What is the output impedance?

No, this is a tube preamplifier. Impedance and power are decided according to your power amplification.

When I turn on the power switch, the LED light below it flashes red and blue. Is there a problem with the unit?

No, the red and blue flashing indicates the Bluetooth waiting to be connected. Blue light indicates a successful Bluetooth connection. Red light indicates AUX status.

¿Se puede conectar tornamesa por medio del 3.5mm?

No, no se puede conectar un giradisco a través del 3.5 mm. Se necesita un preamplificador para aumentar la señal del giradisco.

I have a crown amp and I want to use this with my Yamaha RX-385 via Bluetooth. Will this pre-amp work?

Yes, you can use this tube preamplifier before your amp and then connect it to your audio amplifier via Bluetooth.

When power is lost and then restored, the input reverts to Bluetooth. Can this be changed to RCA default?

No, this is the default behavior. If you want RCA input, you need to select it manually.

I bought this to use with my computer audio into a stereo amplifier and passive speakers. Is there a diagram on how to connect?

Yes. Connect your computer to the preamp or DAC, and then connect the preamp to the amplifier. Finally, connect the amplifier to the passive speakers.

Any way to keep this from defaulting to Bluetooth when you turn it on?

No, this behavior is set by the factory and cannot be changed. You will be notified in the future if there are any upgrades.

Is it possible to change the color of the light in the vacuum tubes to green?

No, the color of the light is just a display and cannot be changed. It has no impact on the sound quality.

Does it need to be turned off at night when not in use or can I leave it on?

Either option is fine. Tubes have a limited lifetime, so you can choose to turn it off at night to save the tubes and electricity.

How long does it take for the tubes to warm up?

The tubes take about 10 seconds to warm up, which is relatively fast for tubes.

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AIYIMA Audio 6J1 Tube Preamplifier HiFi Treble & Bass Adjustment Audio Preamp DC12V Stereo Tube Amplifier Preamp NE5532P Chips for Home Theater SystemTube-A3,Silver

Item #:10700358

4.7 rating

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PKR 18073

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This Bluetooth 5.0 Vacuum tube preamp provides sweet and warm sound quality with Bass and treble adjustment

Product Details

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Features & Benefits

AUX / Bluetooth Audio input switch mode with DC12V power supply
Upgraded tube design for easy replacement and soft voice
Solid build quality with separate power and audio circuit
Preamp not an audio amplifier, needs separate connection to powered speaker and amplifier

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Customer Questions & Answers

Question : What is the output impedance?
Answer : No, this is a tube preamplifier. Impedance and power are decided according to your power amplification.
Question : When I turn on the power switch, the LED light below it flashes red and blue. Is there a problem with the unit?
Answer : No, the red and blue flashing indicates the Bluetooth waiting to be connected. Blue light indicates a successful Bluetooth connection. Red light indicates AUX status.
Question : ¿Se puede conectar tornamesa por medio del 3.5mm?
Answer : No, no se puede conectar un giradisco a través del 3.5 mm. Se necesita un preamplificador para aumentar la señal del giradisco.
Question : I have a crown amp and I want to use this with my Yamaha RX-385 via Bluetooth. Will this pre-amp work?
Answer : Yes, you can use this tube preamplifier before your amp and then connect it to your audio amplifier via Bluetooth.
Question : When power is lost and then restored, the input reverts to Bluetooth. Can this be changed to RCA default?
Answer : No, this is the default behavior. If you want RCA input, you need to select it manually.
Question : I bought this to use with my computer audio into a stereo amplifier and passive speakers. Is there a diagram on how to connect?
Answer : Yes. Connect your computer to the preamp or DAC, and then connect the preamp to the amplifier. Finally, connect the amplifier to the passive speakers.
Question : Any way to keep this from defaulting to Bluetooth when you turn it on?
Answer : No, this behavior is set by the factory and cannot be changed. You will be notified in the future if there are any upgrades.
Question : Is it possible to change the color of the light in the vacuum tubes to green?
Answer : No, the color of the light is just a display and cannot be changed. It has no impact on the sound quality.
Question : Does it need to be turned off at night when not in use or can I leave it on?
Answer : Either option is fine. Tubes have a limited lifetime, so you can choose to turn it off at night to save the tubes and electricity.
Question : How long does it take for the tubes to warm up?
Answer : The tubes take about 10 seconds to warm up, which is relatively fast for tubes.

Customer Ratings

4.7 out of 5

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AIYIMA Audio 6J1 Tube Preamplifier HiFi Treble & Bass Adjustment Audio Preamp DC12V Stereo Tube Amplifier Preamp NE5532P Chips for Home Theater SystemTube-A3,Silver

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AIYIMA Audio 6J1 Tube Preamplifier HiFi Treble & Bass Adjustment Audio Preamp DC12V Stereo Tube Amplifier Preamp NE5532P Chips for Home Theater SystemTube-A3,Silver

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