Detailed instructions for use are in the User's Guide.
[. . . ] 5 MX 1000a . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 MX 1500a . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 MX 2000a . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 MX 3000a . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [. . . ] CLASS 1 WIRING MUST BE USED
BRIDGED MONO OPERATION: PLACE BRIDGING SWITCH ON INPUT PANEL TO BRIDGED POSITION. Shows signal is present Shows output capability is being exceeded, with clipping distortion Shows when the output is muted by protection circuitry.
NO SIGNAL
PWR SIG CLIP PROT
The "PROT" indicator lights whenever the output is muted. At turn-on, the amplifier mutes for a few seconds; at turn-off, it mutes immediately and remains muted until the power supplies have drained. This is normal.
Table 1: LED Display Operation
NORMAL SIGNAL
PWR SIG CLIP PROT
AC POWER
Any MXa Series amplifier can be wired for 100, 120, or 220240 VAC, 50 or 60 Hz operation. Unless it is specially ordered, each amplifier is configured for the line voltage in the market for which it is intended. For example, those intended for Japan are 100 VAC; for North and Central America, 120 VAC; for Europe and most of Asia, 220240 VAC. For 120-volt operation, the plug is a standard 15-ampere grounded NEMA fitting; it meets safety agency requirements for current consumption of less than 12 amperes during "normal" operation, but peak current draw under heavy usage can be much higher.
OCCASIONAL CLIPPING
PWR SIG CLIP PROT
The "PWR" LED is lit, and the "SIG" LED is lit or flashing. This is normal.
The "PWR" and "SIG" LEDs are lit, and the "CLIP" LED flashes on occasional peaks. This is normal.
STEADY CLIPPING
PWR SIG CLIP PROT
The "PWR", "SIG", and "CLIP" LEDs are lit continuously. The channel is in hard clipping, and you should reduce power immediately to avoid speaker damage.
THERMAL MUTING
PWR SIG CLIP PROT
The "SIG" LED is flashing, and the "PROT" LED is lit; this indicates that the protection circuitry is muting the output. The condition will reset itself when conditions allow.
KEY Not Illuminated
Flashing
Full Brightness
Figure 5: LED displays further explained.
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TROUBLESHOOTING
PROBLEM: Channel will not come out of muting · If reducing the gain control to attenuation does not release muting, the channel is defective or overheated (see "Overheating, " below). MX 1000a, MX 1500a, MX 2000a: Complementary linear stage with 2-step high-efficiency circuit MX 3000a: Complementary linear stage 3-step high-efficiency circuit 100, 120, 220-240 VAC, 50/60 Hz
AMPLIFIER PROTECTION
LOAD PROTECTION
OUTPUT CIRCUIT TYPE
POWER REQUIREMENTS POWER CONSUMPTION Normal operation: 1/8 power @ 4 per channel Maximum: full power @ 2 per channel Divide current by 2 for 220-240 VAC operation Normal Operation @ 120 VAC Maximum @ 120 VAC
4A 22A
5. 5A 29A
7. 5A 38A
<12A 58A
DIMENSIONS Faceplate Width Chassis Depth Faceplate Height (2 rack spaces) Faceplate Height (3 rack spaces) WEIGHT Shipping, Lbs Net, Lbs
Standard 19" (48. 3 cm) Rack Mounting 17. 9" (45. 5 cm) deep (to support rear ears) 3. 5" (8. 9 cm) 3. 5" (8. 9 cm) 5. 25" (13. 3 cm)
5. 25" (13. 3 cm)
49 lbs/22. 2 kg 42 lbs/19 kg
49 lbs/22. 2 kg 42 lbs/19 kg
62 lbs/28 kg 54 lbs/24. 5 kg
74 lbs/33. 8 kg 69 lbs/31 kg
OPEN INPUT ARCHITECTURETM LEVEL I
On the rear of an MXa or EX amplifier are an upper and a lower input panel; both are easily removable for future upgrades. This is the concept of Open Input Architecture, and the opening in which the panels mount is called the "slot". As installed at the factory, the lower is the MXa or EX standard input panel and the upper one is a blank. A ribbon cable connects the "slot" panels to the rest of the amplifier. It carries input signals, speaker output monitor signals, muting status, and clip activity; these are for supporting future accessories and remote control systems. Although the physical dimensions of the MXa and EX panels are the same, their internal cabling is different and the MXa platform does not support all the EX functions. The MXa Open Input Architecture slot thus is designated as "Level I" and the EX as "Level II. " The standard input panel shipped with each MXa Series amplifier has balanced 1/4" (6. 3 mm) RTS phone jacks and barrier strip inputs and the Parallel-Stereo-Bridge switch. The panel's circuit board has solder footprints for passive roll-off circuit components, input isolation transformers, and other special customizations.
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The MX-1 Input Expander panel may be installed in the upper panel position. Other accessories include a stereo precision attenuator (for the lower panel position) and a cinema crossover (for the upper panel position). More are in development.
PARALLEL, STEREO, OR BRIDGED OPERATION
The Parallel-Stereo-Bridge switch is located on the input panel, next to the input jack for channel 1). The most commonly used operating mode for a power amplifier is "Stereo, " in which the two channels are independent and separate all the way from input to output. [. . . ] On the MX 3000a, the thermal management circuitry controls the variable-speed fan according to how much cooling air flow is required. At and above 80° C, the thermal limiting circuit reduces the audio signal by up to 15 dB. At 85° C, the channel mutes to go into thermal protection.
VIII. TECHNICAL ASSISTANCE & SERVICE
Servicing your unit requires a trained technician capable of performing the type of service you need. [. . . ]