Diamond HEX HA 700.2 Installation Manual Download Page 5

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RCA Input and Pass-Thru Output 

- These RCA jacks allow for a normal Left and Right channel signal input. Simply connect to the 

source 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. The“Pass-Thru” output allows the signal to pass on to other amplifiers. 

The Pass-Thru output is unaffected by the onboard crossover.

Input 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.

ON / OFF Crossover Selection Switch

 - This switch allows you to turn on or off the crossover. In the OFF position, the crossover 

selection switch and adjustment knob have no effect. The HA 750.1 is only available as Low Pass.

Crossover Selection Switch

 - This switch allows you to select the crossover. Use High Pass for midrange or high frequency speakers. 

Use Low Pass for subwoofers. The HA 750.1 is only available as Low Pass.

Crossover 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.

Sub-Sonic Adjustment

 - This control allows you to remove the unwanted sub-sonic frequencies below the tunning frequency of a 

ported enclosure. This helps to protect the woofer from over excursion.

Phase Adjustment

 

 (HA 750.1) 

- This control allows you to adjust the "phase" so as to align the subwoofer in "time" to the mids 

and tweeters. 0 to 180 degrees of available adjustment capability.  This is EXTREMLY useful to get the best and MOST bass out 

of your system.

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.

Master/Slave Port

 - This port is used in conjunction with the Master/Slave switch. This cable is nessesary to synchronize the 

power 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 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. 

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.

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.

Power Input Connections 

- These connections are for input power, chassis ground, and remote turn-on. Use a minimum of 4 

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!

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.

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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Summary of Contents for HEX HA 700.2

Page 1: ...HA 700 2 HA 700 4 HA 750 1 AMPLIFIER INSTALLATION MANUAL ...

Page 2: ...d your serial number model number and date of purchase for your HEX amplifier as this will be necessary for any returns Please Practice Safe Sound Continuousexposuretosoundpressurelevelsover100dBmaycausepermanenthearingloss Highpoweredmobileaudiosystemsmayproduce sound pressure levels well over 130dB Use common sense and practice safe sound All Diamond Audio HEX Series Amplifiers Feature Pulse Wid...

Page 3: ... Distortion Noise 0 4 Output 1W 4 Ohms RCA Input Sensitivity 150mV to 5V Min to Max Voltage requirements 9V to 15 5V DC High Low Pass Crossover 24dB Oct Variable From 35 350Hz Crossover Configuration Switchable OFF HP LP HA 700 4 4 Channel Amplifier 700 Watts RMS Output Power All Channels Driven Into 4 Ohms 100w x 4 Into 2 Ohms 175w x 4 Bridged into 4 Ohms 350w x 2 Frequency Response 20Hz to 250Hz...

Page 4: ...4 Connections and Controls This section describes how all of the terminals and adjustments of HEX Series amplifiers function 4 gauge power and ground wire is recommended for all models ...

Page 5: ...Master amplifier This eliminates noise and the need to adjust the slave amplifier s while increasing efficiency 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 plu...

Page 6: ... from the battery prior to beginning the installation It will keep any unintended short circuits from damaging vehicle electronics during installation of the amplifier 3 For easier assembly run all wires prior to mounting your amplifier in place 4 Route all of the RCA cables close together and away from any high current wires or vehicle com puters This will greatly minimize the chances of unwanted...

Page 7: ...cal system has enough capacity to handle the increased load of your stereo system Original equipment electrical systems which are in good condition should be able to handle the extra load of any DAT ampli fier without problems although battery and alternator life can be reduced depending on your individual listening habits To maximize the performance of your amplifier we suggest the use of a reser...

Page 8: ... from the end of the wire Insert the bare wire into the REM terminal and tighten the set screw to secure the wire in place Connect the other end of the REM wire to a switched 12 volt positive source The switched voltage is usually taken from the source unit s remote amp on lead If the source unit does not have this output available the recommended solution is to wire a mechanical switch in line wi...

Page 9: ... HA 700 4 4 Channel Amplifier 4 Channel Mode 1 speaker per channel 3 Channel Mode 1 pair stereo plus one bridged channel 2 Channel Mode both pairs of channels bridged HA 700 2 2 Channel Amplifier PWR PRT FUSE R R L L REM GND 12V PWR PRT FUSE R R L L REM GND 12V 2 Channel Mode 1 speaker per channel Bridged Mode PWR PRT FUSE MONO REM GND 12V HA 750 1 Mono Amplifier If you are connecting more than on...

Page 10: ...ions for frayed wires and loose connections which could cause problems Install in line fuse near battery connection at this time Prepare to make some adjustments to fine tune your audio system for optimum performance Adjustment of Input Gain To adjust the gain setting turn the amplifier gains all the way down counterclockwise Turn the source unit volume up until distortion is audible and then turn...

Page 11: ...d leave the amplifier s bass boost alone 2 While playing the same musical selections used during the gain setting process slowly increase the level of the Bass EQ You should be able to notice a demonstrable change between 0 and 12dB If you do not notice much difference then it will not serve any benefit to increase the boost further 3 If the boost has audible benefits without adding appreciable di...

Page 12: ...al AuthorizedDATdealerforwarranty Non defectiveitemsreceivedwillbereturnedfreightcollect Freightdamageandreturnsarenotcoveredunderwarranty Includeproof of purchase Warranty expirationonitemsreturnedwithoutproof of purchasewillbedeterminedfromthemanufactur ing date code You can confirm that a dealer is authorized for service by the display of a current authorized dealer window decal Any questions c...

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