ST-85

This compact stereo amplifier utilizes four EL34 vacuum tubes to deliver a stable 60 watts per channel, perfectly capturing the signature “VTL sound” at a highly accessible price point. Built around the EL34 tube—a cornerstone of the classic VTL sound—this amplifier features a compact chassis and a short signal path. These rugged, reliable amplifiers create an exceptionally wide and sweet soundstage when paired with satellite speakers, mini-monitors, or small floor-standing systems. As one reviewer noted: “The sound of brass instruments—especially the trombone—is rich, powerful, and stunning,” adding that it “…made me realize just how brilliant this equipment is at revealing the nuances of music reproduction that matter so much to audiophiles.” We achieved this seemingly contradictory goal through meticulous engineering… making it the “top choice” for audiophiles.
A compact stereo amplifier, ideal for entry-level systems.
Output stage utilizes sweet-sounding EL34 vacuum tubes.
Switchable between tetrode and triode modes.
60 watts per channel in tetrode mode.
30 watts per channel in triode mode.
Features an extruded aluminum front panel with a luxurious, modern aesthetic—available in black or silver.
There is a thick, tinted glass window on the front panel, through which the glow from the lamp can be seen.
Vacuum Tube Complement 4 x EL34, 4 x 12AT7
Output power
20Hz – 20kHz <3% THD
Tetrode: 60 Watts, Triode: 30 Watts
into 5Ω
Class of output operation AB1
Input sensitivity 0.68V @ 60W
Input impedance 100kΩ
Optimum load range 2Ω – 8Ω
S/N ratio -95dB, 120Hz @ 60W
Power consumption Idle = 140W, Full power = 500W
Primary mains fuse rating 100/120V = 6A Ceramic Slo Blo, 220/240V = 3A Ceramic Slo Blo
B+ fuse rating 0.5A fast acting ceramic
Dimensions W x D x H 16 x 12 x 7 inches (40 x 30 x 18 cm)
Weight 45lbs (20.5kg) unpacked, 55lbs (25kg) packed