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Power amplifier

The true ability can authentically drive speakers - real Masterwork of amplifier - the RE - the starting point of PHASS

    Two types amplifier circuits are available in RE series,


    *RE 2, RE 2.2, RE 50, RE 50 HI and RE 100M - “Standard Push pull” amplifier


    *RE 2.65 and RE 4.25 - “Single End Push Pull” amplifier

  • RCA input type

    RE 2.2

    RE 2.2 specification

    Output power: 2x40W  / Input sensitivity : 0.25V  / Input impedance : 10 K ohm / Load impedance : 4-16 ohm /  Consumption current : Idling time (no signal) - 3A, Remote off time : 2mA  / Size (mm) :320(W)x92(H)x504(D)  

    RE 2.2 / 2ch amplifier ( RCA input )

    RE 2.2 is one of our top grade model in the RE amplifiers. It has been constructed by our originally developed transformers and audio grade electric parts without any compromises. It achieves a great ability that can fully control speakers and it realizes a exceptional reproduction of nature sound music.

    RE 50

    RE 50 specification

    Max output power:50W x 2(1 KHz/10 ohm,RMS)•input sensitivity:0.25V•Load Impedance:4~16 ohm•Consumption current:at ldling (ON,no-signal) - 3A/at Rrmote Off - 2mA•Size(mm):280(W)X74(H)X320(D)

    RE 50 is the highest grade small transistor amplifier succeeded in a circuit layout of Vacuum Tube amplifiers.It has the same concept of the constant current driving can realize the highest drivability.The 'organic' sound reproduced by RE 50 - be able to convey the heart of the mysician as if the music was being performed in front of one's eyes.It is a real high end and entry model of PHASS RE series amplifiers whick can perform high musicality.

    RE 4.25

    RE 4.25 specification

    Max output power:50W x 2(1 KHz/10 ohm,RMS)•input sensitivity:0.25V•Load Impedance:4~6 ohm•Consumption current:at ldling (ON,no-signal) - 3A/at Rrmote Off - 2mA•Size(mm):280(W)X74(H)X320(D)

    RE 4.25 - 4 channel amplifier (RCA input)

    RE 4.25 is a Single End Push Pull amplifier. Its NON-NFB circuit produces appropriate output power suitable for delivering electric current into speakers with quite low noise, allowing the amplifier to easily control speakers and produce vivid sound. Our sound design concept can places RE 4.25 on the highest class of SEPP amplifiers as well.

    RE 100M

    RE 100M / monaural power amplifier (RCA input)

    RE 100M is the highest grade small sized transistor monaural power amplifier succeeded in a circuit layout of Vacuum Tube amplifier. It has the same concept of the constant current driving can realize the highest drivability. Its pure organic sound reproduced by RE 100M will be able to convey the heart of musicians as if the music is being performed in front of one’s eyes. RE 100M can output real strong power (1x100W at 1 KHz/10 ohm, RMS) will be able to perform great musical sound.

  • Balance input type

    RE 2

    maximum power output:40W x 2(1 KHz / 10 ohm,RMS)input sensitivityinput impedance10 K ohm):RCA / -10 dBV(0.3 V)Balance/ -18 dBV(0.13 V)Max input level:RCA / +18 dBV(8 V)Balance/ +10 dBV(3.2 V)RE 2 Balance input  by BLD ( Balance Line Driver )

    RE 2 - 2 channel amplifier ( Balance / RCA input )

    The RE 2 amplifier, which has easily surpassed sound quality of home audio amplifiers, is now equipped with a balanced line input stage, resulting in further improved sound quality.
    When the signal form the source unit is transmitted to the RE 2, it is converted to a balanced signal by a BLD (Balanced line driver) at the input of the RE 2. This pure signal is then transmitted by the constant current driving of RE 2 to the connected speakers.
    The balanced line input stage of RE 2 takes music reproduction to a higher place.

    Max output power:40Wx2 (RMS, 1KHz,10ohm) / Input sensitivity(10 K ohm): RCA -10dBV(0.3V), Balance -18dBV(0.13V) / Max input level: RCA +8dBV(8V), Balance +10dBV(3.2V) / Load impedance: 4-16ohm / Consumption current: Idling time (no signal) 3A, Remote off time: 2mA / Size(mm): 320(W)x92(H)x504(D)

    RE 2.65

    RE 2.65 and BLD balance line drive configuration

    RE 2.65 - 2 channel amplifier ( Balance / RCA input )

    We set out to create a SEPP amplifier that would be a part of our RE Series and offer such excellent sound quality that it would not bring dishonor to the Phass RE name and reputation. We accomplished our objective and proudly offer the RE 2.65 as the secondary SEPP based RE Series amplifier. NON-NFB circuit produces appropriate output power suitable for delivering electric current to speakers with quite low noise, allowing the amplifier to easily control speakers and produce vivid sound. Our sound design concept places RE 2.65 on the extremity of SEPP amplifiers.

