Power amplifier chip: TPA3255. Operational amplifier chips: LME49720*2 (plug-in), NE5532*7 (surface-mount) Replaceable operational amplifier chips: LM4562, NE5532, OPA2604, OPA2134, JRC5532, Muse02, etc. Other key components: WIMA capacitors/Ruby capacitors/Japanese NJW1195 volume IC Input interfaces: RCA, XLR Output interfaces: SPEAK OUT, SUB OUT Other interfaces: 12V trigger input. Signal-to-noise ratio (SINAD): 95dB. Signal-to-noise ratio (SNR): ≥116dB. Dynamic range: 110 dB. Total harmonic distortion plus noise (THD+N): 0.002% Speaker impedance: 4-8Ω. Frequency response: 20Hz-20kHz (±0.4dB). Output power: 300W × 2 (4Ω). Other features: BYPASS Volume Bypass/RCA Gain (3dB)/HPF High-Pass Filter (60-200Hz). Supported Devices: Mobile phones, tablets, computers, decoders, preamps, streaming devices, CD players, etc. Output Mode: 1. Passive Speaker 2. Passive Speaker + Passive Subwoofer Operating Voltage: DC 24-48V. Product dimensions: 19 x 14.2 x 4.5 cm. Packaging Dimensions: 29.7 x 22.8 x 7.5 cm. Product Net Weight: 1100 g. Packaged weight: 1240 g (excluding power supply).
Included Components :
A20 x1 Trigger Cable 12V x1 Power Adapter x1 Manual x1 Warranty Card x1
PREMIUM COMPONENTS - The A20 hi-fi stereo amplifier uses TPA3255 Class D amplifier chip and is equipped with German WIMA, Japanese Genicon and Ruby capacitors, as well as gold plated terminals. It delivers a maximum output power of 300 watts under 4 ohms (requiring 48V 10A power supply), ensuring exceptional sound quality while achieving a signal-to-noise ratio (SNR) of up to 116dB and distortion ratio as low as 0.002%, resulting in extremely clear, low-distortion audio performance.
HPF High Pass Filter Adjustment The TPA3255 desktop amplifier is equipped with an adjustable high pass filter (HPF) with an adjustment range of 60-200Hz. It optimizes mid and high frequencies for clear, transparent sounds, while minimizing interference in low frequencies. It enhances clarity and creates a dynamic sound field, making it an excellent choice for stereo and home theater audio systems.
Rich Connectivity Options: This 2.1 balanced stereo amplifier is equipped with RCA/XLR input interfaces and a 12V trigger, balanced inputs effectively reduce noise, provide pure stereo output, and restore authentic sound quality through independent speakers for low frequencies. The 12V trigger input interface allows synchronized control with other devices, simplifying the power-on process without requiring separate operations.
Enhanced Sound Quality The A20 Class D amplifier uses two LME49720 operational amplifier chips (pluggable) and seven NE5532 (surface mounted) to achieve ultra-low distortion, low noise, and extremely transparent sound quality without coloring. Different Audio Experiences You can replace LME49720 operational amplifier chip with LM4562, NE5532, OPA2604, OPA2134, JRC5532, Muse02, etc., so as to precisely adjust the sound quality to perfection.
BYPASS FUNCTION The built-in A20 amplifier has a bypass mode that reduces the loss of audio quality, making it a high fidelity pure power amplifier. Note: In bypass mode, the amplifier volume is set to the maximum. Before switching to bypass mode, please turn down the volume at the source to avoid hearing damage and speaker damage. This mode has a memory function; to exit, press and hold for three seconds.
PFFB circuit design: The A20 uses PFFB (post-filter feedback) technology to effectively overcome the common load dependency problem of class D amplifiers, improve distortion, optimize frequency response, and thus greatly improve sound quality and performance.
