The Powerjack from Fishman is a miniature preamp in an elongated 1/4” endpin jack designed to provide active performance to a passive piezo pickup in an acoustic instrument. It replaces the existing endpin jack.

The Powerjack features a low-noise FET Class A input stage, and a bipolar Class AB output stage, yielding a signal-to-noise ratio of 94 dB.

It is powered by a 9V battery (available separately). Battery life is up to 12,000 hours.

Miniature Preamp in a Long 1/4" Jack    Replaces Existing Endpin Jack    Designed for use in Acoustic Instruments    Powered by 9V Battery    Battery Life up to 12,000 Hours

• Miniature preamp in an elongated 1/4" jack
• Replaces existing endpin jack
• Designed for use in acoustic instruments
• Powered by 9V battery
• Battery life up to 12,000 hours

Related Questions and Answers

Q: 1. 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: 2. Can this be used in place of a mic activator, such as a cloud lifter ?

A: Yes, you can use the TubeOpto instead of a Cloudlifer. The TubeOpto can be used with dynamic and condenser microphones while the Cloudlifter is specifically for use with dynamic mics. The Cloudlifer has a passive design that uses phantom power from the mic input you connecting to and can add up to 25 dB of clean gain. The TubeOpto does much more than just add clean gain since it is fully featured tube-based mic preamp. Its eight channels each have their own input and output gain controls which can add up to 70 dB of clean gain as well as additional features to shape the sound.

Q: 3. Will this boost an XLR signal a further distance? I have a cable run of ~250ft and am trying to assure that I don't lose a signal.

A: The Rolls Mini-Mic Preamp is not really designed for boosting signal on a long cable run. For ~250 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: 4. does this unit come with a power supply? My main intent for it is to put between my TT and Pioneer spc-1 preamp, because of the long distance between the two. I'll also use it to transfer some vinyl to computer, but for that purpose I believe the USB connection will power it.

A: The power supply is included with the USB Phono Plus.

Q: 5. 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: 6. is this power supply dual voltage and hrtz?

A: Based on what we can tell, this power supply would be dual voltage and dual hertz.

Q: 7. I'm using Cubase as DAW and Fireface UC . Can I connect Art TubeOpto 8 to Fireface and control/record all to Cubase?

A: Yes you can. I recommend attaching the Art via the ADAT out optical port to the ADAT in port on the FireFace. That will send all 8 channels digitally to the FireFace for recording into Cubase.

Q: 8. Is this hardware version 1.1? If so it will have dip switches on back of unit. This allows home theater bypass.

A: The SPL Elector Preamp has 4 dip switches on the back. This and further details can be found on the SPL product page for the Elector Preamp, linked here: https://spl.audio/en/spl-produkt/elector/

Q: 9. Does this come with a power adapter? If so, can it work for 110v to 220v?

A: Yes, the Rolls MP13 Mini-Mic Preamp includes the Rolls PS27s 15 Vdc 500ma 100-240VAC power adapter.

Q: 10. Which Rolls preamps are battery powered?

A: NO LO SE