15
11. SPECIFICATIONS
Notes
• The design and specifications are subject to change without notice for improvement.
• (D): Direct output, (T): Transformer output
• Accessories
Volume control cover YA-920 ............... 4
Blank panel ........................................... 7
Machine screw M3 x 8 ........................ 14
• Optional product
Rack mounting bracket: MB-25B
11.1. A-903MK2
8-channel mixer power amplifier
120 V AC, 60 Hz
30 W RMS
60 W
40 W
(D): 20 – 20,000 Hz, 0.5% THD
(T): 50 – 20,000 Hz, 0.5% THD
(D): 20 – 20,000 Hz, ±1 dB
(T): 20 – 15,000 Hz, ±1 dB
(T): 20 – 20,000 Hz, +1 dB, –3 dB
0.02% at 1 kHz, rated output
Eight input ports: each port accepts any input module.
One bridging input/output
Input port #1 to #8: 100 mV / 10 kΩ
Bridging input/output: 100 mV / 3.3 kΩ
1000 mV into 600 Ω / 1000 mV, 10 kΩ
Main (T): 4 Ω, 25 V and 70 V, balanced
Main (D): 8 Ω, unbalanced
AUX: 10 kΩ, 1 V
(D): Less than 0.5 dB, no load to full load
(T): Less than 1.0 dB, no load to full load
Master volume min.: 90 dB (Tone defeat switch: ON)
Master volume max.: 77 dB (Tone defeat switch: ON)
Power amplifier only: 105 dB (Tone defeat switch: ON)
Bass: ±10 dB at 100 Hz, Treble: ±10 dB at 10 kHz
8 Input gain control 1 Master gain control 1 Bass control
1 Treble control 1 Power ON/OFF switch 1 Tone defeat switch
1 Low-cut switch (60 Hz, 6 dB/octave)
1 Power LED, 1 Protect LED, 1 Signal LED, 1 Normal LED, 1 Peak LED
Self-protection, with AC fuse (inside)
Input 1 to 8: card-edge connector
Bridging, Mixer preamp. output, Power amp. input, Aux output: RCA jack
Mute, Remote VR: screw terminal strip
Output: screw terminal strip
AC outlet: 3-pin grounding type
AC power cord/plug: SJT, 3-prong type
–10 to +60 °C (12 to 140 °F)
Output disconnected for approx. 5 seconds after switching power on.
Black
420 (w) x 99.1 (h) x 318 (d) mm (16.54" x 3.9" x 12.52")
7.8 kg (17.2 lb)
Type
Power Source
Rated Output
Power Consumption
Rated output
Based on cUL standards
Power Bandwidth
Frequency Response
Total Harmonic Distortion
Input
Input Sensitivity/Impedance
Preamp OUT/Power amp IN
Output
Output Regulation (1 kHz)
S/N Ratio
(Band pass: 20 – 20,000 Hz)
Tone Control
Control
Indicator
Protection
Connector
Operating Temperature
Other Feature
Color
Dimensions
Weight
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