Roland TB-303

“This 303 is in great condition, with the exception of the fading/discoloring which is typical for its age. All of the switches were recently replaced by a professional technician and programming is a breeze. This unit is completely free of corrosion. The only issue is that the decay pot is slightly stiffer than the rest. Ships with printed manual and ac adapter (not pictured)

Due to its age and the delicate nature of vintage electronics, this unit is being as-is.”
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Roland TB-303

“I’ve had some fun over the years with this acid box 

but I think it’s time for someone else to have a go with an original.

Comes with power supply, fully working, buttons and knobs are good, 

also included, polystyrene shell, manual & an old but original cardboard box. ”
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Roland TB-303

“Very special TB303, you’ll struggle to find a better example in terms of condition and just fully serviced so working perfectly. Looks like it just came out of the factory.

Comes with Roland carry case, sync to midi converter and brand new Roland/Boss authorised 9V charger. Just serviced by HKA Design in Surrey.

Own a piece of music history and an era defining bit of kit. ” Click here to visit listing on eBay

Roland TB-303

“Roland TB 303 Bassline Synthesizer quicksilver cpu blotchy case see photos.

I bought this 303 off eBay USA in 2008. It sounds great for a 303, I love the sound of it more than the previous 303 I owned and sold in 2005.

It has the quicksilver CPU which is more powerful than the original CPU. But it’s programmed in a slightly different way, you’ll need to get the manuals and cheat sheets on your favourite search engine.

Comes with power supply.” Click here to visit listing on eBay

Roland TB-303

“Classic TB 303 Bassline. Rarely used and still in good condition.

Stored in a smoke free environment and batteries regularly rotated, no historic leakage.

No modifications. 2 power supplies, an old EU plug and a newer UK Kenton plug.
Has original Roland case.

Printed out user guide but can easily be obtained online.

Still sounds sweet but selling to release funds for a USB based set up.”

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Roland TB-303

“roland tb 303.the original and best,, have the silver with roland in orange carry case also and a hard case with lots of paddind nice tight fit the 303 has colin fraser of seqentix fame midi kit fitted and it keeps time amazing great midi bassline kit also when colin fitted this he replaced all the tack switches as well sounds lovely and no double pressing annoying tack switches slso manual etc really dont want to sell it as ive had it 25 years but needs must seen them go for up to 4000 as of late get6 ithe origian and best sounding little siler box,,” Click here to visit listing on eBay

Roland TB-303

” Original Roland TB-303 – Bass synthesizer -Good Condition.
Has been in home studio and storage,hardly used.
Lights up when plugged in so should work.
Has modifications:
1 Midi in and out-comes with leads
2 Appears to have a CV input for the filter
Sequential MIDIBass MIDI modification
Some superficial marks and scratches”
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Roland TB-606 with Roland TB-303 Project Machine

“Roland 303 synth (Repair/Spare) – Roland 606 drum machine (working).

Roland 303 synth kenton midi upgrade not working. had the pots and switches no longer working, bad connection. I think was also a problem never got to having checked out with regards to clearing, writing tracks. it played OK from stored memory, pots were good you could play around with it hooked it up to the 606. if you know a synth tec that has good experience knowledge, and you’ll have a working 303. purchased the pair from friends friend only intend to keep short while… though they both rolands OK… but clearly not.

Roland 606 drum machine in working order.”

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Roland TB-303

“The TB303 Bass Line was designed to some extent as a partner-in-rhythm for the TR606 Drumatix drum machine (also available if interested)

– Was used in home studio only from new

– Has been in dry storage for many years (without batteries)

– Fantastic condition with NO wear marks on ether the buttons, knobs or transfers

– No modifications, all original

– Supplied with the original Roland carrying case, but unfortunately the original box has long gone

– Batteries included :-)” Click here to visit listing on eBay

Roland TB-303

“The TB-303 is a bassline synth released, manufactured between 1981 and 1984. Designed to simulate bass guitars, it has a single oscillator which produces either a ‘buzzy’ sawtooth wave, or a ‘hollow’ square wave. Only 10,000 units were ever manufactured by Roland, it was unpopular to its target audience and was discontinued just 3 years after release, with the remaining units sold off cheaply.

The TB-303 includes a mini one-octave ‘piano’ keyboard, each key complete with a red light. In the same way a drum machine plays patterns of drum sounds, the 303 does the same thing with basslines. Using the keyboard to enter the correct note and its length, the user can program a bassline one note at a time which will then play along in time with the drum beat.

Six rotary controls let you manipulate the tone of the TB-303 so you can tweak the sound to your personal taste.

This TB-303 comes with a Kenton Pro 2 MIDI to CV dual channel converter and connecting 3.5mm connectors which have been re-labelled.

This unit was from a commercial recording studio that closed down in the 90s and has been in storage since closing. It has now been recently serviced ready for sale and is in generally great condition with only some minor marks as to be expected from used studio equipment.

