YAQIN MS34B EL34 Speaker Amplifier

Features:
Solid aluminum alloy rotary button
High-quality tin-sprayed double-sided copper-plated epoxy fiber board, circuit specification reduces distortion and improves signal-to-noise ratio
The front stage uses 6H8C and 6H9C common cathode amplification and long tail reverse drive, and the rear stage uses Czech EL34 II
The components are all hand-welded, and the lines are neatly distributed
High quality gold-plated resistor
Using high-end brushed panel, exquisite workmanship, excellent hand feeling
High voltage power supply for the automatic delay control, can effectively extend tubes life.
Switch between ultra-linear (UL) and three poles (TR) connection mode, to meet different user needs.
Function with Bluetooth5.0
Select imported WIMA (MKP10) Philips capacitors and high-precision Japanese original ALPS special potentiometers

Tube Amplifier Precautions
1. Tube amp must connected with speakers before turning ON. Strictly prohibit send signals to amp without connected loads(speakers) or load short circuit when the switch is ON.
2. Too high or too low power supply voltage does irreversible harm to the amp,preferably less than 5% of the specified voltage. If your mains voltage exceeds this value, often best to use with the AC power supply.
3. Temperature is higher when tube amps working, placing attention to ventilation, cooling. 
4. In the boot or just shut down for a period of time (within 30 minutes) Do not spill liquid on the tubes.
5. You should take about 100h time to operate the amp.RUN-IN to the amp gives it's best and stable sound.so during the first 100h use time the sound maybe is not the best,you can also use your own run-in method.
6. If you don't sure how to plug the tubes, please contact us before try it

Speakers connection
All tube amplifier used with stereo mode: L(left) and R(right) speakers.
Normally there are 6 speaker cable connectors: +8L, +4L, -0L, -0R, +4R, +8R
Example: +8L and -0L are for connecting with your Left 6-8ohms speaker
-0R, +4R is for connecting with your Right 4ohms speaker