Setting the Gain

The DMP3 provides up to 66dB of gain on the XLR and 1/4” high impedance inputs. Microphones and guitar pickups typically emit a low signal level, requiring a "pre-amp" such as the DMP3. Other instruments, such as keyboard sound modules, may also benefit from a little bit of punch from the DMP3.

Plug in your mic or instrument with the gain controls turned down, then turn the gain up incrementally while testing the mic or playing the instrument. When the VU meters show activity at a fairly consistent level, you’ve reached a good signal level for the DMP3 (see section, “VU meters”). Some users may wish to experiment a little further to find what audibly might be referred to as a "sweet spot." Note that when the "clip" LED lights, it is indicating that the signal is at least 4dB below clipping. Let your ears be the judge, but when the clip LED lights and stays lit, you are approaching or have reached distortion in your DMP3 signal.

NOTE: You must also consider the level that is being sent from the DMP3 to your recording device, sound card input, mixer or sound system. Check the input meters at the receiving device and make sure that they are neither too low nor clipping (too ‘hot’). You may be able to adjust the input level or operating line level of this device, otherwise an adjustment in gain on the DMP3 may be necessary.

Sound cards and other recording devices may or may not have an input level adjustment. If your recording device (tape recorder, computer & sound card, etc.) does not provide input level adjustments, then the signal level that you use to record will rely totally on your source (voice/mic, guitar/instrument, etc.), and the level you set on the DMP3. If your recording device does provide input level adjustments, then we suggest using a unity gain setting as a starting point. This is usually around the 2:00 position, though your user guide may provide more information.

VU Meters

The VU meters on the DMP3 are there to provide a visual reference to the signal at the output of the DMP3. They are, however, calibrated to correspond more closely to the level you will see on a recording device that has digital peak meters to show input level.

VU meters show an average of the signal voltages, while peak meters show the true peaks in that signal. Peak meters are, in that sense, more sensitive than VU meters, and are more affected by timbre and pitch. It is possible that a peak meter could be approching the 0dB level (the maximum possible before clipping), while the VU meter shows very little movement.

The VU meters on the DMP3 are adjusted so that a more accurate visual representation is created in relation to the peak meters in your computer or digital recording device. As mentioned, this relationship will vary between instruments of different timbre and pitch.

Because of that, you may want to compare the DMP3 VU levels to the inputs levels on your recording device for each performance, and decide how “hot” you can go on the VU meters before clipping occurs on your recording device.

DMP3 User Guide

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M-Audio DMP3 manual Setting the Gain, VU Meters
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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.
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