One Control Purple Plexifier 4K

A timeless sound that will be loved forever.
It's vintage, classic, and standard. A legendary tone that truly forms the basis of the rock genre.
You don't have to think about difficult things, you don't have to worry about maintenance or preparation, you can carry it around anytime and anywhere and easily make that sound.

The PURPLE PLEXIFIER 4K is a four-knob version of the previous Purple Plexifier that offers even more control. You can freely control the tone with the MID knob. Achieved a thick, compressed tone while maintaining high response. The overall tone has been sublimated to a more modern tone, and the operation of the MID knob in particular has been adjusted, making it possible to always control the optimal balance.

With One Control PURPLE PLEXIFIER 4K, you can create that tone simply and easily.
Plexi is a transparent board made from acrylic. Why do these words pierce the sensibilities of rock guitarists?
This amplifier, commonly known as a "plexi amplifier", refers to a vintage British-made amplifier produced around 1969 with a Plexiglas (acrylic board) control panel.

In 1962, when there were no PA systems like today, the guitar amp that was created in search of a louder sound would later go on to make rock history.
Top guitarists around the world have demonstrated their power on stage, and even today, plexi amplifiers continue to have an overwhelming presence, both as a companion for many guitarists and as an entity that many guitarists aspire to.

Even though it is simply called a plexi amplifier, there are many variations in tone due to differences in output, combo, stack, and model. The sound that comes to mind when we say "plexi sound" is none other than the tones played by legendary masters.

That's the tone that PURPLE PLEXIFIER 4K aimed for. That gorgeous plexi sound with a “hot rod” customization. Furthermore, the "brown" sound is admired by guitarists all over the world and whose sound is still being tested. With PURPLE PLEXIFIER 4K, you can get what you would call "that sound."

There is one thing that is most important when reproducing such plexi sound. That's amp distortion. There's no point in simply making a modified plexi highly distorted and producing the sound you get when you play the guitar as hard as you can.
Even at full gain settings, if you play hard, the sound will be distorted, and if you play weakly, it will be clear. The strength of the distortion can be freely controlled by the guitarist, and every detail is conveyed to the fullest. However, it should not be too sensitive, and should allow players to enjoy the sound with ease. In other words, you want the same response and balance of clean and distortion as a real great guitar amp.

Balance and response like the amp itself. That's what BJF, who designed the PURPLE PLEXIFIER 4K, does best.

The PURPLE PLEXIFIER 4K delivers beautiful tones in the sweet spot common to many plexi amps, from clean to full gain to custom, high-gain plexi territory. You can freely control the tone with a small housing, 3 simple knobs, and 1 trim pot.

PURPLE PLEXIFIER 4K is not only characterized by the response, balance, and sound of a real amp. The wide range of tones that can be obtained by combining the TREBLE and MID knobs is also unique to BJF.
Many amplifiers, including plexiamps, are equipped with a 3-band equalizer, but the PURPLE PLEXIFIER 4K does not.
PURPLE PLEXIFIER 4K creates sound based on the low range of the guitar itself. By not controlling this, the overall distortion base is used as a reference point, and the timbre can be easily adjusted from there.
When you start creating sounds with the PURPLE PLEXIFIER 4K, first adjust the treble and mid-periphery sounds with the MID knob. Turn it counterclockwise to cut the midrange and create a shredder tone. It maintains a solid and tight tone, so even if you cut the mids, the sound won't become hazy. Turning it clockwise will emphasize the midrange and create a warmer tone.
Once you have decided on the basic direction of the tone, the final step is to adjust the TREBLE. The TREBLE knob controls the tone balance around 2kHz. If you set the MID knob to push out the mids strongly, the TREBLE knob will only be used to fine-tune the tone. Cutting the mid will make the effect of the TREBLE knob stronger.

An amp-like pedal with a wide gain range from clean to distortion. However, there are surprisingly few pedals that can use the entire range from clean to full gain like a real amp.
PURPLE PLEXIFIER 4K has a design unique to BJF that always uses a stable low range as a reference, sets the midrange to high range to your preference, and then balances the high range, producing British clean, bluesy crunch, and relaxed overdrive. , HR/HM high gain, you can balance the tone to your liking with any gain setting.

The flexible balance and high response of the PURPLE PLEXIFIER 4K also makes it effective when used in combination with other pedals and various guitars. For example, pair a British vintage fuzz with a Stratocaster for a legendary psychedelic tone, or combine a powerful American fuzz with a Jazzmaster for a grunge-style tone. Traditional overdrive and Les Paul, classic distortion and Gretsch...you can easily approach the tones created by various guitarists.

A truly timeless rock tone. PURPLE PLEXIFIER 4K is your ticket to "that tone" that every guitarist wants at least once.

‚óèControl
/VOL: Adjust the volume.
・TREBLE: Adjusts the tone in the mid to high range.
・DIST: Adjust the strength of distortion.
・MID: Adjusts the way the midrange comes out.

‚óèCharacteristics
・Overdrive/distortion pedal that creates a vintage plexi amplifier
・High response for detailed expression
・4-knob version, evolving to a more modern and balanced sound
・Can be combined with other pedals, guitars, etc. Can be used
- High quality mini-sized case made of machined aluminum
- Built-in battery is also possible
- True bypass switching

- Specification
Input impedance: 500K
Output impedance: 50K
Drive voltage: 9V
Current consumption: 3mA
S/N ratio: -73dB
Size: 39Wx100Dx31H mm (excluding protrusions)
„ÄÄ„ÄÄ„ÄÄ47Wx100Dx48H mm (including protrusions)
Weight: Approximately 160 grams (200 grams when batteries are inserted) 
*Batteries are not included.


PURPLE PLEXIFIER 4K (PP4Kn) is a British AIAB (amp in a box) that creates a rock sound that will last forever. It's a sound that anyone of any generation can play and enjoy. If used in combination with other distortion devices, its usage will be greatly expanded.
I use PP4Kn ‚Äã‚Äãas a distortion box in combination with SROD4Kn and LYC4Kn.

───Bjorn Juhl