Интегральные усилители — Denon PMA-900HNE

The PMA-900HNE is a stereo integrated network amplifier from Denon that combines a discrete power stage, a phono input and HEOS Built-in streaming in one chassis. It was designed for listeners who want to run a turntable, a TV, digital sources and online music services from a single box. The US price is USD 1,049, and it comes in silver or black with an aluminium front panel and a low-noise OLED display.

Key specs that matter

Rated output is 50 W per channel into 8 ohm across 20 Hz to 20 kHz at 0.07 percent distortion, and 85 W per channel into 4 ohm at 1 kHz. Distortion falls to 0.01 percent at 3 dB below rated power. The phono stage accepts MM cartridges at 2.5 mV into 47 kohm and MC types at 200 microvolts into 100 ohm, with signal to noise of 86 dB and 71 dB. Line inputs reach 105 dB. Frequency response extends from 5 Hz to 100 kHz. Digital inputs are three optical and one coaxial, taking PCM to 192 kHz and 24 bit, plus a USB-A port. The unit measures 434 x 376 x 131 mm and weighs 8.3 kg, with a power draw of 200 W.

Engineering and use context

Its discrete power section relies on Denon Advanced High Current single push-pull circuitry with Darlington transistors, adapted from the brand's higher models and fed by a high-current dynamic power supply. Audio and control circuits draw on individually wound coils of the main power transformer, and the Signal Level Divided Construction chassis keeps low-level signals apart from power sections. Volume is set electronically with variable gain while the knob keeps an analogue feel. HEOS covers Wi-Fi on 2.4 and 5 GHz, wired Ethernet, AirPlay 2 and Bluetooth 5.4, along with Spotify Connect, Tidal, Amazon Music, TuneIn and other services. Network and USB playback handle FLAC and WAV at the same resolution as the digital inputs, ALAC and DSD at 2.8 and 5.6 MHz. The unit also answers to Alexa, Google Assistant and Siri. Tone controls give 8 dB of adjustment at 100 Hz and 10 kHz, and Source Direct bypasses them. A digital signal from a TV switches the amplifier on automatically.

Pairing

The amplifier drives speaker loads of 4 to 16 ohm on the A or B terminals, or 8 to 16 ohm when both pairs run together. A subwoofer output filtered at 150 Hz helps with small bookshelf models, and pre-out and main-in sockets allow an external power amplifier. A headphone jack is also fitted. The RC-1246 remote can learn TV commands.

Alternatives

The Denon PMA-1700NE is a larger integrated amplifier in the range without built-in network streaming.