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Power amplifiers mono — Vtl (Vacuum Tube Logic) MB-185 Series III Signature

Description, images, technical data and specifications

Vtl (Vacuum Tube Logic) MB-185 Series III Signature
Image source — © Vtl (Vacuum Tube Logic)

The VTL-MB185 Series II monoblock tube power amplifier has the same high playback quality and thoughtful balanced design as its "older brother" VTL-MB450 Series II, but it uses 6 6550C lamps and a more compact output transformer, so its power is "only" 220 watts.

Specifications

  • Model name

    MB-185 Series III Signature

  • Input sensitivity (mV)

    1000 - 2000

  • Input impedance (balanced) (Ω)

    45 000

  • Input impedance (single-ended) (Ω)

    45 000

  • Output impedance (balanced) (Ω)

    N/A

  • Output impedance (single-ended) (Ω)

    N/A

  • Max current (A)

    N/A

  • Output power (8Ω) (W)

    Tetrode: 225, Triode: 140

  • Output power (4Ω) (W)

    N/A

  • Gain (dBu)

    N/A

  • Frequency response low +/- 3dB (Hz)

    20

  • Frequency response high +/- 3dB (Hz)

    20 000

  • Signal to Noise Ratio (dB)

    N/A

  • Total Harmonic Distortion + Noise (0% global feedback) (%)

    N/A

  • Total Harmonic Distortion + Noise (100% global feedback) (%)

    N/A

  • Max power consumption (W)

    550

  • Damping factor

    N/A

  • Dimensions (mm)

    470 x 457 x 230

  • Weight (kg)

    45.4

  • Official link

    https://www.vtl.com/products/power-amplifiers/monoblock-amplifiers/mb-185-series-iii-signature-monoblock/

Vtl (Vacuum Tube Logic) MB-125

Vtl (Vacuum Tube Logic) MB-450 Series III Signature

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    The VTL MB-125 monoblock lamp power amplifier is a fairly compact monoblock lamp power amplifier. This model is designed both for installation in a stereo system and for use in a home theater system. The amplifier design uses 2 12AT7 and 4 EL34 lamps. Unlike the more "older" models, there is no automatic lamp offset current adjustment scheme – BIAS adjustments are made manually, independently for each of the lamps.

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