SKU: 43857376679

LRB-303 DIY 303 Kit

Sale price$327.15 Regular price$363.50
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Ships within 48 hours · Estimated delivery Jul 25 - Jul 30

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Description

LRB-303 DIY 303 KitPLEASE READ There are a limited number of kits in stock. A second large batch has been ordered and will be ready to ship in 2 3 weeks so I am making those available to order now. Orders will fulfilled in the order received. If you are interested in an assembled device click here This a complete kit to build the LRB 303 synthesizer. This is NOT a beginner kit and some kit building skills are necessary. Boards are 4 layer FR4 ENIG plated and fully ROHS

PLEASE READ

There are a limited number of kits in stock.  A second large batch has been ordered and will be ready to ship in 2-3 weeks so I am making those available to order now.  Orders will fulfilled in the order received. 

If you are interested in an assembled device click here

This a complete kit to build the LRB-303 synthesizer.    This is NOT a beginner kit and some kit building skills are necessary.  Boards are 4 layer FR4 ENIG plated and fully ROHS Compliant.

Tools Required:

Soldering Iron 
Solder (ROHS SAC305 solder is used on the board)
Trimmer Adjustment Tool or Small Blade flat screw driver
Wire Strippers

BUILD GUIDE HERE (work in progress)

User Manual: https://github.com/djphazer/OS-303/wiki/User-Guide

Build Support can be found on the Discord Channel

This kit includes:

  • SMD populated LRB-303 Mainboard
  • SMD populated LRB-303 Switchboard
  • Alps Tact switches, LEDS, Standoffs
  • Switched DIN Socket
  • Mainboard Through hole parts (8 Pots, 2 Brackets, Slide Switch, Audio, DC, CV Jacks)
  • Precut and Tinned Ribbon Cables (4 Pcs)
  • Alps Rotary Switches
  • Precut interconnect wires
  • OS-303 Processor with MIDI harness
  • Dust Covers (4 pcs)
  • Rub-on Case Art Sheet
  • Metal Keyboard panel

NOT Included:

  • Knobs/ Button Caps.  Available from Krumptronics or Sound to Parts
  • Case AVAILABLE HERE

Case Ordering Instructions:

Any Material Can be used for the case however I recommend 9600 Resin with Spray Painted Surface finish.  That is proven good.  JLC will probably complain about wall thicknesses, tell them that you accept it as is.   Clear is cool however the material does not have great dimensional stability so warping with clear is possible, YMMV.  Make sure you select "Plastic Enclosure" as the application

Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
  • Except Preorder products are shipped in 48 hours.
  • Delivery to the USA:
  1. Standard Shipping : 3-10 business days
  • If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
  • We offer a 30-day return/exchange service after receiving.
  • Final sale items are not eligible for returns or exchanges.
  • To process your return/exchange, please contact us at [email protected]
  • Please click here for more details>>> Return & Exchange Policy
SKU: 43857376679

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Amazon Customer
Lake Worth, US
★★★★★ 5
Great for outdoor cats in the summer
Color: Gray, Size: 18"x24"
I bought this for my outdoor cats specifically for the summer since it’s get really hot. I always see them relaxing on this and they seem to love it. It’s easy to wash and is quite soft. It’s also quite thick and of good quality.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 18, 2026
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Mel
Massapequa, US
★★★★★ 5
Nice bed
Color: Blue, Size: Large (Pack of 1)
Good quality dog bed. My pittie loves to burrow himself under blankets so I figured we would give this a try. He hasn’t figured it out yet but it’s his new favorite spot to take a nap when he’s not on our lap. Love the color and seems to be nicely made. I do wish it came in a bigger size but it’s still big enough for him.
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Reviewed in the United States on February 22, 2026
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Katie Campbell
Grantham, US
★★★★★ 5
Nice quality bed
Color: Blue, Size: Large (Pack of 1)
Nice quality. My dog loves laying on this bed but hasn’t yet figured out getting inside. I cover him after he lays and he seems to enjoy it
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on December 28, 2025
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Steven
Carnegie, US
★★★★★ 4
Cozy Bed, Just Needs Fluffing
Color: Blue, Size: Large (Pack of 1)
Our dog took to this bed pretty quickly and seems to like curling up under the cave cover. It’s soft, roomy, and gives that little tucked-in feeling a lot of pets seem to love. The cover doesn’t always stay perfectly shaped, so I have to fluff it back up now and then. Other than that, it looks nice in the corner and seems comfortable enough for daily naps. Solid bed overall, especially for the price.
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Reviewed in the United States on April 9, 2026
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Lawrence J Earl
Fort Morgan, US
★★★★★ 5
Great for the money
Color: Blue, Size: Large (Pack of 1)
Really beautiful, I'm not sure of what size I got but it is BIG, I have a 50lb Boston terrier and he gets lost in it, very soft with a lots of foam, he loves it
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Reviewed in the United States on January 4, 2026

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