The more I review headphones, the more I realise that I've come to rely on more than one pair.Mood, you see, is as important to me as anything when I'm listening to music. Sometimes I want the audiophile experience.To hear what was recorded, and nothing more, with no hint of colour from the headphones. Sometimes, though, I want to have my noggin rocked by insane bass. The RHA T10i's claim to offer both, thanks to the use of tuning filters.As well as having tuning filters, the T10i's, which cost £149.95 (US$199.95, about AU$283), are made from injection moulded metal, with over-ear hooks, a set up that RHA claim offers effective noise isolation. They also come with interchangeable ear buds. It's fairly easy to make a pair of headphones that are good at one thing or another. It's obviously impossible to make a pair that can offer audiophile performance, while also giving amazing bass. But there is a narrow line where headphones can have just enough bass to serve as funtime cans, and still have the definition and clarity I sometimes lust after.