We are currently experiencing a 2-3 week factory lead-time. You can place your order online and we will inform you when your unit is ready to ship.
Shinobu Karaki-san's brand-new tube amp is out - the HFSA Power Amplifier, utilizing EL34 valves with an output of 31 Watts per channel.
This is a tube amplifier composed of full-stage vacuum tubes. The input stage uses ECC83 and ECC82 tubes, while the output stage features EL34 push-pull configuration with a Lundahl output transformer and UL connection, delivering 31W + 31W of output power.
The amplifier is housed in a 22mm thick solid maple wood frame, with a 4mm solid aluminum top plate. This design ensures a perfectly rigid body structure with no deflection. The heavyweight transformer and sensitive vacuum tube components are securely supported, enabling the reproduction of substantial mid-low frequencies and delicate high frequencies.
Carefully designed and hand-crafted, this amplifier not only meets the demands of the modern digital high-resolution era but also provides ample functionality and performance for analog playback. Built to last, it is a tube amplifier that will remain unchanged for decades to come.
Features
As a full tube amplifier, this model comes standard with 1 pair RCA and 1 pair balanced XLR balanced inputs, WBT speaker terminals (4-8 Ohm) fitted for spades and banana as well as a bonnet cover.
The components are selected for their high quality and reliability: the resistors are from Vishay, PRP, and Japanese TAKUMAN; the film capacitors are WIMA (Germany), and the electrolytic capacitors are TDK-EPCOS. We ensure that only premium parts are used.
The output transformers come from Lundahl. The power and choke transformers are custom-made in Japan for Aurorasound, while the rectifier diode is a ROHM silicon carbide model, offering the lowest noise and highest voltage capabilities available. All terminals are carefully selected and feature thick-walled gold plating for enhanced performance.
The EL34 tubes operate with a self-biasing system, making maintenance easy. They can be replaced with other EL34 brands without requiring any bias adjustments.
Specifications
- Input: RCA LINE x1, balanced XLR Line x1 - Gain / Input sensitivity: 33dB / 440mV - Input impedance: 24kΩ - Output: 31W +31W @8ohm - Frequency response: 10Hz–30kHz, -3dB - THD+N: 0.1% 1kHz - SNR: 98dB, A-weighted - AC power voltage: Europe/Asia model 240V/230V, USA 120V - Power consumption 200W - Size, Weight: W440 x D290 x H228mm without knobs/terminals, 20kg
