AIYIMA A20 Stereo HiFi Fully Balanced PFFB Power HPF Filter LME49720 x 2 NE5532 x 12V Trigger 48V 5A GaN Power Adapter Included for Home Audio Systems

---------------------------------------------------------------------- 【Voltage Compatibility】 When using electrical appliances, please note that they are designed for Japanese voltage specifications (90-110V), so if you use them with a different voltage, it may cause a malfunction. 【Plug Type】 Our products use Japanese plug types (A or B type). Please use a conversion adapter if necessary. 【Important Note on Transformers and Adapters】 A transformer adjusts voltage to match your device’s requirements. A conversion adapter only changes the plug shape and does not adjust voltage. Using only a conversion adapter without a transformer may result in damage to the product. 【Liability】 We are not responsible for malfunctions or damages caused by improper use, such as operating the product without a transformer. ----------------------------------------------------------------------

2.1 Stereo Power Amplifier: The AIYIMA A20 is a high-fidelity 2.1 fully balanced amplifier featuring a TPA3255 amplifier chip and two LME49720 + seven NE5532 op-amp chips. It delivers a high S/N ratio (≥116dB), low distortion (0.002%), high dynamic range (≥110dB), dual-channel pure output, and independent low-frequency drive, delivering realistic sound quality. 【HPF High-Pass Filter Adjustment】Multi-gear allows you to adjust the high-pass filter (60-200Hz) to precisely match the low frequency limit of your speakers. It eliminates bass overload, makes mid- and high-range sounds clearer, improves overall sound quality and clarity, reduces distortion, achieves frequency division, and works well with subwoofers. BYPASS Volume Bypass Function: Press and hold the BYPASS button on the back of the device for three seconds to enter Volume Bypass mode. BYPASS bypasses the amplifier's tone controls (bass/treble), equalizer (EQ), ambient sound processing (DSP mode, etc.), and, most importantly, the preamp circuit, allowing the input signal to be transmitted directly and purely to the power amplifier circuit. The volume remains fixed and unadjustable (usually at maximum). This feature is designed for ultimate sound quality and can be integrated into more complex home theater systems, including active subwoofer outputs, to create a complete 2.1-channel home theater system. [Interchangeable Op-Amp Design] The AIYIMA A20 uses a TPA3255 amplifier chip and adds the new LME49720 (interchangeable) op-amp chip, allowing for a variety of interchangeable op-amp chips. Compatible op-amp models include LM4562, NE5532, OPA2604, OPA2134, JRC5532, Muse02, etc. To enhance the product's appeal, the core components use German WIMA capacitors, Japanese ruby capacitors, and Japanese NJW1195 volume IC, aiming for higher and better sound quality. 【Package contents】AIYIMA A20 Balanced Stereo Power Amplifier *1, 48V5A GaN Power Adapter *1, 12V Trigger Cable *1, User Manual *1, Warranty Card *1, 24-month warranty and prompt customer service. Product Specifications: Amplifier chip: TPA3255 Op-amp chip: LME49720 x 2 (plug-in), NE5532 x 7 (chip) Interchangeable op-amp chips: LM4562, NE5532, OPA2604, OPA2134, JRC5532, Muse02, etc. Other major components: WIMA capacitor/Ruby capacitor/Japan 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