Home
Amplifiers & Effects
Effects
Effects Pedals
Harmony & Octave Effects Pedals

MMGS7/000000122172425_MEDIA_SET

{ "slidesToShow": 1, "infinite": true, "arrows": false, "dots": true, "lazyLoad": "ondemand", "speed": 300, "mobileFirst": true, "swipe": true, "asNavFor":".desktop-image-viewer-nav", "responsive":[ { "breakpoint":975, "settings":{ "dots":false, "arrows": true, "asNavFor":".desktop-image-viewer-nav" } } ] } Used Donner HARMONIC SQUARE Effect Pedal

Used Donner HARMONIC SQUARE Effect Pedal

Play Video

{ "slidesToShow":7, "infinite": false, "arrows":false, "dots":false, "lazyLoad":"ondemand", "speed":300, "mobileFirst":true, "asNavFor":".main-media-viewer", "focusOnSelect":true, "centerMode":false, "swipeToSlide": true }

Product Images
Videos
Customer Images

{ "slidesToShow": 1, "slidesToScroll": 1, "infinite": false, "arrows": false, "dots": false, "lazyLoad": "ondemand", "speed": 300, "mobileFirst": true, "swipe": true, "asNavFor": ".modal-image-viewer-nav", "responsive":[ { "breakpoint":768, "settings":{ "arrows": true, "asNavFor": ".modal-image-viewer-nav" } } ] }

{ "slidesToShow":8, "slidesToScroll": 1, "infinite": false, "arrows":false, "dots":false, "lazyLoad":"ondemand", "speed":300, "mobileFirst":true, "asNavFor":".modal-image-viewer", "focusOnSelect":true, "centerMode":false, "swipeToSlide": true, "centerPadding": "0px", "responsive":[ { "breakpoint":1440, "settings":{ "slidesToShow":8, "asNavFor": ".modal-image-viewer" } }, { "breakpoint":1360, "settings":{ "slidesToShow":8, "asNavFor": ".modal-image-viewer" } }, { "breakpoint":1240, "settings":{ "slidesToShow":8, "asNavFor": ".modal-image-viewer" } }, { "breakpoint":1024, "settings":{ "slidesToShow":8, "asNavFor": ".modal-image-viewer" } }, { "breakpoint":976, "settings":{ "slidesToShow":8, "asNavFor": ".modal-image-viewer" } }, { "breakpoint":768, "settings":{ "slidesToShow":8, "asNavFor": ".modal-image-viewer" } }, { "breakpoint":600, "settings":{ "slidesToShow":6, "asNavFor": ".modal-image-viewer" } }, { "breakpoint":480, "settings":{ "slidesToShow":5, "asNavFor": ".modal-image-viewer" } }, { "breakpoint":375, "settings":{ "slidesToShow":4, "asNavFor": ".modal-image-viewer" } }, { "breakpoint":320, "settings":{ "slidesToShow":3, "asNavFor": ".modal-image-viewer" } } ] }

{ "slidesToShow": 1, "slidesToScroll": 1, "infinite": false, "arrows": false, "dots": false, "lazyLoad": "ondemand", "speed": 300, "mobileFirst": true, "swipe": true, "asNavFor": ".modal-video-viewer-nav", "responsive":[ { "breakpoint":768, "settings":{ "arrows": true, "asNavFor": ".modal-video-viewer-nav" } } ] }

{ "slidesToShow":8, "slidesToScroll": 1, "infinite": false, "arrows":false, "dots":false, "lazyLoad":"ondemand", "speed":300, "mobileFirst":true, "asNavFor":".modal-video-viewer", "focusOnSelect":true, "centerMode":false, "swipeToSlide": true, "centerPadding": "0px", "responsive":[ { "breakpoint":1440, "settings":{ "slidesToShow":8, "asNavFor": ".modal-video-viewer" } }, { "breakpoint":1360, "settings":{ "slidesToShow":8, "asNavFor": ".modal-video-viewer" } }, { "breakpoint":1240, "settings":{ "slidesToShow":8, "asNavFor": ".modal-video-viewer" } }, { "breakpoint":1024, "settings":{ "slidesToShow":8, "asNavFor": ".modal-video-viewer" } }, { "breakpoint":976, "settings":{ "slidesToShow":8, "asNavFor": ".modal-video-viewer" } }, { "breakpoint":768, "settings":{ "slidesToShow":8, "asNavFor": ".modal-video-viewer" } }, { "breakpoint":600, "settings":{ "slidesToShow":6, "asNavFor": ".modal-video-viewer" } }, { "breakpoint":480, "settings":{ "slidesToShow":5, "asNavFor": ".modal-video-viewer" } }, { "breakpoint":375, "settings":{ "slidesToShow":4, "asNavFor": ".modal-video-viewer" } }, { "breakpoint":320, "settings":{ "slidesToShow":3, "asNavFor": ".modal-video-viewer" } } ] }

