I provide professional repair, troubleshooting, maintenance, modification, and customisation services for audio electronics used by musicians, producers, studios, and audio enthusiasts.

My work combines electronics knowledge with practical experience in sound engineering. I do not evaluate equipment only as a circuit: I also consider how it behaves musically, how it interacts with the rest of the signal chain, and what the user actually needs from it.

The goal is not simply to make a device turn on again. It is to restore reliable operation, preserve its original character when appropriate, and improve performance only when a modification provides a real technical or musical benefit.

Depending on the model, condition, documentation, and availability of components, I may work on:

Preamplifiers

Compressors and limiters

Equalisers

Effects units and pedals

Mixers and signal-routing equipment

Synthesizers and electronic instruments

MIDI equipment

Samplers and sound modules

Studio processors

Power supplies

Analog and mixed-signal audio devices

Custom-built or modified equipment

Utility devices for studio and live use

Every project is evaluated individually before acceptance.

Repair services may include:

Fault diagnosis

Signal tracing

Noise, hum, crackling, and interference reduction

Loss of signal or intermittent operation

Distortion and unwanted saturation problems

Power supply faults

Grounding issues

Connector, switch, and potentiometer replacement

Capacitor replacement and recapping

Damaged component replacement

Calibration and adjustment

Preventive maintenance

Cleaning and restoration of controls and contacts

Functional and listening tests

When appropriate, I also evaluate frequency response, output level, dynamic behaviour, noise performance, and other relevant technical parameters.

I offer carefully evaluated modifications designed around the actual limitations of the device and the client’s intended use.

Possible modifications may include:

Noise reduction

Power supply improvements

Grounding optimisation

Signal-path refinement

Component upgrades

Op-amp replacement

Capacitor and resistor value optimisation

Tube replacement and circuit adaptation

Headroom improvement

Distortion-character modification

Compression-response adjustment

Input and output level adaptation

Balanced or unbalanced connection modifications

Additional controls or routing options

Custom bypass solutions

Reliability improvements

I do not replace components simply because they are more expensive or considered “audiophile”. Every modification must have a clear purpose and must be compatible with the original circuit.

A technically unnecessary modification can make a device less reliable, less musical, or simply different rather than better. If I believe the requested modification would not provide a meaningful benefit, I will explain why before proceeding.

I can also design and build custom audio devices according to the client’s needs.

Projects may include:

Custom effects units

Preamplifiers and signal-conditioning circuits

Studio utility devices

Audio routing and switching systems

Custom interfaces

Passive or active summing devices

MIDI-controlled audio functions

Instrument electronics

Experimental sound devices

Analog synthesizer modules

Bespoke circuits for specific studio workflows

Custom projects are developed according to the required function, signal levels, available space, power requirements, budget, and intended operating environment.

Each project begins with a preliminary evaluation.

Before accepting the job, I may request:

Brand and exact model

Serial number when relevant

Clear description of the fault or desired modification

Photos of the exterior and interior

Videos or audio recordings of the problem

Information about previous repairs or modifications

Schematics or service documentation when available

Details about the equipment connected before and after the device

Desired final result

Client location and shipping information

After the initial evaluation, I will explain:

Whether the repair or modification appears feasible

Which tests are required

Which parts may need replacement

Any technical or structural limitations

The estimated labour and component costs

Any risks related to previous damage or undocumented modifications

Audio electronics repair is not always predictable.

Some faults are caused by obsolete components, unavailable integrated circuits, damaged circuit boards, incomplete documentation, corrosion, previous incorrect repairs, or multiple interacting problems.

For this reason, I do not promise that every device can be repaired or that every modification is possible.

If a project is not technically reasonable, economically worthwhile, or safe to complete, I will say so clearly. I will not continue replacing parts at random or charge for unnecessary work merely to create the appearance of progress.

After the intervention, the equipment is tested according to the type of device and the work performed.

Testing may include:

Power supply verification

Signal-path testing

Input and output level checks

Frequency-response evaluation

Noise and hum assessment

Dynamic and compression behaviour

Control and switching operation

Extended operational testing

Critical listening tests

Comparison with the original specification when available

The client will receive a clear description of the work performed, replaced components, modifications, remaining limitations, and recommended future maintenance.

Physical repair services are available only after preliminary evaluation.

Shipping, insurance, replacement components, taxes, and customs costs are not included unless specifically stated.

Modifications may alter the original specifications, resale value, manufacturer warranty, or future serviceability of the equipment. Any relevant consequence will be discussed before the work begins.

Devices connected directly to mains voltage require particular attention to electrical safety. I will not perform modifications that compromise protective grounding, insulation, fusing, thermal stability, or other essential safety functions.

Repair and modification costs depend on:

Equipment complexity

Diagnostic time

Circuit accessibility

Availability of documentation

Required components

Previous damage or modifications

Testing requirements

Requested final result