The Pioneer GR-870 is a sophisticated graphic equalizer designed for audio enthusiasts looking to enhance their listening experience. It features a 10-band equalization system, allowing users to adjust frequencies from 31.25 Hz to 16 kHz. This model supports a range of inputs and outputs, including RCA connections for both stereo and mono operations. The ensuring channel separation enhances audio clarity, which is particularly noticeable in more complex sound mixes. The device is equipped with an LED level meter that provides visual feedback during use. Circuitry is designed to minimize noise, which helps maintain a clean signal path. Its layout is user-friendly, with clearly marked sliders for ease of use. The construction is typical of Pioneer products of its era, featuring a sturdy chassis and traditional knobs for precise adjustments.
