ROTEL INTEGRATED AMP RA-840BX4 MM/MC PHONO STAGE SELECTOR 50W
RM890.00
The Rotel RA-840BX4 is an iconic, overachieving budget integrated amplifier released in the late 1980s. Emerging from Rotel’s famous “Balanced Design Concept,” this iteration stripped away useless features like tone controls to create a minimalist, straight-line audio path aimed squarely at purists. It is particularly revered for its high-current capability and a robust dual-concentric volume pot, allowing it to drive difficult speaker loads with surprising authoritative grip.
Technical Specifications
| Feature | Specification |
| Power Output | 50 Watts per channel into 8 $\Omega$ (Stereo) |
| Frequency Response | 10 Hz to 100 kHz (+1.0 dB, -3.0 dB) |
| Total Harmonic Distortion | 0.03% at rated power |
| Damping Factor | 100 (20 Hz to 20 kHz, 8 $\Omega$) |
| Input Sensitivity | Phono MM: 2.5mV / 47k $\Omega$; Phono MC: 250$\mu$V / 180 $\Omega$; Line: 150mV / 24k $\Omega$ |
| Signal to Noise Ratio | Phono MM: 80 dB; Phono MC: 70 dB; Line: 100 dB |
| Speaker Terminals | Dual sets: “Direct” (straight-wire path) and “Remote” (switched) |
| Dimensions (W x H x D) | 430 mm x 91 mm x 316 mm (17″ x 3.6″ x 12.4″) |
| Weight | 7.2 kg (15.8 lbs) |
Review
The Rotel RA-840BX4 punches far above its weight class, delivering an incredibly muscular, fast, and transparent soundstage that leaves its contemporary 1980s competitors sounding muddy by comparison. By diverting internal manufacturing costs away from bells and whistles and funneling them directly into a massive power supply and high-grade internal components, Rotel created a budget amplifier with immense dynamic headroom. The bass response is lean, remarkably taut, and agile, while the midrange and high frequencies are presented with a forward, detailed accuracy that brings acoustic instruments and vocals vividly to life.
Vinyl enthusiasts will find a particular treasure in the built-in phono stage. Unlike the afterthought circuits found in most modern integrated amps, the RA-840BX4 features a dedicated, front-panel switchable Moving Magnet (MM) and Moving Coil (MC) preamplifier that operates with vanishingly low noise. When hooked up via the “Direct” speaker outputs, which bypasses all unnecessary internal switches to protect signal integrity, it achieves an effortless musical fluidity. It remains a definitive giant-killer on the vintage market, perfect for anyone seeking uncompromised, purist analog sound on a budget.
