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Yamamoto Sound Craft " 2A3" single stereo amplifier A-011

Product code: ys-a111-4

Yamamoto Sound Craft " 2A3" single stereo amplifier A-011

Regular price ¥443,000 円
Regular price Sale Price ¥443,000 円
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Attached output pipe
Power supply voltage
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It becomes an order-made product. Delivery time is around 5-6 months.

Voluminous power amplifier.

Best sound quality with direct connection from CD player!

Description

In A-011, the circuit to demonstrate 100% the ability of the 2A3. Equipped with two series input volumes, it is the simplest and highest quality system to directly connect the CD player to achieve the highest quality. The A-011 consists of only one vacuum tube for both driver and output stages, so when you connect the CD player, the sound of the CD is played through only two vacuum tubes.


Improved sound quality by adopting 717A to the driver tube and "80" with good sound in the rectifier tube.

In addition to using regular preamplifiers to control the level of input, you can connect not only CD players but also analog equalizer amplifiers and other input devices if the gain is a little larger.
The 717A,2A3 vacuum tube heater circuit is a DC ignition with double wave rectification to minimize noise, and the rectifier adopts a large-capacity Schottky diode with ultra-low loss from the US International Lecture Fire. The A-011 provides an energetic and powerful sound due to its low impedance It is.

The toroidal power transformer with excellent regulation and the high-beam cut-core output transformer provide excellent sound.
Most of the capacitors, including the power supplies used in the A-011, use specially selected film capacitors to minimize the use of inferior chemical capacitors. The resistors also carefully select high-quality sound parts such as DALE's winding resistance, metal clad resistance, and large-capacity surface mounting resistance. This machine is designed to obtain maximum output 4W at about 0.4V input voltages.

Spec
Format. 2A3 single stereo power amplifier.
Use vacuum tube. 2A3 (without or RCA2A3 included) 2, 717A 2, 80 1.
Maximum output. 4W+4W
Frequency Characteristics. 20-30kHz (at 1W output)
Input sensitivity. 4W output at 0.4V input.
Gain. 24.5dB
Input Volume 100kΩ2 Series A Volume
Input Impedance 100k ohms
Size 400(W)294(D)204(H)mm
Weight 14.3kg

Customer Reviews

Based on 3 reviews
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R
Russel K.
A Really Special Amplifier

This is a really special amplifier to me. I appreciate its purity, clarity, tone and solidity of sound. It sounds pure, vital and natural.

The Yamamoto A-011 2A3 amplifier sounds much more powerful than I expected from an amp outputting 4 watts per channel. In addition it is dead quiet with no hum at all. I also have a Line Magnetic 518IA (22 watts per channel) and Quicksilver Horn Monos (25 watts per channel) and though they have more power, to me the Yamamoto A-011 supersedes them in purity, clarity, solidity of sound and quietness of operation.

The Yamamoto A-011 has a very high quality build and looks and feels beautiful in an understated way.

Out of all my amplifiers I keep returning to listen with my Yamamoto A-011! In my opinion, this amplifier is a gift from the audio gods!

In addition, as an overseas buyer I found the service at ExAudio to be exemplary, with special thanks to Takuhiro Yoshizawa!

For some good tube rolling recommendations check out Glow In The Dark Audio: http://glowinthedarkaudio.***

B
Bruno. P.
Amazing result!

I have an update: after 100/120 h, I replaced the RCA tubes with Shuguang 2A3C (80 USD approx).
Amazing result! Never heard so real and natural.

B
Bruno. P.
really great

It has been working for a week and it is really great.
It probably still needs breaking-2in, however it is already at the level of its 2 wonderful competitors: Ayon Crossfire Mono modified(sort of 300B with doping: 30wpc) and CF Audio 2A3 modified(silver wired and custom transformers. 4wpc).
Kharma Exquisite Mini speakers.