The Laney Model 18, used in conjunction with Sets33, presents a unique scenario that might require specific troubleshooting steps or fixes. By engaging with the community, seeking out expert advice, and following best practices for software and model management, users can often find solutions to their problems.
I’ve interpreted this as a restoration or repair log of a vintage Laney Model 18 amplifier (a classic 18-watt, all-tube practice/boutique amp from the late '60s/early '70s), performed by a small repair shop called "A Little Agency," with a specific mod/fix labeled "sets33."
The phrase “sets33” appeared inside the chassis, written in sharpie on the fiberboard. No schematic reference. No service bulletin. But the PI (phase inverter) tail resistor measured 33k instead of the stock 47k. And the negative feedback loop had a 33k in parallel with a 4n7 cap. a little agency laney model 18 sets33 fix
Someone had been in here. Someone with an agenda.
We traced it. The “sets33” fix is a pre-gain cathode mod—on V2, pin 3, they had swapped the 1k8 for a 1k and slammed a 33µF bypass cap in parallel with a 33k resistor. It looks wrong. It is wrong. But it's also right. The Laney Model 18, used in conjunction with
The Laney "A Little Agency" Model 18 is a fantastic acoustic amplifier—warm, feedback-resistant, and lightweight. The "sets33" error is frustrating but fixable. If you have basic soldering skills, replacing the C68 capacitor and reseating the FX board will likely solve your problem for less than $5 in parts.
If the error persists after the hardware fix, the DSP chip itself may have internal damage. In that case, Laney no longer supplies replacement DSP chips for this generation (as of 2025). However, you have two options: The phrase “sets33” appeared inside the chassis, written
Don't scrap your amp over a "sets33." With patience and this guide, you can bring your "Little Agency" back to life.
Have a different error code? Comment below with "Laney Model 18 setsXX" where XX is any number, and we will decode the next fix.
The ALA Model 18 has a small vertical PCB (the FX board) plugged into the main board. Thermal cycling loosens the solder joints on the connector headers. A tiny crack causes intermittent communication, which the CPU interprets as "sets33."
Set your multimeter to DC Volts (20V range).