Signal to noise ratio: (A weighting) ≥96dB
Frequency response: 10Hz-60KHz (+1 dB -3dB)
Distortion degree: ≤0.038%
Output power (RMS): 80W×2 (8Ω) 120W×2 (4Ω)
Matching impedance: 8Ω
Power consumption: 240W±10%
Machine size: 444 (width) × 413 (deep) × 66 (height)
Weight: 12.2Kg
Machine introduction:
AD-68PRO+ HI-FI integrated power amplifier is an ultra-thin high-end HI-FI integrated power amplifier developed by Guangzhou Tianyi Electronics Co., Ltd. in August 2009. It is designed to create a sound quality and sound for music lovers who demand taste. A high-fidelity music control center with exquisite, exciting and fashionable appearance and visual effects. In order to meet the requirements of modern home furnishings for high-quality and fashionable audio products, AD-68 adopts an ultra-thin 1.5U (66mm) height. The small and exquisite panel is still based on Tianyi’s consistent black and white two-color aluminum alloy wire drawing panel. It is embellished with a very delicate blue dot matrix subtitle display, exquisite and beautiful volume knob, coupled with a refined aluminum alloy remote control, compact and heavy hand feeling, more highlights the unique characteristics of the digital era HI-FI taste!
One thing to tell first is: in order to meet the original design intention of small size and great ability, the designer carefully designed a DAC audio decoder for this power amplifier that looks like a little bird and Yiren, aiming to further explore the power amplifier’s impact on the entire audio system. The potential for sound quality and tone enhancement has invisibly increased the technological gold content of AD-68. The DAC audio decoder has independent digital filtering, D/A conversion, and the decoding chip selects the CS8416 and AD-1955 decoding chips that are well-received in the enthusiast industry. This is a set of higher evaluations and better sound quality than AD-1853. The top DAC chip with sampling accuracy and quantization standard up to 24bti/192KHz. Its dynamic range and signal-to-noise ratio index can reach an astonishing 126dB! In order to minimize the error of the digital data stream in the timing resolution (timing resolution), this machine also specially selects extremely stable and accurate The high-stability crystal oscillator ensures that the timing in the digital quantization, sampling, decoding and D/A conversion circuit is consistent from beginning to end, making jitter distortion almost zero. It laid a solid foundation for the high fidelity of sound quality. With this set of decoders, even from an ordinary DVD player or an ordinary CD data stream signal taken from a computer, after being decoded by the built-in DAC of the machine, it can be played out as good as a mid-range CD player. Beautiful sound, this is definitely one of the highlights of this machine.
There are relatively complete input and output interfaces on the rear board: optical and coaxial input, and the terminal blocks are all advanced audiophiles.
In terms of circuit, the machine adopts single-ended input, double-ended output differential amplifier circuit and mirrored constant current source load. This can greatly improve the voltage gain and stability of the voltage amplifier stage. The second stage is common base circuit amplification and mirroring. The constant current source load further improves the voltage gain and effectively improves the linear characteristics of the circuit amplifier stage. After the temperature compensation circuit, the three-stage Darlington circuit outputs sufficient power of 80W (8 ohms) per channel to promote the speaker's sound. There is also a DC servo circuit and an appropriate amount of negative feedback circuit to ensure the stability of the machine. The materials of the components are also considered as far as possible to select the resistance-capacitance components with good sound quality, reliability and high quality, such as fever op amp OPA2134, accurate and sound CS3310 digital volume control chip, 44000U MARCOA audio special fever electrolysis, 300W high-quality ring cow, etc. It laid a solid foundation for the beautiful sound of the machine.
Open the cover, it can be seen that the integration of this machine is very beautiful, and the meticulous design and picky materials have made this Tianyi classic machine!
Because the product has mature technology, built-in high-end DAC decoder, advanced technology, first-class sound effect, high performance and price ratio, after a period of market sales and use, its excellent performance and wonderful sound quality have been recognized by consumers and won The 2010 "Excellent Power Amplifier Design Award" and the "2010 High Fidelity Power Amplifier Comprehensive Strength Award" were well received!
AD-68PRO+ high fidelity combined power amplifier (with DAC decoder)
