No global feedback for fast and lifelike musicality
“There was also outstanding image focus from left to right and from front to back, making performers’ positions onstage easy to discern […] The 870A’s re-creation of the spaces around musicians was a product of its topnotch reproduction of resolution and detail.”
– Doug Schneider, SoundStage!
Design features
| Specifications | |
|---|---|
| Output Power at 8Ω | 300 W per channel |
| Output Power at 4Ω | 600 W per channel |
| Output Power - Bridged Mono at 8Ω | 1200 W |
| Input Sensitivity | 1400mV RMS |
| Input Impedance | 47,500Ω |
| Gain | 31dB |
| Signal-to-noise Ratio | 106dB @ full power |
| Frequency response (full range) | 10Hz - 200kHz +0/-3.0dB |
| Crosstalk @ 1kHz | -105dB |
| THD (20Hz - 20kHz @ 1 W) | 0.015% |
| THD (20Hz - 20kHz @ 300 W) | 0.04% |
| Intermodulation distortion | 0.006% |
| Shipping weight | 98 lb / 44 kg |
| Dimensions (width x height x depth) | 18.75 x 7.5 x 17.5 in |