
Callens Audio Labs
Ask me anything
Hi! How can I help?
Ask about our speakers, services, demos, or anything else.
Powered by AI · May make mistakes · Paul is always available
A compact Class A/B power amplifier developed in collaboration with CH Precision, delivering reference-level performance.
The Madison Amplifier was developed through direct engineering collaboration between Wattson and CH Precision. It combines a low-feedback Class A/B linear circuit, a robust regulated external power supply, and a fully symmetrical discrete amplification stage in a compact form. The same bipolar output devices used in CH Precision's M10 Reference Amplifier ensure predictable behavior and harmonic integrity across demanding loudspeaker loads.
CHF 5'590.00. Incl. Swiss VAT. Contact us to order.

Light Gray
Engineered to deliver accurate sound in real rooms, not just anechoic chambers.
Developed with the same engineering team behind CH Precision's reference electronics, using identical bipolar output devices from the M10 Reference Amplifier.
Supports stereo, mono, and bi-amp modes via rear-panel switches, adapting to different loudspeakers and evolving system requirements.
From balanced XLR or single-ended RCA input through to the output stage, the circuit remains fully symmetrical and fully discrete for structural consistency.
Machined from solid aluminum billet for electromagnetic shielding, mechanical rigidity, and thermal stability. Manufactured locally using sustainable practices.
| Type | 2-channel power amplifier |
| Modes | Stereo, monaural, bi-amp |
| Output Power (Stereo) | 2 × 50 W (8 Ω), 2 × 75 W (4 Ω), 2 × 100 W (2 Ω) |
| Output Power (Mono) | 1 × 50 W (8 Ω), 1 × 100 W (4 Ω), 1 × 150 W (2 Ω) |
| Analog Inputs | Balanced XLR, single-ended RCA |
| Input Impedance | 100 kΩ |
| Bandwidth | 1 Hz – 400 kHz (−3 dB) |
| THD+N | < 0.05 % |
| Signal-to-Noise Ratio | > 120 dB (A-weighted) |
| Voltage Gain | +20 dB / +26 dB (switchable) |
| Output Connectors | Spade / Banana sockets |
| Power Supply | External 36 V DC, 350 W |
| Power Consumption | < 0.5 W standby, 20 W idle, 450 W max |
| Dimensions (W × D × H) | 216 × 300 × 87 mm |
| Weight | 6.0 kg |
| Color Options | Light Gray, Dark Gray |
| Design & Manufacture | Switzerland |