this is my wharfedale EVP-X18pb amplifier module for my subwoofer. the module went faulty, the sound signal was distorted. I sent this amplifier to MILTROTECH for repair. They were able to fix it and get it all working. the actual service center for wharfedale took 3 weeks and was not able to fix it. I think its due to the model is old/phased out. MILTROTECH facebook page https://www.facebook.com/Miltrotech?mibextid=zLoPMf MILTROTECH is very responsive and accomodating. they can repair and fix your defective lights and sound equipments. check their facebook page which shows repair of branded and expensive DJ gears/professional sound system equipments. here is a five star review for you MILTROTECH!! I am sending this as a review, promotion and recommendation of your services.