User manual RANE MA 3

[. . . ] If not, re-check connections, put on a better CD, and read more of the manual. WEAR PARTS: This product contains no wear parts. Manual-1 FRONT PANEL DESCRIPTION Heat tunnel exhaust vents are located on the left of the unit. When installed in a rack, make sure there is ample room for air to exit. The sealed heat tunnel design does not require the use of an air filter. OUTPUT HEADROOM meters indicate the amount of remaining headroom (how much more signal can be applied before Limiting occurs). [. . . ] Shield connection to chassis occurs via the screw found between the Input and Output connectors--keep this screw tight for improved EMI protection. When operating the MA 3 with unbalanced Inputs, be sure to keep cable lengths as short as possible. Refer to RaneNote 110, "Sound System Interconnection" (included in this booklet) for additional information. LEVEL controls adjust the input sensitivity for each of the three Amplifiers. The internal Limiters have maximum operating range (most amount of limiting before input overload) when the LEVEL controls are set to maximum. For best system noise performance, the input sensitivity may be reduced to send a "hotter" signal to the Amplifier. There are always tradeoffs to be made (better overdrive capability or lower system noise). For additional information see RaneNote 135 "Setting Sound System Level Controls" available from our website or upon request from the factory. The NORMAL setting (switch out) allows the MA 3 to deliver full rated continuous average power into 4 ohms, all Channels driven, with ambient room temperature of 22°C. Therefore, it is seldom, if ever, necessary to run the fan at the FAST speed. The exception might be a very hot environment and heavily compressed music into a demanding load. Heat tunnel air intake: The fan draws air in through the finger guard on the rear of the unit. The air flow is directed down a sealed heat tunnel and exhausts through front panel vents. No filter is required as air flow is directed through an unobstructed, sealed tunnel and will not contaminate internal circuitry. Manual-3 FEATURES & APPLICATIONS Built to be driven hard The MA 3 Amplifier drives all three Channels at the continuous average rated power, indefinitely. It is specifically designed to operate in demanding commercial applications. Very low emissions allow the Amplifier to operate in close proximity to signal processing equipment without causing excessive interference. The CP 31, CP 52, CP 64 and SRM 66 may all operate next to the MA 3 in a rack. The high efficiency "heat tunnel" design allows the Amplifier to process severely compressed signals reliably even when installed in a rack with elevated ambient temperatures. You won't hear other Zones The MA 3 is designed to deliver foreground music, background music and paging signals to three different Zones without annoying crosstalk. A quiet office, for example, with a paging signal only, will not hear foreground music playing in the lounge. [. . . ] It has the ability to instantaneously monitor the temperature of the power device die, yielding a level of reliability not achievable with discrete designs. 80 Hz Highpass Filters Internal jumpers allow independently selecting 80 Hz, 2nd-order Butterworth Filters for each Channel. These Filters are useful when using small bookshelf speakers or small constant voltage distribution transformers. Optional constant voltage distribution transformers Up to three 70. 7 V or 100 V constant voltage distribution transformers may be mounted inside the MA 3. [. . . ]