audio stereo amplifier
audio stereo amplifier
audio stereo amplifier
audio stereo amplifier
audio stereo amplifier

Tonewinner manufactures AD-2PRO 400W Hi-Fi stereo integrated amplifier

AD-2PRO is a Class A integrated amplifier with optical, coaxial, balanced, RCA, MM/MC phono inputs and subwoofer balance/unbalance outputs. It supports one-click switch among Class A, Class AB and Auto modes. As a top 10 audio brand in China, Tonewinner has 30+ years experience in designing and manufacturing acoustic products. As an original supplier, Tonewinner always warmly welcomes distributors, partners and customers around the world.

  • Model

  • Channels

  • Power

  • G.W.

  • THD










Hi-end Class A integrated amplifier

Balanced Amplifying Circuit

It adopts symmetrical, balanced, differential circuit and the sound is transmitted through BTL output configuration. This circuit helps to bring better sound with lower distortion and more purity.

Long Term Pursue

30+ years pursue in AD series amplifier

New version, new chips

DSD digital decoding

ES9038 chip offers up to 22MHz signal lossless decoding and Hi-Fi sound.


Balanced Input

XLR audio ports

Less interference

Low distortion

Phono port, classic appreciation.

It supports MM/MC cartridges for easy compatibility.

The rich sound will take you back to the classic time.

Subwoofer Output

XLR/ RCA output ports connected to an active

subwoofer will truly meet the taste of bass fans. 

Bi-wiring Connection

It supports standard connection and bi-wiring connection modes. When it's in the bi-wiring connection mode, treble and mid-bass are separately connected with the amplifier so as to reduce interference and improve sound effect.

Class A/ AB/ AUTO Modes

It has three built-in circuit modes: Class A, Class AB and auto-switch between Class A & AB, which is one of the symbols of our high-end Hi-Fi amplifier. Use the remote control to achieve one-click switch among these modes.

High power & one-click switch

200W for each channel to drive most famous speakers. Use the remote control to achieve one-click switch between integration mode and purely amplifier mode.

Decoding Chip ES9038

This chip enables it to decode multiple audio formats.

DSD decoding: DSD512, 256, 128, 64

PCM sample rate: 32bit/768kHz

Dynamic range: 129dB

Distortion: -120dB

High Sample Rate for High Quality Recording


Operational Amplifier

It adopts 9 OPA1656 optional amplifiers form Texas Instrumnets to form full balance amplification, bringing analytical and warm sound.

2 way optical inputs, 1 way coaxial input

and DSD lossless decoding.

High Power Transistor

A total of 24 Toshiba transistors 1941/5198 for bright treble, bloat mid-range and sonorous bass. 

Volume Controller Chip

It adopts NJW 1195A volume controller chip with -118dB low noise and 0.5dB adjustment step. Lower distortion and better channel separation.

High Capacitance

A total of 16 capacitors to offer 128,800μF 

capacitance for powerful driving.

High Power Transformer

860W toroidal transformer for strong power driving.

Wide Voltage Design

As an amplifier specially designed for audio users worldwide, it adopts its patented wide voltage design handling AC 110V and AC 220V.  


Multi-chamber Layout

The areas of input, power storage, power supply

and amplifying are separated into chambers so as

to reduce the interference

of free electromagnetic wave. 

Remote Control Introduction

More Details

Black and white design.

Sleek linear.







SNR: ≥108dB (A-weighted, analog direct)

Frequency response: 15Hz-100kHz (+1/-3 dB, analog diect) 

THD: ≤0.05% (1kHz,normal working) 

Output power: 200W Rms/8Ω (THD=1%, 1ch driven, 1kHz)

Rated impedance: 8 ohms

Gain: 40dB±1dB

Class A static power consumption: 260W-320W

Class AB static power consumption: 70W-110W

Standby powr consumption: <0.5W

N.W: 35.9kg       G.W: 40kg

Power supply voltage: ~110(60Hz)/~220V(50Hz)

Dimension: 444x460x254mm (WxDxH)

Support Audio Formats

Lossless formats: DSD, AIFF, ALAC, APE, DIFF, DSF, FALC, OGG, WAV

Compressed formats: AAC, MP3, WMA

Others: PCM




≤0.01%(1kHz,normal working)
≥108dB(A weighted)
Standby Consumption
Power Output
39dB ±1dB
Power Consumption
260W-320W(Calss A);
70W-110W(Class AB)
living room,theater&Karaoke room,demo room,bedroom,meeting room.
manual, certification, power cord, optical cable, remote control.


AD-2PRO is a Class A integrated Hi-Fi amplifier with optical, coaxial, balance, RCA, MM/MC inputs. This is an amplifier with subwoofer balance/unbalance outputs. And this amplifier stereo Hi-Fi amp supports one-click switch among Class A, Class AB and Auto mode. 



Function of Hi-Fi stereo amplifier


  • 1 channel coaxial and 2 channel optical digital inputs; support PCM and DSD decoding.
  • 2 way unbalanced and 1 way balanced inputs.
  • Manual power-on/standby, trigger power-on/standby.
  • Static bias mode selections: Class A/Class AB/AUTO modes.
  • Speaker output module selections: group A/ group B/ groupA+B.
  • Standby, working and protection modes display on front panel.
  • AC 110V/220V power supply automatic compatibility.
  • 1 unbalanced and 1 balanced bass outputs.
  • MM /MC phono input.


Features overviwes
  • Adopt fully balanced, fully symmetrical, differential input to differential BTL power output Class A power amplifier circuit.
  • High conversion rate, low harmonic distortion, low noise, good transient response, wide frequency response range.
  • The amplifying part adopts a common base circuit to improve the gain and high-frequency response.
  • The output part adopts a three-stage Darlington transistors.
  • High voltage for amplifying part and slight low voltage for output part to futher improve the performance of the whole machine.
  • 860W high quality transformer, up to 120,000 capacitance.
  • 200W/8Ω high power output for each channel to drive all kinds of speakers.
  • Independent internal layout to minimize the influence of left and right channel signals.
  • Protections: overcurrent, overheat, short cut, etc.
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Leave A Message
If you’re interested in our products or have any suggestions, please leave a message here, and we’ll contact you as soon as possible.