Интегральные усилители — ToneWinner AD-89D

The AD-89D from Guangzhou Tonewinner Electronics is a four-in-one unit that joins a CD transport, a digital player, a decoder and a two-channel amplifier inside one black chassis. It is meant for listeners who still play discs and want file playback and TV sound from the same box without matching separate components.

Key specs that matter

Output is 130 W per channel into a rated 8 ohm load at 1 kHz with 1% THD. Measured with the analog signal passed straight through, THD stays at or below 0.05% and signal-to-noise ratio reaches at least 95 dB A-weighted, while frequency response runs from 10 Hz to 50 kHz within +1/-3 dB. Gain is quoted as at least 41 dB. Maximum power draw is 450 W into 8 ohms, and the unit accepts either 110 to 115 V at 60 Hz or 220 to 230 V at 50 Hz. Its case is 430 mm wide, 397 mm deep and 151 mm high. Without packaging it weighs 12.7 kg, rising to 14.8 kg packed in a 546 x 483 x 232 mm carton.

Engineering and use context

Tonewinner describes the amplifier as a low-distortion high-speed super Class A circuit. Its supply is built around a 350 VA audiophile toroidal transformer and eight custom capacitors holding 40,000 uF, with custom high-precision matched high-power output devices chosen to drive demanding speakers. Power supply and storage, input and decoding, and the two channels are kept in separate chambers to cut internal signal interference. The disc drive is a selected custom mechanism, and a thick metal shockproof base under the chassis steadies the optical pickup while reading. Tonewinner adds that the drive was chosen for uniform rotation speed and strong disc reading. Beyond discs, a 128 GB USB flash drive or TF card can be played in APE, FLAC, WAV, MP3 and WMA formats, and a USB Audio port for a computer handles PCM at 48 kHz and 24 bit.

Pairing

Television sound reaches the AD-89D over HDMI ARC, while its SW-OUT socket feeds a powered subwoofer for 2.1 playback. The maker stresses that no complicated matching of components is needed with this all-in-one design. Front and rear stages are separated, so taking out the U-shaped link allows the unit to serve purely as a preamplifier or purely as a power amplifier with other electronics.

Alternatives

The Tonewinner AD-86D is an integrated amplifier without a CD mechanism, rated at 120 W per channel.