Alieno Amplifier 100 LTD

ALIENO 100 LTD

With the same innovative technology used for the progenitor ALIENO 250 LTD, also ALIENO 100 LTD is the first and unique tube amplifier with two 2A3s that delivers 100 Watts per channel.

ALIENO 100 LTD is an OTL-OCL (Output Transformer Less & Output Capacitor Less), Single Ended, pure Class A. ALIENO 100 LTD is not a hybrid tube & transistor amplifier.

The LTD exclusive “Loudspeaker Tube Direct” technology allows the tubes to be used exclusively for the amplifier circuits, while the transistors are used exclusively for the power supply and protection circuits.  No hybrid tube/transistor sound!

In addition to the two 2A3 amplifier tubes, ALIENO 100 LTD differs from the more powerful ALIENO 250 LTD for the single cabinet that contains both the power supply and the amplifier sections. For all the other choices of circuits and components, ALIENO 100 LTD adopts the same “no compromise” construction philosophy of ALIENO 250 LTD.

ALIENO 100 LTD specifications

  • Power Output: @ 3 Ohms – 100 Wrms continuous per channel.
  • Distortion: typically 0,1%, max 0,5% from 20 to 20.000 Hz.
  • Frequency Response: ± 0,5dB from 5 to 100.000 Hz.
  • Internal bandwidth: > 1 MHz.
  • Gain 22 dB.
  • Input sensitivity 2,5 Vrms
  • Input impedance 100 K Ohms (irrelevant capacity).
  • Input connectors RCA and XLR
  • Optimal Load Impedance: 2 − 8 Ohms.
  • Signal to Noise Ratio: > 95 dB.
  • Damping Factor: > 60
  • Overall Negative Feedback: totally absent Negative Feedback.
  • Slew rate > 200Volts/microseconds
  • Output current > 55 Amps peak per channel
  • Tubes required per channel:
    • one ECC82, pre-ampli and driver tube;
    • one KT150, stabilizer tube;
    • one 2A3, output power tube.
  • Tubes management: Constant optimization of all tube operating parameters, including bias, over-voltage and over-current protection, along with real-time output impedance management.
    Auto adjustment of balance differences between each tube in the circuit. Imprecisely matched tubes or individual tube lifecycle issues are wholly compensated by regulation circuits.
  • Protection features: Thermal threshold independent for each channel.
    One AC main fuse and five fuses on each power supply sector.
    Protection for wrong connection between power supply unit and amplifier unit.
    Double timer for a gradual loading of the charge on AC power grid.
    Each protection has its independent warning led, including the fuses.
    On/Off “thump” eliminated by delay relay transient protection.
    Infallible loudspeaker protection circuitry.
  • Dimensions:
    Cm. 45 x 50 x 33; inches 17,7″ x 19,7″ x 13″ (W x D x H).
    Weight: 45 Kg net − 99 lb.