Four Master Products
Four Masters the Independent Car Audio Specialist Network 
We are completely confident that the products we sell will last the distance. So confident in fact, that we offer a free 24-month warranty on all four products - Hertz, Audison, Rainbow, Audio Control, Skinz, Connection and Q+ Speaker Adapters.
Furthermore, any of these products that are supplied and installed by CarAudioStuff Ltd will carry a further twelve months warranty and when we register the serial numbers of you Four product you will automatically get an added bonus, we will subscribe you to the Driving Sounds Club. Not only will you get the peace of mind from having an extra 12 months of warranty cover but you will also receive a monthly bulletin with news and views offers and competition prizes as well as a monthly top five tunes the team at Driving Sounds Magazine think you should be listening to in your car! FREE Issue
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Warning! Products that have not been sourced in the UK cannot be registered and will not be covered by UK warranty terms.
Rainbow BMW E/F Series Front 2-Way Coaxial OEM Upgrade Speaker Set IL-X4E
BMW E/F Series IL-X4EThis series of vehicle-specific speaker systems is as compact as it is powerful..
£139.99
Rainbow BMW F Series Front 2-Way Coaxial OEM Upgrade Speaker Set IL-X4F
The Intelligence Line IL-X4 For F Series BMW's is a 2-Way Coaxial car speaker system designed to..
£139.99
AudioControl 2XS Two Way Electronic Crossover
AudioControl 2XS A state-variable, 18 dB/octave, 2-way electronic crossover designed with a flexibl..
£139.99
AudioControl 6XS Six Way Electronic Crossover
The 6XS does it all. Sharp 24 dB/octave Linkwitz-Riley alignment crossover with remote level contr..
£279.99
AudioControl ACM-1.300 monoblock micro amplifier with accubass®
ACM series amplifiers by AudioControl are the perfect blend of power and features for car audio syst..
£329.99
AudioControl ACM-2.300 two channel micro amplifier
ACM series amplifiers by AudioControl are the perfect blend of power and features for car audio syst..
£349.99
AudioControl ACM-4.300 four channel micro amplifier
ACM series amplifiers by AudioControl are the perfect blend of power and features for car audio syst..
£379.99
AudioControl ACR 3 Remote level control
Add remote level control for your AudioControl processor or amplifier. This is the replacement remot..
£39.99
AudioControl D-4.800 4-channel D-Class amplifier
This high specification, 4-channel D-Class amplifier from AudioControl offers outstanding sonic puri..
£899.99
AudioControl DM-608 6 input, 8 output Digital Signal Processor
Accepts up to six high level, preamp or digital inputs assignable to up to eight outputs. This Matri..
£699.99
AudioControl DM-810 Premium 8 input 10 output DSP matrix processor
Control is everything when establishing a good sound stage in a car and this is exactly what you get..
£799.99
AudioControl DQ-61 6 channel line out converter with signal delay and eq
This powerful signal processor offers the wonderful immediacy of hard controls to a six-channel DSP...
£549.99
AudioControl DQDX 6 Channel Digital signal processor with eq, crossover and signal delay
Designed for maximum sound quality and enhanced audio performance, the DQDX is the latest AudioContr..
£549.99
AudioControl EPIC 160 - In-Dash Car Audio Bass Maximizer
AudioControl EPIC 160 For the best bass possible and a way to measure how loud your system is playin..
£269.99
AudioControl EQL Dual Band-width Equalizer/ Line Driver
The EQL works wonders with any 2 channel audio system: From existing factory installed setups to c..
£279.99