A milestone in stretching the borders of analog audio technology was the invention of the 120V audio rail technology. SPL's SUPRA op amps were the first to operate on this extremely high voltage. Common still today is a 30V rail and in better devices 48V to 60V rail. SPL is the only manufacturer offering audio processors operating on a 120V rail setting new benchmarks for analog op amps. The SUPRA op amps offers a signal-to-noise ratio of 116dB with an additional headroom of 34dB giving a dynamic range of 150dB...
SPL was founded in 1984 and started as a typical garage company in the Rhineland area in Germany. SPL founder Wolfgang Neumann previously owned one of the first 24 track recording studios in nearby Roermond, a dutch city close to the German border. Engineering and producing brought up ideas for new product designs which led to the founding of SPL...
SPL is a German manufacturer of analog and digital audio processors for professionals and consumers.