Package:Yes
Channels:2 (2.0)
Model Number:6K4 tube
Maximum Power Per Channel:NO POWER
Origin:Mainland China
Certification:NONE

Product description:
This product is a tube pre-amplifier and needs to be connected to an active speaker or power amplifier.
It cannot directly connect speakers and passive speakers, headphones, phono amplifiers, cars.
Product name: tube preamplifier
Tube: 6K4/6A2/6J3
（The tube is disassembled）
Power supply: DC12-16V, current 1A or more (
DC12V 1.5A supply power
is recommended)
(without supply power)
Power socket: DC3.5/5.5*2.1
Product support replace tube: 6J1 6J2 6J3 6J4 6J5 6A2 6K4 6K5 6AK5 6AU6 6BA6 6BD6 EF93 6K7 GE5654 etc.
Pre-stage magnification: voltage magnification 5 times
Pre-stage frequency response: 5HZ-500KHZ
Pre-level sensitivity: 3V
Audio input: low-level signal input such as mobile phone, CD, computer, TV, MP3, etc.
Audio output: connect to power amplifier or active speakers
Size: 87*75MM
Note:
The tube preamp is a class A amplification state.. It is recommended to use shielded wire for the signal wire. Common wires may cause leakage or noise.
The high-fidelity lift can be adjusted freely, and the three-gear adjustment with a wave switch.
The switch on the far left is Hi-Fi
The switch is in the middle to raise a
The switch on the far right is the lift two.
Note:
1. If the signal line is not shielded or the power supply is not well filtered, noise may be generated. It is recommended to use shielded wires and a clean power supply for testing.
2. The tube buffer is amplified by about 5 times. The pre-amp has an amplification function, which is connected between the audio source, the pre-amp and the power amplifier. The noise from the audio source is amplified, so please use a good audio source to test.
Package included:
1Pcs 6K4 /6A2Tube Preamp（optional）
(without supply power)