    Max output power:65Wx2 (RMS, 1KHz, 8ohm) / Input sensitivity(10 K ohm): RCA 1.6V / Consumption current: Idle time (no signal) 1A, Remote off time: 2mA / Size(mm): 250(W)x56(H)x326(D)

    RE 50HI

    Basic configuration of RE 50HI

    RE 50HI / 2ch amplifier ( Speaker signal input )

    RE 50HI is a power amplifier which has a high input (speaker signal input) stage without a RCA signal input stage. It can transmit the music signal which was outputted from another power amplifier to the connected speakers simply as the constant current driving amplifier. The speaker signal means that it is the balance transmission signal, and its signal can be transmitted to RE 50HI without getting any disturbances and noises. Accordingly RE 50HI which can be inputted such clean balance signal can perform great and coherent sound impressively.

    Output power: 2x50W  / Input sensitivity : 5V  / Load impedance : 4-16 ohm /  Consumption current : Idling time (no signal) - 3A, Remote off time : 2mA  / Size (mm) :280(W)x74(H)x320(D)

  • Features of Pl series
    In the transition to hydroelectric vehicles, it is a remarkable amp that meets all requirements and satisfies users beyond their demand.
    It contains high sound quality of AB Class as well as efficiency of electrical use of D Class. It offers line arrangement for easy equipment and compact size that saves place for storage.
    Using the core IC from circuit of Home HiFI, Pl Class implements smooth and calm analog tone quality of Phass original.

    PI-1M

    Rated output power @ 4ohm: 100Wx1@2ohm: 150Wx1Frequency range: 10Hz-40kHzInput sensitivity: 0.2V-6VSignal-to-noise ratio: >95dBImpedance: 2-8ΩFuse size: 1X20ATHD & Noise: <0.05%Dimensions (L x W x H): 210x85x43

    PI-2

    PI-2 Two channel amplifier

    Working mode: class P amplifier / 2 channelsRMS power ratings actual power4 Ohms: (@ 13.8V 1% THD+N, 1 KHz) 245W x 2ch2 Ohms: (@ 13.8V 1% THD+N, 1 KHz) 465W x 2chBridge power4 Ohms: (@ 14.4V THD+N, 1 KHz) 895W x 1chMaximum power: 1500WEQ : Bass Boost : 45Hz 0dB-12dBWorking voltage: 14.4V DC (11v-16v)Input level: 0.25v-6.0vFrequency response: 20Hz ~ 20kHz (0, - 3dB)Signal to noiseratio: 92dBTHD(RMS):<0.05%Product size: 140x40x254 (mm)

    PI-4

    PI-4 four channel power amplifier

    PI-4:Working mode: class P amplifier / 4 channelsRMS power ratings4 Ohms: (@ 13.8V 1% THD+N, 1 KHz) 80W x 4ch2 Ohms: (@ 13.8V 1% THD+N, 1 KHz) 150W x 4chBridge power4 Ohms: (@ 14.4V THD+N, 1 KHz) 250W x 2chMaximum power: 1000WWorking voltage: 14.4V DC (11v-16v)Input level: 0.25v-6.0vFrequency response: 20Hz ~ 20kHz (0, - 3dB)Signal to noise ratio: 92dBTHD(RMS):<0.05%Product size: 140x40x224 (mm)

    PI-5

    PI-5 five channel power amplifier

    PI-5:Working mode: class P amplifier / 5 channelsRMS power ratings actual power4 Ohms: (@ 13.8V 1% THD+N, 1 KHz) 85W x 4ch(@ 13.8V 1% THD+N, 100KHz) 280W x 1ch2 Ohms: (@ 13.8V 1% THD+N, 1 KHz) 140W x 4ch(@ 13.8V 1% THD+N, 100KHz) 420W x 1chBridge power
    4 Ohms: (@ 14.4V THD+N, 1 KHz) 280W x 2ch(@ 14.4V THD+N, 100 KHz) 350W x 1chMaximum power: 1500WWorking voltage: 14.4V DC (11v-16v)Input level: 0.25v-6.0vFrequency response: 20Hz ~ 20kHz (0, - 3dB)SNR: 93dBTHD(RMS):<0.05%Product size: 140x40x284 (mm)

    PE series, with the use of sole amp, can fulfill high HIFI sound quality and even complete car audio system for users with demand of higher timbre and sound-printing quality than those from Pl series.

