Akai AM-2850 (1979–1981)
The Akai AM-2850 has twin power meters that swing with the music when you fire it up.
Overview
The Akai AM-2850 Integrated Amplifier was built between 1979 and 1981 by Akai Electric Co., Ltd. It is a stereo integrated amp, positioned as a high-performance centerpiece for serious audiophiles who wanted both power and precision. The original price was approximately 998 DM. That wasn't cheap, and it wasn't meant to be.
Owners report a solid, punchy sound with a strong power supply that drives speakers with confidence. It’s not a shy, polite amp; it’s got presence. One StereoNET user put it simply: “This is about as good as AKAI's get!” And that’s no exaggeration—among Akai’s lineup, the AM-2850 stands tall, a culmination of their late-’70s design philosophy. It’s well built, functional, and, according to forum feedback, remarkably easy to service—music to the ears of anyone who’s wrestled with brittle plastics or unrepairable modern gear.
This is not a subtle background player. The volume knob, as one HiFi Engine user noted, has a steep taper. Just a few clicks take you from whisper-quiet to room-filling sound. Some find that unforgiving and others like the directness. It also suggests the electronics might benefit from a refresh after decades of dormancy. Find one that's already been serviced, or do the work yourself, and you get a transparent, dynamic amplifier that punches well above its weight class.
Specifications
| Manufacturer | Akai Electric Co., Ltd. |
| Model | AM-2850 |
| Product Type | Stereo Integrated Amplifier |
| Years of Manufacture | 1979–1981 |
| Power Output (Rated) | 85 watts per channel into 8Ω (stereo) |
| Power Output (Measured) | 105W per channel, both channels driven @ 1kHz into 8 ohms |
| Frequency Response | 10 Hz to 50 kHz |
| Total Harmonic Distortion | 0.03% |
| Damping Factor | 50 |
| Input Sensitivity | 3mV (MM), 30mV (DIN), 150mV (line) |
| Signal to Noise Ratio (Phono) | 80 dB (MM) |
| Signal to Noise Ratio (Line) | 95dB |
| Speaker Load Impedance | 4Ω (minimum) |
| Semiconductors | 43 x transistors, 31 x diodes, 1 x IC |
| Inputs | Phono (MM), Tuner, Aux, Tape 1, Tape 2 |
| Outputs | 2 sets of speaker outputs |
| Dimensions | 440 x 170 x 430mm |
| Weight | 15.7kg |
Key Features
The Meters That Mesmerize
The illuminated power meters glow when the AM-2850 powers up and move in real time with the music. One reviewer called them “yum.” They are calibrated indicators of output, so they show how hard you're driving the system.
Illuminated Volume Dial
The volume knob has an illuminated ring too, so you can see your level setting in a dark room. The rest of the front panel feels deliberate, with no cheap plastics and no flimsy switches.
Built to Last, Easy to Fix
Forum users consistently note that Akai models of this era, including the AM-2850, are “well built and easy to work on.” There are 43 transistors and 31 diodes on serviceable boards, and nothing is surface-mount. If capacitors need replacing or a joint needs resoldering, a competent hobbyist can do it. The modular design and accessible layout mean you don't need a specialist.
Collectibility & Value
As of March 2013, a unit in very good condition, both cosmetically and functionally, sold for $450 AUD after having been serviced and fully checked. Controls operated smoothly, all lights worked, and the amplifier performed as expected. That price puts it below a Marantz or Luxman, but it is a respected performer among those in the know.
The main caveat is the volume control. Multiple sources suggest the taper is aggressive, and one user explicitly notes the electronics may need refreshing. That doesn't mean it's faulty. It means it's vintage. Electrolytic capacitors degrade and pots get noisy, so after 40+ years a recap and cleaning are likely necessary for optimal performance. Since it's considered “easy to work on,” that's a manageable job.
Parts are still out there. HifiShark listed a replacement meter for $36 in 2024 and a service manual for €39 in 2026. Given the praise for its “punchy sound” and strong power delivery, collectors and rebuilders are still chasing this model.
eBay Listings
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Related Models
- Akai AM-2400 (1978)
- Akai AM-2600 (1977)
- Akai AM-2650 (1975)
- Akai AM-32 (1978)
- Akai AM-73 (1973)
- Eico 3150 (1967)
- Fisher CUSTOM-ELECTRA-I (K-14/K-15) (1957)
- Fisher CUSTOM-ELECTRA IV (E33/E44) (1960)
- Heathkit AA-32 (1960s)
- Teac A-120 (1975)