No announcement yet.

New Allnic Line Stage

  • Time
  • Show
Clear All
new posts

  • New Allnic Line Stage

    Click image for larger version  Name:	IMG_3473.PNG Views:	1 Size:	496.2 KB ID:	54379
    Click image for larger version  Name:	IMG_3472.PNG Views:	1 Size:	470.9 KB ID:	54380
    Click image for larger version

Name:	image_8338.png
Views:	236
Size:	448.0 KB
ID:	54378

    L-7000 Dual Mono Line Stage

    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.

    The L-7000 has the following features:

    • DHT 300B as a series voltage regulator. The benefit the 300B brings to a voltage regulator is its ability to pass a fair amount of current at low cathode-to-plate resistance, the result of haveing a low voltage drop.

    • True Dual-Mono design. Each of the two channels operates completely independent of the other. The chassis, attenuator control and the AC power connection are the only parts of this pre-amplifier that both channels share.

    • Single gain stage. A single gain stage circuit uses only one tube for amplification (“gain”). This reproduces a purer, more detailed, more spacious and more dynamic sound than multiple gain stages.

    • Line output transformer coupling. The L-7000 is “transformer coupled”. In tube amp circuitry, there are two coupling methods; one is capacitor coupling and the other is transformer coupling. Capacitor coupling is the traditional, low cost method. It is somewhat stable but transfers only voltage, not wattage (i.e., not real energy). With transformer coupling, about 90% of real wattage is transferred (there is still a transformer loss of about 10% of wattage, while voltage is not affected).

    • In-house transformer manufacturing and transformer/tube matching. While transformer coupling is superior to capacitor coupling, all the advantages of transformer coupling depend on the quality of the transformer and on the choice of tubes. Allnic Audio manufactures its own transformers and uses what it views to be the best core material, permalloy. Allnic Audio’s unprecedented, wide (16 Hz ~ 50 kHz, -3db), low distortional, and ultra-flexible (up to 20 kHz square wave response) output transformer helps Allnic Audio to realize the ideal transformer coupled pre-amplifier. Of course, gain tubes are also carefully selected for three critical factors for function with the permalloy output transformers: high gm, low internal resistance and high mu.

    • Power supply circuit with under 1% voltage regulation. The voltage regulation of the transformer is the percentage change in the output voltage from no-load to full-load. To get the best performance out of your transformer, you need the lowest possible voltage regulation. The voltage regulation of Allnic’s power supply circuit is under 1%. It yields an improved power transfer and lower regulation factor, resulting in increased current speed and better dynamics.

    • Constant and low output impedance. One of the benefits of transformer coupling is that it facilitates constant low output impedance. Low output impedance is critical to the design of a good pre-amplifier. The L-7000 has a 150ohm (150Ω) constant output impedance at all frequencies. In capacitor coupling (C-R coupling), a “cathode follower circuit” is usually used to lower output impedance. Unfortunately, this method of lowering output impedance is accompanied by high distortion and has an “L” shaped output impedance curve. Please compare the two graphs below, especially for low frequency response.

    Allnic’s (left), other’s (right)

    • New vacuum tube damping technology. Allnic Audio’s patented “Absorb GEL tube damper” technology prevents harmful vibrations from reaching the signal / gain tubes and, therefore, prevents micro-phonic noise propagation in the tubes. The Allnic Audio Absorb Gel damper technology effectively solves a problem that plagues most tube amplification systems. Provided other tube components do not introduce micro-phonic noise into your system, with the Absorb Gel damping system, you will enjoy a degree of transparent sound that will surprise and please you.

    • Precision 41-step single contact attenuator volume control. The L-7000 does not employ a digital IC volume control or a low-cost carbon film volume control with a motor. Allnic Audio has developed a precision oil clutched motorized attenuator; the L-7000 has no (± 0db) channel unbalance at any volume level.

