Pro-Ject Tube Box S3 B - Pro-Ject

Audiophile tube warmth
The Tube Box S3 B is an audiophile phono preamplifier that brings true analog warmth to your vinyl playback. It features a fully symmetrical and discrete gain stage, balanced 5-pin mini XLR input, and balanced XLR outputs.

Available in silver or black and made in Europe, the Tube Box S3 B is a compact yet powerful upgrade for any serious vinyl setup.

Cartridge loading options
Large ranges from 40dB up to 65dB are possible. A fully balanced design makes all the difference here. You can perfectly match it with a wide variety of cartridges and integrate it into the rest of your HiFi system, matching the volume levels accurately to other sources like CD players or streaming devices. The loading options for MM and MC are designed so that the widest array of cartridges will work perfectly with the Phono Box S3 B. Ultra low values like 50 pF or 10 ohms allow you to account for special situations, for example sub-ideal higher capacitance cables. Each input settings are stored in the memory. The Tube Box S3 B always has you fully covered.

”B“ stands for balanced
The symmetrical design is the real standout feature! Connect your turntable with the 5-pin mini XLR cable & profit of the balanced signal path. Symmetrical, or also called balanced, transmissions consist of a hot and a cold (also called + and -) signal. Both signal chains effectively carry the same musical information. A true balanced gain stage can now extract the final musical information out of the +/- signals and subtract, remove, all noise that could potentially be added along the transmission. As there are two separate signal chains, we also needed two individual amplifier sections. Definitely unseen in this price range & the best and cleanest amplifier for your phono signal!

High-End Features: For the Entry-Level
Steel & aluminium casework. Fully discrete & symmetrical gain stage. Balanced in & outputs. Cartridge loading options on front panel.

True Balanced: Unleash the full power
Tube Box S3 B is ready for our new True Balanced Connection. With one of our new True Balanced phono cables and an MC cartridge you'll hear details and dynamics, previously exclusive to only the most expensive phono stages.

Handmade in EU: Since 1991
Made in Europe by technicians, engineers and designers with decades of experience. Expert craftsmanship. Sustainable products with a long lifetime. Audiophile audio performance.

What to expect in the box:

• Tube Box S3 B

Product Details:

• Tube assembly: 2x ECC83 (12AX7)
• Input impedance: 10, 50, 100, 1k, 47k ohms
• Input capacitance: 50, 150, 300, 400 pF
• Gain (+ 6dB using XLR Out sockets): 40, 45, 60, 65 dB
• Signal / Noise ratio MM (40dB): 97dBV, 105dBV - 'A' weighted
• Signal / Noise ratio MC (60dB): 83dBV, 88dBV - 'A' weighted
• THD at 1 kHz: <0,005% MM, < 0,01% MC
• THD (20Hz-20kHz): <0,1% MM, < 0,03% MC
• RIAA-equalization curve accuracy: <0,4dB / 20Hz - 20kHz
• Subsonic filter: at 20Hz with 18dB/octave
• Input: 1x 5-pin mini XLR / 1x pair RCA phono sockets
• Line-level output: 1x pair RCA, 1x pair XLR
• Power supply DC: 18V/1000mA
• Power consumption: 18V/800mA DC, <0.5 W in standby
• Dimensions: 206 x 81 x 153 (164 with sockets) mm (W x H x D)
• Weight: 1010g without power supply

Audiolab Stereo & Video Center