STEREO TUBE MIC PRE MP-2A Owner’s Manual ™
WARNING! Before you start your new MP-2A Series True Tube Microphone preamp please read the following: ANY real tube product is sensitive to a high SPL environment. This may cause microphonics in a recording situation. Make sure you are able to shock mount and or place the unit in isolation if need be. Direct light will also affect tubes, as well. PLEASE, be sure to have at least one rack space between any tube products from the product above and below the unit.
Introduction Welcome to the Analog Sound of the MP -2A. This is an all tube product, and there are some basics you should know before using this product for the first time. Tubes are a component that have specialized and unique features. If you are a “pre” or baby boomer, born before 1957, you may recall using tubes in various products, such as radios, amplifiers, and televisions. So, this is just to refresh your memory.
Features • Vacuum-tube design • Two (2) Level Volume Controls • Two (2) Polarity Switches • Two (2) Tone Switches • Two (2) Phantom Switch • Two (2) Backlit True VU Meters • Red Jewel Lamp On/Off • Two (2) Neutrik Combo XLR 1/4” Input Connectors • Two (2) XLR Output Connectors • Zero Feedback Loop • Two (2) U-Rack Space • Two (2) CineMag Input Transformers • Two (2) Custom Wound Output Transformers • Two (2) 6NI-P Tubes • Two (2) EF86 Tubes • Clean and airy high end • Warmth
Specifications TECHNICAL DATA Input Impedance. . . . . . . . . . . . . . 1.4k Ohm Gain Range . . . . . . . . . . . . . . . . 60dB Noise (EIN) . . . . . . . . . . . . . . . . -128 Weighted Mic Phantom. . . . . . . . . . . . . . . . Switchable 48 Volt Power Source Mic Input Phase . . . . . . . . . . . . . . Switchable 0-180 Instrument Jack Input . . . . . . . . . . . 1/4 phono Input Impedance. . . . . . . . . . . . . . Min > 100k Ohm Balanced XLR Output: Output Impedance . . . . . . . . . . . . .
Functions Front 1 Level Control Knobs - These knobs are just that. They will control the level/pad of the incoming signals. 2 VU Meters - Meters provide general indication of level. They are set to -4dB. 3 Direct In 4 Polarity Switch (0 to 180) 5 Pad Switch (+20dB) 6 Phantom On/Off - The Phantom Switch gives you the option to use various types of Microphones. If you are using a Condenser Microphone please make sure you have the Phantom Switch in the on position.
Functions (continued) Back 12 AC Power Connector - For electrical outlet (Caution: please check to see what Voltage your MP-2A is set to). If the Voltage Box is not marked according to your country’s code please notify A Designs before powering up. 13 Fuse Amperage - These are placed on the MP-2A to indicate which voltage your unit is set up for. USA Voltage should be set to 120v. For export to countries with 220v, the correct box should be marked at the back of the unit.
Applications ALWAYS USE GOOD COMMON SENSE WHEN OPERATING ANY ELECTRONIC EQUIPMENT. IF YOU HAVE QUESTIONS PLEASE CONTACT YOUR DEALER OR THE MANUFACTURER BEFORE DOING ANYTHING!!!!! A good, quality microphone preamp will add a full, warm sound to any type of recording or live performance. Generally, we begin by setting our input signal to unity, then concentrate on other devices such as compressors or effects for modifying the sound. But, this does not always have to be the case.
A-DESIGNS AUDIO INC. PRO-AUDIO P.O. Box 4255 West Hills, CA 91304 USA (818) 716-4153 www.adesignsaudio.
