637 reviews analysed
1. Nobsound NS-02E Vacuum Tube Headphone Amplifier Stereo HiFi Earphone Pre-Amp DIY (Black)
Feature
- The Nobsound NS-02E can provide soft and warm sound while maintaining its exceptional clarity.
- The default tube is 6N3, which can be easily replaced with 6A8Q, 2C51, 5670, 5185, 6385, 6185, WE396, ECC 42, 6H3N, 6H3II, ECF82, 6CC42.
- The Nobsound NS-02E can be paired with your preamp, smart phone, computer, iPod, stereo system, and other audio device as well as your favorite headphones.
- The Nobsound NS-02E can also be used as a tube pre-amplifier.
- The affordable price makes both Hi-Fi freshmen and Hi-Fi veterans can enjoy it.
2. SMSL T2 Vacuum Tube Headphone Amplifier, Mini Audio HiFi Stereo Integrated Amp
Feature
- Low Ground Noise
- There’s no buzzing or ringing when you use our amp! We feature a high-grade microprocessor that controls the relay while its being switched on and off, achieving a low-ground noise power circuit.
- Sophisticated Design
- Our amp is constructed from top of the line, scratch resistant CNC aluminum.(Warm tip:When you use this product for a long time,please do not touch it by your bare hand,it may very hot,but please don’t worry this is a normal phenomenon.)
- High Drive Current
- Our specially designed power output boasts a larger than average drive current.(Note:please know that this headphone amplifier not for intense music)
- Semi-Set Tube Design
- As a safety measure, the high temperature portion of the tube is strategically placed inside of the amp and out of reach.(Please plug the power supply after all the connection been done for safety)
- Small Compact Size & 2 X 6J9 J-Grade Tubes
- The dimensions of our amp are 2.9inX3.5inX1.02in, and you can replace the stock tubes with E180F, 6ж9П, EF861, and 6688 tubes if you wish to be able to cue music.
3. Riverstone Audio, 6N3P-E Matched Pair (2 tubes) – Vintage NOS Russian Vacuum Tubes Replacement for 6N3 / 6N3P / 5670 / 5670W / 396A / 2C51 – Amplitrex Tested/Matched – Platinum Grade Pair (6N3P-E)
Feature
- ONE PAIR (2 pcs) – 6N3P-E NOS Vacuum Tubes. The 6N3P-E is a vintage Russian dual-triode 9-pin vacuum tube that was manufactured at the Relector plant in Saratov. This is the long-life (denoted by the “E” suffix) version of the 6N3P tube with 3 mica spacers and are considered an exceptional-quality audio tube.
- UPGRADE FOR 6N3 TUBES – 6N3P-E tubes are an upgrade/replacement for Chinese 6N3 and Russian 6N3P tubes and are generally suitable as a substitute for US/European 5670 / 5670W / 396A / 2C51 tubes (this should be verified by the amp manufacturer). IMPORTANT: AMPLIFIER DAMAGE CAN OCCUR IF YOU SUBSTITUTE THE WRONG TYPE OF TUBE – Before ordering CAREFULLY determine the type of tube used in your amplifier (tube type is printed on a tube).
- TESTED AND MATCHED by experienced engineers using Amplitrex tube testers to evaluate the electrical parameters of the tubes. Tubes are evaluated for plate current (ip), mutual conductance, tube gain, H-K leakage and noise. After matching, the tubes are evaluated for sound quality in an amplifier. If any deficiencies are found the tubes are not sold. LESS THAN 35% of the 6N3P-E tubes we test pass our standard for high fidelity audio use and are selected for these Platinum Grade Pairs.
- TEST RESULTS CLEARLY MARKED on the tube boxes with data labels for ip, Gm and tube gain are attached to the individual tube boxes. Tubes chosen for these special matched pairs have good balance between tube sections and close electrical parameter matching between the tubes (ip and Gm are within 10% and tubes are matched for gain within 5%). Individual matched pairs will have identical date codes (date codes for the tubes we offer range from 1974 to 1992).
