AD-7300PA+ is a 7 channel Hi-Fi amplifier which is specially designed to match the AD-7300HD processor. It is a high end & high power amplifier with multi-protection including overheat, overload, overcurent, overvoltage protection, so as to offer reliable performancce for home theater system. 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.

AD-7300PA+

7 Channel Hi-Fi Amplifier.

Build Your Own Home Theater

Multiple Protections

Adopts five-fold protection of overvoltage, overheating, overload, overcurrent and short circuit to ensure that the machine and the speakers are working normally.

HD Audio and Video Decoder

High-fidelity sound effects and excellent sound quality, powerful, practical and convenient High-definition decoding post-stage high-power amplifier.

Audiophile Output Interface

The input part of the circuit adopts optional balanced and unbalanced input, low-noise double differential amplifier circuit and mirror constant current source load, which can improve the signal-to-noise ratio of the whole machine and make it more suitable for the high sound pressure dynamic of home theater. Large, strong driving force, high slew rate, temperature compensation circuit and DC servo circuit are designed at the last stage of the circuit, and a negative feedback circuit is designed to ensure the stability of the machine.

Hi-Fi Circuit Design

It completely adopts the high-fidelity circuit structure of the independent 7-channel modular separation element power amplifier unit circuit board. The HI-FI circuit used in each channel and the process, layout, and materials used are almost the same, among which the front and left channels are exposed radiators, which are not only larger in size, but also have a larger current in the power amplifier stage due to the quiescent currents at all levels of the circuit. The technical basis of power output such as 7 channels.

High Power Transistor

3 pairs of famous ON Semiconductor NJW0302G/NJWO281G audio dedicated high-power transistors with a three-stage Darlington circuit form a push-pull output, providing a powerful power of 310W and 8 ohms per channel. The whole machine has a total of 7 channels, and 42 NJW0302G/NJW0281G high-power tubes are really powerful.

External Design

The cabinet is all black aluminium with acrylic board on the front.

The pointer voltmeter is lake-blue, indicating its beauty and elegance.

Function of 7 Channels Power Amplifier:

Features:

• High power switch-mode power supply
• 7-way unbalanced inputs and 7-way balanced inputs
• Manual or trigger power on/ standby
• Acrylic lake-blue ammeter
• DIM control button on front panel
• Trigger port on rear panel

Specifications:

• Model: AD-7300PA
• Rated output power:
• 515W RMS(4Ω, THD=3%, 1kHz)
• 310W RMS(8Ω, THD=3%, 1kHz, )
• Rated impedance: 8Ω
• Gain: 29.5dB
• THD: ≤0.09% (1kHz, normal working status)
• SNR: ≥100dB (A-weighted, analog direct)
• Frequency response: 20Hz-50kHz (+1/-3 dB, analog through)
• Gross Weight: 26.3kg
• Power supply voltage: ~110V-115V (60Hz) /~220V-230V (50Hz)
• Dimension: 440x197x445mm (WxHxD)
• Output power per channel:
• 15W RMS(4Ω, THD=3%,1kHz)
• 10W RMS(8Ω, THD=3%,1kHz)
• Material: Aluminum alloy
• Channel: 7
• Accessories: manual, certificate, power cord, signal cable