engie

Based on what you posted and the system in your tagline, I'm guessing that the RB-5s are for stereo only. I will reiterate what others have said....how much do you want to spend? Also, how big is the room? What kind of music do you like and what is your typical listening level? This will give us an idea of how much power you need. According to the measurements in this review (http://www.audio-ideas.com/reviews/loudspeakers/klipsch-rb5.html), the original RB-5 was very efficient and a pretty easy load for the amp. Probably safe to assume yours measure very similarly. If I were you, I would definitely look for a small number of high quality watts to hook them up to. The previous recommendations of vintage integrated tube amps is definitely a good fit, if they are refurbished. Since you are new to tubes, I would call one of the guys who fixes them and ask what sounds good AND is easy to maintain. Part of the easy to maintain part is that it should use tubes that are currently in production. There are lots of amps out there that use tubes you can't reliably find any more. That will make life a lot more difficult/expensive for you. I would be less enthusiastic about buying a monster receiver from the 70s & 80s. Reliability will be a problem at this age and they are far more complicated than the tube integrateds already mentioned. Similarly to the out-of-production tubes above, there are LOTS of transistors that are out-of-prodcution. My experience with such receivers tells me that sonically you are better off with tubed Scott, Eico or Fisher. Do some homework on Scott, Eico and Fisher and ask back here about any particular model you are interested in. Jeff