ASTOR
AS-350BsLC Tube Single power amplifier

The chassis of the AS-350BsLC is made of 2mm-thick 18-18 stainless steel with a mirror finish, and the internal mounting parts are made of 2mm-thick 18-18 stainless steel with a mirror finish and 2mm-thick oxygen-free copper material. This robust and beautiful mirror-finished casing alone cost nearly 200,000 yen, but it is remarkably effective in anti-vibration and noise reduction. The heat dissipation is also very good, so even though it is a vacuum tube amplifier, it can be used for a long time without any problem at all. The insulator is made of oxygen-free round copper rod and attached with young cowhide leather.

The circuit parts are manufactured using carefully selected parts that are good for sound quality. The vacuum tubes are mounted with extremely high precision, and noise generated from the vacuum tube mounting area is minimized as much as possible.

This unique manufacturing process technology of Astro-Denshi has greatly contributed to reproduce the original sound faithfully with high sound quality of clear and transparent without noise and turbidity, and without unnecessary decoration. The AS-350BsLC is designed to reproduce the original sound with a thicker sound by using a choke coil while maintaining the delicate, detailed and highly transparent expression of the single stage. The final stage transformer uses a custom-made Hashimoto driver transformer designed by the company, and a power transformer for 20W is used.

Tubes used	350B x2, 5U4G x1
Transformer used	PT-270 x1, H20-7U x2, C-16-150W x1, C30-80W x2, H-2307 x2
Outputs	3W x 3W
Bias	Output choke coil cathode biased
Frequency Response	10Hz~50kHz
Residual Noise	Less than 1mmV/1W
Distortion	0.045%/1W
Input impedance	100kΩ
Speaker	4Ω, 8Ω
Size	W420 x H210 x D400mm
Weight	28kg