Pro-Ject Tube Box S3 B
- Free Mainland UK Shipping on orders over £100
- Official Hi-Fi Retailer since 1973
- Usually in stock and dispatched in 1-5 working days
We offer free delivery on all orders over £100 to mainland UK. Orders under £100 are subject to a £5 shipping charge.
Delivery is available across mainland UK. If you are located outside mainland UK and would like a shipping quote, please get in touch before placing your order.
We aim to dispatch in-stock items as soon as possible provided that we physically have the stock - but please note that sometimes we have to order from our supplier for certain products, in which case delivery should take place within 1-5 working days of the order being placed.
Tracking details or estimated delivery timescales will be provided once your order has been processed. If there are any delays due to stock availability, we will contact you as soon as possible with the option to wait or receive a full refund.
Please note that certain products may be subject to specific distance selling or delivery regulations. If you are unsure about a product or its delivery terms, we recommend contacting us before purchase.
You can cancel your order within 14 days of receiving your goods, in line with UK distance selling regulations. Once you’ve notified us, you have a further 14 days to return the item. Please contact us by email, phone or in writing before sending anything back.
Items must be returned in original condition and packaging, including all accessories, manuals and any promotional items. The cost of return is your responsibility and we strongly recommend insuring the goods, as refunds cannot be issued for damaged or incomplete returns. If items show excessive handling, are missing components, or cannot be resold as new, a reasonable deduction may be made.
Please note that used headphones (for hygiene reasons) and custom or special-order items cannot be returned. If you need assistance arranging a return, we’re always happy to help.
Product Summary
The Pro-Ject Tube Box S3 B is a compact tube phono stage designed for customers who want more analogue character and more system-matching flexibility than a basic entry-level phono preamp can usually offer. It is especially attractive for vinyl listeners who want the warmth and presentation of valves, but also want proper cartridge matching and balanced connection options in a neat, modern chassis.
A big part of the appeal is the way it combines tube sound with real-world adjustability. The Tube Box S3 B works with both MM and MC cartridges, with front-panel control over loading and gain so it is much easier to tailor the phono stage to your cartridge and system. The balanced mini XLR input and balanced XLR outputs also make it a strong option for customers building towards a lower-noise, more fully balanced analogue setup.
It is also designed to feel like a proper hi-fi upgrade rather than just a feature box. The fully symmetrical and discrete gain stage, aluminium chassis and tube output stage all help the Tube Box S3 B feel more serious and more refined in use. For customers wanting a compact valve phono stage with balanced capability, strong flexibility and genuine musical character, the Tube Box S3 B is an excellent choice.
Key Benefits
- Tube output stage is designed to bring greater warmth, texture and musical involvement to vinyl playback
- Works with both MM and MC cartridges, making it easier to partner with a wide range of turntables and upgrades
- Balanced input and balanced XLR outputs give you a clearer route into lower-noise analogue system building
- Front-panel loading and gain controls make cartridge matching much easier in day-to-day use
- Fully symmetrical and discrete gain stage is designed to support cleaner and more refined performance
- Switchable subsonic filter can help reduce unwanted low-frequency rumble
- Compact dimensions make it easier to fit into smaller hi-fi systems and shelves
- Aluminium casework helps shield the circuitry from outside interference
- 2 years manufacturers warranty, extended to 3 years if registered with Pro-Ject within 4 months of purchase
Technical Specifications
Phono Stage Details
- Product Type: Balanced audiophile tube phono stage
- Tube Assembly: 2 x ECC83 / 12AX7
- Compatible Cartridge Types: MM and MC
- Input Impedance: 10 / 50 / 100 / 1k / 47k ohms
- Input Capacitance: 50 / 150 / 300 / 400 pF
- Gain: 40 / 45 / 60 / 65 dB (+6 dB using XLR output)
- Signal to Noise Ratio: 97 dBV / 105 dBV A-weighted (MM), 83 dBV / 88 dBV A-weighted (MC)
- THD at 1 kHz: Less than 0.005% MM / less than 0.01% MC
- RIAA Accuracy: Less than 0.4 dB / 20 Hz - 20 kHz
- Subsonic Filter: 20 Hz at 18 dB per octave
- Inputs: 1 x 5-pin mini XLR, 1 x pair RCA phono sockets
- Outputs: 1 x pair RCA, 1 x pair XLR
- Power Supply: 18 V / 1000 mA DC
- Power Consumption: 18 V / 800 mA DC, less than 0.5 W in standby
- Colour Options: Silver or black
- Made In: Europe
Weight & Dimensions
- Dimensions: 20.6 x 8.1 x 15.3 cm (W x H x D)
- Dimensions including sockets: 20.6 x 8.1 x 16.4 cm (W x H x D)
- Weight: 1.01 kg without power supply
What’s in the Box
- Pro-Ject Tube Box S3 B phono preamplifier
- Power supply
- Product documentation
