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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New Upgraded] AIYIMA A3 PRO GE5654 Tube Preamplifier Bluetooth 5.0 with Treble & Bass Adjustment DC12V HiFi Audio Preamp for Home Audio Amplifier SystemBlackBT 5.0

Item #:15609639

4.7 rating

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PKR 21183

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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

Product Description

New Upgraded] AIYIMA A3 PRO GE5654 Tube Preamplifier Bluetooth 5.0 with Treble & Bass Adjustment DC12V HiFi Audio Preamp for Home Audio Amplifier SystemBlackBT 5.0

Overview

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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

197 customers ratings

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4 star
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3 star
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New Upgraded] AIYIMA A3 PRO GE5654 Tube Preamplifier Bluetooth 5.0 with Treble & Bass Adjustment DC12V HiFi Audio Preamp for Home Audio Amplifier SystemBlackBT 5.0

The Aiyima TUBE-A3 pro is a tube preamplifier with Bluetooth and AUX inputs. The product FAQs answered various questions, including tube warm-up time, its compatibility with different amplifiers, and its power status. The reviews were mostly positive, with many customers praising its sound quality, build quality, and Bluetooth reception. However, some users reported experiencing distorted audio and signal cut-ins, which detracted from the overall experience. Overall, the Aiyima TUBE-A3 pro is a good option for those seeking to enhance the sound of their stereo system.

Pros

Good sound quality
Nice build quality
Bluetooth reception is good
Quick tube warm-up time

Cons

Distorted audio and signal cut-ins reported by some users
Output signal cuts out for about a quarter to a half second, which is a design flaw

Important Information

Limitations : For products shipped internationally, please note that any manufacturer warranty may not be valid; manufacturer service options may not be available; product manuals, instructions, and safety warnings may not be in destination country languages; the products (and accompanying materials) may not be designed in accordance with destination country standards, specifications, and labeling requirements; and the products may not conform to destination country voltage and other electrical standards (requiring use of an adapter or converter if appropriate). The recipient is responsible for assuring that the product can be lawfully imported to the destination country. When ordering from Ubuy or its affiliates, the recipient is the importer of record and must comply with all laws and regulations of the destination country.
Not all the products listed on Ubuy are for sale, as Ubuy is a global search engine. Products are subject to export/trade regulations.

New Upgraded] AIYIMA A3 PRO GE5654 Tube Preamplifier Bluetooth 5.0 with Treble & Bass Adjustment DC12V HiFi Audio Preamp for Home Audio Amplifier SystemBlackBT 5.0

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