Korg Pandora PX4D Guitar Multi Effects Processor  

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The Toneworks Pandora PX4D Personal Multi-Effect Processor combines vintage amp models, a wide range of cabinet models, plus a combination of classic and unique effects for great guitar or bass sound ... Click To Read More About This Product

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The Toneworks Pandora PX4D Personal Multi-Effect Processor combines vintage amp models, a wide range of cabinet models, plus a combination of classic and unique effects for great guitar or bass sound whether practicing, recording, or even playing live. The processor's 158 effects deliver fantastic tones, including 25 amp types from high-end tube amps to rare vintage amps and everything in-between. Each of the 23 cabinet effects that reproduce the acoustic and structural resonances of a speaker cabinet were newly created especially for the PX4D. The creative possibilities are practically limitless. For example you can combine a guitar amp with a bass cabinet.

The PDX4 delivers a versatile range of tones with numerous realistic modeling effects in addition to standards such as compressor and wah. Pickup modeling transforms the sound of a single-coil pickup into that of a humbucking pickup (or vice versa), a guitar (bass) synth that lets you play synth sounds, an intelligent pitch shifter that automatically harmonizes with your playing, a talk effect that produces the impression that your guitar is speaking, a slow attack effect that creates violin-type swells, a feedback effect that allows feedback playing techniques that are normally possible only at high volumes, a rotary speaker that changes speed in response to your picking or fingering dynamics, a fretless bass effect that simulates the distinctive sound of a fretless bass, and many more are all at your fingertips, ready to spur your creativity.

The PX4D Multi-Effect has 200 programs, including 100 preset programs and 100 user programs.

Like other Pandoras, the PX4D offers an intuitive, knob-based interface and backlit LCD display. The TAP button can be used to set delay times or a rhythm pattern tempo.

A sophisticated phrase trainer can record up to 30 seconds from an external audio source for looped playback, which can then be slowed down without affecting the pitch. While in Phrase Trainer mode, users can record any of the 100 PCM-based, built-in rhythm and bass patterns and their instrument simultaneously, then practice soloing over the recorded phrase. The AUX IN jack lets users play along with external audio sources, and a key transpose function can shift the key of the external audio for versatile rehearsal. An auto chromatic tuner with a mute function is also included.

The Toneworks PX4D can be powered by 4 AAA batteries for up to 10 hours of continuous use, or by an optional AC adapter.

  • Built-in, high-quality REMS effects
  • 158 effect types from realistic amp sounds to sophisticated effects
  • 200 programs: 100 preset and 100 user programmable
  • Up to 7 effects simultaneously
  • Knob-based interface for quick and intuitive editing
  • Phrase Trainer function helps you learn by ear and master difficult passages
  • 100 rhythm and bass patterns cover a variety of styles with realistic PCM sound
  • AUX IN jack lets you play along with external CD, MD, or MP3 audio sources
  • Key Transpose lets you shift the key of an audio source input
  • A Bass Canceler function removes the sound of the bass from an external audio source
  • Auto chromatic tuner also provides a Mute function for silent tuning
  • Semitransparent LCD illuminates the characters in inverse video when backlit
  • 2-way power supply lets you use either batteries or a separately sold AC adapter
  • Effect Types:
  • CABINET: 1X8TWD, 2X10BLK, 4X10TWD, 1X12TWD, 1X12VOX, 2X12BLK, 2X12VOX, 4X12VOX, 4X12CLS, 4X12MDN, 4X12VIN, LA4X10, MDN4X10, MTL4X10, CLS8X10, UK4X12, STU1X15, JAZ1X15, AC2X15, US2X15, UK4X15, LA1X18, COMBI
  • DELAY: SLAP1-5, DELAY1-5, PPDLY1-5, ECHO1-5, MULTI1-5
  • Inputs:
    Guitar input (1/4" jack)
    AUX (mini stereo jack)

    Line/headphone dual-purpose output
    (stereo phone jack)

    Tuner section:
    Detection range: 27.5 Hz-2,093 Hz (A0-C7)
    Calibration: A = 438 Hz-445 Hz

    Rhythm section:

    Power supply:
    4 AAA alkaline batteries,
    Allows 10 hours of continuous use (backlight OFF),
    Allows 7 hours of continuous use (backlight ON), separately sold AC adapter (DC4.5V)

    Dimensions (W x D x H):
    2.99" x 4.41" x 1.06"
    76mm x 112mm x 27mm

    0.30 lbs./138g (not including batteries)
USA Warranty Policy

All Korg products purchased from a Korg USA authorized dealer are warranted to be free from defects in material and workmanship to the original consumer purchaser as listed below:

Labor: 1 Year
Parts: 1 Year

Exceptions: Tubes, AC Adapters, Foot Switches: 90 days

Warranty Requirements and Limitations:

-Proof of Warranty - The customer must provide proof of purchase in order to obtain warranty service. The dated sales slip or copy thereof is the only acceptable proof of purchase.

