yeah dont go for the none branded ones they will be rubbish, i was tempted by them but then spent the proper money on mine, it cost £450 and is pioneer so a well known make

also i bought mine from www.caraudiodirect.co.uk
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Red Escort 1.6LX
Then - Red Escort 1.4
Then - Silver Fiesta ST 170BHP
Then - White Fiesta ST MR200+
Now - Mitsubishi Evo IV Forged 2.3 500BHP
and Mondeo Mk3 2.0TDCI