Полочная акустика — Edifier R1700BTs

The R1700BTs is an active bookshelf speaker pair from Edifier with Bluetooth and two analogue inputs, priced at USD 229.99 in the US in a brown wood finish. It uses a two-way layout with separate amplifier channels for each driver, DSP and dynamic range control, and it is designed for living rooms, desks and small systems where a pair of powered speakers replaces a separate amplifier.

Key specs that matter

A 4-inch mid-range and bass driver works with a 19 mm (0.75-inch) silk diaphragm tweeter in each cabinet. A Class D amplifier system supplies 66 W RMS, 15 W to every tweeter and 18 W to every mid and bass unit. It covers 52 Hz to 20 kHz, with at least 85 dB A-weighted signal to noise. Bluetooth 5.0 supports Qualcomm aptX HD, and there are two RCA line inputs and a subwoofer output. Input sensitivity is 700 mV for Line In 1, 550 mV for Line In 2 and 400 mV for Bluetooth. The active speaker measures 154 x 254 x 214 mm, the passive one 154 x 254 x 209 mm, and the pair weighs 6.6 kg.

Engineering and use context

The DSP handles the crossover and equalisation, and DRC, or dynamic range control, limits the signal at high volume so that the drivers and amplifiers are protected from overload. Each speaker base is angled at 10 degrees, tilting the drivers up toward the listener when the speakers sit on a low shelf or desk. The cabinets are made of MDF with a wooden finish. The two RCA inputs have different sensitivities, which lets sources of different output levels be connected without one being much louder than the other. aptX HD allows wireless playback at a higher resolution than standard aptX from phones that support it. The speakers are controlled by the supplied remote or by knobs on the side of the right speaker. The subwoofer output passes the bass to an external powered sub, and the brown wood finish on the cabinet sides is the only colour offered.

Pairing

A CD player or streamer connects to one RCA input and a TV or turntable with a phono stage to the other, while phones connect over Bluetooth. In a room of about 20 m2, the 4-inch drivers suit background and moderate listening, and a subwoofer such as the Edifier T5 extends the bass through the sub output.

Alternatives

The Edifier R1855DB is a related active bookshelf pair built around a 4-inch Nomex mid and bass driver, delivering 70 W RMS and adding optical and coaxial connections to Bluetooth 5.1.