Diagram Note: All connections should be made before plugging the unit into AC power.
A: The manual explicitly states: "Use speakers with an impedance of 8 ohms or higher." Using 4-ohm speakers will cause the receiver to overheat and shut down. If you must, use only one pair (not A+B) and keep volume below 40%.
Note: Do not mix old and new batteries or different battery types. sony str k670p manual
While the original Sony STR K670P manual covers basic care, experienced users have discovered additional longevity tips:
Before diving into operations, let’s establish what this receiver is capable of. Understanding the specs helps you interpret the manual’s warnings and limitations. Diagram Note: All connections should be made before
| Specification | Detail | | --- | --- | | Model | Sony STR K670P | | Type | Stereo FM/AM Receiver | | Power Output | 100 Watts per channel (RMS at 8 ohms, 1kHz, 10% THD) | | Frequency Response | 20Hz – 20kHz | | Inputs | CD, Tape (Play/Rec), Video/Aux, Phono (MM) | | Outputs | 2 Speaker pairs (A/B), Tape Rec Out, Headphone (6.35mm) | | Tuning | Digital synthesized PLL (30 presets) | | Surround Modes | Dolby Pro Logic (via rear output), 3D Phantom, Hall, Simulated Stereo | | Dimensions | 430 x 145 x 315 mm | | Weight | Approximately 6.5 kg |
Key takeaway from the manual: The Phono input is for Moving Magnet (MM) cartridges only. Using a Moving Coil (MC) cartridge without a step-up transformer will result in very low volume. Note: Do not mix old and new batteries
The STR K670P was one of the first affordable receivers with built-in Dolby Pro Logic.
As of 2025, Sony does not host the STR K670P manual on its official support site. However, multiple reputable archives have scanned copies.