Included is the Roland TB-303, Kenton Pro 2 and connecting 3.5mm cables to connect the two. No original boxes, power cables or manuals supplied. Digital copies of the manuals can be found on the internet. The items will be securely packaged for transit and insured to the full amount (hence increased postage costs).” Click here to visit listing on eBay

Roland TB-303 with Roland TR-606

““Both are in Great Condition—Tested , work great —Both came from same owner —been in storage —Clean Condition—Battery compartments are clean —missing 1 battery cover —all buttons and knobs work on both units —THESE ARE RARE AND DO NOT MISS OUT —see all pictures and ask any questions—may show normal wear—”” Click here to visit listing on eBay

Roland TR-606 with Roland TB-303

“Up for grabs in this auction arr a pair of classic synths: Roland TB-303 & Roland TR-606. Both come with original cases and cord. Both cases and the power cord came with these synths.

These were acquired as a pair from the same local seller almost a decade ago. From what he told me, I have only been the third owner of these devices. Both are functional, except for the 303’s saving functionality which erases after a while but that could easily fixed.

Cosmetically, both devices are sound and cleaned. The previous owner placed two small stickers on the 303 which can be seen in the photos.

I have loved these two machines and have utilized them in the studio and live. I hope they can go to someone willing to care for them and use them properly. ” Click here to visit listing on eBay

Roland TB-303

” I bought this TB-303 a year ago from the original owner who had all the switches replaced by a reputable tech. Works great, all buttons and knobs function as they should, although the volume knob is a bit crackly when turned. Once you settle on a volume, it isn’t noisy.

The other obvious issue is the smiley stickers.. seems the original owner used an alcohol-based cleaner once and ended up discoloring the plastic. He covered it up with the stickers and I didn’t bother taking them off, so I have no idea what it looks like under there!

The rest of the unit is in good condition for it’s age, with all of the lettering intact, and a spotless battery compartment. I’m selling because I have another 303 with the Sequentix midi-bass mod, so it’s time for this one to find a new home. Thanks for looking!” Click here to visit listing on eBay

Roland TB-303 Project Machine

“Roland Bassline TB-303 – Comes with original Roland Case.

Came with a job lot of gear – Doesn’t have power supply so unable to test.

Comes with original Roland Carry Case & Battery Compartment Cover (not in photos)

Photos show condition of unit and form part of the description. Opened the casing to take internal photos, does not look butchered or messed about with internally.”
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Roland TB-303

” Roland TB-303 Bass Line Synthesizer with Original Case & Cover – Mint – Like NEW!

This is your chance to own a Roland TB-303 as close to brand new as possible.
If your a collector or serious acid head, this is your chance to own a legend that looks like it just came out of the box yesterday.

Unit is completely unmodified and works and looks like it is completely brand new. You won’t find a unit in better condition.

Everything functions 100% and sounds incredible

Comes with:
Original Roland Carrying Case
Decksaver Cover
New Roland/Boss PSA Power Supply

Unit will be bubble wrapped and boxed with care for shipping.” Click here to search for synths on eBay

Roland TB-303

“Roland Computer Controlled TB-303 Bass Line with Original Owner’s Manual and Carrying Case with shoulder strap. Condition Is Used.
I am the original owner and I am selling this unit AS IS, NO REFUNDS and NO RETURNS. I bought this unit shortly after they became available in music stores. I used this unit with the Roland TR-606 Drumatrix. I put it away after sequencers and sound modules became available. I recently placed batteries in it and turned it on (there was some slight static noise when I turned the unit on) and I did some basic programming and the unit worked fine. The unit has some slight abrasion on the front and back panels of the unit which I believe is from the carrying case. This unit was not checked out by a professional technician.” Click here to search for synths on eBay

Roland TB-303

“Roland TB-303 Computer Controlled Bass Line with Owner’s Manual
You are bidding on
Roland TB-303 Computer Controlled Bass Line with Owner’s Manual


Up for auction is a Roland TB-303 Computer Controlled Bass Line with Owner’s Manual.
Item is pre-owned and in good condition.
Unable to fully test without cords, but the unit lights up when powered on with batteries. ” Click here to search for synths on eBay

Roland TB-303

“Roland TB 303 – Rare Quicksilver CPU.

Condition is Used. Dispatched with Royal Mail 1st Class & courier tracked


TB303 with fitted quicksilver CPU Mega Rare to find the CPU and tough to find someone to fit these


TB303 great condition / no leaks / no wearing down of the pots – comes with manual & original CPU chipset – yes also plug Uk


Works beautifully


Kenton CV kit -also fitted


Midi fitted


Incredible silver box – ignore the re-issues and clones this is as good as 303s get.

Some say Devilfish is better but to be honest I prefer Quicksilver. Grab this before it goes to a new home never to be sold again !” Click here to search for synths on eBay