The Double Four has evolved a significant improvement in the popularity of both professional and professional amateurs with high quality sound quality that exceeds the size.
90W with a large power, and the sound quality is also significantly smoother and more powerful. Inst, Bluetooth, AUX input and mix and ring simultaneously, stereo output and support power bank operation.
Introducing a new generation PJB amplifier that can be used for all types of instruments, including practice, mini lives, and current live broadcasting and online lessons.
Large output 90W for bass CUB and high sound quality.
The newly designed pre-& power amplifier delivers high output and glossy sound.
At about 11.8 inches (30 cm) wide, the output is 90 W that will look like the famous bass CUB model revolutionized.
You can practice your home or do small live sessions.
2 x 4" speakers
The secret to high quality sound quality that PJB cannot be achieved is the exclusive 4-inch speaker.
Equipped with powerful magnets and coils, the sound is full of speed with a wide range.
Follow the slight movement of the players fingertips.
RALFR Passive Radiator
The secret to creating deep bass beyond the size is the passive radiator installed on the back.
PJ called RALFR, this passive radiator moves with the main speaker, and increases bass as it moves.
3 input simultaneously Inst + AUX + Bluetooth
The main input has input sensitivity, mute, and 3-band EQ.
Also equipped with the X4 popular Bluetooth and AUX input.
The 3 inputs are level and mute, and can be used as a simple mixer.
Stereo Line Out
Apart from the output from the main speaker and headphone, it can be used to record and distribute stereo output from Mei LINEOUT.
You can use it for a variety of purposes such as one-operation distribution and online lessons using each level and mute.
Power bank compatible.
The power supply is normal AC 100V, but it can also be powered by a power bank for home practice.
As it is an emergency use, the circuit protection may work with excessive inputs.
Compatible Battery Conditions:
1. USB PD compatible power bank (PD is USB standard, short for Power Delivery)
2. USB output voltage above DC20V
3. Amperage of USB output is 3A or more (with headphone) 5A or more (with speaker output)
Note: It will not work with batteries less than 20V output.
It is not guaranteed to work with all batteries.
The protective circuit may stop working when the amplifier is overpowered, so it is not recommended to drive a battery for live performances etc.
Model Double Four Plus
Power: 90 W (RMS)
Speaker 2 x PJB 4" + RALFER Passive Radiator
Frequency Response: 40Hz-17kHz
Input, Aux, Bluetooth.
Output LINEOUT (1/4" TRS Stereo), Headphone(3.5mm TRS mini Stereo)
Bluetooth 5.1
Control Input Level, Level Selector, Bass, Mid, Treble, AUX Volume/mute, BT Volume/mute, Master Volume, Lineout Volume
Product Size: 12.0 inches (329 mm) (W) x 8.0 inches (203 mm) (H) x 8.5 inches (21
Weight: 11.3 lbs (5.1 kg).