Feature

●1. This is a preamp, not a power amplifier. Use in combination with post amplifier or active speakers. Passive speakers, speakers and earphones cannot be directly connected to power amplifiers. When not in use, the voltage becomes unstable and the car will burn out
●2.Because the general audio line or power filtering is not enough, the possibility of the bottom noise current is very high, we suggest you use the appropriate audio cable or power supply
●3. Make sure there are no problems with your sound source. The preamp has its own preamp function. If the sound source itself has noise, the preamp only amplifies the noise. Do a good sound source test
●4. Check if the tube is inserted into the base. Insert the tube and base. Please be sure to insert the tube when power outages


Description

Product parameters:
Product Name: A3PRO
Tube Model: 6K4
Interchangeable tubes include 6J1, 6J2, GE5654, 6J3, 6J4, 6J5, 6J1, 6AK5 and more.
Opamp Chip: NE5532P*2
Interchangeable OP Amplifier Chips: OPA2604, OPA2134, LM4562, JRC5532, etc.
Bluetooth Chip: Japanese JL (AC20BP04230-25C4), Bluetooth 5.0
Distortion Rate: 3%
Frequency Response Range: 20hz-20khz (±3db)
Signal-to-Noise Ratio: 98db
Tweeter adjustment range: ±6 db
Bass adjustment range: ±10db
Input mode: RCA
Supported Devices: Mobile Phone, Tablet, Computer, MP3, TV etc. You cant sing or play it in the previous phase of the game.
Output mode: active speaker or power amplifier + passive speaker
Operating Power: DC12V
Size: 118*95*30mm

Note:
Choose the color and power plug you need. Power supply is not included with selected unit.
This is a vacuum tube preamp, so you need to connect it to an active speaker or power amplifier.
It cannot be directly connected to speakers, passive speakers, headphones, phono amplifiers, cars, etc.