- BUY WITH CONFIDENCE – Our Platinum Grade 6N3P-E vacuum tubes are backed by a no-nonsense 1-year warranty. THE BEST WARRANTY AVAILABLE in the audio tube business. We guarantee that the tubes selected for our matched pairs test at NOS levels. Tubes are supplied in our custom tube boxes (Riverstone Audio’s “Tube Cradle” boxes). Vacuum tubes sold by Riverstone Audio will have the “Riverstone Audio” name, logo and QC label on the boxes.
4. Nobsound 12AX7 12AU7 Vacuum Tube Preamp HiFi Preamplifier Shigeru WADA Japan Circuit (Assembled)
Feature
- Shigeru Wada Japan circuit improved circuit
- Vacuum Tube: Shuguang 12AX7 * 2 / 12AU7 * 2 / 6Z4 * 2
- Excellent scaffolding design, reasonable, regular, symmetrical device layout, strictly respect the grounding line
- Power Transformers 76 * 40 H250 0.35 sheets
- Japan ALPS 16 A-type audio potentiometer
- Full aluminum chassis with wood side panel
- 4 Set of stereo L/R RCA auido input, 1 set of RCA output
5. 6J1 Vacuum Electron Tube Valve Preamp Amplifier Board Headphone Amp Parts Preamplifier Musical Fidelity Kit AC12V 0.8A
Feature
- ★ Connect the 6J1 tube pre-amp between sound source and amplifier, it will effectively filter digital flavor, the music and human voice will be relatively good
- ★ Eight 470UF capacitor filter is very clean, excellent power system lead to no hum, filaments are powered with DC 12V and need to be connected in series in order to reduce noise
- ★ Coupling capacitor is electrodeless electrolytic capacitor with high frequency and low resistance
- ★ Using DC 5.5*2.1 socket and AC 12V transformer, you can also use AC 12V transformer without plug, just need to weld the power cord onto the circuit board
- ★ This kit comes in parts so you can assemble them together by yourself, enjoy the process of building your own tube amplifier
6. Nobsound Mini 6N3 Vacuum Tube Preamplifier HiFi Stereo Preamp DAC Audio Treble & Bass (Silver)
Feature
- Notice: ① Preamplifier needs to work with amplifiers or active devices
- ② Not PHONO preamp and can’t be used for record players
- 3 input modes can be switched freely: PC-USB, 3.5mm and RCA can connect to the computer, TV/DVD/CD, phone( with OTG function) and other player for lossless audio. No drive is needed.
- The output end can connect to the digital amplifiers, active multimedia audio devices. Compact design and exquisite appearance, gold-plated terminal, almost with no background noise.
- With treble and bass adjustment function, users can adjust it according to their own listening style. With corresponding indicators of different input mode, you can clearly and intuitively see the kind of input mode.
- Prompt and courteous customer service. For any questions, please contact us at [email protected]. We will get back to you within 24 hours.
Description
Notice:
① Preamplifier needs to work with amplifiers or active devices
② Not PHONO preamp and can’t be used for record players
Features:
3 input modes can be switched freely: PC-USB, 3.5mm and RCA can connect to the computer, TV/DVD/CD, phone( with OTG function) and other player for lossless audio. No drive is needed.
The output end can connect to the digital amplifiers, active multimedia audio devices
With treble and bass adjustment function, users can adjust it according to their own listening style.
With corresponding indicators of different input mode, you can clearly and intuitively see the kind of input mode.
Compact design and exquisite appearance, gold-plated terminal, almost with no background noise.
Parameters:
Tube Mode: 6N3
Output level: 5.4Vrms
THD: 0.02%
SNR: -110 db
Frequency response: + / -2 (20hz-20khz)
Input interface: pc-usb, RCA, AUX line input
Output interface: RCA
Operation mode: button, high-bass knob, volume control knob
Power Supply: DC 12V / 1A
Color: black/silver
Size: 130x140x33 mm / 5.12×5.51×1.30 in
Net weight: 0.58 kg / 1.28 lb
Packing List:
1* HiFi Tube Pre-amplifier
1* Power Supply
1* USB Cable
7. Gulakey DIY Hi-Fi Pre-Amplifier Stereo Can Adjust Output Volume Amplifier Board Preamp Douk Audio Amplifier Board 6N3 Vacuum Valve Tube Spot Steuermodul
Feature
- Classic tube design, optimization line Tube design can be replaced.
