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SE-KT88XL Vacuum Tube Push Pull Power Amplifier

Product code: SE-XL-1

Astro SE-KT88XL Vacuum Tube Push Pull Power Amplifier

Regular price ¥557,760 円
Regular price Sale price ¥557,760 円
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Supply voltage
front panel
Attached output tube
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Please note that this product will incur shipping charges regardless of the purchase price.
This product is made to order. Delivery time will take about 2 to 3 months depending on the availability of parts.
You can choose from KT88 or 6550.
Delivery time may vary depending on the manufacturer's order status.

Amplifier with rich musicality

Original transformer provides performance beyond its price


The chassis of the SE-KT88XL is made of the same folded stainless steel 2mm thick mirror finish used in the high-end AS series, and the panel is made of 52S duralumin 10mm thick panel with an anodized finish. This robust and beautiful mirror-finished casing alone cost nearly 200,000 yen, but it is remarkably effective in anti-vibration and anti-noise measures. The heat dissipation is also very good, so even though it is a vacuum tube amplifier, there is no problem at all even after long hours of use. The insulator is also made by machining from a 40mm 52S round bar and inserting young cowhide between the insulator and the chassis, which also provides anti-vibration effect. The circuit parts are manufactured using carefully selected parts that are good for sound quality. The extremely high mounting precision of the vacuum tubes, the artistic aerial wiring that minimizes noise generated from the tube mounting area, and Astro Denshi's unique manufacturing technology have contributed greatly to the clear and transparent high sound quality without noise and turbidity, and the faithful reproduction of the original sound without any unnecessary decoration. The original sound is reproduced faithfully without any unnecessary embellishments.

The SE-KT88XL features a transformer that is not the Hashimoto transformer used in many of the company's amplifiers, but rather an Astro Denshi original transformer designed by Astro Denshi and manufactured by Kanno Denki on consignment in order to achieve better sound. This transformer is not a Hashimoto transformer, but an Astro Denshi original transformer designed by Astro Denshi and manufactured by Kanno Denki on behalf of Astro Denshi for better sound. The band-type output for 60W is used to produce 55W x 55W output with fixed bias. By using fixed bias, the same output has a significantly greater sense of power than self-bias, and the sound is well expressed even when the volume is turned down.

The power transformer is large enough to handle the B-voltage and B-current, which gives the power supply more margin. The output transformer uses a 60W load resistor of 8kΩ to reproduce a relaxed low frequency range and extended mid-high frequency range, resulting in an amplifier with rich musicality.
Tubes used KT88 x4, 12AX7 x2, 12AU7 x4
Transformer used TRX-300M x1, FPO-60W-8x2, LC-2-300M x1
Output 55W x 55W
Bias Fixed bias
Frequency Response 10Hz~60kHz
Residual Noise Less than 1mmV/1W
Distortion 0.039%/1W
Input impedance 100kΩ
Speaker 4Ω, 8Ω
Size W460 x H200 x D400mm
Weight Approx. 24kg
Power source 100V/50,60Hz