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 26 - Jul 31

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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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4.8 ★★★★★
Based on 14 reviews
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mo dale
Battle Creek, US
★★★★★ 5
Great thing to have.
Size: 9 inches
Great thing to have. For my small yard, it is perfect for me. Yes, the battery life does not last as long as I would like be, but I would buy this again. Great power and speed.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on March 14, 2026
A
Verified Purchase
Amazon Customer
Grantham, US
★★★★★ 4
Edging made easy
Size: 9 inches
Surprised how well this works. I was looking for no cord for long driveway. The battery takes a bit to fully charge, but lasts for the entire job. The levels for depth make edging around d flower beds or raised beds easy- not really a trench, but gives a good edge. Lightweight and easy to manage. Definitely lighter than my corded edger. The blade is sensitive and the guide to keep it steady along concrete is not great- just need to make sure you watch closely or it will spark when it hits the concrete.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on July 26, 2025
J
Verified Purchase
Jeff B.
Lowell, US
★★★★★ 5
Works well, a little under powered
Size: 9 inches
Works well, a little under powered when I used it for the first time. Once you get the groove established it works great to maintain it
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 22, 2026
G
Verified Purchase
gbd99
Chelsea, US
★★★★★ 1
It’s junk
Size: 9 inches
Deserves a zero. Like some others said on here, it runs for 3 seconds and just stops with battery fully charged. I got it for Christmas so too late to return. More China junk.
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Reviewed in the United States on April 25, 2026
J
Verified Purchase
John J.
San Leandro, US
★★★★★ 5
Great price, does a good job
Size: 9 inches
 I’m mostly old. School when it comes to yard equipment. A gas engine has got to be better than a battery . I have  a weed eater that will take out a tree but makes a lousy edger. Since I  don’t have a large lawn, I gave this guy a try. Turns out it does a pretty good job. Can’t beat the price and it’s simple to use. Be aware, this vendor sells the unit only. They have no spare parts and you will need to source replacement blades. ( they supply 1 spare). Otherwise, worth a try. John J Why did you pick this product vs others?: A cheap price and a limited need.
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Reviewed in the United States on July 15, 2025

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