Allnic Audio

Phono Stage


H-7000 LCR Phono Stage

The up-grade model of legendary H-3000V, all transformer coupled LCR phono stage. World premier Three Inputs mode, this is a long wish of vinyl lovers, having tri inputs in one machine, head-amplifier(pre-pre or electronic step-up) input, traditional step-up transformer input and MM direct input(you can connect your favorite step-ups also). LCR Equalization. On the contrary to the traditional CR or NFB equalization of high impedance (hundred kilo ohms), LCR uses 600 ohms’ constant impedance, a big difference on frequency range and energetic operation. LCR Multi-curve Equalization. This is also world-premier, Allnic’s Multi-curve LCR unit has 4 turn-over(250Hz, 400Hz, 500Hz RIAA and 700Hz) and 4 Roll-off(-16dB, -13.7dB RIAA, -11dB and -5dB), this means you can enjoy playing any LP before RIAA standardization.

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  • SPECIFICATIONS

    Inputs: Moving Coil (MC) × two (2) pairs unbalanced (RCA) Moving Magnet (MM) x two (2) pairs unbalanced (RCA)

    Ground: One (1) x screw type terminal

    Outputs: One (1) pair x unbalanced (RCA) One (1) pair x balanced (XLR)

    Frequency (RIAA): 20Hz ~ 20KHz (±0.5db) 30Hz ~ 15kHz (±0.3dB)

    Voltage Gains: MM +40dB (1KHz) MC +62, +66, +68, +72dB (1Khz)

    Input Impedance: MC up to 860Ω or 280 Ω MM 47kΩ

    Maximum Input Voltage (MM, non-clipping): 20Hz / 10mV 100Hz / 50mV 1kHz / 220mV 10kHz / 690mV

    THD (Total Harmonic Distortion): Less than 0.3% (1KHz, Output 1V)

    Output Impedance: 200Ω (Constant) S/N Ratio: -85db (CCIR, 1KHz)

    Power Consumption: 80W – 110/120 / 60Hz Fuse: AC 2A, 250V

    Dimensions: Phono Stage: 430mm x 350mm x 173mm (W x D x H)

    Power supply: 170mm x 275mm x 118mm (W x D x H)

    Weight: Phono Stage: 15.7 Kg (34.62 lbs)
    unpacked Power supply: 8.1 Kg (18 lbs)
    unpacked Both units inoriginal packing: 30 Kg (66 lbs)

    6AH6S, CV2521) × 2 (Voltage Regulators)
    5U4GB X 1 (Rectifier, only tube in the power supply)
    7233 (no equivalent) × 2 (Voltage Regulators)
    5654 (similar to 6AH6, 6AH6WA



H-1500 LCR Plus RIAA Phono Stage

LCR TYPE RIAA EQUALIZATION

RIAA Equalization is specification for the correct playback of vinyl records, established by the Recording Industry Association of America. The purpose of the equalization is to permit longer playback times, and improve sound quality.

RIAA equalization is a form of pre-emphasis (in the recording process) and de-emphasis on playback.

A record is cut with low frequencies reduced ( to conserve groove width and allow greater the surface noise also). The result is a flat frequency response. There are four types of de- emphasis method on playback.

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  • SPECIFICATIONS

    Frequency (RIAA) : 20Hz ~ 20kHz (±0.3dB)

    Voltage Gain : +40dB (1kHz) MM +66dB (1kHz) MC

    Input Impedance : MC up to 117Ω MM 47kΩ

    Maximum Input Voltage (MM, non-clipping): 20Hz / 10mV 100Hz / 100mV 1kHz / 240mV 10kHz / 280mV

    THD (Total Harmonic distortion) : less than 0.17% (1kHz output 1V)

    Output Impedance : 430Ω (On-off method)

    S/N Ratio : -86dB (CCIR, 1kHz)

    Tubes : 5842 x 6, E282F x 2 A2293 x 2, 6BH6 x 2 (Automatic Voltage Regulator) 5AR4 x 1 (Rectifier)

    Dimension Amp : 430mm(W) × 275mm(D) × 118mm(H) ♧ Power supply : 170mm(W) × 275mm(D) × 118mm(H)

    Weight ♧ Main Amp : 6.8kg ♧ Power supply : 6.0kg

    Power Consumption : 70W / 220V / 60Hz

 

H-1201 Phono Stage

INTRODUCING THE H-1201 PHONO STAGE
The H-1201 is Allnic Audio's entry level phono stage model. Like all Allnic Audio products, it uses Permalloy (iron and nickel alloy) for its transformer cores. Allnic is grateful to Mr. G.W. Elmen of Western Electric for inventing Permalloy for transformer core use, and in so doing, providing an enormous service to recorded music listeners everywhere.

