MicroDrive Three Channel Amplifier

Channels A and B 180W RMS / 8 ohms, 250 / 4 ohms Sub Channel 230W RMS / 8 ohms, 450W / 4 Ohms All channels driven PowerDrive AmbiDrive ZR350 ZR550 ZR850 ZX3200 ZA 800 ZA 600 ZA 400 ZA 5.1 SX1500 SX3000 ZR C series

Innovation A three channel amplifier (A + B + Sub) designed primarily for our very popular MicroMAX series of installation speakers, but also eminently suitable for any similar Sub/Satellite speaker system. A distillation of our experience gained through years of making compact, powerful amplifiers.Designed to be a straightforward, convenient way to supply all amplifier functions within the one unit, the MicroDrive can easily handle any professional medium power applications. Smart Technology Inside A and B input connectors (XLR and jack, for added convenience) on the rear panel feed into an onboard plug-in Sub crossover card. This can be customised for non-ARX systems, and normally sums the signal below 100Hz in both channels and presents it at a separate Sub output connector. For a satellite speaker/sub woofer system, the MicroDrive is all the amp you’ll ever need! What if you don't need a Sub? If you'd prefer to use the Sub channel for something else - monitors, for example - then simply plug into the Aux to Sub Channel connector on the rear, and all the power of the Sub channel is available to use as a full range output. We've done everything we can to make the MicroDrive the most useful, flexible amplifier ever. Stable temperature Dual variable speed cooling fans pump air through ARX’s proprietary ‘UltraFin™’ heatsink to stabilise the MicroDrive temperature. When the amp is idling, so are the fans. When the internal temperature rises, so does the fan speed to maintain an optimum temperature. <<<UltraFin heatsink detail

MicroDrive Weight

Some amplifiers are just designed heavy, because it takes more time and effort and money to design them light! At ARX, we’ve invested in extensive R & D to solve the weight problem The MicroDrive weighs just 13 kilos (28 lbs) - light enough for a single person to carry and install. Using a high efficiency low mass toroidal transformer, coupled with advanced computer modelling techniques have enabled us to put the strength where it’s needed, and to reduce unnecessary weight where possible.

Speaker Protection

We’ve also done intensive research into amplifier protection, in order to design something that really does work. Thus the MicroDrive has relay switched protection circuits that instantly disconnect the speakers if a potentially damaging signal is detected. You’ll appreciate the fact that it’s a re-settable circuit, too, not a simple ‘one time only’ crowbar system that has to be stripped down to be replaced.

Built to Last

We believe that when you compare all these standard features to any other amplifier, you’ll see why the ARX MicroDrive should be your next amplifier. As a company, ARX is dedicated to producing pro audio products that consistently deliver the power and the quality that audio professionals expect. The MicroDrive is proof of our commitment - an amplifier that works as hard as you do at keeping your clients coming back for more.

MicroDrive Specifications

Channels A and B 180W RMS / 8 ohms, 250 / 4 ohms, Sub Channel 230W RMS / 8 ohms, 450W / 4 Ohms, all channels driven

	Rear Panel Details

Input Connectors	Balanced 1 x Female XLR per channel. Wired Pin 3 - Cold, Pin 2 + Hot, Pin 1 Electronic Ground, 1 x TRS balanced jack connector. Tip Hot, Ring Cold, Sleeve Ground
Output Connectors	Neutrik Speakons
Input Impedance	40 Kohms Balanced
Input Sensitivity	0.775 Vrms (0 dB)
Input CMRR @ 1KHz	>70dB
Channel Separation:@ 1KHz	-88dB
Frequency response: @ rated output:	20 to 20 KHz; Crossover frequency to Sub 100 Hz. Customised plug in card can be supplied
Metering:	LED status indicators for Signal Present and Protection
Protection Features	• Relay switched DC sensing • 'SilentStart/SilentStop' Input/Output muting at turn on/off • 'SoftStart' slow power ramp up
Cooling	Ultra Fin heatsink and variable speed DC cooling fans: 2 fans, air in front, rear exit
AC Power	Supplied 'zone-specific' 100/120/220/240V AC. Removable power lead on 3 pin IEC connector
Weight	13 Kg (28 lbs)
Size: Depth:	Standard 2 rack units high and 19" (482mm) wide 16" (405mm) Add 1" (25mm) to depth behind front panel to allow for rear rack mount ears and connectors. Add 1" (25mm) to depth before front panel to allow for handles and controls.
Slew Rate	35VuS
Damping Factor	200:1
Distortion	Channels A and B @ 1 KHz 8 ohms: 0.027% @ 1 KHz 4 ohms: 0.04% Sub Channel @ 1 KHz 8 ohms: 0.04% @ 1 KHz 4 ohms: 0.06%
Construction	All steel chassis and front panel, with Lexan front print. Front panel power switch and level controls. Rear rack mount ears for four point racking in high stress mobile installations

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