Project Pre Box RS


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Project Pre Box RS

The design philosophy behind the Pre Box RS is to offer a highly capable, sonically accurate input switching and high-performance audio preamplification. This model sits at the height of the Box Design preamplifier models as its flagship model, utilising a magnificently rigid cabinet, built with substantial weight for anti resonant functionality, dramatically reducing any potential vibrations. 

The capacitors within the Pre Box RS are LOW ESR and utilise a Class A operation, eliminating distortion and offering a rich and detailed signal for your hifi system. An IR remote is included with the unit for easy operation


 Tubes 2 X ECC88 (6922) 
Frequency Response  20Hz 0 50kHz (0dB/0.08dB) 
Noise Floor  -95dB (A Weighted) 
Total Harmonic Distortion  0.06% 
Gain  12dB (18dB using XLR outputs) 
Pre-Out  1 x pair of RCA/Phono
1 x pair of XLR 
Line-Level Inputs  1 x pair of RCA/Phono
1 x pair of XLR 
Input Impedance 150kOhms
Outboard PSU  18V / 1A DC 
Power Consumption  700mA AC, <1W in Standby 
Dimensions in mm (Weight x Height x Depth)  206 x 72 x 200 (including sockets) 
Weight  1100g (without PSU) 

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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

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