A colotube is an amplifier for life. We therefore grant you a 5-year warranty (excluding the vacuum tubes). Should there be a malfunction in spite of everything, we will pick up the amplifier, repair it, and return to your home in Switzerland at no extra cost. For, we are convinced that our amplifiers are of highest quality.

For the vacuum tubes, we grant you a 1-year or 2000 hours warranty - which ever comes first. The warranty begins on the date of sale and during that time we will replace them for you at no extra cost.

The warranty does not include negligence, accident, or unreasonable use.