Pay attention to Bundle when placing an order:

Bundle 1: AD-1PA+AD-1PRE pre amplifier and power amplifier /Net weight: 52.1kg

Bundle 2: AD-1PRE pre amplifier/Net weight:10.1kg

Bundle 3: AD-1PA power amplifier/Net weight: 42kg

Highlights of AD-1PA power amplifier:

1; A class A power amplifier circuit with fully balanced, fully symmetrical, differential input to differential BT power output;

2; The left and right channels are powered by independent power supplies, which greatly improves the separation of the power amplifier. Each channel outputs 300W/8Ω huge power, 1200W high-quality ring cow, up to 180,000 microfarad audio dedicated custom capacitors, high-power audio dedicated famous tube Parallel output, providing 60A high current output capacity.

3: Specially equipped with C gold-plated socket which is convenient for enthusiasts to change the operational amplifier.

4: Complete power amplifier protection circuit (short circuit protection, overheat protection, DC protection, etc.);

Product parameters:

Product model: AD-1PA.

Signal-to-noise ratio: ≥108dB (A-weighted, balanced input); ≥115dB (A-weighted, unbalanced input)

Total harmonic distortion: ≤0.01% (1KHz, normal working conditions)

Rated impedance: 8Ω.

Output power per channel: 300W (8Ω, THD=1%, 1KHz)

Whole machine power consumption: Class A mode static power consumption 260W~300W: Class A and B mode static power consumption 70W~110W

Resolution: ≥80

Frequency response range: 10Hz-100KHz (+1/-3dB)

Appearance color: silver

Net weight: 42kg

Overall dimensions: length 444mm, depth 449mm, height 294mm

Product material: aluminum alloy

Product parameters:

Model: AD-1PRE

Crosstalk (fundamental wave): ≥102dB (1KHz)

Frequency response: 20Hz-150KHz (+1/-3dB)

Signal-to-noise ratio: ≥108 (A weighting)

Total harmonic distortion: ≤0.005% (1KHz)

Supported formats: CD, HDCD, SACD (CD layer), MP3, WMA

Input interface: coaxial, optical, USB, AUX, CD, DVD

Output interface: two groups of unbalanced output, one group of balanced output

Net machine size: 444*108*420mm (manual measurement, subject to the actual product)

Net weight: 10.1Kg

AD-1PRE provides two sets of unbalanced outputs and a set of true fully balanced stereo analog audio outputs; these three sets of analog output terminals have analog output filter circuits optimized for group delay

Lossless input of digital signals

Equipped with five digital audio inputs: 2 groups of coaxial, optical fiber, 1 group of USB; 3 groups of analog audio input: 1 group of AUX, CD, DVD input, 1 group of balanced audio input

In order to make the DAC chip play a stronger performance, AD-1PRE uses a high-precision clock system module CS2000 from Cirrus Logic in the United States. This clock system uses a programmable △-∑ fractional frequency analog PLL (phase-locked loop) frequency synthesizer to stabilize the frequency synthesis/clock generation of the reference clock.

Effective reduction of clock jitter errors

Digital PLL can be used to generate analog phase-locked loop multiplication factor to ensure 8-75MHz reference frequency,

6-75MHz output frequency, 50Hz-30KHz input synchronous clock and 1H jitter suppression angular frequency.

CS2000 can provide clock generator and clock cleaning functions at the same time with a single IC

AD-1PRE uses the flagship chip MUSES72320 of Japan JRC Company as the electronic volume control chip. The chip is a two-channel electronic volume controller

The IC chip uses the AK4118 chip produced by AKM, Japan, which is a digital audio transceiver, supporting 192kHZ, 24-bit channel state decoder. The chip has a digital de-emphasis filter, which can improve the signal-to-noise ratio of high audio modulation and make the audio signal more reproducible; the sound is more detailed.

Lower noise: The differential output reduces even harmonics and minimizes the interference of common mode noise. The input noise of 13nV/-Hz further guarantees the maximum signal-to-noise ratio and dynamic range.

Lower distortion: The distortion rate is as low as 0000022%; the error of the audio signal is negligible, bringing a purer sound and giving you a better listening experience

Large signal bandwidth: The signal output bandwidth is up to 800KHz, which is more than enough even for audio signals with higher output bandwidth; in the usual audio bandwidth, the phase characteristics are very flat and the sound quality is more pleasant.

High noise immunity: In bipolar transistors, the conduction path is buried in dry silicon, and the current is not easily affected by external interference, so that the noise can be effectively controlled, and the noise density is as low as 1.1nV/Hz, so as to obtain purer audio .

Lower distortion rate: The distortion rate is as low as 0.000015%; the audio signal error is negligible, bringing a purer sound and giving you a better listening experience.

Small offset voltage: Bipolar transistors have better matching, and can achieve lower offset voltage for a given architecture. The offset voltage drift caused by temperature is smaller, which can significantly improve the performance of the amplifier. The smaller the offset voltage of the op amp, the larger the amplification factor and the better the signal amplification effect.

AD-1PRE whole machine power supply adopts 150W high-quality toroidal transformer and high-quality large-capacity electrolysis to form a multi-channel high-precision stabilized power supply, which is independently powered by logarithmic/analog circuits.