Hi Leonardo, if I may suggest try to find an older Marantz or Pioneer receiver from the 70's. Something along the line of a Marantz 2230 or 2275 as well as a Pioneer SX950 or SX1050. Then use the speaker tabs to power the K1000, I have done so with great results for very little money. This units can still be found (if you look long and hard) for under $100 USD, although lately they are going for a lot in eBay. Thankfully there are plenty of thrift stores and garage sales!