CB-061
MODULE
// UNIT CB-204 · BENCH 3 · SIGNED BY M. ZIELINSKA
Nullwave mono synthesiser▮
SERIALNW-1983-0412
SOAK LOGGED02:04:11
SIGNED OFFM. ZIELINSKA
BENCH DATE22 SEP 2026
Three photographs, taken on the packing table the day the unit was listed. Nothing is a stock image and nothing has been retouched — the marks you can see are the marks that are on it.
CB-204
RESERVE
4 290zlincl. 23% VAT · free delivery in Poland
5 in stock · dispatch within 48 h
A 1983 mono synthesiser stripped to the board, recapped, re-bushed and run for two hours at full load. Sold with the test sheet that came off that run.
Compare with the other 11
PACKED
LAST JOB BEFORE PACKING
The last job on this unit — a fuse holder reflowed on bench 3 the morning it was packed.
// CARTON CONTENTS
What the carton holds
✓The CB-204 itself, 4.1 kg, in a cut foam cradle
✓12 V 2 A regulated supply, your chosen plug
✓Two 1.5 m patch leads, 3.5 mm to 6.35 mm
✓Printed voice card with all 24 factory patches
✓Signed test sheet with the soak log and date
✓Spare fuse set and two keybed bushings
✗Sustain pedal — 140 zl, say the word and it goes in
✗Flight case — 690 zl, built to this unit's dimensions
✗MIDI cable, because everybody already owns six
Packed weight is 6.8 kg. The outer carton is double-walled and the unit is suspended on foam so nothing touches the wall.
Carton dimensions are 620 × 420 × 180 mm, which is inside every courier's standard band, so there is no oversize surcharge anywhere we ship. If you are collecting in person we hand it over unboxed with the foam folded flat, and you can play it at the counter first.
Ask for the full parts list
// READOUT
Signal path and numbers
37Keys, velocity, no aftertouch
1 + subOscillators, saw / pulse / triangle
24 dBLadder filter, self-oscillates from 32 Hz
2Envelopes, 1 ms to 12 s
64Sequencer steps, four banks
DINMIDI in and thru, plus CV and gate out
4.1 kg480 × 320 × 95 mm on the desk
12 V2 A regulated, 780 mA measured draw
Measured on bench 3 at 23 °C after the two-hour soak. The draw figure is the average over the last thirty minutes of that run, not a figure off a label.
AFTER YOU RESERVE
From order to doorstep
HOUR 0 – 48
Held for 48 hours
The moment you reserve, this unit comes off the shelf count and a payment link lands in your inbox. Nothing is charged until you follow it, and nobody else can take the unit in the meantime.
DISPATCH DAY
Final power-on, then packed
Forty minutes on the rack, a wipe down, your plug fitted, and a photograph of the unit as packed. That photograph goes in the dispatch email with the courier tracking number.
DAY 1 – 30
Thirty days to change your mind
Send it back in the carton it arrived in. You pay the return label, about 35 zl in Poland; if it developed a fault, we pay and the refund clears within three working days of it reaching the bench.
// QUERY LOG · CB-204
Five asked about this unit
HOW WORN IS THE KEYBED REALLY?
All 37 bushings were replaced, so there is no side wobble on any key. Three white keys carry visible playing marks on the front edge, photographed in slide two. Velocity response was matched across the board to within 4 units of the scale.
DOES THE SEQUENCER SYNC TO A DAW?
Yes, over MIDI clock on the DIN input. It follows start, stop and continue, and holds tempo to within 1.5 ms of the host across a four-minute test. There is no USB on this generation, so you need a DIN interface at the computer end.
WHICH PARTS DID YOU ACTUALLY REPLACE?
Every electrolytic capacitor on the power and voice boards, the mains fuse holder, all 37 keybed bushings, both output jacks and the pitch wheel potentiometer. The filter chips and the keyboard scanner are original and tested good. The full parts list is on the test sheet.
CAN I TRY IT BEFORE I COMMIT?
Come to the counter at ul. Rusalka 12 any time between Tuesday and Saturday and we will have it powered on with headphones. If Lublin is too far, ask for a video: we record a four-minute pass through the patches with whatever you want to hear.
WHAT HAPPENS IF IT FAILS IN YEAR TWO?
The warranty runs 24 months from delivery, so year two is still covered for parts and labour on anything we touched. We send a courier, fix it, and send it back. After the 24 months you still get priority in the repair queue and the bench rate stays at 180 zl an hour.
// STILL DECIDING
Send us the room, we will send back an answer
Tell us what you already own and what the CB-204 would be doing in that setup. If it is the wrong unit for you we will say so and point at the right one, including the ones we do not stock.