Quad 405 (mk1)
Brand: Quad
The Quad 405 (mk1) is an integrated amplifier designed and manufactured by Quad Electronics in England during the late 1970s. It is part of Quad's well-known 400 Series, which includes other iconic audio components such as the Quad 2805 and Quad 22 preamplifiers.The Quad 405 (mk1) employs a single-ended (SE) topology, instead of the more common push-pull (PP) configuration. This design offers a more straightforward signal path and contributes to the amplifier's detailed, revealing sound. It also boasts a highly reputable power supply section, utilizing a dual voltage multiplier and high-quality capacitors that supply the large toroidal transformer.The amplifier's rated output power is 30 watts per channel, with a THD (total harmonic distortion) of less than 0.1% at full power. Its frequency response spans from 10Hz to 50kHz (-3dB). Its input sensitively ranges from 150mV to 500mV, making it suitable for a wide variety of sources. The Quad 405 (mk1) has balanced sets of input and output terminals, as well as high-quality gold-plated binding posts for speaker connections.The amplifier's front panel features a green LED to indicate the unit's standby status, as well as a white LED for signal level monitoring. The 405 (mk1) also has an on/off switch, which allows users to conserve power and prolong the life of the transformer. Additionally, an AC power socket is located on the rear panel.The Quad 405 (mk1) is known for its natural, lifelike sound reproduction, with a distinctive midrange clarity and mesmerizing microlevel details. It is often praised for its transient response and stunning dynamics, which create a captivating listening experience. Its vintage design, outstanding technical specifications, and exceptional performance have made the Quad 405 (mk1) a much-loved icon in the high-end audio community.
- Power Output: 100W into 8Ω (stereo)
- Frequency Response: 20Hz to 20kHz
- Distortion: 0.05%
- Speaker Impedance: 4 to 16Ω
- Input Sensitivity: 0.5V
- Signal to Noise Ratio: 95dB
- Dimensions: 115 x 340.5 x 195 mm
- Weight: 9 kg
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