AQ AQ M5 Hi-Fi-integrerade förstärkare

AQ M5 Integrated Amplifier — Quiet Class A/B Power

The AQ M5 is a Class A/B integrated stereo amplifier from Acoustique Quality, the Czech audio specialist. With 2 x 50 W into 4 Ω, a toroidal transformer, and a passive aluminum heatsink, this amplifier delivers clean, stable power without disturbing nearby listeners. It is the right choice for users who want honest Hi-Fi sound and reliable all-day operation in a school, café, or meeting room.

What Sets This Amplifier Apart

Two details elevate the M5 above typical small-format integrated amps. A toroidal transformer paired with an aluminum-bottom chassis that doubles as a passive heatsink keeps the amplifier silent even during quiet passages. The unit also stores a programmable power-on state — input, volume, bass, treble, and balance — so it returns to a defined configuration after a power cut.

Output Power and Speaker Compatibility

Output power and load handling determine how confidently an amplifier drives real-world speakers. The M5 is rated for 4 Ω to 16 Ω loads, pairing naturally with most bookshelf monitors.

• Output Power: 2 x 50 W at 4 Ω — headroom for medium rooms and small commercial spaces.
• Speaker Load Range: 4 - 16 Ω — broad compatibility with mainstream Hi-Fi loudspeakers.
• Amplifier Class: Class A/B — balanced compromise between efficiency and musical linearity.

Signal Quality and Noise Performance

Low distortion and a healthy signal-to-noise ratio separate a true Hi-Fi amplifier from a generic stereo unit. The M5 keeps total harmonic distortion below 0.1% across the full audible band and delivers an 86 dB signal-to-noise ratio.

• Total Harmonic Distortion: less than 0.1% across 20 Hz to 20 kHz — clean reproduction at any listening level.
• Signal-to-Noise Ratio: 86 dB — quiet background for low-volume evening listening.
• Crosstalk: -50 dB at 1 kHz — strong stereo separation for accurate imaging.

Connectivity, Controls, and Physical Footprint

Inputs, tone shaping, and physical size decide how easily an amplifier drops into an existing system. The M5 offers four stereo RCA inputs, front-panel tone and balance adjustment, and a compact 190 × 80 × 280 mm chassis.

• Inputs: 4 x RCA (stereo line-level) — connect a CD player, network streamer, phono preamp, and TV.
• Tone Controls: Bass ± 12.5 dB at 100 Hz, Treble ± 12.5 dB at 15 kHz — tailor the sound to the room.
• Dimensions (W x H x D): 190 x 80 x 280 mm — slim profile fits on a shelf, desk, or in an AV rack.
• Weight: 3 kg — light enough for mobile or wall-mounted installations.

Who Should Choose the M5

This amplifier is the right choice for Hi-Fi beginners, small-office integrators, and venue operators who need a dependable stereo amplifier that can run for hours. Four RCA inputs centralize a CD player, network streamer, and TV audio source without cable swapping. The programmable power-on state and built-in protection circuits suit bars, restaurants, and conference rooms.

Acoustique Quality — Three Decades of Czech Hi-Fi

Acoustique Quality (AQ) is a Czech audio company active on the European Hi-Fi scene for 30 years, developing speakers, amplifiers, turntables, and complete audio systems. The M5 reflects the company's practical engineering approach: a compact, reliable amplifier for first-time Hi-Fi buyers and commercial installers.