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  • SPECIFICATIONS

    Inputs: One (1) pair Moving Coil (MC) unbalanced (RCA)

    One (1) pair Moving Magnet (MM) unbalanced (RCA)

    Ground: Two (2) x screw type terminal

    Output: One (1) pair x unbalanced (RCA)

    Frequency (RIAA): 20Hz~20KHz(±0.3db)

    Voltage Gain: MM: +38db (lKHz)

    MC: Variable: +22dB, +26dB,+28dB, +32dB (lKhz)

    Input Impedance: MC up to 2800 MM47kO

    Maximum Input Voltage

    (MM, non-clipping):
    20Hz / 30mV
    100Hz/60mV
    lKHz/300mV
    10KHz/500mV

    THD(Total Harmonic Distortion): Less than 0.3% (lKHz, Output IV)

    Output Impedance: 1.2KO (on-off method)

    S/N Ratio: -68db (CCIR, lKHz)

    Power Consumption: 20W/220V@60Hz

    Tubes: E180CC - New old stock - approximately electrically (not sonically) equivalent: CV8431, 7062, 5965, 12AV7, 6414, 6829

    Fuse: AC 2A, 250V

    Dimensions: 310mm (~12.3 inches) x 230mm (~9.1 inches) x 140mm (~5.6 inches) (WxDxH)

    Weight:
    Unpacked: 4.5 Kg (9.9 lbs)
    Packaged: 6 Kg (13.2)



Preamplifiers

L-7000 Line Preamplifier

Immerse yourself in the original recorded space. The L-7000 is a single gain stage, transformer coupled, remote controlled line stage pre-amplifier. It uses the DHT 300B as a voltage regulator. The 300B has justly won the reputation for being a superb output tube in single-ended amplifiers. But it will take some rethinking to imagine this great tube in a non-audio role. The benefit the 300B brings to as a voltage regulator is its ability to pass a fair amount of current at low cathode-to-plate voltages, the result of haveing a low Rp.

The L-7000 offers world class, holographic soundstaging combined with incredible resolution, clarity, micro-dynamics, and drive. Instrument and vocal tone and timbre are lifelike; placement of instruments and bodies in three dimensions startling, life-size, and addictive. The L-7000 has no voice of its own. It is silent, except for the music emanating from the blackest of backgrounds. The outstanding sonic quality is matched by the simple elegance, flexibility and ergonomic functionality of the casework and connection options. Few pre-amplifiers can compete. The L-7000 is, simply, a revelation.

The L-7000 is Allnic Audio’s reference line stage pre-amplifier. Like all Allnic Audio products, it uses permalloy (iron and nickel alloy) for its transformer cores. Allnic is grateful to Mr. G.W. Elmen of We stern Electric for inventing permalloy for transformer core use, and in so doing, providing an enormous service to recorded music listeners everywhere.

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  • SPECIFICATIONS

    SPECIFICATIONS FOR THE ALLNIC AUDIO L-7000 LINE STAGE PREAMPLIFIER

    Inputs: Line level × 5 pairs (Balanced × 2, Unbalanced (RCA) × 3)

    Outputs: Balanced × 2 pair Unbalanced × 1 pair

    Input Impedance: Unbalanced 10kΩ pastedGraphic.png Balanced 10kΩ

    Frequency Range: 20Hz ~ 20kHz (FLAT) 16Hz ~ 75kHz (-3dB)

    Output 1.0V, 0.15%

    S/N Ratio: -90dB (CCIR, 1kHz)

    Maximum Output: 15V RMS (Non-clipping)

    Output Impedance: 150Ω Constant

    Power Consumption: 30W at 110/220V / 60 Hz

    Tubes: E810F (or D3a) × 2 (gain stage) 300B (Voltage Regulator) × 2 5654 (Error Detector) × 2

    Fuse: 2A 250V

    Dimensions: 430mm (16.9291 inches) (W) 350mm (11.811 inches) (D) 173mm (4.72441 inches) (H)

    Weight: 16 kg (35.3 lbs) unpacked.
    Packed shipping weight in original shipping material is 20 kg. (44.1 lbs)

L-1500 Line Preamplifier

L-1500 is the budget version of L-4000.