    PE-6

    PE-6 six channel power amplifier

    PE-6:Working mode: class P amplifier / 6 channelsRMS power ratings actual power4 Ohms: (@ 13.8V 1% THD+N, 1 KHz) 100W x 4ch(@ 13.8V 1% THD+N, 1 KHz) 150W x 2ch2 Ohms: (@ 13.8V 1% THD+N, 1 KHz) 150W x 4ch(@ 13.8V 1% THD+N, 1 KHz) 320W x 2chBridge connection4 Ohms: (@ 14.4V THD+N, 1 KHz) 300W x 2(@ 14.4V THD+N, 1 KHz) 600W x 1Maximum power: 2500WWorking voltage: 14.4V DC (11v-16v)Input level: 0.25v-6.0vFrequency response: 20Hz ~ 20kHz (0, - 3dB)Signal to noise ratio: 95dB<RMSTHD(RMS):<0.05%Product size: 140x40x342.4 (mm)

    AP4.75

    PA 2 product features1. Double-sided design and placement process effectively shorten the loop impedance and line resistance, and further improve the fidelity2. In order to reduce electromagnetic interference, the pre-amplification and transformer and filter inductors are designed with shielded boxes, which reduce distortion and improve the high signal-to-noise ratio3. With the "Bias Settings" adjustment function ("Class" knob) on the side, users can combine their personal preferences to make the amplifier work in pure class A (Max) and class AB (Min) by adjusting the knob: the sound is warmer and more pleasant in pure class A mode, while the whole machine is more efficient in class AB mode.4. Symmetrical design of left and right channels, effectively reduce crosstalk between channels, and higher channel separation5. Built-in intelligent low-noise risk control automatic adjustment function, internal low-noise and high-speed fan to assist the heat dissipation of the whole machine, to ensure that the internal components avoid overheating and failure, and each component always runs in the best state6. The output of the power amplifier stage adopts silver-plated wire instead of copper foil trace, which greatly reduces the line loss and lower output impedance7. The power amplifier output adopts "DC automatic servo circuit", so that the output DC potential tends to 0 and the dynamic performance is better8. The core device adopts imported well-known brand, with both quality and performance:(1) The main amplifying transistor adopts the Japanese "Sanken" brand(2) The secondary filter electrolytic capacitor adopts the Japanese "ELNA" brand(3) The primary filter electrolytic capacitor is selected from the Japanese "Rubycon" brand(4) The audio coupling capacitor adopts the German "WIMA" brand(5) The op amp adopts the Japanese "JRC" brand audio special op amp "MUSES8820"

    Model : PA 24 ohm stereo (Class AB): 110W x 2 14.4V rated power (watts)2 ohm stereo (Class AB): 220W x 2 14.4V rated power (watts)4 ohm stereo (Class A): 60W x 2 14.4V rated power (watts)2 ohm stereo (Class A): 95W x 2 14.4V rated power (watts)Minimum load impedance: 2 ohmsDamping factor: 4 ohms >36@1K HzInput Sensitivity Range: 0.4-6 @14.4V Rated (Watts)Input impedance: 5 kOhmsFrequency response range: 5-250000 Hz -3 dB @ 1 wattLinear: ± 0.2 dB @ 1 watt 20-20,000 HzNegative feedback value: 0 dBTotal Harmonic Distortion (THD): <0.8 1 kHz maximum 50% power % Crossover distortion (IMD): <0.12 1 kHz max 50% power signal-to-noise ratio: >101 (>104) dB @ 10 watts ("A" weighted)Channel separation: >60 dB @ 1 kHz maximum powerInput voltage range: 10.5-16 voltsStandby current (without input): 3.8A @14.4VFuse: 50 ampsDimensions (LxWxH): 492x223x54mm

    PA4 advantages(1) Integrated aluminum radiator, no deformation, good thermal conductivity; The surface is treated with drawn filament oxidation, which is more elegant.(2) In line with the design trend, the two sides panel and bottom cover adopt aluminum plate lightweight design.(3) Gold-plated potentiometer, with brushed process panel, highlighting noble temperament.(4) The side panel boldly embedded in the mahogany decorative panel, combined with high-fidelity sound quality, achieves a "refreshing" name.(5) Using American "CMC" brand silver-plated RCA plug, the contact resistance is smaller, ensuring the purity of signal input.(6) Transparent gold-plated die-cast terminal block, which is not only high-grade, but also convenient to connect wires, to ensure that the input energy is abundant and the contact resistance is low enough.(7) The internal transformer and filter inductor of the power amplifier are designed with metal shielding cover, which can not only ensure heat dissipation but also reduce interference.(8) Built-in intelligent temperature control system: automatically adjust the speed of the double-ball high-speed fan, and actively adjust the internal temperature.(9) The power amplifier adopts "ELNA" brand electrolytic capacitors imported from Japan, with excellent performance.(10) The signal coupling adopts German "WIMA" brand box capacitor, which has less distortion.(11) The power amplifier output adopts silver-plated output line, which has stronger load capacity and lower impedance.(12) The double-panel plus patch process design is adopted, which effectively shortens the circuit loop, reduces the internal resistance of the whole machine and has better stability.(13) The front stage of the power amplifier adopts a shielding box design to reduce signal crosstalk and higher fidelity!(14) The power amplifier tube adopts the "SANKEN" brand 2SC3519A/2SA1386A audio pair tube imported from Japan, which has superior quality.(15) The panel has the function of adjusting the working mode (CLASS): users can make the whole machine in a class AB state with higher efficiency or a class A state with better sound quality according to personal habits.(16) Independent adjustment function of each channel gain: according to the installation position and listening habits, adjust the gain of each channel to achieve the best balance state of the sound field