SKU: 78521738575

PRO-JECT PHONO BOX S3 B TRUE BALANCED PHONO PRE-AMPLIFIER

Sale price$314.55 Regular price$349.50
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Ships within 48 hours Β· Estimated delivery Jul 16 - Jul 21

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Description

PRO-JECT PHONO BOX S3 B TRUE BALANCED PHONO PRE-AMPLIFIERHigh End Features at an Affordable Price The Phono Box S3 B is a phono preamplifier that offers a fully balanced design in a neat, small package. Pro Ject have packed this tiny chassis to the brim with high end features. One of those is their new True Balanced Connection. When used in combination with a Pro Ject turntable with a 5 pin balanced output and 5P to XLR cable, you can achieve a totally balanced connection, minimising noise and delivering a

High End Features at an Affordable Price

The Phono Box S3 B is a phono preamplifier that offers a fully balanced design in a neat, small package. Pro-Ject have packed this tiny chassis to the brim with high-end features. One of those is their new True Balanced Connection. When used in combination with a Pro-Ject turntable with a 5-pin balanced output and 5P to XLR cable, you can achieve a totally balanced connection, minimising noise and delivering a breathtaking analogue signal.

Until now, balanced connections were exclusive to the RS range of products. The Phono Box S3 B brings those features to more affordable products.

Fully Discrete and Symmetrical Gain Stage

The new Phono Box S3 B gain stage uses a fully discrete layout. A discrete circuit is composed of disparate electronic components, and individual devices. The amplifier section is built of single parts and doesnβ€˜t use any integrated circuits! That makes for an extended and more costly design process but results in the best sound quality. The fully symmetrical gain stage can optimise the signal-to-noise ratios, feeding the semi-passive, RIAA equalisation stage with a clean signal to work on.

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Technical Specifications

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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): 103dBV, 110dBV - 'A' weighted
Signal / Noise ratio MC (60dB): 85dBV, 90dBV - 'A' weighted
THD at 1 kHz: <0,001% MM, < 0,005% MC
THD (20Hz-20kHz): <0,008% MM, < 0,01% MC
RIAA-equalization curve accuracy: <0,3dB / 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/500mA
Power consumption: 18V/170mA DC, <0.5 W in standby
Dimensions: 206 x 55 x 153 (164 with sockets) mm (W x H x D)
Weight: 930g without power supply

A New Access to High-End Features




Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
  • Except Preorder products are shipped in 48 hours.
  • Delivery to the USA:
  1. Standard Shipping : 3-10 business days
  • If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
  • We offer a 30-day return/exchange service after receiving.
  • Final sale items are not eligible for returns or exchanges.
  • To process your return/exchange, please contact us at [email protected]
  • Please click here for more details>>> Return & Exchange Policy
SKU: 78521738575

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PhilMan79
Dallas, US
β˜…β˜…β˜…β˜…β˜… 5
Nice panels to hide unsightly areas
Color: Black, Pattern Name: Divider
These are nice panels with a modern look to hide those unsightly places in your basement or utility areas and still allow ready access. Used mine in our large laundry room to block the view of the furnace and water heater in lieu of building a wall. The black and white basic pattern blended well with the walls and white appliances and improves the casual look of the room. I would not call construction overly rigid as they will not stand up to rough treatment or childrens areas well.
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Reviewed in the United States on January 29, 2026
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Nancy P.
Dallas, US
β˜…β˜…β˜…β˜…β˜… 4
Looks great, covers space.
Color: Natual, Pattern Name: Divider
Very nice and functional, A bit lightweight and tips over easy. Keep it partly opened out of the way to prevent it falling over.
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Reviewed in the United States on April 9, 2026
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Annachristine
Belleville, US
β˜…β˜…β˜…β˜…β˜… 5
Great screen!
Color: Black, Pattern Name: Divider
This is a great screen! It is sturdy, easy to maneuver and it looks great! You won't be disappointed. It does the job. I am very pleased.
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Reviewed in the United States on March 24, 2026
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emigdio a aguilera
Bozeman, US
β˜…β˜…β˜…β˜…β˜… 5
Great purchase for the price
Color: Cherry, Pattern Name: Divider, Color: Cherry, Pattern Name: Divider
Room separator was delivered in great shape, not broken as other people. It looks really good but please note the materials are fragile. It’s perfect for the place I needed.
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Reviewed in the United States on April 23, 2026
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Cocopuff
Charlottesville, US
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Roomdivide
Color: Black, Pattern Name: Divider
Looks very nice in my room like the height and look. Nicely made.
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Reviewed in the United States on May 28, 2026

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