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Frequency Response And Distortion - Pro DG Systems MA 12 User Manual

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THIELE-SMALL PARAMETERS*
Resonant frequency, fs
D.C. Voice coil resistance, Re
Mechanical Quality Factor, Qms
Electrical Quality Factor, Qes
Total Quality Factor, Qts
Equivalent Air Volume to Cms, Vas
Mechanical Compliance, Cms
Mechanical Resistance, Rms
Efficiency, η0
Effective Surface Area, Sd
Maximum Displacement, Xmax **
Displacement Volume, Vd
Voice Coil Inductance, Le @ 1 kHz
Note: On axis frequency response measured with loudspeaker standing on infinite baffle in anechoic chamber, 1W @ 1m
42 Hz
Overall diameter
5,8 Ω
5,6
Baffle cutout diameter:
0,30
- Front mount
0,28
91,1 l
229 μm / N
2,9 kg / s
2,2 %
0,053 m2
6,3 mm
334 cm3
1 mH
8
MOUNTING INFORMATION
Bolt circle diameter
Depth
Net weight
* T-S parameters are measured after an exercise period
using a preconditioning power test. The measurements
are carried out with a velocity-current laser transducer
and will reflect the long term parameters (once the
loudspeaker has been working for a short period of
time).
** The Xmax is calculated as (Lvc - Hag)/2 + (Hag/3,5),
where Lvc is the voice coil length and Hag is the air gap
height.
FREE AIR IMPEDANCE CURVE
FREQUENCY RESPONSE
AND DISTORTION
312 mm (12,28 in)
294,5 mm (11,59 in)
278 mm (10,94 in)
131 mm (5,16 in)
5,5 kg (12,12 lb)

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