Ampapa 2 Channel Bluetooth Amp: HiFi 300W x2 Stereo Amplifier with BT 5.2 | HPF | Digital VU Meter | SUB Pre-Out | TRS Balanced

Q&A Q: Can I replace the op-amps in the D1? A: Yes, the D1 uses 2 PCs pluggable NE5532 op-amps, which can be replaced by normal dual op-amps like 2604/2134/MUSES02 etc. Before replacing, please turn off the power, ensure correct orientation, and power on only after confirming proper installation. Q: Why dont the single VU meter and spectrum display work properly? A: In dual VU meter mode, both meters show the audio levels for the left and right channels separately. In single VU meter and spectrum modes, the D1 only detects the left channel input. If only the right channel is connected, the VU meter and spectrum display will not operate. Q: Does the high-pass filter affect the Pre-Out signal? A: No, the high-pass filter only applies to the speaker output. The Pre-Out delivers a full-range signal. Q: Are the Pre-Outs volume and tone controls synchronized with the speaker output? A: Yes. Q: Is it normal for the D1 to become hot during operation? A: The D1s TPA3255 amp chip dissipates heat through contact with the chassis. It is normal for the chassis to heat up during operation. This does not affect performance or lifespan of the D1. Please place the D1 in a well-ventilated area, and avoid stacking devices or blocking ventilation. Q: What should I use the 12V trigger input for? A: The 12V trigger input is designed for use with preamps or DACs that have a trigger output to achieve synchronous power on and off. Please do not use this port as an audio input or connect it to a power supply, as this could damage the D1. Q: What is the required power supply for the D1? A: The D1 requires a DC 24-48V (=4A) input voltage. Please use the supplied power adapter for optimal performance. If using a third-party power supply, ensure it meets the required voltage and current specifications. Parameters Brand: Ampapa Model: D1 Audio input: RCA / TRS / Bluetooth 5.2 Audio output: Banana speaker jacks / Pre-Out Max. output power: 300W 2 (4O) THD+N: 0.002% SNR: =114dB Frequency response: 20Hz-20KHz (0.4dB) High-pass filter frequency range: 30Hz-200Hz High-pass filter roll-off: 12dB per octave Bluetooth chip: QCC304X Bluetooth supported codecs: SBC / AAC / aptX / aptX-HD Input sensitivity: RCA: 2V / TRS: 4V Pre-out rated output level: 3.5V Matched speaker impedance: 4-8O Treble/Bass range: 10dB Input voltage: DC 24-48V =4A (5.5 2.5mm) Dimensions (W*D*H): 155 124 42mm / 6.10 4.88 1.65in Package dimensions (W*D*H): 268 192 95mm / 10.55 7.56 3.74in Net weight: 742g / 1.64lb Package weight: 1.73kg / 3.81lb Power Output Table of the D1 With 48V 5A power supply: 120W + 120W @ 4O 110W + 110W @ 6O 102W + 102W @ 8O Packing List 1 D1 Amp 1 DC 48V/5A GaN Power Adapter 1 Remote Control 1 Bluetooth Antenna 1 Cleaning Cloth 1 Certificate 1 Warranty 1 Manual