RACK MOUNTING
The M•1400/M•1400i amp requires two rack space units (2 IU = 3.5"). It also requires 16.25"(M•1400) or 16.38" (M•1400i) depth inside the rack, including the rear supports. When designing your rack, put the heavier items at the bottom and the lighter items toward the top.
Secure the front panel of the amplifier to the front of the rack using four screws with soft washers to prevent scratching the panel. In ad- dition, because of the weight of the amplifier, you must secure the rear support brackets of the amplifier to the back of the rack. You could use a support rail or shelf across the back of the rack, or angle brackets attached between the rear support brackets and the rear rails of the rack. This is recommended for all components mounted in a rack that is going to be moved frequently (or thrown in the back of a pickup truck and transported down a bumpy gravel road to that outdoor festival!).
THERMAL CONSIDERATIONS
The M•1400/M•1400i amp is
The M•1400/M•1400i’s unique
AC POWER CONSIDERATIONS
Be sure the M•1400/M•1400i is plugged into an outlet that is able to supply the correct voltage specified for your model.
If the line voltage should drop below about 97% of the rated voltage, the M•1400/M•1400i will no longer be able to supply rated power. (It will continue to operate down to 50% of the rated line voltage, but it just won’t be able to reach full rated power.)
Be sure the AC outlet can supply enough current to allow full power operation of all the amplifiers plugged into it. The outlet should be a socket that matches the power cord.
WARNING: Bypassing the plug’s ground pin can be dangerous. Don’t do it!
The AC current demand of an amplifier varies depending on several factors, including the crest factor and the duty cycle of the program material. Under typical conditions reproducing rock music where musical peaks are just below clipping, the M•1400/M•1400i requires the following average currents:
| Average | Peak | ||
| Current | Current | ||
Amplifier Loading | Required | Required | ||
| 120V | 240V | 120V | 240V |
2 ohms per side or 4 ohms bridged | 8A | 4A | 25A | 12.5A |
4 ohms per side or 8 ohms bridged | 5A | 2.5A | 16A | 8A |
8 ohms per side or 16 ohms bridged | 3.2A | 1.6A | 10A | 5A |
|
|
|
|
|
It is recommended that a stiff supply of AC power be used because the amplifier places high current demands on the AC line. The more power that is available on the line, the louder the amplifier will play and the more peak output power will be available for cleaner, punchier bass.
Under typical conditions, reproducing rock music where musical peaks are just below the clipping point, you can safely connect more than one amplifier to an AC service. Use the table below as a guideline:
Maximum Number of Amplifiers
| on a 120V/15A Service |
Amplifier Loading | (or 240V/7.5A Service) |
2 ohms per side or 4 ohms bridged | 2 |
4 ohms per side or 8 ohms bridged | 3 |
8 ohms per side or 16 ohms bridged | 5 |
Due to
23