Mutant Harmony MTHA4, User Manual

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For more information about car audio visit our website at
is a brand name of Armour Automotive Ltd.
For more information about car audio visit our website at
is a brand name of Armour Automotive Ltd.
Max Power (Watts)
60W 80W 60W 70W 90W 70W
RMS Power (Watts)
30W 40W 30W 35W 45W 140W
Impedance (Ohms)
4 ohm 4 ohm 4 ohm 4 ohm 4 ohm 4 ohm
Frequency Response
(Hz)
50Hz - 20KHz 50Hz - 20KHz 60Hz - 20KHz 50Hz - 20KHz 50Hz - 20KHz 40Hz - 20KHz
Magnet Size (oz)
8oz 10oz 7.6oz 10oz 12.5oz 20oz
Voice coil diameter
(inches)
1” Kapton 1” Kapton 1.2” Kapton 1.2” Kapton 1.2” Kapton 1.2” Kapton
Sensitivity (dB) dB (1W/1M)
86.500 87.000 84.000 86.500 88.000 87.000
Resonant Frequency
(Hz)
fs
99.540 58.086 106.734 86.575 81.210 61.077
Mechanical Q Factor Qms
3.772 4.081 5.561 5.376 6.980 3.971
Electrical Q Factor Qes
1.276 1.237 1.236 0.967 1.000 1.540
Total Q Factor Qts
0.953 0.950 1.011 0.820 0.875 1.110
Equivalent Volume
(mm3)
Vas
4.093 20.441 1.637 4.565 10.457 19.587
DC Resistance (ohms) Re
3.760 3.750 3.960 4.000 3.850 4.000
Effective Piston Area
(mm2)
Sd
7.800 13.800 5.200 7.800 13.800 20.500
Mechanical Mass (g) Mms
5.396 9.932 5.216 6.396 9.932 20.688
Mechanical
Compliance (um)
Cms
473.762 755.857 426.314 528.369 386.701 328.224
Force Factor ™ Bl
3.154 3.314 3.348 3.793 4.417 4.541
No (%) No
0.306 0.313 0.156 0.296 0.541 0.280
Krm (m ohm) Krm
122.672 581.624 45.832 92.937 122.538 120.416
Erm Erm
0.978 0.851 1.092 1.043 1.005 1.020
Mmd (Kg) Mmd
5.000 9.000 5.000 6.000 9.000 19.000
Kxm (mH) Kxm
4.279 4.449 2.284 3.690 5.049 3.213
Exm Exm
0.678 0.696 0.767 0.735 0.700 0.750