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This light indicate’s when the amplifier is powered up normally and when there is a protection fault. The Protect
LED is illuminated when there is a problem with your amplifier. Please contact your authorize Diamond Audio dealer or call Diamaond
Audio’s technical support.
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This switch allows you to select the crossover Type. Use High Pass (HP) for midrange or high
frequency speakers. Use Low Pass (LP) for subwoofers. In the FLAT position, crossover adjustment knob has no affect and all
speakers will receive the full frequency range.
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This control matches the preamp stage of the Diamond Audio amplifier to your source
unit. This is NOT a volume control. The range is between approx. 200mV to 10V. It can ALSO handle speaker inputs of less than 25 watts
RMS (typical OEM headunits are LESS than 25 W RMS...but NOT all)
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The MICRO series of amplifiers can be switched on and off using one of three methods, determined by the
position of the amplifier’s: Turn-On Mode” switch. Please read the “Set-Up” portion of this guide and determine which is best suited for
your specific system. NOTE: DC and VOX turn-on settings ONLY work with speaker level input.
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Use this adjustment to ADJUST the crossover type. Remember that you must select the High Pass position (HP) or
the Low Pass (LP) or FULL range position of the crossover adjustment switch first. The range of adjustment is limited between
40-400 Hz (MICRO81U/MICRO84U) and 70 Hz front and rear FIXED on MICRO85U. Or FULL which passes ALL frequencies.
5
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This control adds 0 to +12dB 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 0dB position, no bass boost is added.
6
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The 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 to reduce risk of noise.
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(MICRO84U ONLY) Use this switch when you are using a stereo input ONLY, and would like all 4 output
channels on the MICRO84U to have signal/power output. Or when bridging stereo the MICRO84U to make a BIG 2 channel high pass or a
stereo subwoofer amplifier (4 Ohms only, stereo OR bridged).
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Connect your speakers to these terminals. Stereo connections are connected 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 MICRO82U/MICRO84U amplifiers! The MICRO81U mono block 1 Ohm mono,
MICRO85U sub channel 2 Ohms minimum.
10
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MICRO81U/MICRO82U amplifer have this port and 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.
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9
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(MICRO85U ONLY) Use this switch when you are bridging stereo the front 4 channels to be a big 3 channel
amplifier. Use the Front positive (+) and the Rear negative (-) for the bridged output (4/2 ohms ONLY!).
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This control is ONLY on the MICRO81U and allows you to remove the unwanted sub-sonic frequencies below
the tuning frequency of a ported enclosure. This helps to protect the woofer from over excursion.
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These connections are for input power, chassis ground, and remote turn-on. Use a minimum of 8 gauge
wiring for power and ground connections. 4 Gauge is recommended for the mono block. The terminals will handle up to 8 gauge wiring
with no problem whatsoever (4 gauge on the mono block). Be sure any wiring that passes through metal has a grommet!
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FEATURES
