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Phasemation MA-2000 Monaural Power Amplifier
36.000,00 €
The excellence of Japanese craftsmanship shines in the Phasemation MA-2000. This is a high-end monaural power amplifier featuring 300B tubes in a parallel single-ended Class-A design.
Delivering over 25W of power, it uses SOVTEK 2A3 tubes for optimal synergy with the 300Bs. With LUNDAHL transformers, independent power supplies, and a zero-feedback triode tube architecture, it offers dynamic, expressive sound and great noise reduction. This amplifier doesn’t just play music; it breathes life into every note, making it an essential choice for discerning audiophiles.
Available on backorder
Description
300B Parallel Single-ended Tube Monaural Power Amplifier which can educe the music reality and even the artist’s passion
Phasemation MA-2000 Monaural Power Amplifier
In the world of audio amplifiers, the wide kinds of semiconductor amplifiers, tube amplifiers, etc. are released. Therefore, the respective audio features can be enjoyed as a hobby. Especially tube power amplifiers adopting a tube called ‘fine tube’ such as 2A3 or 300B have well-established sound quality that cannot be expressed by semiconductor amplifiers and they are accepted consistently even in the modern era.
“We would like to taste the best sound produced by a 300B amplifier composed by a parallel single-ended circuit adopting 300B which is the best tube among them and a circuit strongly driven by a transformer-coupled circuit adopting 2A3.” In 2016, we have developed the monaural power amplifier, MA-2000, to respond to the user’s thoughts.
Phasemation MA-2000 Owner’s Manual
Received Prizes
Stereo Sound Publishing Stereo Sound Grand Prix 2016 | |
Ongen Publishing Audio Excellence Award 2017 Silver Award | |
Ongen Publishing analog Grand Prix 2017 Power Amplifier Product Award | |
ONGAKU NO TOMO SHA CORP. STEREO magazine Power amplifier equipment 1st | |
SEIBUNDO SHINKOSHA Publishing MJ Technology of the Year 2016 Tube amplifier equipment Excellence Award |
Main Features
300B Parallel Single-Ended Stage for Fixed-Bias Single Pure Class-A Operation
In order to compose the single pure class-A circuit so that the innate goodness of 300B is expressed with the simplest operation, two fixed bias power supplies are allocated individually for the ended-tube of PSVANE WE300B and therefore the setup of the optimum operating point and stable operation are secured. Consequently, this strong power greater than 25W outputted by a parallel operation can be supplied for driving a speaker. By adding the power supply system having a timer control (for 1 minute) at the time of turning the power supply on, the operation with further high reliability is achieved.
SOVTEK 2A3 for the Transformer-Coupled Circuit Driving PSVANE WE300B Ended-Tube Optimally
We utilize 2A3 which is well-established even as an ended tube for a transformer-coupled circuit to drive the ended tube 300B, set 2A3 to the optimum operating point, and secure the DC stability by supplying the individual fixed bias to 300B parallel circuits. Therefore, the speaker is driven with unshakable stability.
Composing the Non-Feedback Amplifier by Adopting Triode Tubes in All Stages
We compose the non-feedback amplifier by adopting triode tubes, 12AX7SRPP+2A3+300B, in all stages. Therefore, the ability for reproducing dynamic and very expressive music is provided only possible from the non-feedback circuit.
Adopting the Output Transformer and Inter-Stage Transformer Made by LUNDAHL in Sweden
Because the inter-stage and output transformers made by LUNDAHL in Sweden are proper to compose this equipment and suited for the sound quality to be aimed by us, we have adopted them. The fixed bias circuits are allocated individually for the ended-tube of 300B with utilizing the independent winding structure at the secondary side of the inter-stage transformer and therefore the setup of the optimum operating point and stable operation are secured by reading the meter directly. The independent terminals able to drive an 8 or 4 ohm speaker are provided by utilizing the independent winding structure at the secondary side of the output transformer.
Composed of Two Independent Power Choke Transformers
Because the power supplies from the independent power choke transformer are individually supplied for the driver stage (2A3) and power stage (300B parallel single-ended), the mutual interference between the input signal amplifier circuit and the speaker drive circuit is purged. Therefore, signals of various levels from infinitesimal signals to high power signals are amplified clearly.
Thoroughgoing Design for Decreasing the Noise
We have adopted the thoroughgoing design for decreasing the noise as follows:
- Rectifier tube 5R4G which does not generate a switching noise in principle against a high voltage power supply
- Rectifier circuits composing of choke transformers
- DC ignition for heaters driven by complete DC power supplies for all tubes.
Timer Indicator and Appearance
The color of the timer indicator is red at the time of standby and changes to blue after 1 minute as a starting time. In addition, the impressive front glass with placing the two-color LED indicator on the front panel is designed as a stately appearance.
MA-2000 Block diagram
Specifications
Product | 300B Parallel Single-ended Monaural Power Amplifier |
Input impedance | 47k ohms |
Gain | 27dB |
Residual noise | 200µV or less: A-NET |
Rated output | 25W (THD: 5%) |
Frequency characteristics | 10Hz to 40kHz (+0,–3dB) |
Output impedance | 4 ohms, 8 ohms |
Power consumption | 160W(230VAC, 50 to 60Hz) |
Input/Output terminals | Terminals made by FURUTECH CO.,LTD. |
External dimensions (mm) | 270(W) x 245(H) x 433(D) |
Weight | 20kg |
Accessories | AC power cable |
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