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TO-6550FC Push-Pull Power amp

Product code: TO-FU-1

ASTOR TO-6550FC Push-Pull Power amp

Regular price ¥459,200 円
Regular price Sale price ¥459,200 円
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Supply voltage
front panel
Attached output tube
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The product will be made to order. It takes about one month for delivery depending on the availability of parts.
The delivery date may vary depending on the manufacturer's order status.

More than twice the value of the price!

Faithfully reproduces the original sound source


Astro Denshi Kikaku's products have a beautiful appearance made of vacuum tubes and metal processing, and a rich amount of information and high purity sound quality to faithfully reproduce the original sound source. Carefully selected materials are carefully crafted one by one by skilled artisans. The internal parts of the amplifier are carefully selected and manufactured by the same skilled craftsmen as for high-end models, resulting in an amplifier that produces high-quality music reproduction similar to that of high-end models.

TO-6550FC is a push-pull type power amplifier, an Astro Denshi amplifier with enough power for your needs.
The TO-FC series is available with either four or six amplification tubes. The model with 4 amplification tubes uses a single driver for the second stage, split into left and right. The six-tube model uses a single driver on each side of the second stage in parallel to provide a margin of voltage.
The output tubes are equipped with a self-bias function, so they can be easily replaced with compatible bulbs. The self-bias capacitor used by the company is an order of magnitude larger than the 200~300 micro capacitors used by most manufacturers, but Astro Denshi Kikaku uses an 8000 micro capacitor. This allows the sound to be expressed well even when the volume is turned down.
The independent left and right volume controls allow for direct connection of a CD player, etc., and fine volume adjustment for enjoyment.

The chassis of the TO series is made of 2mm-thick aluminum, anodized in champagne cold silver. The TO series chassis is made of 2mm-thick aluminum material anodized in champagne cold or silver color, and 2mm-thick 52S alloy aluminum material is used for the component mounting material. Insulators are also made of a combination of aluminum and rubber materials. Circuit components and chassis mounting parts are also carefully selected for high sound quality. The internal structure is two-stage to achieve even higher sound quality.
Tubes used 6550 x4, 12AX7 x2, 12AU7 x2
Transformer used PT-270x1, HW-40-8x2, H-1826x1
Output 30W + 30W
UL Connection Self-bias
Frequency Response 10Hz~60kHz
Residual Noise Less than 1mmV
Input impedance 100kΩ
Size W390 x H180 x D300mm
Weight 15.8kg

*Please note that the product is made to order and it may take about one month for delivery.
Output tube can be selected from KT88, KT120, and 6550.