Project Head box S headphone amplifier


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Project Head box S headphone amplifier

ProJect's Head Box S follows the same design philosophy and mechanical integrity implemented within all of Project's Box Design products. The Head Box S enables the music enthusiast to enjoy their music collection privately, optimising and enhancing the headphone listening experience to provide a realistic and precise sound reproduction. 

The high quality amplifier modules found within this unit provide a clean and powerful level of power to your headphones, bringing out even the most sensitive sounds and smoothing the more intense or demanding elements to offer a balanced and accurate stereo image.


Power Output  330mW/30ohms, 60mW(300ohms 
Headphone Connection  >30ohms 
Signal to Noise Ratio  95dB (112dB - A weighted) at full output 
Frequency Response  30Hz - 20kHz/00.05dB (10Hz - 120 kHz/-1dB) 
Total Harmonic Distortion (IMD)  0.003% (0.002%) 
Gain  11dB 
Headphone Jack  3-pole 1/4" coaxial jack 
Line-level Output  1 x pair of RCA/Phono sockets 
Outboard Power Supply  18V/500mA DC 
Power Consumption  18V/100mA DC 
Weight 600g
Dimensions in mm (Width x Height x Depth/Depth with Sockets)  103 x 36 x 104/109 

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Providing your item is in stock, the order is usually dispatched within 24 hours. Please remember that postage and packing is completely free for orders over £50*. Out of stock items will be dispatched as soon as they become available, out of stock items can take between 4 to 21 days for dispatch.

Deliveries usually take 1-3 working days. The majority of orders are sent via our couriers'; Interlink Express on a next-day-delivery service. Smaller, low value or light-weight items are normally posted using Royal Mail Recorded or Royal Mail Special Delivery.

Once your product has been dispatched, you will be notified via email and sent a unique consignment number, you can use this number at to check the status of your delivery. If you have provided a mobile telephone number, Interlink's Predict service will notify you by text (and email) of a one-hour delivery window. If the window they suggest is inconvenient, you can change the date of delivery to a later one via text or email.

*We ship free of charge to mainland UK addresses, excluding the Scottish Highlands or 'Out-Of-Reach' Scottish locations. Please consult the post-codes below to see if your location falls within this category. If you are still unsure, please contact us on 01432 354921. We also ship to Northern Ireland, Channel Islands, Scilly Isles, Scottish Isles and Scottish Highlands, however delivery to these locations will incur a charge and can only be sent via a 2-day service.

Shipping CostsMainland UK (Next-Day)Offshore/Out-of-reach (2-day)Northern Ireland, Channel Islands, Isle of Man, Scottish Islands, Scilly IslandsRepublic of Ireland (2-day)
Under £50 Orders £7.50 £12.50 £15.00
Over £50 Orders FREE £19.99 £29.99
Surcharge Orders £50.00 £69.99 £79.99
Saturday Delivery £12.99 N/A N/A
Sunday Delivery £12.99 N/A N/A
Saturday by 12 Delivery £35 N/A N/A


Post codes exempt from the free delivery service include:

Scottish Highlands Post Codes: AB30-38, AB41-42, AB44-56, FK17-99, G83, IV1-28, IV30-39, IV52-54, IV63, KW1-14, PA21-33, PA34-40, PH15-26, PH31-41, PH49-50
Islands Post Codes: HS1-9, IV40-51, IV55-56, KA27-28, KW15-17, PA20, PA41-49, PA60-78, PH42-44, ZE1-3
Northern Ireland: All BT postcodes
Channel Islands Post Codes: JE, GY
Scilly Isles Post Codes: TR21, TR22, TR23, TR24, TR25