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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)
  • Output:
  • 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:
  • 40-208BPM
  • 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
  • Weight:
  • 0.30 lbs./138g (not including batteries)
Pro Coverage
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 10 reviews)

Ratings Distribution

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Reviewed by 10 customers

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(15 of 17 customers found this review helpful)


If you only buy one effects tool for your guitar..

By Trisk

from Minneapolis, MN

Comments about Korg Pandora PX4D Guitar Multi Effects Processor:

(Note, I own the Pandora PX4, which to my knowledge is the same, just lacks the bass patches and only has 50/50 patches instead of 100/100.) OK. Any serious electric guitar/bass player needs to go buy one of these. Right now. For the price, the variety of sounds it can produce are INCREDIBLE. I can loose hours just playing around seeing what kind of crazy sounds I can get out of this thing. As a practise tool, you just aren't going to get a better product. I absolutely love the Pandora! I am seriously considering buying a second one I love it so much! I've shown it to some guitar playing buddies, and they were blown away as well with how much fun this little box is! Something packed with this many features is bound to have a couple of flaws, and the Pandora is no exception. While I've had no problems with it in the year I've owned it, it has a slightly cheap, plastic feel to it. I take care of it and don't beat it around, but I have a feeling that someone who is hard on their gear may end up breaking some of its delicate little knobs and buttons. Cycling through the hundred sounds this thing packs can be a bit of a pain, especially when you can't remember where to find a specific sound you want to play with. Finally, as a practice or play tool, it is great, but as a performance tool I would be leary. Many of the effects produce a noticeable hiss in the background. If you need a multi-effects system for performance, you are probably better off with a pedal board from Line 6 or similar. Then again, those cost twice as much as this... Finally, as a PX4 owner, I must admit to raising my eyebrows at the PX4D's addition of bass patches. As a guitar player, why would I want that on my PX4? (Same goes for a bass player and the electric patches...) It just means more flipping through patches I don't use to get to the one I want. Beyond those small complaints, I love playing with the Pandora unconditionally! Stop sitting on the fence and buy one! Of all my guitar effects toys, this is by far my favorite!

(8 of 8 customers found this review helpful)


Worth Every Cent

By mrgtr37

from Elyria, Ohio

Comments about Korg Pandora PX4D Guitar Multi Effects Processor:

I am a home guitar player and I am pretty choosy about my sound, but I passed up some good deals from guitar center on some major name combo amps when I found this little magic box. I am impressed with the versatility of the PX4D and the sound quality is fantastic. even with the presets, you can make adjustments and with good headphones it is the best practice amp because I can play at night and not wake the neighbors But wait until Morning !!!!! ) The versatility was the main selling point for me. I can play along with cd's and mp3's or use it in my effects chain with an amp and it would replace all the pedals I would need to get a good sound. The only bad thing is headphones and an AC adapter are not included, but it is still a great deal.

(7 of 10 customers found this review helpful)


Pedalboard in the pocket

By BassPlayer

from Clearwater, FL

Comments about Korg Pandora PX4D Guitar Multi Effects Processor:

I own PX4B - the same device, but for bass only. It is incredible. At first I tried it in store and spent about 3 hours playing on it because I cannot stop. This piece of technology is incredibly small and lightweight. One set (4) of batteries works for about 10 hours. Almost all stock presets are great and doesn't require any tweaking. Drum machine patches covers all required patterns for practice. Jam feature allows you to jam with yourself for hours (like I do), bass canceling is also useful and allow you to play along with your favorite bands. I've found this device a bit noisy on some presets, but after some tweaking I'm able to get noiseless sound good for recording. On the rehearsal I've found that presets require some modifications to play through amp. Didn't play through PA yet. Resume: this is ultimate training machine and excelent gear to play through PC. Worth every penny.

