RockridgeSound has introduced the ISR-VT02 iPod dock/music player/AM-FM tuner that relies on a vacuum tube amplifier as opposed to transistors to power its speakers which deliver a softer, richer sound. Based on the old VTS-384 which also had a vacuum amp, the ISR-VT02 is basically a scaled-down version of the older dock. A two-stage 12AX7 (ECC83) amplifier provides each of the two 3.15-inch speak
