Audio’s ultimate tried-and-true technology is decades old, but it’s still going strong thanks to the adoption of new circuit designs.
Vacuum Tube Logic Siegfried Reference Monoblock Amplifier
McIntosh MC275 amplifier
Conrad-Johnson LP66S Amplifier
Audio Research VSi60 Integrated Amplifier
Audio Electronics Inc. Super Amp MkII
JoLida JD 202A integrated Amp
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Vacuum Tube Logic Siegfried Reference Monoblock Amplifier

VTL’s Siegfried Reference Monoblock Amplifier is a statement design with enough statement power capabilities to make Jim Marshall blush (founder of Marshall amplification whose users include Jimi Hendrix, Jimmy Page and Eddie Van Halen). This flagship amp could be the tube world’s only smart amp. With the ability to produce up to 800 watts in tetrode mode into a 4-ohm load, the Siegfried incorporates RS-232 for integration into Crestron and AMX systems, logic-controlled automatic tube biasing, re-biasing, fault sensing with users alerts and automatic shutdown in the event of a tube failure, a soft-start sequence and automate tetrode/triode and phase switchover. The amp produces its power through a single 12AT7 input tube, two 6350 driver tubes and 12 6550C output tubes.

Price: $50,000 per pair

More info: VTL.com

Read more: Tube Amplifiers for Every Budget