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Lowest price we've seen: $14.58 on Oct 31 at Amazon. Tracked across 3 stores since Oct 31.
the left channel output / right channel output: an audio signal output terminal can be connected to the audio signal input amplifier, power amplifier board. the power switch / volume knob: turn the knob counter-clockwise to decrease the volume beginning, when the volume down to the minimum, if it continues to rotate until the "ticking" sound, then the power off, the light goes off; in the closed state, Turn the knob clockwise to hear "tick" sound, light is on, the power is turned on, then the volume is minimal, then continue clockwise rotation is to increase the volume. Type: 6j1 tube Power input: AC 12V 1A, 5.5x2.5 plug Channel:2.0 / stereo Potentiometer Role: Volume adjustment + Power Switch Size: 77 x 75 x 52mm Colour:As shown Material:PC+Metal Package Contents: 1 x 6J1 preamp amplifier board diy kits Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.
