dodgealum Look up Radu Tarta he is considered one of the very best Vacuum tube engineers in North America 40 years in the trade.he builds only no compromise DHT Preamplifiers most name brands as I stated many times being a ex audio dealer only 25% goes into the electronics ,the rest R&D overhead and markup with these custom
builds it’s like building a Bentley to whatever standard of parts quality you want . My friend has one of his deluxe 2 box DHT preamps for sale like New ,retail this would be well over $15k only 2 years old Like New.