Allnic Audio L-7000 Rør ForforstærkerImmerse yourself in the original recorded space. The L 7000 is a single gain stage, transformer coupled, remote controlled line stage pre amplifier. It uses the DHT 300B as a voltage regulator. DHT 300B as a series voltage regulator Single gain stage True Dual Mono design The 300B has justly won the reputation for being a superb output tube in single ended amplifiers. But it will take some rethinking to imagine this great tube in a non audio role. The