Common Key Specifications and Features (Varies by Model):
Channels: 2.0 (Stereo - Left and Right)
Amplifier Chip: Often utilizes Class-D amplifier chips from Texas Instruments (like TPA3116, TPA3255) or other manufacturers for efficient power delivery.
Output Power: Varies significantly by model, ranging from 20W-30W per channel to 100W-300W per channel or more, typically specified at a certain impedance (e.g., 4Ω or 8Ω) and THD (Total Harmonic Distortion) level.
Speaker Impedance: Usually compatible with passive speakers ranging from 2Ω to 8Ω.
Input Sensitivity: Varies depending on the model.
Signal-to-Noise Ratio (SNR): Typically ≥ 90dB or higher, indicating low noise.
Total Harmonic Distortion (THD): Usually low, often ≤ 0.1% or less at moderate power levels.
Frequency Response: Typically covers the audible range, e.g., 20Hz - 20kHz (± a certain dB).
Inputs:
RCA Stereo input is common.
Some models may include Bluetooth connectivity (various versions and codecs like SBC, AAC, aptX).
Some higher-end models might offer USB, optical, or coaxial digital inputs.
Some models like the Aiyima A07 Pro include a 3.5mm AUX input.
Outputs:
Speaker binding posts for connecting passive speakers.
Some models may include a line-level output (RCA or 3.5mm) for connecting to a subwoofer or another amplifier.
Controls:
Volume control is standard.
Many models include Bass and Treble tone controls for adjusting the audio.
Input selection switches or knobs are present on models with multiple inputs.
Power Supply: External DC power adapter with varying voltage and current ratings depending on the amplifier's power output requirements (e.g., 12V, 19V, 24V, 36V, 48V). Some models may or may not include a power supply.
Chassis Material: Often made of aluminum alloy for good heat dissipation and durability.
Size and Weight: Typically compact and lightweight.
Additional Features (Vary by Model):
Bluetooth antenna for wireless connectivity.
Replaceable op-amps for sound customization (on some models like the A07 Pro).
