The easy-to-use Rolls DU30b Audio Ducker & Microphone Preampis designed for small clubs, restaurants, or stores where voice paging is required to be heard over background music.

The unit inputs the music source via a pair of RCA inputs, while the microphone is connected via an XLR input that can supply +12V phantom power. If another source other than voice needs to control the ducking, that can be brought into the unit on additional RCA jacks.

The microphone input has a pad in case the microphone being used has a high output. The sensitivity control of the DU30b sets the threshold at which the microphone will duck the music, and a mic level knob controls the volume of the microphone input.

For Small Clubs/Restaurants/Stores    For Voice Paging over Backgrounds    Easy to Use    2 RCA Inputs for Music    XLR Mic Input    Mic Level Knob for Volume Control    Supplies +12V Phantom Power    Microphone Pad Switch

Audio ducker for small clubs, restaurants, or stores

Very easy to use

2 RCA inputs for music, 1 XLR mic input with level knob for volume control and +12V phantom power

Microphone pad switch to temper high-output mic levels

Related Questions and Answers

Q: 1. Hello,According to Sure all of their dynamic microphones are unaffected and will not cause damage or cause poor performance if phantom power is used. Also other sources state if a dynamic mic is newer and or balanced it can be used with phantom power. I have both dynamic (Sure) and condenser mics. Will a dynamic mic damage the Fethead Phantom or will it cause poor audio performance while used with dynamic mics? Thank you and have a great day,McCoy

A: As you know the Fethead Phantom passes phantom power through to the microphone after it uses a portion of it for its own operation. I oubt that a dynamic microphone will damage the Fethead Phantom. However, the impedance of the Fethead Phantom I believe is different than the standard Fethead as it was designed for low impedance condenser mics. The regular Fethead has an impedance of 22K ohm whereas the Phantom version is lower (I believe around 1K). So if you are using a high impedance dynamic mic with the Fethead Phantom the audio performance may be affected. However, a competitor of the Fethead, the Cloudlifter is around 3K, considerably lower than the regular Fethead. I purchased the Phantom version for use with condenser mic and have a different product for my dynamic mics. But I would not be concerned to try Fethead Phantom with my dynamic mics. One issue I had with the Phantom (a few others have reported it as well) is that with one of my condenser mics (none of the others) it was picking up signals from a local radio station. I spent a considerable amount of time trying to discover why this was happening as normally that was not an issue with that mic. I ended up adding a Sescom inline RF filter (SES-Inline-EMCM) at the end of the XLR cable before it goes into the mixer. This worked very well and eliminated all the RF signal. And in fact I found I could attach the Fethead Phantom to the Sescom adapter without any issues. Normally Triton recommends that the Fethead is attached directly to the mic connector. I hope the above helps.

Q: 2. Is this the correct Fethead for the Deity S-Mic 2S? Or should I be getting the regular Fethead? (The S-Mic 2S is a phantom powered mic, but even still this isn't clear).

A: This is the correct model.

Q: 3. I have a Sennheiser MKH 416 and I didn't know the Sennhieser wireless plug SKP-100 doesn't have phantom power. Would this help give my microphone phantom power for wireless use? Or am I stuck investing in a SKP-500 for $499 USD?

A: You could try using a more inexpensive wireless system that provides phantom power as well, like the Xvive U3C. https://www.bhphotovideo.com/c/product/1484388-REG/xvive_audio_u3c_set_u3c_wireless_2_4_ghz.html?sts=pi&pim=Y

Q: 4. Needing a amplified microphone to do voiceover on live dvd recording?

A: You don't need it, but a pre amp is a good idea!

Q: 5. Does this provide "plug in" power to the 3.5mm input jack?

A: Yes, the Rolls MP13 will supply plug-in power to the 3.5mm mic input.

Q: 6. can this be repurposed and used to pre amp a playback tape head? i know this is unconventional but i just need it to work. HELP!

A: The Rolls MP13 is a mic preamp so it is designed to receive a mic level signal but the output from the playback tape head is a line level signal. It could work, as long as you can control the output level from the tape head so it does not overload the input of the preamp, unless that is the desired effect that you wish to achieve.

Q: 7. 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: 8. The rode NTG-2 has can power itself with a AA battery. Will that battery power transfer also the this Fethead or must the Fethead power come from the recorder? I would like to plug NTG-2/Fethead combo directly into mirrorless camera.

A: No, the battery power for the NTG-2 will not also power the TRITON AUDIO FetHead Phantom In-Line Microphone Preamp.

Q: 9. What is the difference between Fethead Regular and Fethead filter?

A: On some microphones, a subject close up to the mic may have exaggerated bass frequencies. Although this can be desirable for some recordings, it may not always be what you want. The Fethead filter mic has a high pass (low cut) filter built in, which will cut frequencies below 220 Hz by 6 db/octave. The standard Fethead model (B&H # TRFETHEAD) will boost all frequencies evenly.

Q: 10. Can this be re-purposed to be used from an XLR out from the back of my amp (Peavy Vypyr Pro 100) to patch headphones in to monitor the signal being sent from the amp to the mixer board on the bands PA system?

A: If your amp is a XLR Mic level output yes. It will take Line level out also but it will take much less boost to power the headphones. If it is speaker level out you may blow out the preamp.