Name: 6J1 Valve Tube Preamplifier Board DIY Kits
Model: 6j1 tube (can replace the model 6AK5, 6AU6,5654, etc.)
Channel type: 2.0 / Stereo
Working voltage: AC12V 0.8A or above
Power connector: 5.5 x 2.5 plug
Board Dimensions: Width 77mm x Depth 75mm x Height 57mm


1.AC 12V input: DC5.5 * 2.1 socket, with AC 12V transformer, if you want to use plug-free AC 12V transformer, you need to wire the power cord soldered on the circuit board. Remember: can not use DC power input, otherwise it does not work!
2.Channel input: for the audio signal input, you can connect the phone, computer, M3, MP4, and other music players.
3.Channel output: for the audio signal output, can be connected to the amplifier, power amplifier board audio signal input.
4.Power switch / Volume knob: Turn the knob counterclockwise to begin lowering the volume. When the volume is turned to the minimum, if you continue to rotate until the "tick" is heard, the power is off and the indicator is off. In the closed state, Clockwise rotation, hear the "tick", the indicator light, that power has been turned on, then the volume is minimal, and then continue to clockwise rotation is to increase the volume.

How to use:

6J1 tube buffer 0.85 times magnification enlarge, connect the sound source and the former level or after the class,
can effectively filter digital flavor, the human voice is relatively good.
Notice:This is DIY Kits, with case,you need assemble it by yourself!

Package included:

1 x 6J1 Valve Tube Preamplifier Board DIY Kits
1 x case

(1) FREE Shipping 10 - 15 business days, (2) Standard Shipping 7 - 12 business days.

Shipping and Delivery Estimates

We ship in-stock orders as soon as possible. This is often within two business days, but there are situations where it may take longer. All estimates are based on business days.


(1) The shipping time mentioned above refers to the estimated time of business days that the shipment will take after an order has been shipped.

(2) Business days do not include Saturday/Sunday and any public holidays.

(3) These estimates are based on normal circumstances and are not a guarantee of delivery times.

(4) We are not responsible for the failures or delays in delivery resulting from any force majeure event, such as natural disaster, bad weather, war, customs issues, and any other event beyond our direct control.

Our policy lasts 14 days. If 14 days have gone by since your purchase, unfortunately we can't offer you a refund or exchange. To be eligible for a return, your item must be unused and in the same condition that you received it. It must also be in the original packaging.

for more information please visit our Refunds & Returns Policy page.

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6J1 Valve Tube Preamplifier Board Module Bass on Musical Fidelity DIY Kit with Case

$55.99 $36.99