Skip to product information
1 of 6

ASTOR AST-6SN7 Vacuum Tube Stereo PP Power Amplifier

Product code:

ASTOR AST-6SN7 Vacuum Tube Stereo PP Power Amplifier

Regular price $1,866.00 USD
Regular price Sale price $1,866.00 USD
Sale Sold out
Tax included. Shipping calculated at checkout.
Chassis type
Supply voltage
View full details
If not in stock, will be made to order, delivery time will be about 3~4 weeks.

Authentic sound without compromise

Faithful reproduction of the original sound source


ASTOR, a manufacturer of vacuum tube amplifiers, is developing a new series of amplifiers that are lighter and easier to handle without sacrificing sound quality by reducing the width and size of the amplifiers from its previous lineup of full-size, bulky, and heavy amplifiers.

The AST-6SN7 push-pull style power amplifier is available in two chassis options: stainless steel or aluminum. The original internal component mounting fittings are produced and machined into a two-stage structure to suppress resonance and improve sound quality. The anodized aluminum front panel, made of 10mm-thick 52S aluminum alloy, and the knobs for the VR also create a fascinating appearance that accentuates the shiny vacuum tubes.

The output tubes are equipped with a self-bias function, so they can be easily replaced with compatible bulbs for your enjoyment. The self-bias capacitor used in the AST-6SN7 has a large capacitance of 470 microns, whereas most amps in the same price range use a capacitor of around 100 microns.This allows a margin of current capacitance, which results in performance comparable to a fixed bias.This allows the sound to be well represented even when the volume is turned down. Since it has independent left and right volume controls, you can easily enjoy high-quality tube music by connecting it directly to a CD player, smartphone, tablet, etc. without a preamplifier.

The transformer uses an original transformer that keeps the price low while delivering sound quality as good as that of higher grade transformers. The legs are made of a combination of aluminum and rubber materials. Circuit parts and chassis mounting parts are also made of carefully selected materials to pursue high sound quality,

The two-stage internal structure prevents resonance from both inside and outside, contributing to a high sound quality with transparency and no distortion.

Tubes used 6SN7×2, 12AU7×2, 12AX7×1
Transformer used AST-70PK, TOR-5PP, ST-1.5--200M
Output 1.8W x 1.8W, self-biased
Frequency Response 10Hz~50KHz
Residual Noise Less than 1mmV/1W
Distortion 0.27%/1W
Input impedance
Size W270 x H150 x D300mm(Protrusions not included)
Weight 6.9kg(Stainless steel type)4.3kg(Aluminum type)