SP14 Tube Preamplifier Kit is said to have an awful hum. Let's see what gives.

This was a kit built by the owner. You can buy these kits online for about $1000 and assemble it yourself. It's supposed to be ultra high-end. As with any kit, You never know what you'll find "under the hood"... but minor mistakes can lead to BIG noise.

Видео SP14 Tube Preamplifier Kit is said to have an awful hum. Let's see what gives. канала DeadKoby