Adamson M15 - Manual (Page 6)

M15 User Manual Page 6 of 24
Active/Passive Operation
In full range mode with presets the frequency response of the M15 is 60hz-18khz with a +-db variation factor.
The crossover point between low and high frequency components is 800hz. . Always use presets when operating the M-
15, whether in active or passive mode.
Adamson recommends powering the M15 with a Lab.gruppen fP400 stereo amplifier producing 1100w per channel
@8ohms, and providing AC, VHF, thermal, DC and clip limiting protection.
In passive mode, up to two cabinets can be linked on one channel. In passive mode all signals are routed to one
channel of the fP400.
To select active mode, switch the protected toggles on the rear of the cabinet.
With the bi-amped setting, you enable up to two cabinets to be powered by two channels of a single fP400. In a 2-
way active configuration the LF and HF signals are routed sepearately to the amplifier channels.
It can also be paralleled to other M15’s through four NL-4 Speakon connectors. Using one of the four connectors for the
speaker input allows a second connector to function as a feed to jump additional cabinets.
1. Remove the backplate to access the dipswitches. Choose active or passive mode and replace the cover with the
indicator facing the appropriate direction.
1. exposed dipswitches-Ensure
that both switches are set to either
active or passive mode at any
one time.
In passive mode , Pins 1+/1- of all four
NL4 connectors feeds the full range signal
to the High and Low frequency drivers,
through their own passive crossover units.
In active mode the Lap.gruppen
fP400powers up to two cabinets. Pins
1+/1- of the four connectors carry the
LF signal and pins 2+/2- of the four
connectors carry the HF signal. The pin
configuration is automatically changed
when Bi-amped active mode is selected.
M15 Active M15 Passive
Section .0