Ground loops can turn your pristine audio setup into a symphony of unwanted hums and buzzes, but the Palmer wupper Line Isolation Box cuts through the noise to restore crystal-clear sound. This robust isolation transformer, housed in durable aluminium and steel construction, effectively separates ground potentials between connected devices to eliminate equalising currents that cause interference. The result is pure, unaltered audio transmission without the electrical gremlins that plague complex setups.
Originally designed for guitar and bass applications, the Palmer wupper’s exceptional sonic transparency makes it equally suited to keyboards and hi-fi equipment. Its jack inputs and outputs accommodate both balanced and unbalanced connections, with the added benefit of converting unbalanced signals to balanced for extended cable runs without signal degradation. The passive design means no batteries or phantom power required, making it virtually bulletproof in terms of reliability.
Installation couldn’t be more straightforward – simply connect the wupper between problematic devices and watch the interference disappear. This no-nonsense approach to solving ground loop issues proves that sometimes the most effective solutions are also the simplest ones.
- Line isolation for guitar/bass/keyboard; also suitable for HiFis and car stereos
- Single channel: Jack input and -output
- Reliably eliminates ground loop hum and interfering signals
- Galvanic transformer isolation
- Can be used to balance signals
- Pure and unaltered sound
- Passive operation: simple and failure-proof
- Distortion-free up to +6 dBu
- Solid casing made of aluminium and steel
- Incl. rewritable tour label for attachment onto the back of the wupper
- Engineered in Germany
- Width: 50 mm
- Depth: 50 mm
- Height: 110 mm
- Weight: 0.3 kg



