• HP 300 SE Tube Preamplifier (Each)
      • HP 300 SE Tube Preamplifier (Each)


      Octave HP 300 SE Tube Preamplifier (Each)



        In stock (0) - 15 - 30 days Available in store: Check availability

        The HP 300 SE is an enhanced version of the HP 300 MKII. The HP 300 SE does not replace the HP 300 MKII, this model extends our range of Preamps. Free Shipping to Continental US only!

        Product description

        The HP 300 SE offers more flexibility in the connections and sonic benefits due to some improvements in the Power Supply and the Output stage of the Line Amplifier. The HP 300 SE has two independent XLR Inputs, three RCA Inputs, one Monitor Output, two RCA Outputs and one XLR Output. The Gain is switchable in three steps, this allow to set the optimum Gain and regulation Ratio depending on the efficiency of the Loudspeaker. The new designed Line Amp has an extremely high Signal to Noise Ratio.

        Noise is not only a characteristic of the tubes, a significant contribution is coming from the mains, respectively the Power supply design of a Preamp. The Power supply of the HP 300 SE consists of the external transformer with optimized isolation characteristic, and the precise ultra low noise Voltage regulators of the main unit. Both systems are match to each and help reducing the Noise of the Lime Amplifier effectively. The Balanced Output is realized with a highly symmetrical Output Transformer. The Transformer offers the possibility to connect or disconnect the Ground connection to the Power Amplifier.

        The feature helps to reduce disturbing mains induced currents that usually flow in the Ground of the Signal connection. Both Outputs offer very low Output Resistances. Connecting cables up to 5 - 10 meter is without negative influence. A helpful feature in modern Hifi combinations is the Home Theatre Bypass Function. The HP 300 SE offers this feature, with the additional possibility to select the Bypass Input from a RCA Input to a XLR Input. The Monitor Output is buffered and can be used to drive an external headphone Amp, the Analog Input of a Computer or similar. Phono MC is available optional.

        Octave HP 300 SE Tube Preamplifier User's Manual


        Basic Model

        HP 300 SE, optional: Phono MC


        Aluminum silver or Aluminum black

        Gain High

        25 dB = 18,5

        Gain Med

        19 dB = 8,8

        Gain Low

        12 dB = 4

        Frequency Response Gain High

        10 Hz - 200 kHz - 1,5 dB

        Total Harmonic Distortion Gain High


        S / N Ratio : Gain High

        - 92 dB

        S / N Ratio Gain Low

        -108 dB

        Left/Right Crosstalk

        90 dB 1 kHz

        Input to Input Crosstalk

        100 dB 1 kHz

        Input Impedance

        100 kOhm

        Output Impedance

        50 Ohm cinch; 150 Ohm XLR

        Channel Balance

        0.5 dB - 70 dB


        Inputs : 3 x Cinch, 2 x XLR, 1 x Phono Option

        Outputs : 2 x Cinch, 1 x XLR, 1 x Monitor


        HT Bypass, Sym. Inputs and Outputs, Monitor Out



        RIAA-Equalization Accuracy

        0,3 dB 15 Hz - 20 kHz

        Corner Frequency Subsonic Filter

        15 Hz / - 3 dB

        Input Impedance

        30 - 1000 Ohm

        Input Sensitivity

        0.2 mV / 0.7 mV

        Gain Low

        58 dB

        Signal-to-Noise Ratio (weighted)

        - 75 dB

        General Facts


        Power Consumption

        35 W

        Weight with Power Supply

        12 kg

        Standard Accessories

        Power cord, IR-Remote Control


        W x H x D = 438 x 77 x 410 mm

        Dimensions Power Supply

        W x H x D = 110 x 80 x 250 mm

        Contact us to inquire how you can finance your purchase through our partner, Synchrony.

        Available in store


        Forgot your password?

        • All your orders and returns in one place
        • The ordering process is even faster
        • Your shopping cart stored, always and everywhere