Single gain stage: Single gain stage circuit uses only 'one' tube in amplification, which reproduces purer, more detailed, more spacious and more dynamic sound than multi gain stages, just like through one window glass we can see outside scene more clearly than through several window panes.

Line output transformer coupling: In tube amp circuitry, there are two coupling methods, one, capacitor coupling the other transformer one. The former, traditional, low cost and somewhat stable transfers only voltage not wattage (not real energy), the latter conveys about 90%(transformer loss about10%) of real wattage. No comparison between them for the driving capacity of power amplifier. All the advantages of transformer coupling too simply depend on the quality of transformer and on the choice of tubes. Allnic's unprecedented wide (16Hz ~ 75kHz, -3db), low distortional and ultra-flexible (up to 50kHz square wave response) output transformer realizes this ideal preamplifier. We also chose the right tube (ideal three factors, high gm, low internal resistance and high mu) for this position.

Constant and low output impedance: Low output impedance is prerequisite to a good preamplifier. L-1500 has 150Ω constant output impedance at all frequencies. In C-R coupling "the cathod follower circuit" usually being applied to lower output impedance accompanies high distortion problem and has "L" shaped output impedance curve.

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  • SPECIFICATIONS

    Input : Line level × 5 (Balanced × 2, Unbalanced × 3)

    Output : Balanced × 1, unbalanced × 1

    Input Impedance : Unbalanced 10kΩ Balanced 20kΩ

    Frequency Range : 20Hz ~ 20kHz (FLAT) 16Hz ~ 75kHz (-3dB)

    Voltage Gain : +20dB

    THD (1kHz) : Output 0.3V, 0.06% Output 1.0V, 0.15%

    S/N Ratio : -90dB (CCIR, 1kHz)

    Maximum Output : 15V RMS (Non clipping)

    Output Impedance : 150Ω Constant

    Tubes : D3a or equivalent × 2 7233 × 2, 6485 × 2 (Voltage Regulator)

    Dimension : 430mm(W) × 300mm(D) × 120mm(H)

    Weight : 9 kg

M3000 MK2

L-1500 is the budget version of L-4000.

The M3000 MK2 monoblocks are Allnic Audio’s top of theline, parallel push-pull power amplifier model. Like allAllnic Audio products, the M3000 MK2 has Permalloy (ironand nickel alloy) for its transformer cores. Allnic isgrateful to Mr. G.W. Elmen of Western Electric forinventing Permalloy for transformer core use, and in sodoing, providing an enormous service to recordedmusic listeners everywhere.

Features of the M3000 MK2

 200 watts of high power output. T

 Powerful Driving Circuitry.

 “Full Engagement" Output Transformers.

 Large Nickel/FeSi Core Output Transformers.

 Analogue Power Tube Current Monitors.

 Beautiful 20KHz square wave response.

 As are all Allnic Audio products, the M-3000 is fullyRoHS (EU Reduction of Hazardous Substancesregulation) compliant in construction and materials.

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  • SPECIFICATIONS

    Output Power: 200w (8Ω load, at 1KHz)

    Distortion: 0.17% at 1KHz at 10w

    Frequency Response: 20Hz - 20KHz Flat

    S/N Ratio: -80dB (CCIR, 1KHz)

    Damping Factor: 8 at 8Ω load at 1KHz

    Voltage gain: +24dB

    Input Impedance: 100KΩ (single-ended, unbalanced) Input Sensitivity: 2.0V for rated power

    Fuses: 0.5A, 250V, 20mm slow-blow(KT120’s)5A, 250V, 20mm slow-blow (IECMains)

    Tubes (per chassis): KT150 X 4 (power triode)E282F X 2 (second stage drivers)6AK6 X 1 (first stage driver)

    Dimensions: (W x D x H) 430mm (16.93 inches) x430mm (16.93 inches) X 240mm(9.45 inches)

    Weight: 40Kg (88.2 lbs) net per monoblock.55Kg (121 lbs) shipping weight permonoblock

Power Amplifiers

A-6000 Double Para-SE Mono

High power output 50w Pure Class A Double Parallel SE power amplifier. Almost other 300B amplifiers are underdriven or distorted- driven by conventional "Resister-Capacitor" circuit which gives only up to around 70V swing voltage with high distortion. This means prior distorted sound to deep biased 300B grid. Our powerful "Inductor Drive" circuit gives up to 150V swing voltage with very low distortion,(about 0.3%) that's why A-6000 has higher output 50w.

