Carl Martin Guitar Effects, Guitar Amplifiers, Bass Amplifiers Strings & Accessories from Denmark.
ESR was founded in 1990 as a professional PA sound rental company. Shortly after they began producing custom made audio equipment.
Their goal was, from the very beginning to develop and produce products for the demanding professional musician, with a superior sound quality and features not seen on any other guitar effect pedal.
Due to their extensive knowledge of the professional music industry, and their ...contacts with a wide range of demanding musicians, they have been able to maintain a high quality of products and now have a range of 28 high quality guitar effect pedals, with more to come in the future.
In 2005 Carl Martin released their first point point handmade tube amplifier the Custom Shop 50, the line now includes heads,- caps as well as a bass system.