Choosing 6N2 and EL84 tubes to amplify the low-frequency voltage and power amplification, and 6Z4 tube to rectify. Each tube has been tested by GS-5A tube tester and distortion test, with low power consumption and high efficiency. Using The classic two-stage negative feedback amplifier, with stable overall performance and low noise. It is suitable for classical and vocal music, and the output sound is pure, warm, delicate and mellow. High-quality components can ensure sound quality such as Japanese chemical electrolytic capacitor; ALPS potentiometer; Italian Arcotronic coupling capacitor; Taiwan Kunmao metal film resistor and FR4 epoxy glass fiber circuit board. With 1.4mm steel plate, aluminum alloy CNC panel and knob and high-quality gray paint. Very perfect in circuit design and workma.
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Bluetooth 5.0 Audio Receiver U Disk RCA 3.5mm 3.5 AUX Jack Stereo Music Wireless Adapter with Mic For Car Kit Speaker Amplifier
Aliexpress UK
Tube Model: 6N2 1+EL34 2. 1 Set x DIY Kit of Tube Amp. Audio Input: RCA socket. Input Sensitivity: 800mV. Input Impedance: 10KΩ. Audio Output: three wiring sockets. assembly instructions for a product.
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Bluetooth 5.0 Audio Receiver Car Kit 3.5MM 3.5 Jack AUX Auto Stereo Music USB Dongle Wireless Adapter for Car Speaker Amplifier
Aliexpress UK
EL34+ECC83 single-ended Class A Stereo amplifier Kit 10W 2. There is no need to worry about it. All the precision calculations, such as EL34 cathode resistance current is 50MA. This is DIY KIT, you need to solder it by yourself.
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NFC Bluetooth 5.3 Audio Receiver 3.5mm AUX RCA USB TF HIFI Stereo Music Wireless Adapter With Mic For Car Kit Speaker Amplifier
Aliexpress UK
The assembled amplifier PCB is pictured here for illustrative purposes only as the kit will require assembly. Ever wanted your own Valve Amplifier?. This amplifier must also be earthed for safety. This kit board is also available ready built and tested, ready to wire into your own chassis.
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Bluetooth 5.0 Audio Receiver Car Kit 3.5MM 3.5 Jack AUX Auto Stereo Music USB Dongle Wireless Adapter for Car Speaker Amplifier
Aliexpress UK
Tube Model: 6N2*1+EL34*2 Output Power: 5W+5W @ 8 ohms Frequency Response: 30-40Khz (+-1db) Input Sensitivity: 800mV Residual Noise < 0.6mVac.
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Car Bluetooth 5.0 Receiver 3.5mm 3.5 AUX Jack Stereo Music Audio Car Kit Transmitter Speaker Amplifier Wireless Adapter with Mic
Aliexpress UK
1. Reasonable layout circuit to reproduce classic style of 300B tube amplifier. 2. 2.0mm thick high quality immersion gold / slicker solder blue printed circuit board (185.4 * 286.2mm). 3. Ultra-low noise layout traces, almost no noise. High thermal design to ensure stable operation for a long time even if in a closed chassis.
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Bluetooth 5.0 Audio Receiver U Disk RCA 3.5mm 3.5 AUX USB Jack Stereo Music Wireless Adapter Mic For Car Kit Speaker Amplifier
Aliexpress UK
Choosing 6N2 and EL84 tubes to amplify the low-frequency voltage and power amplification, and 6Z4 tube to rectify. Each tube has been tested by GS-5A tube tester and distortion test, with low power consumption and high efficiency. Using The classic two-stage negative feedback amplifier, with stable overall performance and low noise. It is suitable for classical and vocal music, and the output sound is pure, warm, delicate and mellow. High-quality components can ensure sound quality such as Japanese chemical electrolytic capacitor; ALPS potentiometer; Italian Arcotronic coupling capacitor; Taiwan Kunmao metal film resistor and FR4 epoxy glass fiber circuit board. With 1.4mm steel plate, aluminum alloy CNC panel and knob and high-quality gray paint. Very perfect in circuit design and workma.
eBay
Car BT5.0 Bluetooth Receiver Transmitter 3.5mm AUX Jack Stereo Music Audio Car Kit Speaker Amplifier Wireless Adapter with Mic
Aliexpress UK
Support 4 ways audio input. Gold-plated tube seat. Match tube Assembled board ，just for reference：. Gold-plated pcb. 6DJ8 or ECC88 x1.
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Bluetooth 5.0 Audio Receiver Car Kit 3.5MM 3.5 Jack AUX Auto Stereo Music USB Dongle Wireless Adapter for Car Speaker Amplifier
Aliexpress UK