I've been listing what we call a "combo" amp. It's a power amp, mixer, speaker in one. They're for typically rehearsal, but, they are made tough, this thing will last you 20+ years. You can plug your computer directly into it, you will need an adapter in most cases, you're going to want to plug it into the input as opposed to aux input or cd input or effects loop return. What they call those differs with brand and model. Input is always the same though. As far as the highs... That's a different story, I don't know about those, I have some in mine (which is an off brand 35w kickback with a pioneer car audio speaker in it (the original speaker was blown, went to walmart bought the pioneer 12 for like 40$, put it in, sounded great, left it, it's been running now for like 10 years)) This is technically just for bass, but because of different styles they can handle highs too. I suggest try it, go to a local musix store with a laptop and an adapter so you can output from your headphones to a gorilla plug (it's a 1/8th to a 1/4 adapter you'll need, they're pretty inexpensive, from there it's headphone out, Tell the guy to humor you (cause not many people think to use a bass amp for bass, even though to me it makes sense) You'll see what I'm talking about as far as bass response, highs, and volume. From there make an educated decision on what you need or if you want to go with something more conventional. I'm in my bedroom with a 35W amp, and it's plenty loud and more than enough bass to go with my tv, if you want it to shake the neighbors windows, you can do that too. I did with a 450W Head and 4X10in cabinet. Actually rattled windows for two houses down. You can do that for less than 700$ in most cases, that will be way more than you need though. Just remember, bass is ten times the watts of treble, so if your 15w desktop speakers are loud enough, 150w bass is more than enough. It's all about moving the air.