Real power drive. Our choke inductor (100% nickel permalloy PC core) has very low power loss and infinitely high load impedance. The driver tube 6GV8 has strong power pentode, we use this power pentode to drive 300B via choke plate inductor. This is one of the ideal drive stages for 300B SE.

Nickel alloy output transformer. We use a sophisticated ratio mixed nickel permally PB cored output transformers. Due to its extremely high initial permeability, it allows us lower turns of primary winding with still higher 'open circuit inductance', which means very wide frequency range and low distorted bass response. This is another reason why our A-6000 excels other 300B power amplifiers. We also use very big nickel core, not to be magnetically saturated at high current 400mA.

Long life and trouble-free operation. We employ the 'Soft start circuit' to protect tubes and other parts. It applys high B+ voltage only after tubes are fully warmed-up.

Fixed bias control grid. We prefer low distortion and high output 'Fixed Bias' to high distortion and lower output 'Self Bias' method. We can get rid of those hot cathode resisters.

Natural negative feedback. We apply about -6dB, a natural negative feedback to upgrade 300B single ended to main amplifier from hobby D.I.Y or sub system, due to its' colorful and weak speaker driving force. With this natural feedback, we can get high 'Damping Factor', very low distortion, higher S/N ratio without losing single ended natural sound.

Hard wiring. We make A-6000 all hard wired.

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  • SPECIFICATIONS

    Output Power: 50w(8Ω load, at 1KHz)

    Distortion: 0.3% at 1KHz, 2.83V

    Input Impedance: 100kΩ(unbalanced)

    Frequency Response: 20Hz ~ 20kHz (FLAT)

    Voltage Gain: +24dB

    Damping Factor: 10 at 8Ω load at 1KHz

    S/N Ratio: -80dB (CCIR, 1kHz)

    Input Sensitivity: 0.7V for rated power

    Tubes: 300BX4, 6GV8X2

    Dimension : 430mm(W) × 470mm(D) × 240mm(H)

    Weight : 40 kg

A-5000NEO 300B Para-SE Mono

High power output 25w 300B Parallel SE power amplifier. Almost other 300B amplifiers are underdriven or distorted- driven by conventional "Resister-Capacitor" circuit which gives only up to around 70V swing voltage with high distortion. This means prior distorted sound to deep biased 300B grid. Our powerful "Inductor Drive" circuit gives up to 150V swing voltage with very low distortion,(about 0.3%) that's why A-5000NEO has higher output 25w.

Real power drive. Our choke inductor (100% nickel permalloy PC core) has very low power loss and infinitely high load impedance. The driver tube 6GV8 has strong power pentode, we use this power pentode to drive 300B via choke plate inductor. This is one of the ideal drive stages for 300B SE.

Nickel alloy output transformer. We use a sophisticated ratio mixed nickel permally PB cored output transformers. Due to its extremely high initial permeability, it allows us lower turns of primary winding with still higher 'open circuit inductance', which means very wide frequency range and low distorted bass response. This is another reason why our A-5000NEO excels other 300B power amplifiers. We also use very big nickel core, not to be magnetically saturated at high current 200mA.

Long life and trouble-free operation. We employ the 'Soft start circuit' to protect tubes and other parts. It applys high B+ voltage only after tubes are fully warmed-up.

Fixed bias control grid. We prefer low distortion and high output 'Fixed Bias' to high distortion and lower output 'Self Bias' method. We can get rid of those hot cathode resisters.

Natural negative feedback. We apply about -6dB, a natural negative feedback to upgrade 300B single ended to main amplifier from hobby D.I.Y or sub system, due to its' colorful and weak speaker driving force. With this natural feedback, we can get high 'Damping Factor', very low distortion, higher S/N ratio without losing single ended natural sound.

Hard wiring. We make A-5000NEO all hard wired.

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  • SPECIFICATIONS

    Output Power: 25w(8Ω load, at 1KHz)

    Distortion: 0.3% at 1KHz, 2.83V

    Input Impedance: 100kΩ(unbalanced)

    Frequency Response: 20Hz ~ 20kHz (FLAT)

    Voltage Gain: +24dB

    Damping Factor: 10 at 8Ω load at 1KHz

    S/N Ratio: -80dB (CCIR, 1kHz)

    Input Sensitivity: 0.7V for rated power

    Tubes: 300BX4, 6GV8X2

    Dimension : 430mm(W) × 330mm(D) × 240mm(H)

    Weight : 20 kg

A-1500 300B SE Stereo Amplifier

High power output 12.5w + 12.5w 300B SE stereo power amplifier. Almost other 300B amplifiers are underdriven or distorted- driven by conventional "Resister-Capacitor" circuit which gives only up to around 70V swing voltage with high distortion. This means prior distorted sound to deep biased 300B grid. Our powerful "Inductor Drive" circuit gives up to 150V swing voltage with very low distortion,(about 0.3%) that's why A-1500 has higher output 12.5w + 12.5w.

