DMP3 Operation

A preamp is a necessary component of any signal chain, when a microphone, guitar pickup or other instrument needs an increase in gain to “line level.” The DMP3 will perform that role in your signal chain. The drawing below shows the DMP3 in use with a computer sound card, which in this case is the Delta 66 from M-Audio.

It is conceivable that once the DMP3 is attached to your system and powered up, you will be plugging and unplugging different microphones and instruments. Follow this simple procedure, making sure that the gain controls on the DMP3 are at their lowest levels when attaching or changing mics or instruments.

1.Plug in the 9v "wall wart" power supply into the wall receptacle, and the other end into your DMP3 9v power jack.

2.Make the necessary connections from the outputs of the DMP3 to the inputs of your computer sound card, mixer (use the line level inputs), or sound system’s power amp. NOTE: If your target device accepts a balanced signal either on a 1/4” TRS or XLR jack, use a TRS plug (tip-ring-sleeve, typically a stereo plug) on the outputs of the DMP3. If your target device accepts only an unbalanced line in, then use a ‘TS’ plug (tip-sleeve, i.e. a standard guitar cable). Check the documentation of your sound card or other receiving device if you are unsure. When possible, always use the balanced outputs as this will provide a quieter and hotter signal.

3.With all volume controls at their lowest settings, turn on your DMP3, then your sound system.

4	DMP3 User Guide

DMP3 specifications

The M-Audio DMP3 is a compact and versatile dual microphone preamp designed to elevate audio recording quality, making it a popular choice among musicians, podcasters, and audio engineers. Known for its affordability and robust performance, the DMP3 offers features that cater to both entry-level users and professional audiophiles.

At the core of the DMP3 are its two high-quality preamps, which utilize discrete transistor technology to deliver an impressive dynamic range and low distortion. This results in clear, high-fidelity recordings that preserve the nuances of any sound source. The preamps boast a gain range of up to 60 dB, providing ample amplification for various microphones, including dynamic, condenser, and ribbon types. The unit supports phantom power, making it compatible with condenser microphones that require additional voltage for operation.

One of the standout characteristics of the M-Audio DMP3 is its exceptional headroom and low noise floor, which allows for capturing clean audio without interference or hiss. The preamps also include a useful -20 dB pad switch, which can be engaged to avoid clipping when recording loud sound sources, such as drums or amplified instruments. This feature ensures versatility in various recording scenarios, from studio setups to live performances.

The DMP3 features balanced XLR output, which minimizes signal degradation and noise interference over long cable runs. This output is particularly useful when connecting to other audio interfaces, mixers, or recording devices. Moreover, the unit is housed in a rugged metal chassis, ensuring durability and portability for those who might be on the go.

The design of the M-Audio DMP3 is user-friendly, with clearly labeled knobs for gain adjustment and easy-to-read indicators for signal presence and clipping. This intuitive layout means users can quickly set up their equipment without getting overwhelmed by complex controls.

In summary, the M-Audio DMP3 combines high-performance microphone preamping with essential features, making it an excellent choice for musicians and audio professionals looking to enhance their recording quality. Its robust design, versatile compatibility, and high-quality output make it a reliable tool for capturing sound with clarity and precision. Whether in a studio or on the road, the DMP3 stands as an essential component in any audio setup.