Qualiton 300B

The Qualiton 300B is an integrated stereo amplifier with 2 x 25 Watts output power, built around the captivating sound character of 300B power tubes. This amplifier harmoniously blends our classic heritage with modern details: it features refined vacuum t

PrisNOK124 990,00 inkl. mva.
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Overview

Link:https://qualiton.eu/models/300b/
The Qualiton 300B is an integrated stereo amplifier with 2 x 25 Watts output power, built around the captivating sound character of 300B power tubes. This amplifier harmoniously blends our classic heritage with modern details: it features refined vacuum tube circuits, which we have enhanced with several additional functionalities. In shaping the overall sound character, our primary goal was to move away from the pronounced coloration often associated with amplifiers utilizing the 300B tube. Instead, we envisioned a smooth, musical and balanced vacuum tube amplifier that excels across the entire audio frequency range.
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Powered by 300B

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Custom Output Transformers

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Custom Power Transformer

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Automatic Bias System

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Filament Soft Start

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Highly Optimized Layout

Pragmatic Audio Design

At Qualiton, we adhere to a pragmatic approach in tube amplifier design. We believe that a truly exceptional amplifier should:

  • Be compatible with a wide range of loudspeakers.
  • Exhibit a Total Harmonic Distortion (THD) of less than 0.5% across the entire power spectrum, from milliwatts to rated power, spanning 20 Hz to 20 kHz.
  • Maintain a flat THD vs. Frequency plot when measured at a fixed output power.
  • Deliver fast and controlled transients throughout the audio range, which goes hand in hand with the frequency response being wide and flat.
  • Operate at low noise levels with an exceptional signal-to-noise ratio.
  • Combine thoughtful design, robust technical parameters, and exceptional sound quality.

In the preamplifier and driver sections, the 12AX7 and 12AT7 tubes play a crucial role in achieving these goals. Furthermore, their DC-stabilized filament supply and circuits with low offset and stable DC operating points ensure resilience against parameter variations.

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Relay-Controlled Input Selection

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Relay-Controlled Volume

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Multifunction Control Knob

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Multifunction Remote Control

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Status Display

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Aesthetics

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Protective Features

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Special Components

Tech Specs

Electrical

Rated Output Power
2 x 25 Watts @ 4 or 8 Ohms
Output Load Impedance
4 or 8 Ohms
Number of Channels
2
Frequency Response
5 Hz - 85 kHz (-3 dB, 1 Watt)
15 Hz - 70 kHz (-3 dB, 25 Watts)
Total Harmonic Distortion
< 0.5 % across the entire power spectrum,
from milliwatts to rated output,
spanning 20 Hz to 20 kHz.
Rated Power Bandwidth
20 Hz - 20 kHz
Signal-to-Noise Ratio
> 105 dB below rated output
20 Hz - 22 kHz bandwidth, without weighting filter

> 110 dB below rated output
with A-weighting filter
Number of Outputs
2 Unbalanced POWER OUT
1 Unbalanced SUB OUT
Number of Inputs
4 Unbalanced STEREO IN
1 Balanced STEREO IN
Input Sensitivity
(for rated output)
0.65 Volts Unbalanced
0.65 Volts Balanced
Input Impedance
10 000 Ohms Unbalanced
20 000 Ohms Balanced
Gain
+23.75 dB @ 4 Ohms
+26.75 dB @ 8 Ohms

General

Vacuum Tubes
2 x 12AX7EH Gold
4 x 12AT7EH Gold
4 x 300B EH
Remote Control
Stand-By
Volume
Mute
Input Selection
Status Display Brightness
Power Requirement
200 W idle
460 W max
1 W stand-by
Weight
28 kg
Dimensions
42.5 x 50 x 21 cm
In the Box
  • 300B Integrated Amplifier
  • 2 x 12AX7EH Gold vacuum tubes
  • 4 x 12AT7EH Gold vacuum tubes
  • 4 x 300B EH vacuum tubes
  • Remote Control
  • Standard Mains Cable
  • PH2 Phillips Screwdriver
  • Pair of Gloves
  • User's Manual

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