over-power voices.
Conclusion
Despite the widely different Thiele & Small Parameters, the MCM 55-2960 sounds perfectly fine.
Suitable for PA and even HiFi. Fantastic value for $15.21.
Updated on Dec 8, 2023 |