Radius 4 Silver - MasterSounds - Premium, boutique, rotary, analogue, affordable DJ Mixer


Radius 4 Silver

Regular price £1,195.00 Sale

**We are proud to have a limited number of units in stock for next day dispatch if ordered before 2 pm GMT** 

We hand build all our DJ mixers, FX units & LinearPOWER accessories to order, via analogue legend Andy Rigby-Jones & his small team of ultra passionate audio professionals in rural Cornwall with skill, care & attention to detail.



Product Description

The new generation Radius 2 and 4 offers clean, open, and dynamic sonic quality on both LINE and RIAA inputs, as well as improved usability. Both mixers feature easy-reading analogue VU meters, a responsive Master EQ/Isolator, a smooth natural sounding hi-pass filter on each channel, and an AUX send/Return system with insert button for easy integration of external effects, including MasterSounds own FX unit. Radius 4 also includes 2 mic inputs, selectable via the rear panel.


“The redesign challenge meant going back to the drawing board to see where we could simplify the circuitry without impairing performance. For instance, the Split Composite Passive RIAA stage remains identical to the previous generation but we have simplified the post-fader circuitry. The biggest change was to the internal construction and PCB board shapes, where we have optimised them for maximum efficiency through our in-house fabrication plant which has made them a lot easier to manufacture.  What we haven’t compromised on is the quality of the components used, and the third-generation mixers all feature Alps pots/switches, close tolerance resistors/capacitors, and Panasonic electrolytics. I am very happy with the result of the engineering changes, and these compact mixers offer exceptional value for money,” explains Union Audio’s Andy Rigby-Jones.

“The Radius 2 and 4 hold a special place in my heart, it’s the mixer Andy and I began our audio journey with, and one that gives the user a really unique way of blending records. Both Radius 2 and 4 are desktop products, with a small footprint, which makes them perfect for home, touring, and club use, or all three! It was the right time to re-engineer Radius, giving more DJs the opportunity to experience our wonderful product, at a price unseen given each mixer's quality of build and fidelity of sound,” concludes MasterSounds founder, Ryan Shaw.

Shipping & Payment




Please Note -  Customers outside the UK may have to pay import duty on receiving goods, MasterSounds specifies the full purchase amount on all shipping and customs documents.

PayPal Express Checkout

We now offer the facility for customers to pay for their orders with PayPal Express Checkout. This allows you to take advantage of the various credit options supplied directly by PayPal to you as the customer. MasterSounds is not the proprietor of any credit agreements.

Warranty & Returns


All of MasterSounds DJ mixers and FX Units come with a limited 2-year international warranty. The warranty applies only to the original purchaser and is not transferrable. Please see section 5 of the product manual (digital copy below)

Return & Exchange Policy

If you are not completely satisfied with your MasterSounds purchase please contact us within 14 days of receiving your item to discuss a refund or exchange. Refunded and exchanged items must be unused and in all original packaging. No returns or exchanges are permitted on custom orders. The buyer is responsible for all return shipping costs.


Do you have any mixers or FX units in stock? 

All of DJ mixers and FX units are hand-built to order. Each product will have an estimated build time above the tab menu. 

Our exclusive retail outlet is Phonica Records in London, who keep a limited stock of our DJ mixers, FX unit, TRBxM and turntable weights. Please check the Phonica website for more details or give them a call.

Can MasterSounds mixers or FX Unit be used where I live?

Each of our mixers & FX Units is supplied with a compact external switch mode power supply, enabling use anywhere in the world with the correct IEC lead, which we supply for your country of residence. Touring DJs can use our mixers anywhere in the world, simply by changing the IEC lead relevant to the country the unit is shipped to. The FX Unit comes with a portable power supply with several types of plug configuration, enabling use anywhere in the world.

Do you ship to my location?

We ship items to locations across the world on a daily basis via signed courier service, so the likelihood is that we will be able to ship directly to you.

We send all of our audio accessories via Royal Mail tracked & signed.

Our DJ mixers & FX units are all sent via UPS courier service.

VAT, do I have to pay for it?

VAT is automatically applied to any purchase made within and shipped to the UK. Orders made outside the UK do not have VAT applied, but will be subject to local import taxes on delivery. If you are unsure how much import tax will be payable, please contact your local customs office who will be able to advise.

Technical Specification

 Power Requirement

(Each mixer is supplied with a compact switch-mode power supply for anywhere in the world and we supply the correct IEC lead for your country).

External Power Supply Universal 90V – 265V AC 50/60Hz

18V 18W Max

DC Internal Power Rails +/- 18V DC

 Audio Performance

 Residual Output Noise <-95dBu 20Hz to 20kHz un-weighted

Mix noise Unity Line IN to Mix Out <-88bBu 20Hz to 20kHz un-weighted

Distortion THD+N 0dBu = 0.0025% Line IN to Mix OUT

Distortion THD+N +10dBu = 0.001% Line IN to Mix OUT

Dynamic Range >115dB

Maximum Signal Level ±27dBu

Frequency Response 10Hz – 100kHz +0.5/-2dB

Headphone Output Power 800mW RMS into 32 Ohms


 Channel High-Pass Filter Range 10Hz to 1.5kHz

Master EQ/Isolator Cut/Boost OFF to +12dB

Master EQ/Isolator Crossover Fc 350Hz and 3.5kHz

RIAA Accuracy Within 0.25dB 40Hz – 20kHz.


W = 350  L = 190 H = 84 (mm)

**PLEASE NOTE** This is the Faceplate size. Not including knobs, Sockets, Headphone Jack, Cabling ETC...

Weight = 3.3KG

Packed Dimensions

W = 480  L = 270 H = 200 (mm)

Packed Weight = 4.7KG


**MasterSounds reserves the right to change the specification without notice. **