5 Mach Installation Series
A
C T I V E
M O D E
S E T T I N G S
Power handling
The active-mode power handling capacity of the individual drivers is shown in table 2. Power
handling is measured in RMS power. When specifying amplifiers for active mode, we recom-
mend that amplifier output be similar to the power handling figures.
Crossover points
We recommend that all 2-way top-boxes from M127i and up be crossed at 1.3 kHz. The 12” and
15” units are all optimized as mid/high units, enabling linear operation beyond the 1.3 kHz point.
Crossover slopes between the low/mid units and the horn should be 24 dB Linkvitz Riley.
Model
Driver
Power
Load
M127i
1” compression
50 W
16 ohm
12” low/mid
350 W
8 ohm
M129i
2” compression
80 W
16 ohm
12” low/mid (2)
700 W
4 ohm
M154i
1” compression
50 W
16 ohm
15” low/mid
500 W
8 ohm
M156i
2” compression
80 W
16 ohm
15” low/mid (2)
1000 W
4 ohm
M1502 mk 2
2” compression
75 W
16 ohm
15” woofer
400 W
8 ohm
Table 2: Power handling
