User manual

MAX Data Sheet MAX
REMOTE
LO IMP
DELAY ON
CUT
HFA
SPKR
21 3456 87
LO IMP
1
REMOTE
21 3456
234
ONON
Frequency response correction of HFA circuit
(only available with E-PAC version 2)
-5
0
5
10
-10
-15
-20
-25
-30
20 100 1k 10k
20k
E-PAC version 1 E-PAC version 2
E-PAC Configuration for LINEAR mode
AMP-L module switches
CUT switch and indicator
Set to CUT, a high pass filter with a 130 Hz cut-off frequency is
inserted in the controller signal path. The yellow CUT LED
illuminates. MAX is now configured for use with d&b C-Series
active subwoofers.
Operation with E-PAC
To drive MAX cabinets the E-PAC has to be configured to LINEAR
mode by setting the appropriate DIP switches on the rear panel.
In LINEAR mode all four pins on the Speakon connector are driven
by the E-PAC power amplifier, pins 1+ and 2+ carry positive
signal, 1– and 2– carry negative signal. MAX loudspeakers can be
used in either four wire or two wire configuration.
The E-PAC can drive a single MAX cabinet at an output power of
300 watts. The rear panel LO IMP switch configures the E-PAC to drive
two MAX cabinets with a 6 dB reduction of input level to the speakers.
DIP switches 1 and 2 respectively allow CUT and HFA settings to be
selected (only with E-PAC version 2). The characteristics of the CUT
setting are explained above under "AMP-L module switches".
HFA setting
In HFA mode (High Frequency Attenuation), the HF response of the
MAX system is rolled off. The HFA circuit configures MAX to
provide a natural, balanced frequency response when a unit is
placed close to listeners in near field or delay use.
High Frequency Attenuation begins gradually at 1 kHz, dropping
by approximately 3 dB at 10 kHz. This roll-off mimics the decline in
frequency response experienced when listening to a system from a
distance in a typically reverberant room or auditorium.