The Rolls MP213 is a dual-channel microphone preamp that is designed to provide a small and simple solution for a variety of applications. The mixer boasts a servo-balanced instrumentation amplifier for studio-grade performance in a small, portable chassis. The unit sports 3.5mm and XLR inputs, XLR and 3.5mm outputs, and dual gain controls, each with a clip indicator. Phantom powering (+48V) is included for use with condenser microphones. Each XLR input offers up to 60 dB of gain, while the 3.5mm inputs offer up to 54 dB of gain. The 3.5mm output is specially designed for use as a camera microphone mixer or a monitoring output.

Two-Channel Design    3.5mm and XLR Inputs    3.5mm and XLR Outputs    Dual Gain Controls with Clip Indicators    48V Phantom Power for Condenser Mics    Output Designed for Mono or Stereo    Includes Power Supply

A simple and economic two-channel microphone preamp

3.5mm and XLR inputs with dual gain controls and clip indicator LEDs

3.5mm and XLR outputs

Provides +48V phantom power for condenser microphones

Output designed for mono or stereo applications

Servo-balanced amp equates to a 40 dB better common mode rejection ratio (CMRR) than the transistor inputs used by most companies on mic inputs; it also means much lower distortion

15 VDC power adapter included

Related Questions and Answers

Q: 1. Will this preamp boost an XLR signal a further distance than without using it? I have to cover a distance of ~300ft and am trying to assure no loss of signal.

A: The Rolls Mini-Mic Preamp is not really designed for boosting signal on a long cable run. For 300 feet, you should use high quality shielded audio cables to avoid signal loss and if you do need to increase the gain without adding noise, you might want to try the Cloud Microphones Cloudlifter CL-1 Mic Activator (B&H # CLCL1) which improves signal-to-noise ratio and improves the performance of passive microphone signals by driving stronger, cleaner signals over longer XLR cable runs.

Q: 2. For how long is the battery working?

A: They have not published that information.

Q: 3. Will this work to power and amplify a condenser mic fed into a 3-way line splitter, specifically a Whirlwind SP1X3LL?

A: The Rolls MP13 is able to power a condenser mic and the output can be connected to a splitter such as the Whirlwind SP1X3LL. The MP13 however only offers 36v of phantom power and would not be recommended for mics who require a full 48v. Many mics are able to operate at a range of voltages from 9v - 52v and you should check your mics requirements before purchase.

Q: 4. How much power does this draw?

A: Rolls does not specify. It is very low ()14-24 VDC. Please refer to the schematic below:a href= http://static.bhphotovideo.com/lit_files/89467.pdf target= _blank http://static.bhphotovideo.com/lit_files/89467.pdf/a

Q: 5. Is the case metal or plastic? Any RFI suppression built in?

A: Works Great. Metal case. I used it with an ethernet adaptor and was able to send the audio signal through a schools cat5 wiring for their school PA System.

Q: 6. Is this adapter compatible with the Sony HXR-MC2500 camcorder?

A: Yes, the Saramonic SR-PAX1 can be used with any camera that has a 3.5mm mic input.

Q: 7. Since this doesn’t work for IPhone, would it still work directly plugged into your PC for recording two mics? Like on Audition?

A: The Saramonic SR-PAX1 Two-Channel Audio Mixer, Preamp, Microphone Adapter's 3.5mm output could technically be plugged into a computer's microphone jack, but this is not how it is designed to be used and you would achieve much better results by using an audio interface instead.

Q: 8. If I do not need phantom power, can I still use it without the battery?

A: The Saramonic SR-PAX1 Two-Channel Audio Mixer, Preamp, Microphone Adapter requires power from a 9V battery in all use cases for proper operation. Using the SR-PAX1 with the phantom power feature disengaged still requires power from the internal 9V battery source.

Q: 9. Does this work with a Bluetooth adapter line in signal?

A: Yes you can go from the line output of the Rolls DU30b into a bluetooth transmitter.

Q: 10. I have just realised that these are incopatible with my Klark Teknick CT1 Mic Booster as the CT1 requires 48V phantom power and the Rolls MP13 provides 24V. Can you recommend a quiet, affordable alternative?

A: ART Tube MP Preamplifier B&H # ARTUBEMP Single-Channel Tube-Based Hand-Selected 12AX7A Vacuum Tube Variable Input & Output Gain Control Ideal as a Tube DI Box XLR & 1/4" Connections Inexpensive, Professional Performance Exceptionally Low Noise A Staple in Many Studios