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Product Highlights
Versatile Phono Input
Douk Audio T4 Plus offers a range of input impedance options, from 10Ω to 1KΩ, ensuring compatibility with various turntables and delivering a pristine, noise-free audio experience.
Multi-Device Compatibility
With a 3.5mm AUX input, this preamp can amplify audio from smartphones, tablets, PCs, and MP3 players, enhancing sound quality and making it a versatile addition to any audio setup.
Vintage Aesthetics with Modern Performance
T4 Plus combines a retro tube design with a VU meter, creating a visually stunning piece that evokes nostalgia while providing a dynamic and rich HiFi sound.
Premium Tube Amplification
Equipped with US JAN5654 tubes, this preamp enhances music detail and warmth, offering superior sound quality, especially in vocal clarity, compared to the 6J1 series.
Customizable Sound Experience
The pluggable tube socket allows for easy tube rolling, enabling users to tailor the sound signature to their personal preferences.
High-Performance Headphone Output
The built-in headphone amp circuit (2*NE5532) is designed to drive a wide range of headphones from 32 to 300 ohms, providing a first-class listening experience with an unbeatable cost.
Compact Size with Big Performance
Despite its mini size, T4 Plus boasts a solid aluminum alloy construction, gold-plated terminals, and a sophisticated design that makes it a high-performance, elegant addition to any HiFi system.
Panel Introduction
Warm Tips
- 3.5mm AUX input with priority, please make sure the AUX cable has been pulled out if want to use MM/MC phono input.
- Stereo RCA and 3.5mm headphone jack can output at the same time, and the knob also controls the volume of two outputs simultaneously.
- Upgraded Version: Add a VU meter adjustment on the side panel, easily to adjust its sensitivity to match well with different input signals and achieve better visual effects of VU meter.
Packing List
- 1*T4 PLUS Preamp
- 2*JAN5654 Vacuum Tube
- 1*DC 12V Power Adapter
- 1*3.5mm to RCA Cable
Douk Audio T4 PLUS
Parameters
AUX IN
- AUX input level: 0.775V
- RCA max output level: 1.5V
- Frequency response: 20Hz-20KHz (±0.3dB)
- S/N ratio: ≥110dB; THD: 0.2%
Phono IN
- Phono input level: 0.005V
- RCA max output level: 300mV (MM) / 3V (MC)
- Frequency response: conforms to RIAA characteristics (±3dB)
- S/N ratio: 71dB; THD: 0.8%
- Audio input: MM/MC phono / 3.5mm AUX
- Audio output: stereo L/R RCA / 3.5mm headphone jack
- Max output power of headphone jack: 150mW@32Ω
- Matched headphone impedance: 32-300Ω
- Working voltage: DC 12V
- Dimensions(W*D*H): 50*137*146mm / 1.97*5.39*5.75in
- Package dimensions(W*D*H): 300*230*65mm / 11.81*9.06*2.56in
- Net weight: 640g / 1.41lb; Package weight: 1000g / 2.20lb
Raul Melendez
Reviewed in the United States on February 19, 2025
I love this preamp , have Russian tubes on it and it's clear as a bell. The VU Meter is important because you can balance the amplifier volume with the preamp volume. This keeps distortion out and maximize your turntable sound.
W. Healan
Reviewed in the United States on April 6, 2025
I love this preamp. I have had it about a year. Paired with a vintage Denon DP47F turntable and an Onkyo TX-NR5007 receiver. Comes with GE tubes. Sounds as good if not better than my NAD preamp, and looks a whole lot cooler. Great value. Highly recommended.
Troy
Reviewed in the United States on April 22, 2025
I really wanted this preamp to work so much so that I purchased 2 times. It has all the load settings that I could ever need for moving coil cartridges but doesn't sound good to me. I tried playing some records with this and they sounded like crap. The music sounded really bad to me and wasn't enjoyable. I replaced this preamp with my mani 2 and the music sounded good again. I didn't try the moving magnet setting. I have a lot of nice sounding preamps but this just wasn't one of them. I have a yaqin ms-12b chinese tube preamp and it sounds really good though it was much more expensive. Just do your research before buying a preamp because there are a lot of good ones.
CL
Reviewed in the United States on August 9, 2024
Bought this unit with high hopes that it would sound great. It is very good, not great. On the positives it has a very solid metal build with a great and useful volume control to adjust gain. The supplied tubes are legit GE JAN ruggedized tubes. In MM mode, there is no audible hum or hiss. And it has a usable MC mode, with some slight hiss and usable adjustable resistive loadings. The sound has some tube warmth with a nice amount of punch and dynamics. The only issue is that the high frequencies on this unit are a bit elevated and not as neutral with some higher end phono preamps. The highs have a slight bit of graininess. I would say that the Mani 2 is a more refined unit more suitable for high end systems. If you have bookshelf speakers or an amplifier that is on the mellower side this may be for you. It is actually a really good value for the price, but costlier preamps will give a more refined sound.
iyqyqr
Reviewed in the United States on August 3, 2024
Not everyone needs a $500 Phono Preamp, or a $200 headphone amp. This thing is great. I was hesitant to buy it because several mentions were made that it wasn't a great headphone amp. I don't know what these people are doing to their ears, but I couldn't barely move this beyond the on/min notch on the volume control. It's LOUD in my Sennheiser HD650s.I have this hooked to a vintage SL1300, and I'm really, really impressed with it for being right around $100. It looks good, it allows me to have a second little listening area in my house, and I'm just thrilled with it.
wwarchitect
Reviewed in Canada on August 21, 2024
By-passed the built-in preamp of my turntable and use the phono out through the T4 plus and what a treat! The sound coming out has much more details. I was going to upgrade my cartridge first but glad I went for the preamp upgrade instead. Also the built quality was well above its price suggested. The only slight downside (that really is not an issue) is that the factory box it came in was damaged and tape up, But the contents were all there and fine including the vacuum tubes. In conclusion, money well spent!