(6 of 6 customers found this review helpful)


Great Personal Effects Processor

By George K. Abraham

from Mill Creek, WA

Comments about Korg Pandora PX4D Guitar Multi Effects Processor:

I am a hobbyist when it comes to my guitar work and as such I do most of my recording and effects processing using my personal computer. I used to pipe my guitar through a Pocket RockIt headphone amp directly into my laptop. After my Pocket RockIt developed problems, I looked for a new mini amp/effects processor. After considering many solutions (including the Pocket RockIt V2, the Dunlop Rockman Guitar Ace, the Dean Stack in the Box, and the M-Audio Black Box) I got the ToneWorks Pandora PX4D. This little box delivers a lot of features for it's size and price tag. I found my Ibanez RG470L producing sounds I never thought capable. Coupled with a Belkin TuneTalk recorder and my iPod, I now have a completely portable recording solution for my guitar work--I highly recommend this product.

(2 of 2 customers found this review helpful)


The Best Personal Practice Room In A Box!

By Tim

from Iowa

Comments about Korg Pandora PX4D Guitar Multi Effects Processor:

I did not purchase the PX4D as a live effects processor. Rather, for me the PX4D is the slickest little personal practice device on the market. I'm surprised Korg does not push this aspect of the PX4D a bit harder. With a reasonable set of headphones, the sound from the PX4D is great. Works with both active and passive instruments. I use it with my acoustic 6-strings and my electric basses. The built-in drums/metronome sounds are not so great for live use but are excellent if you're just practicing. And with the AUX IN, you can plug your MP3 player directly into the PX4D and learn the latest covers. You can also record short phrases and slow them down to learn them slowly then build speed. The PX4D also sports a reasonably good built in tuner. Battery life for the PX4D is very good, especially if you do not turn on the backlighting feature. A wealth of effects and modeling as well. In summary, the PX4D is a great headphone amp, a metronome, a drum machine, a phrase trainer, a tuner, and yes, and effects processor. Everything you need for practicing. All this in a package roughly the size of a cigarette pack. I toss the PX4D, headphones, mp3 player and cord in my gig bag any practice anywhere without bothering anyone.


1 of the best

By Seann_Benton

from Orlando, FL

Comments about Korg Pandora PX4D Guitar Multi Effects Processor:

I had just bought the Pandora a couple of days ago and i can't quit playing with it. There are so many features and effects and it is so compact. I found it hard to believe as small as the pandora is, it has very very god quality of the effects. The onlt probably i have with it is there is no quick way of changing from one effect to another. Other than that, it is great for gigs, recording, and for practise. I LOVE IT!!


great portable unit

By Macman

from Austin, TX

Comments about Korg Pandora PX4D Guitar Multi Effects Processor:

This is a superb little gizmo. I have owned it for 1 year. Whenever I am traveling with my guitar or before gigs I practice with this thing through headphones. The built in drum beats with bass are a god send for practice. I use this PX4D all the time. The buit in effects are very good and the preset patches are very useable. You can tweak some great sounds out of this unit. For portability and practice the PX4D rocks. I would certainly buy again if lost or stolen.


ToneWorks Pandora PX4D

By sohaibh

from Warwick, RI

Comments about Korg Pandora PX4D Guitar Multi Effects Processor:

For the price, this is a great studio effect pedal. Its a shame you cant use it for live performances. It has 25 amp types. It also has a ton of effects which include a talk effect, pictch shifter etc. It has 200 presets. 100 are factory and 100 are user editable. It is extremely easy to use. It has a huge Jog type dial which you use to go through the menu and the patches. It is also backlit. Another thing it has is the aux in jack which you can use for backing tracks. Definately worth the money.


Great Multi-effects

By John

from Syracuse NY

Comments about Korg Pandora PX4D Guitar Multi Effects Processor:

I have owned many different multi effects pedals. Most of my use is personal and not live so I am not talking about multi-effects for those who need to gig. Yet the problem with most is they are easy to use and sound very digital and thin or you have to pay an arm and a leg and constantly bend over to make changes which can be a real pain. Pods are ok and so is the vamp but they lack the luster or you need spend more for just a few more patches and get allot that don't sound that great. The volume changes and you end up having to keep messing with your amp. This unit kicks as it is smooth and analog sounding it inter phases well with my amp and I get no distortion I use a Peavey Valveking 112 for practice. So not sure what the person who had issues was talking about. Must be user error. Headphone volume powers my Grados pro headphones which is nice for silent practice. The sounds are very useful and the unit pretty easy to use. Best a drum machine with it and you can even put in your ipod or mp3 to play along with. Highly recommended for the price. Can't beat this. Try it it's a matter of taste.


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.

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