Fisher CA 2310 Amplifier built like a tank with a huge transformer and two large capacitors. 14,5 Kg. 70 w - 8 ohm..Brutally good sound. Technically fully functional sound on both channels without noises and crackles. tested on all inputs. Good phono mod for vinyl lovers. Optical with major signs of use On the front panel and cover. The amplifier had one scratch, I tried to fix it but it didn't work, see the pictures!! The Fisher Studio-Standard CA-2310 is a vintage integrated stereo amplifier produced between 1977 and 1979. Known for its solid build quality and timeless, functional design, it was manufactured after Sanyo acquired the Fisher brand, aiming to maintain a reputation for high-quality audio in the European and American markets. Performance and Sound Quality Solid Construction: Users and experts note that the build quality is better than commonly expected for the "Studio-Standard" era, weighing approximately 14.5 kg (31.9 lbs). Power Output: 70W per channel into 8Ω (Stereo). Frequency Response: 20Hz to 20kHz. Inputs: Includes two Phono (MM) inputs, Tuner, AUX, and two Tape Monitor loops. Tone Controls: Features switchable sound controls with adjustable operating frequencies, plus muting and loudness functions. Speaker Connections: Support for up to three pairs of loudspeakers. Power Delivery: It is a powerful unit for its time, delivering 70 watts per channel into 8Ω. Some European specifications list it as capable of 100 watts sinus at 4Ω. Sound Profile: While detailed modern audiophile reviews are scarce, it is described as having a "beautiful sound" and being a reliable "end stage" with clear audio reproduction. Its THD (Total Harmonic Distortion) is rated low at 0.05%.