Pioneer is a Japanese company that designs and manufactures electronic products.

Pioneer

The Pioneer SX-D7000 was introduced in 1980 as part of Pioneer's transition to digital technology in audio receivers. It distinguished itself from its predecessor, the SX-3900, by replacing analog knobs with push buttons and utilizing Fluroscan technology for its power meter and digital tuning display. The receiver features a modern aesthetic with a symmetrical layout that enhances its visual appeal. With a power rating of 120 watts per channel and a total harmonic distortion of just 0.005%, the SX-D7000 delivers high-quality audio performance. It is equipped with sliders for treble and bass control, along with an adaptor switch to integrate signal processors such as graphic equalizers. This model also includes a C speaker switch, tone on/off control, a display dimmer, and a second phono input. Unique for its time, the SX-D7000 features a preamp section compatible with both moving magnet and moving coil cartridges, easily switchable via a button near the volume knob. The preamp boosts gain by 20dB and adjusts impedance to 100 ohms when set to the MC position. The receiver employs a non-switching DC power amp design and a quartz PLL synthesizer tuner with memory for six FM and six AM stations, achieving effortless tuning. It also houses a high gain FET phono equalizer and an attenuator type master volume control. The DC power configuration minimizes distortion, allowing for improved sonic fidelity. Pioneer's proprietary Vari-Bias circuit enhances performance by optimizing bias control for the power transistors based on signal amplitude. The SX-D7000 features three power transformers, including a toroidal transformer for the power amp. It includes three speaker outputs, two phono inputs, and an auxiliary input, along with an AM stereo output. As the SX-D7000 marked a shift from silver-faced designs to more cost-effective black plastic components in the audio market, it remains a valued model recognized for its performance, often available at reasonable prices.

SX-D 7000

by Pioneer

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