Eric
Reviewed in Canada on December 22, 2024
The media could not be loaded.
Luis G Sanchez
Reviewed in Mexico on November 4, 2024
Es una pieza pequeña y funcional. Su look retro es lo que me gusto. El uso de un bulbo permite suavizar el sonido de los discos y le da un color diferente vs. CD's. Por el precio, no esperen un sonido high-end; no obstante es razonablemente aceptable. Tiene un control de volumen que permite regular la salida. Es de fácil conexión. Se puede utilizar tanto con las tornamesas que tienen la salida para Phono-Only, como las que permiten ajustar a Auxiliar o Phono. Muy recomendable si se encuentran en espacios pequeños.
Stephen Bonner
Reviewed in Canada on January 3, 2024
The media could not be loaded.
Jesus S
Reviewed in the United States on June 26, 2023
We recently decided to pull our fancy LP turntable out of storage after 30 years sitting idle. We got caught up with the recent interest of LP albums and it sparked a strong interest within ourselves. I had previously given away all my receivers, amplifiers, and speakers away. I decided to keep the turntable and realized in 2023. I needed a quick refresher course on what I needed to play LPs with what I currently have. I was against purchasing a receiver or powered speakers. I have a Bose IV Soundtouch System and a Sony Soundbar.Lesson 1 - Get a Preamp! I did an exhaustive review of entry and mid-level preamps. I set my limit at $100 and this Douk Audio T4 Plus Vacuum Tube Phono preamplifier was the Chosen One! It looks amazing with the needle movements and soft casting amber lights. The red volume control knob is a nice contrast and feels amazing as you dial it with your fingers. The two vacuum tubes included were a bonus and happy it still fell into my budget.Hooking this between my Denon DP-71l turntable and the Bose Soundsystem was very straightforward. Just need to plug in the RCAs and ground to the Phono In - Douk T4. And then Line Out RCAs to a 3.5mm plug inside the Bose. Once I had the settings set on the Bose, put the needle onto the track and enjoy!What I immediately noticed is the volume is low. I cranked up the volume knob on the preamp to the max and then raised the volume on the Bose. I am not sure if that is how it should be but it works in the meantime. I did notice the music sounding better after 30 minutes or so since the tubes needed that timeframe to assimilate all the signals for deeper and warmer tones.I am also ecstatic the preamp has its own power on/off setting. This Doul Audio T4 looks stylish and classy right alongside the rose wood of my turntable.Definitely happy we jumped back to listening to our LPs with a little help of this preamp.5 Stars!One issue - I also received the preamp in an unsealed box. So weird. At least nothing fell out and all seems to be in order. Have a great one to you all!
Bri B
Reviewed in the United States on May 10, 2023
As at least one other reviewer has noted, the box came UNSEALED. No tape, no gray bag, nothing. I verified I received all the arts that I was supposed to (preamp, DC supply, audio cable, 2 tubes, manual). However, the DC supply had a European plug (round pegs), not at all what we use in North America. I happen to have a stash of wall warts that matched the requirements of the preamp, so I was lucky.As for the sound, well I'm using it to digitize old 78 RPM records direct from a phono cartridge. So for me, it sounded fine. Plenty of headroom, no audio distortion. VU meter worked fine, although one meter for a stereo preamp is a little weird, but the purpose seems to be little more than eye candy.I am using the tubes that came with the preamp, but I may try other types of tubes to see if it really makes any difference.Physical construction is very good, feels solid. One small plus is the cartridge ground screw is the kind with a very small hole that accepts a 22 AWG stranded wire typical of the ground wires that come with most turntables. So it's not just a screw that is hard to get the wire to stay on.Overall I think this is a good value for the money. Just wish the vendor would seal the box before shipping, and provide the correct type wall wart (DC supply). Thanks for reading.
Steve C
Reviewed in Canada on January 24, 2023
This came well packaged with the preamp, 2 NOS tubes, power adapter and cord, and audio input Y-cable.The 2-prong power adapter is 90 degrees for outlet clearance and the cord is long for good placement. A gold plated Y-cable is included for plugging the stereo RCA connector into the mini-jack "Aux In" port in the back. Plugging this cable in automatically disables the phono input. This can be annoying if you need to switch between the two sources but I am only using this preamp for my turntable so the Phono input is all i will need.The casing is all metal and extremely well made. The control knob on the front is all aluminum and machined with a knurl. The color is a gorgeous industrial grey with a great contrasting red knob with machined accents. The knob is very smooth with a nice click for on/off. The bottom of the case is smooth and could use some silicone pads to help with sliding and vibration isolation.The VU meter is bright and beautiful to watch with a crystal clear lens and adjustable sensitivity to get just the right amount of bounce. The color matches the tubes perfectly.Comes with 2 NOS GE 5654W tubes. These were clean, with good contacts and inserted into the sockets easily. Others have already rolled these tubes with other tubes and heard a difference in sound so they are functional and not just show. I switch to Siemens or Telefunken 6AK5s for some more high-end and a larger soundstage.i have paired this with my Ortofon 2M Blue so I set the jumpers to MM. but this preamp gives me the option to upgrade to a better MC cartridge in the future and custom set the resistance Ohm load.Overall a very nice tube preamp if you are looking for a warm tube sound with retro looks and adjustable MC settings. Plus a really cool VU meter.
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