HiFi Vacuum 6A2 Tube MM Phono Turntable Preamplifier HiFi Stereo Phonograph

Parameter:

Electrical level output: 600mV @3mV 1KHzSNR: ≥98dBWorking Voltage: DC12VProduct Dimension: L118.5*W98*H33MMFrequency Response: Meet standard RIAATHD: 0.1%Package Dimension: L235*W210*H65mm

Operation Steps:

1.The gear switch is in the OFF state.2.Install the tube into the base of the tube according to the direction (the tube is not p>

Warning:

1. Please do not open the shell without permiion. Improper operation may cause the danger of electric shock.2. Please use the power supply of the regular manufacturer, otherwise it will damage the machine.3. Please do not use the machine in a high temperature and humidity environment.

Frequently Asked Questions:

Q:All the cables are connected, but no sound output?

A: 1. Check the POWER indicator is on, pre the POWER on if the light is still off, At this point you can find a same output voltage power supply (must 12V) to check if the machine or power supply fai.If the POWER indicator light is on, check whether the corresponding input signal is selected correctly.

2. If the indicator light is on, check whether the VOL knob is in the minimum position. If so, turn clockwise to normal Volume

3. If both of the above are normal, check the input device if it is paused, mute, or the volume is minimized.

Q: Why does the sound is cracking?

A: This product is for the tube preamp, but also can be used as preamp, If post equment is max volume & preamp too, it's easy to distortion, you just need to turn down the volume of the equment, then ok.

Q: Why do loudspeakers make a lot of electric noise?A: if you are not using the factory standard power supply, please replace the power supply before testing.Many power supply in the market have large interference coefficient, which will cause a lot of current sound.

Q: Why the speaker has noise when I just plug in the input cable but don’t connect the sound sources ?

A:1.If you use unshielded signal lines, there will be interference signals entering the power amplifier. If you hate the sound, you are advised to use the shielded signal lines or unplug the signal lines.

2. Check if the grounding of the player is connected. If the ground wire is not connected, there will be a lot of noise.

Q: Why do I use MM to put input, it has no sound?

A: Check if the pre-stage input is still plugged in. If the pre-stage input is plugged in, then the input will not sound, and the pre-stage input line must be unplugged.

Q: Why the sound is very hard at the beginning, the 3 frequencies is not very clear, but normal after a day use?

A: The tube is a very sensitive device with good effect once the temperature should reach a degree commonly, normally about half an hour later the voice is very natural.

Q: Can I update the tube?

A: yes, we have tested and matched 6k4/6J1/6j4/GE5654/6ak5/6*1n，in our factory.It can be replaced directly.The sound will be different with different tube.

Q: Can I replace the tube without power off?

A: No, it is very easy to burn the tube,because the machine works under high voltage and the hot plug will damage the tube & machine,also will hurt the people.

About shping
Shping and Packaging All it will be double checked and well packed before sending.It will be dispatched within 2 business days after buyers pay for the order. It usually takes about 14 to 18 working days for delivering the package to the destination(for e areas,it may take a little longer). 

Special Announcement:
Please fill in the correct and detailed consignee, address and phone number in the order. For fast and correct delivery.If you do not receive order within 30 working days,please feel free to contact Customer Service before leaving Negative and Neutral Feedback, we will do our best to help you resoe the problem.TaxNo, you will only pay what is quoted as total cost at checkout, no more. You are not expected to pay any additional duties or taxes. If you are asked by Customs or our logistic partner to pay duties, please contact our Customer Service .

Your 100% satisfaction is very ant to us
If the product is not on good condition, You can return this product within 14 working days, please contact customer service center before returning.FeedbackYour satisfaction is our first priorityIf you receive the order and it is in good condition,we would be grateful if you would leave us 5 star Positive Feedback for the transaction.