Marantz - PM550DC Solid state integrated amplifier

I propose directly from the ’80s this beautiful Marantz PM510 integrated amplifier in excellent condition. Compact and robust, with the classic Marantz front, phono input, tuner, aux input, tape connections, loudness, bass/treble control, 5-band graphic equalizer working, balance and the possibility to connect two pairs of speakers. This amplifier represents an interesting transitional point for the brand. Dynamic and bright, unlike the older Marantz models, the PM550DC is more open and analytical. The acronym “DC” (Direct Coupled) indicates a design that targets transient speed and a more extended frequency response. The sound is sparkling, with a good presence of high frequencies that makes it ideal for those who seek detail rather than a muffled sound. Don’t expect that soft, booming punch typical of 70s models; here the bass is more precise and “fast.” The 5-band graphic equalizer is a distinctive feature that greatly influences the sound, allowing you to correct possible deficiencies of the speakers or the environment. However, adding too much emphasis can slightly muddy the signal’s transparency. When used in moderation, it is a very powerful tool to customize listening. Cosmetic condition good with normal signs of wear consistent with age. The acronym DC in the name Marantz PM 550 DC means Direct Coupled (continuous coupling, i.e. absence of coupling capacitors in the signal path: which means the internal circuits are designed without audio coupling capacitors along the main signal path). Extended frequency response that allows improving transient speed (the rapidity of response to sound peaks) and extending the frequency response, especially toward deeper and more defined bass. A Phono MM and MC input on an amplifier indicates the presence of an integrated phono preamplifier (or phono stage) designed to accept and correct signals from turntables, differing depending on the cartridge type installed. Please study all photos carefully to avoid misunderstandings. The Marantz will be carefully packed and will travel insured.

Technical specifications

Power output: 65 watts per channel into 8Ω (stereo)
Frequency response: 10 Hz to 50 kHz
Total harmonic distortion: 0.03%
Damping factor: 80
Input sensitivity: 0.28 mV (MC), 2.8 mV (MM), 150 mV (line)
Signal-to-noise ratio: 82 dB (MM), 95 dB (line)
Output: 410 mV (line)
Speaker load impedance: 4Ω (minimum)
Semiconductors: 47 transistors, 45 diodes, 8 integrated circuits
Dimensions: 416 x 117.5 x 329 mm
Weight: 8 kg
Year 1981-1982