LSA VT-70 TUBE INTEGRATED STEREO AMPLIFIER/HEADPHONE AMPLIFIER REVIEW
April 17, 2022 § Leave a comment
To perform my listening tests of the LSA VT-70 Tube Integrated Stereo Amplifier/Headphone Amplifier I used my Audio-gd R2R-1 DAC as source, powered by a Core Power Technologies A/V Equi=Core 1000, and for cabling Cardas Iridium single-ended RCA interconnects, Cardas Iridium power cords, and a Cardas Clear USB cable. LSA recommends letting the amplifier warm up for about half an hour before listening for best results. This may seem like a long time, but truth is solid-state amps can take several days to reach full operating temp, for this reason, the amplifier that is now running my AV system has only been powered off during the last 40 years, for moves, system changes, and power outages. One further step I went through before doing any serious listening was to re-bias the tubes. While strictly not necessary as this was done at the factory, tubes can change over time, and environmental factors, as well as the effects of shipping, can cause this to change. As it turned out, the bias was a little high, not critically so, but worth noting. Due to space considerations, I set up the VT-70 on the far side of my desk facing away from me, so the remote control came in real handy.