{ "slidesToShow": 1, "slidesToScroll": 1, "infinite": false, "arrows": false, "dots": false, "lazyLoad": "ondemand", "speed": 300, "mobileFirst": true, "swipe": true, "asNavFor": ".customer-image-viewer-nav", "responsive":[ { "breakpoint":768, "settings":{ "arrows": true, "asNavFor": ".customer-image-viewer-nav" } } ] }

{ "slidesToShow": 8, "slidesToScroll": 1, "infinite": false, "arrows":false, "dots":false, "lazyLoad":"ondemand", "speed":300, "mobileFirst":true, "asNavFor":".customer-image-viewer", "focusOnSelect":true, "centerMode":false, "swipeToSlide": true, "centerPadding": "0px", "responsive":[ { "breakpoint":1440, "settings":{ "slidesToShow":8, "asNavFor": ".customer-image-viewer" } }, { "breakpoint":1360, "settings":{ "slidesToShow":8, "asNavFor": ".customer-image-viewer" } }, { "breakpoint":1240, "settings":{ "slidesToShow":8, "asNavFor": ".customer-image-viewer" } }, { "breakpoint":1024, "settings":{ "slidesToShow":8, "asNavFor": ".customer-image-viewer" } }, { "breakpoint":976, "settings":{ "slidesToShow":8, "asNavFor": ".customer-image-viewer" } }, { "breakpoint":768, "settings":{ "slidesToShow":8, "asNavFor": ".customer-image-viewer" } }, { "breakpoint":600, "settings":{ "slidesToShow":6, "asNavFor": ".customer-image-viewer" } }, { "breakpoint":480, "settings":{ "slidesToShow":5, "asNavFor": ".customer-image-viewer" } }, { "breakpoint":375, "settings":{ "slidesToShow":4, "asNavFor": ".customer-image-viewer" } }, { "breakpoint":320, "settings":{ "slidesToShow":3, "asNavFor": ".customer-image-viewer" } } ] }

{"id": "122172425", "categoryId":"site1HBAD", "pageName":"Used Donner HARMONIC SQUARE Effect Pedal", "pageUrl":"/pdp/productDetail.jsp?productId=site1prod122172425", "thumbnailUrl":"", "addToCartUrl":"/pdp/productDetail.jsp?productId=site1prod122172425", "hasFeatures":"0", "isAccessory":"0", "message":"Add expressive pitch-shifting textures with this used Donner HARMONIC SQUARE effect pedal in good condition. Designed for guitar or bass, it delivers harmony-style tones and creative modulation-style sounds with simple, stage-friendly controls. Compact and pedalboard-ready, it features standard 1/4" input/output, true-bypass switching, and 9V DC center-negative power. A great value for players who want unique harmonic color without a large footprint.", "value":"29.99", "priceMin":"29.99", "priceMax":"29.99", "priceSavingsMaxPrice":"0.00", "priceSavingsMaxPercent":"0", "inventory":"1", "brand":"Donner", "reviewStarImageUrl": "https://static.musiciansfriend.com/img/brand/mf/cmn/Sprit-Sm-Stars.png", "reviewStarRating":"0.0", "reviewStarRatingInteger":"0", "reviewHowManyReviews":"0", "usedOrNew":"new", "discontinued":"0", "onOrder":"0", "clearance":"0", "canBeSold":"1", "accessoryCategories":"", "stickerText": ""}

Donner Donner

Used Donner HARMONIC SQUARE Effect Pedal

Name: Used Donner HARMONIC SQUARE Effect Pedal
Brand: Donner
SKU: 122172425
Price: 29.99 USD
Availability: InStock

true false

SKU #122172425

29.99 $29.99

More ways to pay:

Share your location Order within 7 hrs 48 mins. 12 secs.

In Stock & Ready to Ship Orders placed before 3 p.m. ET usually ship the same business day (except weekends and holidays).

Ship to

Please enter 5 digits

Delivery Promise ×

Free Shipping

Free Standard Ground shipping (48 contiguous states, some overweight and Used/Vintage items excluded).
Orders placed before 3 p.m. ET usually ship the same business day.

Shipping and Delivery Times

Orders placed after noon Eastern time will ship no later than the following business day.
Some orders may be held for verification and may cause a delay.

