I have been looking but I can't find a non portable headphone amplifier with 3.5 mm jack sockets. I need it to plug into my TV, laptop or pc (which all use 3.5 mm sound jacks) and then on then plug into my headphones, amplifying the sound. I need it to be stationary/non portable because I don't want to have to use batteries, instead I would prefer for it to plug into a socket. Also I don['t mind too much about the size and for a budget I would say under £80 and I would rather have something that is dear but does the job very very well rather than something cheap that doesn't. Thanks in advance.