Real power drive. Our choke inductor (100% nickel permalloy PC core) has very low power loss and infinitely high load impedance. The driver tube 6GV8 has strong power pentode, we use this power pentode to drive 300B via choke plate inductor. This is one of the ideal drive stages for 300B SE.

Nickel alloy output transformer. We use a sophisticated ratio mixed nickel permally PB cored output transformers. Due to its extremely high initial permeability, it allows us lower turns of primary winding with still higher 'open circuit inductance', which means very wide frequency range and low distorted bass response. This is another reason why our A-1500 excels other 300B power amplifiers.

Long life and trouble-free operation. We employ the 'Soft start circuit' to protect tubes and other parts. It applys high B+ voltage only after tubes are fully warmed-up.

Fixed bias control grid. We prefer low distortion and high output 'Fixed Bias' to high distortion and lower output 'Self Bias' method. We can get rid of those hot cathode resisters.

Natural negative feedback. We apply about -6dB, a natural negative feedback to upgrade 300B single ended to main amplifier from hobby D.I.Y or sub system, due to its' colorful and weak speaker driving force. With this natural feedback, we can get high 'Damping Factor', very low distortion, higher S/N ratio without losing single ended natural sound.

Hard wiring. We make A-5000NEO all hard wired.

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  • SPECIFICATIONS

    Output Power: 12.5w x 12.5w(8Ω load, at 1KHz)

    Distortion: 0.3% at 1KHz, 2.83V

    Input Impedance: 100kΩ(unbalanced)

    Frequency Response: 20Hz ~ 20kHz (FLAT)

    Voltage Gain: +24dB

    Damping Factor: 10 at 8Ω load at 1KHz

    S/N Ratio: -80dB (CCIR, 1kHz)

    Input Sensitivity: 0.7V for rated power

    Tubes: 300BX4, 6GV8X2

    Dimension : 430mm(W) × 330mm(D) × 240mm(H)

    Weight : 20 kg

A-1500 300B SE Stereo Amplifier

High power output 12.5w + 12.5w 300B SE stereo power amplifier. Almost other 300B amplifiers are underdriven or distorted- driven by conventional "Resister-Capacitor" circuit which gives only up to around 70V swing voltage with high distortion. This means prior distorted sound to deep biased 300B grid. Our powerful "Inductor Drive" circuit gives up to 150V swing voltage with very low distortion,(about 0.3%) that's why A-1500 has higher output 12.5w + 12.5w.

Real power drive. Our choke inductor (100% nickel permalloy PC core) has very low power loss and infinitely high load impedance. The driver tube 6GV8 has strong power pentode, we use this power pentode to drive 300B via choke plate inductor. This is one of the ideal drive stages for 300B SE.

Nickel alloy output transformer. We use a sophisticated ratio mixed nickel permally PB cored output transformers. Due to its extremely high initial permeability, it allows us lower turns of primary winding with still higher 'open circuit inductance', which means very wide frequency range and low distorted bass response. This is another reason why our A-1500 excels other 300B power amplifiers.

Long life and trouble-free operation. We employ the 'Soft start circuit' to protect tubes and other parts. It applys high B+ voltage only after tubes are fully warmed-up.

Fixed bias control grid. We prefer low distortion and high output 'Fixed Bias' to high distortion and lower output 'Self Bias' method. We can get rid of those hot cathode resisters.

Natural negative feedback. We apply about -6dB, a natural negative feedback to upgrade 300B single ended to main amplifier from hobby D.I.Y or sub system, due to its' colorful and weak speaker driving force. With this natural feedback, we can get high 'Damping Factor', very low distortion, higher S/N ratio without losing single ended natural sound.

Hard wiring. We make A-5000NEO all hard wired.

