VTL

S-400 Series II Reference Stereo Amplifier

$48,900.00
  • S-400 Series II Reference Stereo Amplifier
S-400 Series II Reference Stereo Amplifier S-400 Series II Reference Stereo Amplifier S-400 Series II Reference Stereo Amplifier

VTL

S-400 Series II Reference Stereo Amplifier

$48,900.00

Description

Since its introduction in 2004, VTL’s S-400 Stereo Reference amplifier has been valued by music lovers around the world as a high power, high performance tube amplifier–renowned for its ease of use and refined, natural depiction of music. The new Series II version of the S-400 uses the same circuitry as its bigger brother, the Siegfried Series II Reference monoblock amplifier, in an impressive single chassis design. The inclusion of VTL’s latest engineering advances brings the renowned sonic performance of the S-400 to even greater heights.

 

For the Series II, VTL, has completely re-worked the entire signal path. Upgrades include a fully balanced differential input stage driving a differential phase splitter and a lower impedance push-pull output stage with a dramatically improved, fully balanced and enhanced interleaved and coupled output transformer. Equipped with the same “SmartTube” technology as the Siegfried II, the S-400 deploys Auto Bias and Fault Sensing, precision-regulated power supply technology, and bi-directional RS-232 control, giving unparalleled flexibility and ease of use.

The S-400 Series II gains further sonic benefits with a shorter, faster and fully balanced negative feedback loop, with zero global negative feedback. The negative feedback loop completely eliminates ringing and requires no capacitor compensation to maintain critical phase integrity and information. The result is an amplifier that remains stable even under the most demanding loads.

Specifications and Features:

  • Vacuum Tube Complement: 12 x 6550 or KT-88, 2 x 12AT7, 2 x 12BH7
  • Output Power:
    • Tetrode = 300 watts
    • Triode = 150 Watts
  • 20Hz ‐ 20kHz <3.5% THD:  Into 5 ohms
  • Input Sensitivity: Variable between 1 – 2V, depending upon DF setting
  • Input Impedance: 48K Ohms
  • Load setting: 5 ohms
  • Optimum Load Range: 4 - 8 ohms
  • S/N Ratio: -90dB, 120Hz
  • Power Consumption:
    • Idle = 560 W
    • Full Power = 1600 W
  • B+ fuse ratings: 100/120V = 20A Ceramic Slo Blo, 220/240V = 10A Ceramic Slo Blo
  • Logic fuse: 100/120V = 1A Ceramic Slo Blo, 220/240V = 1A Ceramic Slo Blo
  • Input fuse: 100/120V = 2A Ceramic Slo Blo, 220/240V = 1A Ceramic Slo Blo
  • Filament fuse: 100/120V = 2A Ceramic Slo Blo, 220/240V = 1A Ceramic Slo Blo
  • Secondary fuse rating: Plate 2.5A Fast acting 600V, Screen 0.75A Fast acting 600V
  • Dimensions W x D x H: 11.5 x 24 x 24 inches (29 x 61 x 61 cm)
  • Weight: Net: 250lbs (113Kg), 350lbs (159Kg)