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DOUK Audio T4 PLUS Tube Phono Preamplifier
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DOUK AUDIO T4 PLUS Tube Phono Preamplifier JAN 5725W Headphone Amplifier NE5532
The Douk Audio T4 is a JAN5725W tube MM/MC phono preamplifier that also features headphone amplification with NE5532 OPAmps. Versatile, it incorporates an input impedance switch (1KΩ/470Ω/220Ω/100Ω/47Ω/22Ω/10Ω) making it compatible with most turntables and cartridges. The JAN 5725W tubes, coupled with a TL071+JRC2068 phono preamplifier stage, deliver a warm and smooth sound when listening to vinyl via the RCA line output. The NE5532 OPAs provide considerable power for the 3.5mm headphone output, which is therefore capable of driving headphones and IEMs with an impedance of 32 to 300 ohms. In terms of design, DOUK has opted for singularity with its T4 PLUS, which has a vertical layout. There is also a VU meter for a very pleasing vintage effect.
DOUK AUDIO T4 PLUS: MM/MC compatibility
The DOUK Audio T4 PLUS is a phono preamplifier that offers a high level of compatibility thanks to its input impedance switch. It is compatible with MM/MC cartridges and can adjust its input impedance to a range of values (1KΩ/470Ω/220Ω/100Ω/47Ω/22Ω/10Ω) to ensure a line level output in all circumstances.
DOUK Audio T4 PLUS: high-quality components
TL071+JRC2068 phono preamplification
The phono preamplification stage of the T4 PLUS uses TL071 JFET and JRC2068 op-amps for low noise and low distortion performance.
JAN 5725W tubes
JAN 5725W tubes deliver a warm, smooth sound, revealing the details of your music with transparency and dynamics.
NE5532 headphone amplification
The T4 PLUS uses NE5532 op-amps for its headphone amplification, allowing it to drive a wide range of headphones and IEMs. It delivers up to 150mW into a 32-ohm load.
DOUK AUDIO T4 PLUS: a unique aesthetic
With its vertical format and vintage VU meter, the T4 PLUS stands out with its unique and elegant aesthetic. Its gold-plated connectors and sturdy casing are also noteworthy.
DOUK AUDIO T4 PLUS overview
| 1 | Vumeter |
| 2 | Volume control |
| 3 | 3.5mm headphone jack output |
| 4 | MM/MC setting and input impedance |
| 5 | JAN5725W Tubes |
| 6 | Phono input |
| 7 | 3.5mm AUX jack input |
| 8 | RCA line output |
| 9 | 12V DC power supply via DC jack |
Technical characteristics
| Specifications | |
|---|---|
| Product type | Tube phono preamplifier / Headphone amplifier |
| Tubes | JAN5725W |
| Phono preamplifier | TL071+JRC2068 |
| Headphone amplification | AOP NE5532 |
| Inputs | 1x MM/MC phono input 1x 3.5mm AUX jack input |
| Outputs | 1x RCA line output 1x 3.5mm headphone jack output |
| Headphone output power | 150mW @ 32 ohms |
| Recommended headphone impedance | 32-300Ω |
| Settings with Phono input | |
|---|---|
| Phono input level | 0.005V |
| Max. RCA output level | 300mV (MM) / 3V (MC) |
| Frequency response | Conforme RIIA (±3dB) |
| SNR | 71dB |
| THD | 0.8% |
| AUX input settings | |
|---|---|
| AUX input level | 0.775V |
| Max. RCA output level | 1.5V |
| Frequency response | 20Hz-20KHz (±0.3dB) |
| SNR | ≥110dB |
| THD | 0.2% |
| General | |
|---|---|
| Power supply | 12V DC |
| Dimensions (WDH) | 50 x 137 x 146mm |
| Net weight | 640g |
| Package | 1x Phono preamplifier 2x JAN5725W tubes 1x 3.5mm jack to RCA cable 1x 12V 1.5A DC jack power adapter |
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