[2.1ch Stereo Power Amplifier] The AIYIMA A20 is a Hi-Fi 2.1 fully balanced amplifier, featuring a TPA3255 amplifier chip and two LME49720 op-amps and seven NE5532 op-amps. With a high signal-to-noise ratio (≥116dB), low distortion (0.002%), high dynamic range (≥110dB), dual-channel pure output, and independent bass drive, it reproduces realistic sound quality.
【HPF High-Pass Filter Adjustment】The multi-gear allows you to adjust the high-pass filter (60-200Hz), precisely matching the lower limit of the speaker's low frequencies. This eliminates bass overload, makes mid-high frequencies clear and transparent, enhances overall sound quality and clarity, reduces distortion, achieves frequency division, and works in conjunction with a subwoofer.
[BYPASS Volume Bypass Function] Press and hold the BYPASS button on the back of the device for 3 seconds to switch to volume bypass mode. The role of BYPASS is to bypass the amplifier's own tone control (bass/treble), equalizer (EQ), ambient sound processing (DSP mode, etc.), and most importantly, the preamplifier circuit, transmitting the input audio signal to the power amplifier circuit in the most direct and pure form. Also, the volume is fixed and cannot be adjusted (usually at maximum). This function is designed to pursue the ultimate sound quality and can be integrated into more complex home theater systems: equipped with an active subwoofer output, it can be used to build a complete 2.1ch home theater system.
【Replaceable Op-Amp Design】The AIYIMA A20 uses the TPA3255 amplifier chip and adds the new LME49720 (replaceable) operator chip, allowing for interchangeable operation with a variety of operator chips. Replaceable operator models include: LM4562, NE5532, OPA2604, OPA2134, JRC5532, Muse02, etc. To enhance the product's appeal, core components include German WIMA capacitors, Japanese Ruby capacitors, and Japanese NJW1195 volume ICs, aiming for higher quality and better sound.
[Package Contents] AIYIMA A20 Balanced Stereo Power Amplifier *1, 48V 5A GaN Power Adapter *1, 12V Trigger Cable *1, User Manual *1, Warranty Card *1, 24-Month Warranty and Prompt Support Service.
Product specifications:
Amplifier chip: TPA3255
Operational amplifier chips: LME49720 x 2 (plug-in), NE5532 x 7 (chip)
Interchangeable op-amp chips: LM4562, NE5532, OPA2604, OPA2134, JRC5532, Muse02, etc.
Other major components: WIMA capacitors/Ruby capacitors/Nippon NJW1195 volume IC
Input terminals: RCA, XLR
Output terminals: SPEAK OUT, SUB OUT
Other terminals: 12V trigger input
SINAD: 95dB
SNR: ≥116dB
Dynamic range: 110dB
Distortion (THD+N): 0.002%
Speaker impedance: 4-8Ω
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