As far as manufacturers of component speakers go, Alpine are one of the leading brands. I bought a set of these for a new audio set-up in an old car and were left questioning the thought put into these dreadful speakers! Alpine are still a top brand in my eyes, but i were severely underwhelmed by the performance of these components. I think I paid around £40 for them, and so they were never going to be top quality, I have since settled well with a set of Rainbow components since and will never go back!
The tweeters are pretty standard looking as far as tweeters go, and they do their job adequately. I were never impressed with the capabilities at the lower end. I found that bass killed them and it didn't take long to bore of the fact they just couldn't handle the power. Component sets have since come on a hell of a lot since these, and I wouldn't recommend these to anybody nowadays. Just a few short years in the audio world is a long time in terms of new technology. I will say, though, that the build quality is top drawer, and the mids themselves are favourably attractive compared to the fayre on offer today. The style and design hasn't moved on a great deal, although the tweeters have become more discreet in their appearance.
I love the design of the mids, though, a deep dark blue colour. I think that at 50 watt they are acceptable for the money in terms of performance. Fortunately we can now pick up much superior components to these for similar money, and the Alpine SPR 135A's are yesterdays news.