If we promise a delivery date and a delivery attempt is not made by this date, we will provide a refund of any shipping fees associated with your order. Questions? Call 800-449-9128

site1sku122172425 true Change Location

This oversized item has special shipping requirements

The shipping company will call you to schedule your delivery date and time
Someone will need to be home to receive the package
Be sure you have measured your entryway and have help available to carry the item in

In Stock & Ready to Ship

Most orders placed before 3 p.m. ET ship same day (except weekends and holidays).

in_stock In Store Used

Good Condition

Good

This product is completely functional and shows some signs of use. It may have surface scratches and/or dings and dents.

Contact Seller

Why Guitar Center?

Guitar Center has made their collection of Used and Vintage gear–the largest one around–available to Musician's Friend customers.

Guitar Center Albany

(518) 446-1500 Email

Email Us

{"departments":[{"departmentName":"Gear Advisor Support","departmentId":"400001","departmentKey":"Gear Advisor Support","selected":"false","topics":[{"topicName":"Espanol","topicId":"1100001","contactKey":"Espanol","requiresStore":"false","selected":"false"},{"topicName":"Place an Order/Gear Advice","topicId":"400004","contactKey":"Place an Order/Gear Advice","requiresStore":"false","selected":"false"},{"topicName":"Customer Service","topicId":"400011","contactKey":"Customer Service","requiresStore":"false","selected":"false"}]}]}

Fill out the form below and the seller will get in touch with you as quickly as possible, or call the store where the item is located (during open hours) to speak with someone directly.

Department

Topic

Store

First Name

Last Name

Phone

Message

Contact Seller

Used Donner HARMONIC SQUARE Effect Pedal

View Cart

Oops!

Lowest Price

Gold Coverage Protection

36-MONTH

+ $14.99

24-MONTH

+ $11.99

12-MONTH

+ $9.99

No plan Selected

Protect your gear

Gold Coverage Protection

Gold Coverage goes above and beyond the manufacturer's warranty to protect your gear from unexpected breakdowns, accidental damage from handling and failures. This plan covers your product for one, two, three or up to five years from your date of purchase, costs just pennies per day and gives you a complete "no-worry" solution for protecting your investment.

Gold Coverage Includes:

Unexpected and unintentional spills, drops and cracks
Normal wear and tear
Power surges
Dust, internal heat and humidity

Other plan features include:

For products over $200, No Lemon Policy applies. If it fails for the same defect 3 times, it is replaced on the 4th breakdown. (Does not apply to failures due to drops, spills, and cracks)
For products under $200 experiencing the above failures, a Musician's Friend gift card will be issued for the full price of the product + tax.
Shipping fees covered if required for repair or replacement
Plans are transferable in the event merchandise is sold
Plans are renewable on new gear

*Limitations and exclusions apply. See terms and conditions (Opens in new window) for program details

Term for New Gear begins on date of purchase but does not replace the store return policy or manufacturer coverage.

Overview

Add expressive pitch-shifting textures with this used Donner HARMONIC SQUARE effect pedal in good condition. Designed for guitar or bass, it delivers harmony-style tones and creative modulation-style sounds with simple, stage-friendly controls. Compact and pedalboard-ready, it features standard 1/4" input/output, true-bypass switching, and 9V DC center-negative power. A great value for players who want unique harmonic color without a large footprint.

Shop with a Friend

2-Year Free Warranty on Guitars

Every guitar or bass you purchase from Musician's Friend (electric or acoustic, New or Open Box) includes two years of protection from manufacturer defects.

We're Here for You

Our Gear Advisers are available to guide you through your entire shopping experience. Call or Chat for expert advice and to hear the latest deals.

Want to customize your own bundle?

Our Gear Adviser are ready to help.

Musician's Friend Support

A Gear Adviser is ready to take your questions

Our Gear Advisers are currently offline

Call Us Let's Chat(opens in new window) Request a Callback

MON - FRI 6 AM - 8 PM PT

SAT - SUN 7 AM - 7 PM PT

Looking for something else? Find answers at our Help Center

{"product":{"sku_rep_id":"site1sku122172425","wasPrice":"29.99","sticker":"","sku_id":"122172425","title":"Used Donner HARMONIC SQUARE Effect Pedal","rep_id":"site1prod122172425","download":false,"price":"29.99","checksum":"23457000823","name":"Used Donner HARMONIC SQUARE Effect Pedal","CTAButtonText":"Add to Cart","id":"122172425","stock":"instock","commerceType":"In Store Used","brand":"Donner"},"dept":"Amplifiers & Effects","category":"Effects","subcategory":"Effects Pedals","pageName":"product_detail"}

Your Cart Is Empty

Used Donner HARMONIC SQUARE Effect Pedal

This oversized item has special shipping requirements

Email Us

Oops!

Gold Coverage Protection

Musician's Friend Support