User manual HAFLER GX 2300

[. . . ] Table of Contents DECLARATION OF CONFORMITY . . 9 What else distinguishes these amplifiers?. 21 SERVICE POLICY AND LIMITED WARRANTY . provide the same three wire grounded connection. [. . . ] This thermally-tracking fan speed circuit keeps fan noise to a minimum when power demands are low. Typically the fans will be turning slowly even at idle conditions - although abnormally low room temperatures may allow the fans to turn off completely. The fan control circuit also has a turn-on blast feature that runs the fans at full speed for a few seconds every time the amplifier is turned on. This serves the dual function of cleaning out the air tunnel, and providing a simple means to check the fans for proper operation. If you suspect that the fans are not operating correctly, try turning the amplifier off, then listening or feeling for the turn-on blast when the amplifier is turned back on. Thermal Standby - If excessive heatsink temperature is detected, the individual amplifier channel will go into thermal standby mode. The amplifier will be turned off, and the THERMAL LED illuminates until heatsink temperatures return to normal. At that time the amplifier automatically turns back on, and continues operating normally. NOMAD protection - The amplifier output MOSFETs are protected from excessive power dissipation by NOMAD protection circuitry. NOMAD (Non-Multiplying Advance Decision) limits the power when it measures signal voltage and current conditions that will exceed the pre-determined power limit of the MOSFETs. This instantaneous power calculation is performed on each output MOSFET, causing the amplifier to automatically limit power when needed. In this way, a speaker load with an impedance "dip" over a particular frequency range will only activate the NOMAD protection when sufficient audio is present at that same frequency range, but continue operating normally otherwise. Short protection - The NOMAD protection circuit also protects against shorts, and will instantly limit the output power if speaker wires are shorted together. Normal operation will continue immediately after the short is removed. Power Supply Current Limiting protection- The switching power supply will protect itself from excessive power dissipation by continuously monitoring currents in the switching MOSFETs. The Current Limiting circuit measures the currents in the switching MOSFETs and will instantly limit them to a safe level. Soft turn-on/fast turn-off - Speaker loads are protected from turn-on/turn-off transients by a circuit that monitors the power supply, and controls the amplifier when power on/off events are detected. At turn-on, this circuit waits for power supply voltages to settle, then sends a turn-on ramp signal to slowly turn the amplifier on. At turn-off, this circuit acts quickly to turn off the amplifier before power supply capacitors discharge, and voltages collapse into the output signal - causing speaker "pops". ­ 10 ­ Design Features -18-15 -12 -21 -9 -24 -6 -27 -3 -32 -38 OFF 70V 100v 4 8 2 CH A signal Channel A 0dB protect Load Power Stereo Mono 70V 100V -18-15 -12 -21 -9 -24 -6 -27 -3 -32 -38 OFF 2300 clip thermal 70V 100v 4 8 2 CH B Channel b 0dB 1 9 2 3 12 HP ­ 4 180°­ 0°­ 6 0"6"12"18"24"30"ON 7 8 A Division of Rockford Corp. Tempe, AZ 85281 Crossover LP ­ CD EQ +0 2 +10 dB Full ­ Phase choose one only Audio GND Chassis Float Delay must 300W 2 ­ 8 -- For 70V, 100V, or Mono · Use CH B input · Load across RED terminals · Set load switches to one half load impedance Attention: Utiliser un fusible de rechange de même type. CAUTION: For continued protection from risk of fire, replace only with same type and rating of fuse. ® G X 2 3 0 0 Made in the U. S. A. 300 W Stereo, 2­ 8 600W Mono, 70V, 100V Freq CH A IN 500Hz ­ 800Hz ­ BIAMP STEREO Crossover LP ­ CD EQ Freq Full ­ +0 2 6 HP ­ 180°­ 0°­ Phase -- + Delay must choose one only 600W + + 300W 2 ­ 8 +10 dB 500Hz ­ 800Hz ­ 0"6"12"18"24"30"- -- CH B IN (Mono) 4­ 16 ON Mono, 70V, 100V Class 2 wiring 250V T7A 250W 115V~ 50-60Hz 5 15 6 10 11 13 14 16 1. Recessed Front Panel - Prevents switches and controls from accidentally being adjusted or broken. [. . . ] CH B input sensitivity controls 70V mono output level. Amplifier will clip at 70Vrms level. ­ 20 ­ 100V MONO MODE (GX2300/GX2600) 1. Connect signal from source to CH B input. Stereo/Biamp switch not active (Stereo/Mono switch overrides this switch when in mono/70V/100V mode). [. . . ]