-The product must be purchased from a Korg USA authorized dealer and have a valid serial number.

Damage resulting from the following causes are excluded from the warranty set forth above:
-Misuse, including damage occurring during shipment, damage caused by battery leakage, accident, fire, unauthorized repairs, tampering, cosmetic damage or other types of damage which are the result of improper handling or abuse.
-The cleaning of controls or contacts due to exposure to dirty, dusty, or otherwise contaminated environment.
-Damage resulting from modification.
-Damage to units used for loan or rental.

Register online and extend your warranty!
Register your new Korg keyboard, keyboard rack module or digital piano online and receive a certificate that extends the product warranty for an extra year from the date of purchase.

  • Customer Reviews

Review Snapshot

by PowerReviews
KorgPandora PX4D Guitar Multi Effects Processor

(based on 50 reviews)

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Reviewed by 50 customers

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(4 of 4 customers found this review helpful)


miracle in a box

By Heavy element

from Chicago

Comments about Korg Pandora PX4D Guitar Multi Effects Processor:

I have been playing for over 30 years and have owned many amps , heads , pedals and processor . My main rig is rather large in order to get my sound . Recording wise this thing comes pretty close, but live nothing beats an old fashion tube amp for ball crushing earth quacking sounds . I got this because I like to play late at night when the wife is sleeping and this unit lets me do that using my bose computer speakers as an amp thru the computer.

(2 of 2 customers found this review helpful)


Great Front End Box

By jerryb437

from Shreveport, LA

Comments about Korg Pandora PX4D Guitar Multi Effects Processor:

I read alot of equipment reviews, but have written very few. Just thought I had to say a few words about this unit. I own 2 PX4D's and 2PX4's. I perform approx 275 shows a year with these boxes. I use a alot of backline amps usually Fender's and needed an effects unit I could use with virtually any amp and still get a consistent sound. I have spent hundred's of dollars on effect units still I settled on this one. I carry 3 units with me at all times, one primary and two backups. I am very pleased with the way these boxes get me up and running in no time and my sound stays consistent from show to show. I use only 2 presets, one clean and one with a little crunch. I then use 2 tube screamer pedals and an EB volume pedal. The tube screamers are placed in line to the PX4D and the volume pedal is placed between the PX4D and the amp input. I do some light tweaking on the amp eq, set the amp level and I'm ready to roll. I play mainly classic rock and country using PRS Guitars.If you are in the situation I'm in having to use various amp setups, then you want to give this a try. It works for me and really sounds good when I get to use my own fender twin setup. Thought this review might help the working musician having to deal with similar situations.


Good for spontaneous practice

By InTheDark

from Sacramento

Comments about Korg Pandora PX4D Guitar Multi Effects Processor:

Just some simple points:Only drop it on plastic because it's all plastic.Fairly easy to navigate and tweak.Sounds okay thru headphones and amp, kind muddy. If you want chug you get blub. Try using the "out of Phase" effect because it helps, but you have to then boost the lo mids and bass to compensate for the effect.Nice for timing and improv practice with the internal back up band.Clean sounds are fine.Things like synth and bass emulator, reverse swell are really kinda gimmiky and not to useful(as usual).Overall: Great for just getting reps at night or in the park. Overdriven and distorted sounds are Ok but you'll want your regular rig after a while. I wouldn't use it through a PA for a gig. These types of little boxes are just a few years away from being really, really useful.

(1 of 1 customers found this review helpful)


Great for Practice and Recording

By WarriorGuitar137

from Fort Collins

Comments about Korg Pandora PX4D Guitar Multi Effects Processor:

I would like to say that this is one of the best multi fx boxes i have ever used. Ive been playing guitar for a little over five years and in all my experience i have yet to see a multi fx unit for the price that is not better than this little guy. I use this box at my guitar school alot to practice my chops and write songs. Every effect will literally inspire you to new heights! I recommend this unit to any bands or individuals who want to add some good quality sound to their recordings or practice sessions. However this unit is highly impracticable for live sessions for obvious reasons. takes too long to find your effects on stage. other than that korg has made a really really good unit for the budget minded musician!


