Offering a FREE no obligation quotation for all of our services and a range of flexible payment terms including credit card and lease options - can you afford not to protect your property? Family-run Sonic Alarm Systems are here to help protect your homes with their affordable and reliable services. Sonic Alarm Systems offer a comprehensive range of intruder alarm systems that designed specifically for you and your property. Our range includes everything from domestic to commercial, audible and 24 hour monitored systems. With 35 years of extensive installation experience we can ensure that your security system will meet your individual requirements. We have installed home burglar alarms and commercial alarm systems across Cardiff, Penarth, Barry, Wenvoe, Vale of Glamorgan and South Wales. We offer a no obligation free quotation on request.