User manual BIAMP EQ-140, EQ-220, EQ-230, EQ-290 MX-2, MR-140, SX-35, SX23

[. . . ] Refer all servicing to qualified service personnel. Servicing is required when the apparatus has been damaged in any way, such as power-supply cord or plug is damaged, liquid has been spilled or objects have fallen into the apparatus, the apparatus has been exposed to rain or moisture, does not operate normally, or has been dropped. Do not install near any heat sources such as radiators, heat registers, stoves, or other apparatus (including amplifiers) that produce heat. Do not defeat the safety purpose of the polarized or grounding-type plug. [. . . ] The standard fuse is held in the clip, and becomes the actual AC fuse when the Fuse Clip is installed. Replace the standard fuse only with the same value and type. For ~115 VAC operation, use a T 10A L 250V fuse. For ~230 VAC operation, use a T 5A L 250V fuse. Voltage Selector Switch: For 115 VAC operation, slide until 115V is displayed. For 230 VAC operation, slide until 230V is displayed. Channel Level Controls: These controls adjust the input signal level for each channel. After setting appropriate levels at the signal source, then adjust the Channel Level Controls for the desired output volume from the EQ-140, EQ-220, EQ-230, EQ-290 MX-2, MR-140, SX-35, SX23. In mono-bridge mode, Channel 1 becomes the active input and Channel 2 input is inactive. As an option, the Channel Level Controls may be mounted to the EQ-140, EQ-220, EQ-230, EQ-290 MX-2, MR-140, SX-35, SX23 front panel. CAUTION: Disconnect the EQ-140, EQ-220, EQ-230, EQ-290 MX-2, MR-140, SX-35, SX23 from AC power before removing the top panel. Ground Lift Switch: This recessed switch allows the circuit (signal) ground to be lifted (disconnected) from the chassis (AC) ground. This can help prevent hum inducing ground loops within the sound system, while maintaining safe AC grounding of the chassis. 7 70V MONO-BRIDGE OUTPUT When using a EQ-140, EQ-220, EQ-230, EQ-290 MX-2, MR-140, SX-35, SX23 to drive a distributed 70V speaker system, a distribution transformer at the output of the amplifier is not required. The EQ-140, EQ-220, EQ-230, EQ-290 MX-2, MR-140, SX-35, SX23 is capable of driving a 70V line directly. In order to protect the amplifier (and in case of amplifier failure, the speaker transformers) one side of the 70V line must be capacitively isolated as shown below. This is necessary since the bandwidth of the EQ-140, EQ-220, EQ-230, EQ-290 MX-2, MR-140, SX-35, SX23 extends well into the low-frequencies, and some protection is required to keep the amplifier from seeing the extremely low impedance of the 70V line below 100Hz. The two 100uF / 100V non-polar capacitors wired in parallel form a High Pass Filter at 100Hz. In addition, they provide DC protection in case of amplifier failure. Any equalizer in the signal path should not have the low-frequencies boosted, since this will excessively load the amplifier. All bands below 125Hz should be flat or cut only. If more low-frequency is needed, a directly driven sub-woofer should be used to extend the low-frequencies below 100Hz. 325W/4 output 2 325W/4 output 1 --- + + --- 100uF 100V nonpolar 100uF 100V nonpolar speaker negative speaker positive 8 PRECAUTIONS Be sure that power to the EQ-140, EQ-220, EQ-230, EQ-290 MX-2, MR-140, SX-35, SX23 is turned off when making all connections. High voltages can be present at the speaker terminals, and static pops or broken ground connections on cables can cause speaker damage. [. . . ] Once power is turned on, slowly advance the level controls clockwise. If no sound is heard, turn the level controls back to their original counter-clockwise position and check to confirm there is an input signal. Also check for proper wiring at all input and output connections, and verify that the cables being used are undamaged and are in good condition. If the EQ-140, EQ-220, EQ-230, EQ-290 MX-2, MR-140, SX-35, SX23 should require service, please contact Biamp Systems Customer Service at 1-800-826-1457 or (503) 641-7287. 9 SPECIFICATIONS Maximum Power Output @ 2kHz (120 VAC) both channels driven into 4 ohms both channels driven into 8 ohms mono bridge into 8 ohms Signal-to-Noise Ratio (0-30kHz) rated power into 8 ohms Total Harmonic Distortion 20Hz-20kHz @ rated power 2kHz @ rated power (typical) Intermodulation Distortion (SMPTE) Frequency Response (20Hz-20kHz) Input Impedance balanced unbalanced Sensitivity Power Requirements Power Consumption Dimensions height (3 rack spaces) width depth Weight 5. 25 inches (133mm) 19 inches (483mm) 11 inches (279mm) 33 lbs. [. . . ]