Sportex backbox

Hi all, just wanted to know if anyone has this backbox and is it very loud? don't want anything to loud. The  rest of my system is standard. My one just gave up and looking for a replacement. Saw this on ebay and only £40 more than a standard one.http://cgi.ebay.co.uk/ws/eBayISAPI.dll?ViewItem&item=270734117987&ssPageName=STRK:MEWAX:IT

nothing to lairy, just a sporty sound i'm looking for.

Cheers