The SR series chassis is 2mm thickness 18-18 stainless steel mirror finished, and the interior installation parts are using 2mm thickness 18-18 stainless steel mirror finish material and 2mm thickness oxygen free copper.The insulator is manufactured from the round bar of 50mm oxygen free copper by scraping and it is attached with the young cow leather between the bottom plate. It is manufactured with the selectedcircuit parts for high quality sound.
It is the series that carefully selected all the parts, further improved the music reproduction faithfully.Chassis has made it possible to use various output tubes by using the adapter plate for the part of the output tube socket, The caliber hole further enhances the heat radiation effect and suppresses the heat inside the chassis.By installing the highest grade Hashimoto transformer, it can play high-quality sound with natural expanding and natural extension of low range. In addition to this, it is using high quality parts suitable for the circuit configuration so as to listen to good music sound even a little.

Vacuum tube	KT88 x4, 12AX7x2, 12AU7x4
Transformer	PT-300x1, HW-60-5x2, C-1-400x1
Output	40W x 40W
UL connect	Self bias
Frequency response	10Hz~70kHz
Residual noise	1mmV or less/1W
Input impedance	100kΩ
Dimensions	W420xH200xD415mm

To the transformer which is the source of sound, Combined tradition and latest technology, it was completed Hashimoto (Sansui Trans) ultimate transformer series for vacuum tube amp. ASTOR is making a tube amplifier by using a matching transformer from among them.

Basically all handmade, so it is also possible to tailor your music preferences, audio system to some extent.