1. Gain knob
this knob controls input gain. Turn the knob clockwise, then the
input increases. Turn the knob counter-clockwise, then the input
decreases.
2. High knob
This is the treble control. You can use it to get rid of high frequency
noises or to boost the sound of cymbals or the high harmonics of
the human voice. The gain range goes from -10dB to 10dB with the
central frequency 10kHz.
3.Low knob
This is the Bass control. Boost male voice or kickdrum and bass guitar. Your
system will sound much bigger than what it is. The gain range goes from -10dB
to +10dB and the center frequency is 100 Hz.
6.VOL knob
This knob controls volume. Turn the knob clockwise, and the volume increases.
Turn the knob counter clockwise, and the volume decreases.
7.Zone selector
Z1, Z2,Z3,Z4 can be considered as signal assignment switches. Press the button
Z1 down and signal will be assigned to ZONE 1. Release the button and it stops
Assigning signal to ZONE1. Z2, Z3,Z4 can be operated in the same way.
8. Phone Volume
This knob controls the volume of Phone (refer to 7).Turn the knob clockwise,
and it increases the volume, and vice versa.
9.Phone
The signals of amplifier can be sent to a pair of headphones
through this socket.
10. Monitor Volume
This knob controls the output signal level to monitor output.
The Front panel
1
2
3
Phone
Volume
Monitor
Volume
Phone
8 9
10
3
4. Mute
It mutes the signals from the corresponding channel.
5. Mute LED
When the mute key is pressed down, mute LED lights up, and vice versa.
MON
Phone
Volume
Monitor
Volume
Phone
POWER
VOLUME
PL
MA-4075
Multizone PA. Mix Power Amplifier
MON
MON MON
VOLUME
VOLUME VOLUME
MUTE
CH 1 CH 2 CH 3 CH 4 CH 5
MUTE MUTE MUTE MUTE
ZONE 1 ZONE 2
ZONE 3 ZONE 4
Z3
Z1
Z2
Z4
Z3
Z1
Z2
Z4
Z3
Z1
Z2
Z4
Z3
Z1
Z2
Z4
Z3
Z1
Z2
Z4
Zone
Selector
Zone
Selector
Zone
Selector
Zone
Selector
Zone
Selector
VOL
BASS
TREBLE
GAIN
VOL
BASS
TREBLE
GAIN
VOL
BASS
TREBLE
GAIN
VOL
BASS
TREBLE
GAIN
VOL
BASS
TREBLE
GAIN
ON
OFF
MUTE
CH 1
Z3
Z1
Z2
Z4
Zone
Selector
VOL
BASS
TREBLE
GAIN
5
4
6
7
10
Note: Specification, design and appearance are subject to change without prior notice!
Model: MA-4075
Output p ower c apacity:
Frequency r esponse: 50-17000 Hz (-3dB)
Totalh armonic d istortion: Le ss th an 0.5%(1KHz-nomi nal pow er capacity)
Micropho ne: Bet ter th an 55 dB ra ted output
Line:b etter t han 6 0dB r ated o utput
Inputs / s ensitivity-impedance: CH1-3/X LRa nd 6.3m m combinat ion sock et: bal/unbal
M i c : - 4 2dB /-38dB-600ohm,bal/un bal.
L i n e : -26B/ -20dB-15Kohm, bal/un bal.
LINE I N/ s tereo R CA ja ck/ u nbalanced
CH4: -10dB 5 0Kohm
CH5: 0dB 50Kohm
Tonec ontrols: Ba ss 10dB-100Hz
Treb le 10dB-10KHz
Outputs f or s peakers / O hms: 4 oh m , 8 ohm
Outputs f or s peakers / V olts: 25V-70V-100V
Monitor o utput: 1Wrms
Phone o utput: 0.5 W i nto 47ohm
Line o ut: 1.2V
Controls: 5 Ga in contro ls for Ch1-5,
7 Volu me contr ols forCh1 -5, tel.pagi na, monit or, phone
4 Mas ter volu me control
5 Tre ble controls
5 Ba ss controls
5 Mute controls
4 Zo ne sel ect swi tch for ea ch channel
4 Zo ne moni tor sel ect switch.
Indicator: Pow er indicator
4 Zo ne output-le vel meter
1 Moni tor output-le vel meter
5 Mute indicators
Power s upply/ C onsumption: 115/2 30 V ac( 5% ) -60/50H z /400VA
Dimensions: 483mm( W ) x 132mm( H ) x 310mm(D)
SPECIFICATION
Signal/noise r atio:
1 AC select switch
RMS:40W 4; Peak output: 90W 4
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