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  • SPECIFICATIONS

    Output Power: 140w(8Ω load, at 1KHz)

    Distortion: 0.3% at 1KHz, 2.83V

    Input Impedance: 100kΩ(unbalanced)

    Frequency Response: 20Hz ~ 20kHz (FLAT)

    Voltage Gain: +24dB

    Damping Factor: 10 at 8Ω load at 1KHz

    S/N Ratio: -80dB (CCIR, 1kHz)

    Input Sensitivity: 0.7V for rated power

    Tubes: 300BX4, 6GV8X2

    Dimension : 430mm(W) × 330mm(D) × 240mm(H)

    Weight : 20 kg

Pre Preamplifiers / Step Up Transformers

  • SPECIFICATIONS

    Input Load Impedances: 50, 100, 200 and 500 Ohms Selectable

    Frequency Response Range: 15Hz ~ 125kHz (0dB, -3dB)

    Voltage Gain: 31.5dB

    S/N Ratio: more than -100db(CCIR)

    Maximum Input Voltage: 530mV (20Hz ~ 20KHz) Non-Clipping

    Dimension: 215mm(W) × 290mm(D) × 115mm(H)

    Weight: 2.5 kg Power Supply 5.8 kg

    AC Power Requirement: 220VAC / 60Hz / 32W

AUT-2000 Step-up Transformer

Deeper Bass Sound: Using big size Nickel Permally PC core results higher saturation of input voltage and subsequently reproduce deeper bass sound. Improved High Frequency Response: Employing five sectioned sandwich winding method lessens leakage inductance and capacitance.

Solid and Durable Frame: To damp the mechanical vibration, Allnic AUT-2000 is precisely machined from solid aluminum alloy block and the clearances between transformers and main frame are filled with silicone elastomer having excellent absorbing characteristics.

Using Separate Selector: In order to stop the crosstalk in selectors and connecting wires, Allnic AUT-2000 is equipped with separate gain selectors for each channel.

Emphasized Selectivity in Lower Gains: Selectivity in lower gain was emphasized to deal with ever growing high output MC cartridges in these days.

Flat Signal Responses in a Broad Frequency Range: Allnic AUT-2000 flatly responses in a broad frequency range with secondary load resistor at 47 kOhms as installed for MM cartridges in phono stage circuitry. (We do not manipulate lower resistors to make flatter response curve.) Table 1 shows signal response at each gain level.

Gain Level Frequency Range Signal Response
+20 dB Gain (x10) 20 Hz - 20 kHz -0.2 dB, -0.2 dB
+24 dB Gain (x15) 20 Hz - 20 kHz 0 dB, 0 dB
+26 dB Gain (x20) 20 Hz - 20 kHz -0.6 dB, -0.6 dB
+30 dB Gain (x30) 20 Hz - 20 kHz -1.5 dB, -1.5 dB

[Table 1] Signal Responses at each Gain level Measured by Tektronix CFG 253 Oscillator, Leader LMV-189AR AC Voltmeter

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  • SPECIFICATIONS

    Front Panel Gain Selectors: 10배, +20dB Gain / 15배, +24dB Gain / 20배, +26dB gain / 30배, +30dB Gain

    Rear Panel Connectors: Right Output Terminal / Left Output Terminal / Right MC Input Terminal / Left MC Input Terminal / Ground Connection

    THD: Less than 0.025% at 1 kHz, +20 dB Gain

    Maximum Input Level(Non Clipping): At 20Hz, 10 Times: up to 230mV 15 Times: up to 150mV 20 Times: up to 115mV 30 Times: up to 57mV / At 1kHz, For any ratio, more than 10V / At 10kHz,For ant ratio, more than 10V

    Dimensions: 160mm(w)x113mm(d)x57mm(h)

    Weight: 1860 grams

Why a step-up transformer is needed?

When you play a vinyl, the sound is picked-up by a phono cartridge and sent to phono EQ amplifier for RIAA processing. Quality phono cartridges are normally in MM(moving magnetic) or MC(moving coil) type. It is known that MC cartridges usually have superior sound than that of MM, but the former produce no more than one tenth output voltage of the latter.

Furthermore, normal phono EQ amplifiers are built for MM cartridges, not for MC, usually with voltage gain between +30dB and +40dB. Therefore, to accommodate normal phono EQ amplifier with low output MC cartridge, using step-up device, such as step-up transformer or head (pre-pre) amplifier, is required.

Gain Selectable Step-up Transformer

Among audiophiles, widely diversified modern MC (moving coil) cartridges are used. Each cartridge deploys different types of cantilever material, diamond tip shape, rubber damper material, output voltage and impedance. And phono stage amplifiers apply different voltage gains depending on models and manufacturers. In order to cope with such complexity of user environment, step-up transformer has to be gain selectable without compromising sound quality. AUT-2000 Step-up Transformer has features of gain selectivity, excellent square wave response over broad frequency range and extremely low noise level.