1source unit using RCA type audio cables, keeping them away from power wiring wherever possible. On the 4 channel amplifier
(HA 700.4) “Front” and “Rear” input jacks are present.
2Input Gain Adjustment - This control matches the preamp stage of the HEX amplifier to your source unit. This is NOT a volume control. The range is between 150mV and 5V.
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5Crossover Adjustment - Use this adjustment to select the crossover point. Remember that your choice will be directed to High Pass or Low Pass depending upon the position of the adjacent switch.
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7and tweeters. 0 to 180 degrees of available adjustment capability. This is EXTREMLY useful to get the best and MOST bass out of your system.Phase Adjustment (HA 750.1) - This control allows you to adjust the "phase" so as to align the subwoofer in "time" to the mids
8 | Bass Boost - This control adds 0 to +12dB (HA 750.1 only) of boost at 45Hz. Be cautious when adding boost to some | subwoofer |
systems as they may not be able to handle the additional low frequency boost. In the OFF position, no bass boost is added. |
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9power supply and output stage of the slave amplifier(s) to the Master amplifier. This eliminates noise and the need to adjust the slave amplifier(s), while increasing efficiency.Master/Slave Port - This port is used in conjunction with the Master/Slave switch. This cable is nessesary to synchronize the
10 | Master/Slave Switch - This switch is used when connecting multiple amplifiers. One amplifier should be assigned the MASTER and |
the other(s) should be set to Slave. This will cause all of the amplifers set to Slave to function identical to the MASTER amplifier. | |
| One remote level control knob pluged into the amplifier with the MASTER switch selected will now control both amplifiers. |
11 | Remote Level Adjustment (HA 750.1 Only) - This port is for the remote level control (included). The control is intended to allow |
the user to control the level of gain up to the maximum adjustment level set on the amplifier. The control does not add additional | |
| boost, it only attenuates the setting that is fixed at the amplifier’s control panel. |
12 | Status LED’s - These lights indicate when the amplifier is powered up normally and when there is a protection fault. See the |
“Troubleshooting” section for details on what these useful indicators can tell you if there’s a problem. | |
13 | Power Input Connections - These connections are for input power, chassis ground, and remote |
gauge wiring for power and ground connections. The terminals will handle up to 4 gauge . Be sure any wiring that passes through | |
| metal has a grommet! |
14 | Power Fuses - Standard automotive type ATC/ATO fuses are used on HEX Series Amplifiers. Always replace with the correct |
fuse size. Never insert fuses of higher values. Doing so will void the warranty of your HEX amplifier. Also include a main fuse at | |
| the connection to the vehicle battery within 18 inches (45.7 mm) of the positive battery post. It is also important to upgrade the |
| connection between the negative battery post and the chassis of the vehicle. This greatly reduces possibilities of weak electrical |
| “links” in the circuit. |
15 | Speaker Output Terminals - Connect your speakers to these terminals. Stereo connections are made as labeled. Bridged |
connections use the LEFT + and RIGHT - as the two connections. The 2 and 4 channel amplifiers will perform into 2 Ohm stereo |
loads or 4 Ohm bridged loads. DO NOT run 2 Ohm bridged loads on these amplifiers! The HA 750.1 is the only amplifier in the series capable of driving a load as low as 1 Ohm.
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