The KSL-M7 Preamplifier The Kondo designed KSL-M7 preamps, represent the embodiment of the Audio Note Japan's design philosophy. The majority of the parts are Kondo designed and many, like the wire and coupling capacitors are hand made in Audio Note Japan's factory. Kondo's hand made silver-foil capacitors and braided silver ground wire. The pre-amp uses a 6X4 rectifier tube 5751 x 2 for Phono and 5687 x 2 for line stage. The output impedance of the KSL-M7 preamps are at approximately 600 Ohms, no feedback in linestage and Negative Feedback is employed only in equaliser section. The KSL-M7 can be ordered in the following versions: 1. Line and Phono full function preamplifier; 2. Line only; or 3. Phono only (for M7)