Интегральные усилители — ToneWinner AD-86D

The AD-86D is a stereo integrated model made in Guangzhou by Tonewinner Electronics, and it folds a digital decoder, a media player and an HDMI ARC link into one chassis. Tonewinner places it as a middle grade model of its newer Hi-Fi generation, aimed at younger listeners who want a modern-looking box in the living room.

Key specs that matter

Rated output is 120 W per channel into 8 ohms at 1 kHz with 1% THD. The maker specifies A-weighted SNR above 96 dB, THD under 0.05% at 1 kHz in normal operation, and a frequency range of 20 Hz to 60 kHz within +1/-3 dB. Gain is listed as 42 dB, input impedance as 10 kohm, and the amplifier is matched to loads of 4 to 8 ohms. Unit consumption is given as 400 W into 8 ohms, and the supply runs on 220 V at 50 Hz.

Engineering and use context

Digital connections cover one USB Audio port for a computer, one optical input and three coaxial inputs, alongside three analog inputs. A 128 GB USB disk or TF card can be played directly in APE, FLAC, WAV, MP3 and WMA formats, and a wireless link plus the brand's own app handle streaming and control. Conversion is done by an AD1955 DAC chip that accepts PCM data up to 24 bit and 192 kHz and is specified for about 120 dB SNR/DNR at a 48 kHz sample rate, A-weighted. The preamplifier stage uses nine TI OPA1678 op-amps in a fully balanced arrangement, a part rated by TI for 4.5 nV per root hertz noise density and 0.0001% distortion, while the output stage relies on differential circuits and eight TTC5200/TTA1943 Toshiba transistors. A common-base stage with temperature compensation and current expansion drives the output, and a long servo circuit with measured negative feedback keeps operation stable. Power comes from a 400 VA toroidal transformer backed by six custom filter capacitors totalling 57,400 uF. Supply, input, storage and each amplifying channel sit in separate chambers to limit stray electromagnetic interference. The aluminium alloy case is anodized in black or silver, with a V-shaped curved fascia and a lake-blue display, and the package holds a remote control, a cable and a certificate.

Pairing

An HDMI ARC socket connects the AD-86D to a television, and a subwoofer output turns a stereo pair into a 2.1 layout. The PRE OUT and AMP IN jacks are joined by a shorting link, so removing it lets the unit act as a separate preamplifier or as a power amplifier fed from an outside preamp.

Alternatives

The Tonewinner AD-99D is a larger integrated model from the same maker, rated at 180 W per channel from a 550 VA transformer.