Allnic Audio

Phono Stage


H-3000 LCR Phono Stage

Orthodox LCR phono stage all-transformer coupled. Extra-ordinary RIAA phono equalizer thoroughly coupled by transformers. All transformers should have not only perfectly flat frequency range(20Hz ~ 20kHz) but also very low winding resistance to reduce the power loss in order to obtain good RIAA curve (especially for low frequency) Allnic's sophisticated technology in designing and manufacturing of transformer could make through with this phono stage.

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  • SPECIFICATIONS

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

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

    Input Impedance : MC up to 117Ω MM 47kΩ

    Maximum Input Voltage : 20Hz / 10mV (MM, non-clipping) 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)

    Tubes : D3a or equivalent × 4 A2293 × 2 (A.V.R) 6BH6 × 2 (A.V.R)

    Dimension ♧ Main Amp : 430mm(W) × 350mm(D) × 173mm(H) ♧ Power supply : 170mm(W) × 275mm(D) × 118mm(H)

    Weight ♧ Main Amp : 15.7kg ♧

    Power supply : 6.0kg Power Consumption : 80W / 220V / 60Hz



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-1200 Phono Stage

The smallest phono stage of vacuum tube type using small pencil twine triodes 6112 and 6021. Quality permalloy PC MC step-up transformers included, without external MC-step-up. MM/MC dual input possible. RIAA equalization CR type precisely compensated within ±0.3db. Automatic Voltage Regulation circuit of semi-conductor ensures quieter operation. Its small size makes it possible to be installed near a turntable to shorten inter-connector cables as possible. Pure non-negative feedback circuit.

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  • SPECIFICATIONS

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

    Voltage Gain : +36dB (1kHz) MM +64dB (1kHz) MC

    Input Impedance : MC up to 52Ω MM 47kΩ

    Maximum Input Voltage(MM, non-clipping): 20Hz / 30mV 100Hz / 60mV 1kHz / 300mV 10kHz / 500mV

    THD (Total Harmonic distortion) : less than 0.3% (1kHz output 1V)

    Output Impedance : 1.2Ω (On-off method)

    S/N Ratio : -68dB (CCIR, 1kHz)

    Tubes : Tube : 6112 × 2 6021 × 2

    Dimensions: 112mm × 250mm × 93mm (W×D×H)

    Weight: 2.2kg

    Power Consumption : 80W / 220V / 60Hz



Preamplifiers

L-4000 Line Preamplifier

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-4000 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) × 350mm(D) × 173mm(H)

    Weight : 17 kg

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

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

MC Phono Cartridge

Verito MC Phono Cartridge

WE REPRODUCE MUSIC JUST AS VINYL ENGRAVERS CUT. Every LP record has been produced through LP Cutting Lathe's Cutter Head which is the mother of all vinyl grooves in mechanical sense. ALLNIC believes that the vinyl should be replayed via Cutter Head Mechanism, only with slippery diamond stylus, not with diamond shovel to cut.

STRUCTURE MAKES BIG DIFFERENCE. Many cartridge manufacturers boast of using special material, good tip and solid body, etc, not of their superior conception, that is, excellent construction.

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  • SPECIFICATIONS

    Output Voltage: 0.4mV(1KHz, 5cm/s)

    Impedance: 28 ohms

    Compliance: 6 x 10-6 dyne/cm(100Hz)

    Tracking Force: 2.0 grams(+-0.2gram)

    Channel Separation: 25dB above

    Channel Balance: Within 1db

    Frequency Response: 20Hz - 30KHz

    Cantilever: Alluminum Alloy

    Stylus: Nude Diamond Elliptical 0.7 x 0.3 mil

    Cartridge Weight: 8 grams

Pre Preamplifiers / Step Up Transformers

HT-2500 Pre-preamplifier (Head Amp)

Innovative Fixed Bias Circuit: In the HT-2500, nuvistor tube 7895 or equivalents, the smallest vacuum tube performs its perfect role, as for amplifying device, enhancing the tiniest signal in audio, the output voltage of MC cartridges to fit to MM input of phono stages. ALLNIC applies its innovative fixed bias circuit to get quieter and more stable operation of the tubes, furthermore this circuit eliminates automatically the subsonics so harmful to phono stages, due to the very characteristics of R.I.A.A Curve, which mercilessly amplifies the lower frequencies the louder and breaks the tonal balance. Again this fixed bias circuit sustains a negative DC voltage to the grid of tube and to the input coupling capacitor and blocks fundamentally "the zero crossover distortion" of capacitor, so common phenomenon, so easily neglected in ordinary prepreamplifiers. The result of no "Zero crossover distortion", the clearer and the more vivid reproduction of the music.

Very High S/N Ratio: The above mentioned characteristics of R.I.A.A curve demand hum-free clean prepreamplifier, which finally induced to clean power supply circuit. Even one micro volt(1/1,000,000 of one volt) of hum noise(120Hz hum)in the output signal of a prepreamplifier will result 63mV to the final loud speakers. No one could accept it. ALLNIC has strong technology of automatic voltage regulation circuitry by pure vacuum tubes. This voltage regulation circuit rejects any hum noise to the naught practically.

Extremely Wide Frequency Range: Though HT-2500 has single gain stage and non-negative feedback, it has the capacity to extend from 15Hz up to 125Khz(-3dB) and could reveal the richest musical information of vinyl grooves, never heard of until now.

Ultra Flexibility: The capability of following up so unpredictable musical signals with ease could be graded by the responsibility to the square wave of high frequencies, especially at 10Khz, rarely at 20Khz, this ability is strongly believed to be the core of the musicality in audio equipments. ALLNIC shows the response shape at 100Khz beautifully.

Micro-Phonic Free Tube Damping Know-how: ALLNIC`s Absorb-Gel® tube damping know-how culminates in HT-2500, every extreme technology applied.

Variable Input Load Impedances: HT-2500 has four input load impedances 50, 100, 200, and 500 ohms selectable from front panel according to the output impedances of your MC cartridges. Furthermore these loads are pure resists, not compound one of step-up transformers, so it gives pure and clean sound.

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  • 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

Gain Selectable Step-up Transformer

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.