    • Pure Class A operation
    • Full balanced output circuit
    • No negative feedback design

    Key features of the Allnic Audio L-7000 line amplifier :

    300B as a series voltage regulator
    True Dual-Mono design
    Single tube gain stage
    Transformer coupling
    Constant and low (150 OHM) output impedance at all frequencies
    All NOS tubes
    Easy to read tube monitor meters
    Zero negative feedback
    Precision oil clutched motorized single contact attenuator, with zero channel imbalance at any volume
    Ultra high speed, automatic, vacuum tube voltage regulation
    Pure Class A operation
    Full balanced output circuit
    Phase control switch
    3 RCA and 2 XLR inputs
    1 RCA, 2 XLR (1 is record out) outputs
    Remote control


    Input Impedance: Unbalanced 10kΩ Balanced 10kΩ
    Frequency Range: 20Hz ~ 20kHz (FLAT) 16Hz ~ 50kHz (-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
    Power Consumption: 30W at 110/120V / 60 Hz
    Tubes: E810F × 2 (gain stage, left and right channels–there are no equivalents to these tubes); 300B (no equivalent) × 2(Voltage Regulator); 5654 (similar to EF95, 6AK5) × 2 (Voltage Error Detector)
    Fuse: 2A 250V
    Dimensions: 430mm (W) 410mm (D) 173mm (H)
    Weight: 18 kg (39.7 lbs) unpacked

    Price: $14,900
    Myles B. Astor, PhD, Administrator
    Senior Editor,

    -Zellaton Plural Evo speakers
    -Goldmund Telos 440 and 1000 Nextgen mono amps
    -Goldmund Mimesis 37S Nextgen preamplifier
    -Doshi EVO and Goldmund PH3.8 phonostage
    -VPI Vanquish direct-drive turntable
    -VPI 12-inch 3D Fat Boy dual pivot tonearm, VPI 12-inch 3D Fat Boy gimballed and SAT LM-12 arm
    -Lyra Atlas SL Lambda, vdh Colibri Master Signature, Mutech Hayabusa,
    -Technics RS1506 with Flux Magnetic heads, Doshi V3.0 tape stage (balanced)
    -Assorted cables including Skogrand, Kubala-Sosna, Audience FrontRow; Audience FrontRow, Genesis Advanced Technologies , Goldmund and Ensemble Power Cords
    -Accessories including Stillpoint Aperture panels, Cathedral Sound panels, Furutech NCF Nano AC receptacles; Silver Circle Tchaik 6 PLC, Symposium ISIS and SRA Craz 3 racks, Audiodharma Cable Cooker, Symposium Ultra and assorted SRA OHIO Class 2.3+ platforms.

  • #2
    Interesting spread (~400mm ?) on the RCA outputs. Without trying it I may prefer outputs together on one side or the other or some way separate from inputs. Cable dressing a pre- or linestage can be, er, frustrating to say the least.


    • #3
      Hmmm. 20db gain with only 41 steps of volume. How large are the steps?


      • JCOConnell
        JCOConnell commented
        Editing a comment
        do the math, approx. 0.5 dB / Step

      • JCOConnell
        JCOConnell commented
        Editing a comment
        Actually, I think the attenuator would have to cover more than 20 dB so the dB per step would be greater.

    • #4
      Good looking pre-amp. More updated and polished look compared to past Allnic's . As mentioned above, 41 volume steps for 20 db gain seems a little short. Curious on the cost of NOS replacement tubes. With the price of equipment seemingly going up & up, slightly sad that $14,900 seems like a good value.
      CJ Gat, CJ Art108a, CJ Tea1 S3 phono, TW Acoustics Raven AC, Tri-Planer MK Vll SE, Vdh Crimson Stradivarius, Exemplar Modded 205(Tube Output & separate power supply), Rockport Avior ll Speakers, Shunyata Everest, Triton V3, Shunyata Sigma Power Cables, Sigma SC's & Python Zitron IC's. Audio Desk Pro LP Cleaner, Stillpoints & Stillpoints Aperture Panels.