Helikon SL The Helikon SL is a special low-output version of the regular Lyra Helikon. It is exclusively intended for use with phono preamplifiers with particularly high gain and low noise. Like the regular Helikon it is a medium-weight, medium-compliance cartridge, and was designed for use with high-quality tonearms The tonearm output cables should be connected to a dedicated phono preamplifier or phono input on a preamplifier designed for direct use by a low-output MC cartridge (0.22mV output voltage or less). Mono low output 0.22mV boron cantilever aircraft-grade alloy body Exchange with any Lyra Cartridge manufacturer's website