Bass Preamp

By Fireline Bass

from Owasso, OK

Comments about Korg Pandora PX4D Guitar Multi Effects Processor:

I run this as a preamp for my bass rig which is a peavey nitrobass which powers two cabs a 4x10 hartke and a 1x15 peavey equipped with a black widow. This added a lot of flavor to my tone before it was a bit dry. Out of the box it isn't great but with a bit of tweaking I was able to get some really usable tones nothing like a tube amp but still very usable.


what a blast

By Mikey

from Grapeview, WA

Comments about Korg Pandora PX4D Guitar Multi Effects Processor:

i mainly bought this so i could play while listening through headphones, and it does that perfectly. but being able to play basically any tone i want while having headphones on is so much better than i imagined! being able to scroll through all of the presets and all of the adjustments you can make is so much fun! it has definitely made my drive to learn guitar so much more intense, i cannot wait to get home and get my headphones on! easy to use, fun to play with...oh and sounds great through my amp also.


Live bass preamp

By Boonefiddler

from Central Iowa

Comments about Korg Pandora PX4D Guitar Multi Effects Processor:

Great practice headphone amp! Fun rhythms to jam with. Excellent for direct recording into a computer sound card for youtube videos. I use this live as a preamp for both my bass and guitar. I play in a trio, and use a small PA for my vocals, violin, bass and guitar. This thing makes my bass and guitar sound like they're going through bass and guitar amps, not direct into a PA. Handy tuner/mute button for me to switch instruments. Good backlight display. I only use a handful of presets, but they are good and work very well.

(1 of 1 customers found this review helpful)


This this is ridiculously awesome

By RobDawg

from Tampa, FL

Comments about Korg Pandora PX4D Guitar Multi Effects Processor:

I have been playing acoustic for maybe 5 years and started electric maybe 2 years ago. I started looking into effects and wanted a single unit that would let me play around with the various types of effects. I could not have made a better choice.I do not have enough money nor enough guitarist friends to play with all of the various pedals out there. That is why I wanted a single unit that I could experiment with. This single unit covers most of the types effects you will see out there... acoustic simulator, auto-wah, phasers, distortion, harmonizers, synthesizer.. etc,etc. I did not see a single other unit that had so many options.When I got it I spent about two hours going through the presets and felt that 70-80% would be fun to experiment with. 30% are sounds I think I will use regularly over the next few years.The sound of multi-effect pedals is kind of controversial. Many will say they sound great, others will say it sounds fake (maybe like records vs. cds). I would bet that most people who are not pros with all kinds of effects already would enjoy the sound... and maybe someone who already has 10 pedals and a tube amp might feel that it does not make the sound they want. I love the sounds.The other aspect that makes this fantastic for intermediate guitarists is that it comes with 100 drum patterns with associated bass lines. If you go into "chain" mode, you can put the patterns together and set the note for the bass for each bar. Its like a band in a box.The phrase trainer is fun to play with.. but this is the only part of the unit that I feel is not good enough for recording. The sound quality is muddy.. good enough for practicing but nothing like a dedicated looper.If you are a professional musician with a juicy expensive tube amp and maybe 10 pedals on the floor... perhaps this is not going to make the sounds you want. For anyone who is learning about effects or how to jam with other musicians... I couldn't recommend it more.

(1 of 1 customers found this review helpful)


Unbelievable! Pandoras Box!!!


from Dallas, TX

Comments about Korg Pandora PX4D Guitar Multi Effects Processor:

I just got this little guy in Friday and let me say that when I first opened it, to reveal a small electronic hand-held device only the size of an iPhone .. I thought to myself, theres no way this thing can do all it says it can and it sound great at the same time, boy was I WRONG WRONG WRONG!! Every effect you ever need is here! Along with the Amp Modeling & Cabinet Modeling, and this is also goes for Bass Players also ... The WAH features completely blow Boss's Dynamic-Wah Pedal away ... And you can pay the same price almost for this and have everything you need. Also it will record you playing a rhythm, then you can loop it playing continuously thru your AMP, as you solo to it or whatever you desire .. Do not look any further, do NOT waste money on single effect pedals, get this now!!!

(1 of 1 customers found this review helpful)



By Anonymous

from Undisclosed

Comments about Korg Pandora PX4D Guitar Multi Effects Processor:

The most inspirational piece of equipment you'll ever buy. This hand sized box is what a guitarist needs in the studio and on stage for easy access to great sounds and amazing tones. I use this religiously in my music and it is apart of my guitar as much as the strings or volume knobs. This should be in any musician's arsenal

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