PJB（PHIL JONES BASS） / Double Four Plus Black

The "Double Four" combo amp is now even more powerful and has a high power and sound quality that cannot be imagined from its size. It is also compatible with mobile battery operation and is designed to be used not only for practice and mini-live performances but also for today's live streaming and online lessons.

Output: 90W (RMS)
Speakers: PJB 4" x 2 + RALFER Passive Radiator
Frequency Response: 40Hz-17kHz
Inputs: 3 (Input, AUX, Bluetooth)
Outputs: LINEOUT (1/4 "TRS Stereo), Headphone (3.5mm TRS mini Stereo)
Bluetooth: 5.1
Controls: Input Level, Level Selector, Bass, Mid, Treble, AUX Volume/mute, BT Volume/mute, Master Volume, Lineout Volume
Body size: 329(W) x 203(H) x 215(D) mm
Weight: 5.1 Kg
Color: Black

Battery Requirements

1. USB PD compatible mobile battery (PD is a USB standard and stands for Power Delivery)
2. USB output voltage of DC20V or higher
3. USB output amperage of 3A or more

Note: Batteries with less than 20V output will not work.
Amplifier output, sound quality, and usable time will vary depending on battery specifications. 3A type will have lower volume sound quality compared to AC power.
Also, we do not guarantee the availability of all batteries. The protection circuit may stop working with some batteries when the amplifier has excessive input/output.