OWNER’S MANUAL POWER PHONES 4 INPUT PHONES 3 1 2 PHONES 2 3 PHONES 1 4 +12V DC
HM-4 4-Way Headphone Amplifier Important Safety Instructions Read these instructions. Keep these instructions. Heed all warnings. Follow all instructions. Do not use this apparatus near water. Clean only with a dry cloth. Do not block any ventilation openings. Install in accordance with the manufacturer’s instructions. 8. Do not install near any heat sources such as radiators, heat registers, stoves, or other apparatus (including amplifiers) that produce heat. 9.
Introduction Important Safety Instructions.........................................2 Contents............................................................................3 Features.............................................................................3 How To Use This Manual..................................................3 Introduction......................................................................3 Getting Started.................................................................
HM-4 4-Way Headphone Amplifier Hookup Diagram INPUT 1 2 3 4 +12V DC 4–WAY HEADPHONE AMPLIFIER PC / MAC POWER PHONES 1 PHONES 2 PHONES 3 PHONES 4 The HM-4 4-Way Headphone Amplifier is an easy, convenient way to combine multiple listeners to the same signal. The hookup couldn’t be more straightforward. Start by turning the down the main output level on the computer and all four phones knobs of the HM-4.
HM-4 4-Way Headphone Amplifier: Front and Rear Panel Features Owner’s Manual 1. Power Connector and LED This connection is where to connect the supplied AC adapter to provide power to the HM-4. Connect the AC adapter to the HM-4 first, then plug the other end into a suitable and properly rated AC outlet. The HM-4 will turn on automatically when connected and the power LED will illuminate. HM-4s feature varying power connectors based on country.
HM-4 4-Way Headphone Amplifier Appendix A: Service Information If you think your HM-4 4-Way Headphone Amplifier has a problem, please check out the following troubleshooting tips and do your best to confirm the problem. Visit the Support section of our website (www.mackie.com/support) where you will find lots of useful information such as FAQs and other documentation. You may find the answer to the problem without having to part with your HM-4 4-Way Headphone Amplifier.
HM-4 4-Way Headphone Amplifier Specifications Audio Performance Maximum Level (1/4" input) Physical Properties +22 dB Input / Output Input Type Input Impedance Output Type Output Impedance Level Control Female 1/4" phono, unbalanced, stereo 10 k each channel, unbalanced 4x Female 1/4" phono, unbalanced, stereo 47 each channel, unbalanced 4x Rotating Phones Knobs Height: Width: Depth: Weight: 2.0 in / 51 mm 4.3 in / 109 mm 2.3 in / 58 mm 0.5 lb / 0.
HM-4 4-Way Headphone Amplifier HM-4 4-Way Headphone Amplifier Block Diagram LINE AMP LA FIXED RESISTANCE INPUT CAP OUTPUT LEVEL LINE AMP PHONE JACK CAP LA PHONE JACK HEADPHONE FIXED RESISTANCE LINE AMP LA FIXED RESISTANCE OUTPUT LEVEL LINE AMP LA PHONE JACK HEADPHONE FIXED RESISTANCE LINE AMP LA FIXED RESISTANCE OUTPUT LEVEL LINE AMP LA PHONE JACK HEADPHONE FIXED RESISTANCE LINE AMP LA FIXED RESISTANCE OUTPUT LEVEL LINE AMP LA 8 HM-4 4-Way Headphone Amplifier PHONE JACK F
Please keep your sales receipt in a safe place. This Limited Product Warranty (“Product Warranty”) is provided by LOUD Audio, LLC (“LOUD”) and is applicable to products purchased in the United States or Canada through a LOUD-authorized reseller or dealer. The Product Warranty will not extend to anyone other than the original purchaser of the product (hereinafter, “Customer,” “you” or “your”). Owner’s Manual Limited Warranty For products purchased outside the U.S. or Canada, please visit www.mackie.
16220 Wood-Red Road NE Woodinville, WA 98072 • USA Phone: 425.487.4333 Toll-free: 800.898.3211 Fax: 425.487.4337 www.mackie.
