Product Summary:The Phasemation EA-200 Phono Preamplifier is their least expensive model. Designed to be the biggest bang-for-the-buck.... Click To Read More
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Phasemation – EA-200 Phono Preamplifier
The Phasemation EA-200 Phono Preamplifier is their least expensive model. Designed to be the biggest bang-for-the-buck.
The Phasemation EA-200 builds on the original EA-5 model. The sound quality was improved further by refining the circuits, upgrading the power supply, and creating a new sophisticated design of the exterior.
The design is a class A circuit with zero-feedback, and using all discrete parts. Amplifying with zero-feedback increases the cost but the results are spectacular. A load feedback amplifier compares the input and output signals and the difference (supplement signal) is amplified as an input signal which makes it possible for amplification at a low cost. However, a zero-feedback circuit amplifies the input signal itself, which makes a big difference. In terms of sound quality, with music impression, dynamics, and shading expressions, there’s no substitute for zero-feedback, so all Phasemation phono preamplifiers use this approach.
High Gm FETs (field-effect transistor) are used to create a voltage-current converter with extremely low noise. Then, the stable RIAA equalizer circuit has excellent transient response characteristics. For the output buffer, an inverted Darlington circuit is adopted to ensure a high input impedance and low output impedance, which strongly drives the device in the next circuit.
a) Solid chassis structure
A phono signal is weak by nature, so care must be taken to ensure it’s not influenced by outside signals. The chassis base and top cover are made from a 1.6 mm steel plate, and copper coated. A small chassis size allows for a reduction of magnetic distortion that maintains high strength and rigidity.
b) Dual mono circuitry
1) A dual monaural circuit actualizes a uniformity of the left and right channels at a high level. A high-performing power supply provides power without any common power impedances due to left/right individual powers and accomplishes channel separation of 90dB or more (20Hz to 20kHz).
Introduction of High-Quality Parts
The following evaluated high sound quality parts and so on are used for the RIAA impedance elements and the power supply, which strongly influence phono sound quality.
1) Metal film resistors with some margin of the rated value
2) High-quality film capacitor
3) Fast recovery diodes
4) Low noise Zener diodes
BEST BUY COMPONENTS 2013-14 Phono Equalizer Amplifier 3rd Prize
Audio Excellence Award 2013 Bronz Prize
analog Grand Prix 2014 Gold Award
2013 MJ Technology of the Year Analog Components Excellent award
|Form :||MM/MC Non-Feedback Type Equalizer Amp|
|Input Sensitivity :||2.5 mV||0.12mV|
|Input Impedance :||47k ohm||470 ohm|
|Gain :||38 dB||63 dB|
|Input Equivalent S/N ratio :||–124dbV||–140dBV|
|Maximum Allowed Input :||90mV||4mV|
|Rated Output Voltage :||200mV (1kHz)|
|Rear Curve Deviation :||±0.3dB (20Hz to 20kHz)|
|Output Impedance :||250 ohm|
|Channel Separation :||90dB or more (20Hz to 20kHz for MM or MC)|
|Power Consumption :||2W (115 or 220 VAC, 50/60 Hz)|
|Input/Output Terminals :||Machined gold-plated terminal|
|External Measurements (mm) :||220 (width) x 57 (height) x 228 (depth) with terminals|