Pro-Ject Head Box S3 B Headphone Amplifier
- 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 £6.50 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 Head Box S3 B is a high-end headphone amplifier designed for customers who want a more serious dedicated amp for both balanced and single-ended headphones. It is a strong option for desktop and hi-fi systems where clarity, channel separation and lower-noise performance matter more than just adding a basic headphone socket.
A big part of the appeal is its fully balanced design. With both RCA and XLR inputs, plus balanced 4.4 mm and 4-pin XLR headphone outputs alongside conventional 3.5 mm and 6.3 mm sockets, the Head Box S3 B is built to suit a wide range of headphone setups while giving customers a clear route into higher-performance balanced listening.
It is also designed to feel like a proper hi-fi component rather than just a utility box. The full aluminium enclosure, strong measured performance and compact casework make it an appealing choice for customers who want a serious headphone amplifier that fits neatly into modern systems. For customers wanting a compact but genuinely ambitious headphone amp, the Head Box S3 B is an excellent choice.
Key Benefits
- Fully balanced topology is designed to deliver greater channel separation with lower noise
- Supports both balanced and single-ended headphones for wider system flexibility
- Balanced 4.4 mm and 4-pin XLR outputs make it a strong choice for higher-end headphone setups
- RCA and XLR inputs make it easier to integrate into desktop and full hi-fi systems
- Strong output capability helps it partner a wide range of headphones confidently
- Compact size makes it easy to place neatly into smaller systems and shelves
- Full aluminium enclosure helps shield the circuitry and gives the unit a more premium feel
- Strong option for customers wanting a serious headphone amplifier with modern balanced connectivity
- 2 years manufacturers warranty, extended to 3 years if registered with Pro-Ject within 4 months of purchase
Technical Specifications
Headphone Amplifier Details
- Product Type: Fully balanced headphone amplifier
- Max Power Output: 480 mW / 8 Ohms, 680 mW / 16 Ohms, 820 mW / 32 Ohms, 320 mW / 300 Ohms
- Headphone Outputs: 3.5 mm, 6.3 mm, 4.4 mm balanced, 4-pin balanced XLR
- Signal to Noise Ratio: Greater than 115 dB A-weighted at 1 kHz
- THD: Less than 0.002% at 1 kHz @ 500 mV input
- Crosstalk: Less than -81 dB at 10 kHz
- Gain: 15 dB / 9 dB (RCA in / XLR in)
- Frequency Response: Less than -0.25 dB at 20 Hz - 20 kHz
- Analogue Inputs: 1 pair RCA/Cinch, 1 pair XLR
- Analogue Loop Outputs: 1 pair RCA
- Headphone Impedance: Minimum 8 Ohms
- Power Supply: 18 V / 1 A DC, 110 - 240 V, 50 / 60 Hz
- Standby Power Consumption: Less than 0.5 W
- Colour Options: Silver or black
- Made In: Europe
Weight & Dimensions
- Dimensions: 20.6 x 5.5 x 15.3 cm (W x H x D)
- Dimensions including sockets: 20.6 x 5.5 x 17.0 cm (W x H x D)
- Weight: 0.95 kg without power supply
What’s in the Box
- Pro-Ject Head Box S3 B headphone amplifier
- Power supply
- Product documentation
