Phasemation EA-550 Phono Amplifier

Description

Phasemation EA-550 Phono Amplifier

A separate type phono amplifier (2 units), all discreet, all-stage symmetric non-feedback circuit that draws out the music’s reality and the artist’s passion.

Product Outline and Concept

Having in mind that “analogs too have a lot more to go,” we expanded the product line-up of EA-1000, EA-500, EA-350, EA-300, EA-200 and phono amplifiers due to a non-feedback for lovers of analog discs.

This time, any small inexactness were eliminated as a compilation of semiconductor phono amplifiers, and the built-in MC transformer was newly designed with a special split winding structure that uses a high pure copper wire PC-TripleC as the secondary winding material.

The EA-550 will be released to experience a new level of sound along with a refinement on the circuit.

Phasemation EA-550 Owner’s Manual

Received Prizes

Ongen Publishing Audio Excellence Award 2020 Gold Award
Ongen Publishing Audio Excellence Award 2020 Silver Award
SEIBUNDO SHINKOSHA Publishing MJ Technology of the Year 2019 Honorable Mention
ONGAKU NO TOMO SHA CORP. “STEREO” magazine Best Buy Components 2020 Phono Equalizer over ¥500,000 3rd Place

Main Features

Adopted a strong chassis structure of a 2 unit box with Lch and Rch being independent and completely monaural.

Following the elegant design of CA-1000 / T-2000, a strong housing structure consisting of a 10mm thick aluminum slant front panel, a 1.6mm thick copper plated steel chassis base and a 1.6mm thick copper plated steel sheet cover was adopted and this ensures rigidity and reduces magnetic deformation.

A heavy weight metal insulator that blocks external vibrations is used for the feet.

In addition, the played sound supported by the left and right divided equalizer part and the powerful power supply part has high S/N and high resolution.

The played sound can be enjoyed with overwhelming realism and with a panoramic stage.

V-I / I-V conversion type all-stage symmetrical non-feedback amplifying circuit due to all discreet parts.

The negative feedback amplifier which is the mainstream of modern amplifiers constantly compares the input and output signals for both the semiconductor and vacuum tube and this difference (amended signals) can be amplified with high precision at low cost because it is amplified as an input signal. However, there is a time delay between the input and output signals which cannot be solved theoretically and this generates a TIM distortion and the like and this is a big reason why sound satisfaction cannot be attained from negative feedback amplifiers.

At Phasemation, amplifiers of semiconductors and vacuum tubes are all composed of non-feedback amplifiers. For non-feedback amplifiers, there are no amending operations like the negative feedback amplifiers and therefore high precision/technology of structured parts and circuits are required.

As a result, it is played with no information remains on the sound source (record) and in terms of sound quality, it can play the music with excellent inspiration, dynamics, and shadowed (or the like) expressions.

Prolific Features

1. Three input terminals are equipped and MM/MC switching is possible for each. In addition, inputs 1 and 2 support balanced inputs due to the XLR connector.
2. A 2nd order CR type low cut filter with non-feedback is equipped.

Plays warped phonograph records without any music deterioration and prevents the speakers (woofers) from shaking.

3. Three types of playing curve changeover switches are equipped.

For the equalizer characteristics, along with the RIAA characteristics for the previous stereo, Mono1 (used on the DECCA label and so forth) and Mono2 (used on the Colombia label and so forth) are equipped as a particular characteristic for a monaural. This will allow higher fidelity playback than the DECCA and Columbia labels.

4. A “degaussed” circuit is equipped.

By choosing “degauss” with the functions and playing the record for about 30 seconds, the MC cartridge with a metal core that was magnetized is degaussed and the sound quality becomes clear.

Adoption of High-Quality Parts

On the Signals:

• 1% grade metal film resistors and Micar capacitors with silvered Micar plates for dielectrics on RIAA elements.
• ELNA’s SILMIC audio grade electrolytic capacitors and 1% grade metal film resistors used.

On the Power Circuits:

• Rohm’s SiC diodes for minimal switching noise.
• High-rank audio-grade metal plated capacitors from Nichicon and ELNA’s SILMIC II.
• Low noise zener diodes combined with shunt regulators for a fast and low noise power circuit.
• R-core transformers for positive and negative power supplies to eliminate common impedance effects.