- DC12V Power supply, it is easy to find a suitable power source.
- Unique boost mode, the high voltage power supply, power supply mode is superior to common.
- Aluminum alloy shell, durable classic.
- Can be used with digital amplifier analog amplifier, active speakers.
Description
Specification:
Color: Silver
Material: Aluminum
Size: 120 x 110mm
Power: DC12V 2A
Frequency response: 20HZ (-0.2DB) ~ 20KHZ (-0.2DB)
SNR: ≥100DB
Input Sensitivity: 300 ~ 2000MV
Output: 3000MV
Packing includes:
1 x Preamp
2 x 6N3 Tube
1 x Power Supply
Any issue at all, just let us know and we’ll fully refund your order.
8. Nobsound SMPS Class A Pure Vacuum Tube Headphone Amplifier; HiFi Preamplifier; USB Audio Decoder DAC
Feature
- This is Nobsound’s newest headphone amplifier in 2017. It adopts a Switching Mode Power Supply(SMPS), which can be used globally and ensures its pure sound output.
- Support multiple functions. This can be used as a headphone amplifier / preamplifier / USB audio decoder DAC.
- It is a pure vacuum tube headphone amplifier. The two 6E2 are for signal level indication. The two 6N3 and the one 6N5P are for SRPP voltage amplification and cathode output separately of both channels.
- The DAC part is consisted of a USB decoding chip(CM108) and an independent chip(TDA1305T). It supports USB 2.0 and has a excellent performance in its sound output.
- With its solid classic shell and 5 vacuum tubes, you will be abstracted by its beautiful and elegant appearance especially while it’s working.
Description
Replaceable tubes:
For 6N3 — 6A8Q, 2C51, 5670, 5185, 6385, 6185, WE396
For 6N5P — 6AS7G, 6080, CV2523, CV2984, CV5008, CV8032, CV10322, CV8216, CV8614, 6520, ECC230, A4475, 6080WA(WB), 5998, 421A, 7236, 6H13C, 6082, 6528
Parameters:
Tubes: 6E2×2 / 6N3×2 / 6N5P×1
Impedance: 24-600Ω
Output power: 1.2W (600Ω)
Output level: max 50v RMS
Output frequency response: 20Hz to 20KHz – 3dB
Output signal-to-noise: >100dB “A” – WTD
Total harmonic distortion: < 0.008%="" 20hz="" to="">
USB input: CM108 (support USB2.0)
DAC: TDA1305T
Line input: 1Set Stereo L/R RCA
Line output: 1Set Stereo L/R RCA
Stereo headphone output: 6.35mm socket
Support system: Win 2K, Win XP, Vista, Win 7 (32/64), Win 8, Mac OS X
Static power: 35Watts
Size: 230 * 170 * 180 mm / 9.06 * 6.69 * 7.09 in
Net weight: 3.16 kg / 6.97 lb (4 kg / 8.82 lb with package)
Package includes: Headphone Amplifier ×1
Power cord ×1
USB cable ×1
6.5mm to 3.5mm Adapter Plug ×1
9. Mini 6N3 Vacuum Tube Preamplifier HiFi Stereo Audio Preamp
Description
Parameters:
Output impedance: 10KΩ
Harmonic distortion: THD≤0.01%
SNR: ≥100dB
Input Sensitivity: 300mV-2000mV
Frequency Response: 20Hz-20kHz
Power supply: DC 12V 2A
Size: W113*D123*H33 mm
Weight: 0.64Kg
Power supply:
Input: AC 100V-265V (50Hz/60Hz)
Output: 12V/2000mA
Package includes:
1× preamp
2× 6N3 tube
1× power supply
Conclusion
By our suggestions above, we hope that you can found Douk 6N3 Vacuum Tube Preamplifier for you.Please don’t forget to share your experience by comment in this post. Thank you!
