Harman MS-10SD2 Specifications, MS-10SD4, MS-12SD2, MS-12SD4, MS-15SD2, Thiele-Smallparameters

SPECIFICATIONS	MS-10SD2	MS-10SD4	MS-12SD2	MS-12SD4	MS-15SD2
Nominal diameter:	10 in (254mm)	10 in (254mm)	12 in (305mm)	12 in (305mm)	15 in (381mm)
Nominal impedance:	2+2 ohms	4+4 ohms	2+2 ohms	4+4 ohms	2+2 ohms
Minimum impedance @ 105Hz:	4.5 ohms	9 ohms	4.4 ohms	8.7 ohms	4.2 ohms
Power handling
Peak:	1,200W	1,200W	1,800W	1,800W	1,800W
Continuous music1:	600W	600W	900W	900W	900W
NBR2:	300W	300W	450W	450W	450W
AES3:	250W	250W	350W	350W	350W
Sensitivity (1W @ 1m):	87dB SPL	87dB SPL	87dB SPL	87dB SPL	87dB SPL
Power compression @ 0dB (nom. power):	3.8dB	3.8dB	4.5dB	5.0dB	3.6dB
Power compression @ –3dB (nom. power)/2:	2.8dB	2.8dB	2.5dB	3.3dB	2.3dB
Power compression @ –10dB (nom. power)/10:	2.7dB	2.7dB	0.5dB	1.8dB	1.0dB
Frequency response @ –10dB:	40Hz – 400Hz	40Hz – 400Hz	30Hz – 400Hz	30Hz – 400Hz	30Hz – 1kHz
THIELE-SMALL PARAMETERS
Fs:	34Hz	34Hz	35Hz	37Hz	29Hz
Vas:	1.30 ft3 (37L)	1.38 ft3 (39L)	1.73 ft3 (49L)	1.66 ft3 (47L)	4.58 ft3 (130L)
Qts:	0.39	0.48	0.73	0.86	0.82
Qes:	0.40	0.49	0.78	0.93	0.87
Qms:	16.49	18.56	10.08	10.45	13.25
Ho (half space):	0.35%	0.30%	0.27%	0.27%	0.36%
Sd:	51.16 in2 (0.03301m2)	51.16 in2 (0.03301m2)	78.59 in2 (0.0507m2)	78.59 in2 (0.0507m2)	128.52 in2 (0.083m2)
Vd (Sd x Xmax):	12.08 in3 (198cm3)	12.08 in3 (198cm3)	20.08 in3 (329cm3)	21.6 in3 (354cm3)	32.88 in3 (539cm3)
Xmax (max. excursion (peak) with 10% distortion):	0.23 in (6mm)	0.23 in (6mm)	0.25 in (6.5mm)	0.27 in (7mm)	0.25 in (6.5mm)
Xlim (max. excursion (peak) before physical damage):	0.77 in (19.5mm)	0.77 in (19.5mm)	1.15 in (29.3mm)	1.15 in (29.3mm)	1.15 in (29.3mm)
Atmospheric conditions at TS parameter measurements
Temperature:	77ºF (25ºC)	77ºF (25ºC)	77ºF (25ºC)	77ºF (25ºC)	77ºF (25ºC)
Atmospheric pressure:	1.047mb	1.047mb	1.047mb	1.047mb	1.047mb
Humidity:	51%	51%	51%	51%	51%

–1Power handling specifications refer to normal speech and/or music program material, reproduced by an amplifier producing no more than 5% distortion. Power is calculated as true RMS voltage squared divided by the nominal impedance of the loudspeaker.

–2NBR Standard (10,303 Brazilian Standard).

–3AES Standard (60Hz – 600Hz).

–Thiele-Small parameters are measured after a two-hour power test using half AES power. A variation of ±17% is allowed.

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