So! I an pretty new to vinyl and audit systems as a whole. Till now, my life was simple and included all in one speakers and amps. Now, however, I have managed to get myself into a mess. So, I have a Audio Technica LP120 turntable that connects to a Yamaha RD220 receiver. I have two brand spanking new Wharfedale Diamond 220 bookshelf speakers connected to the amp. And here is the kicker. Earlier, I bought only the turntable and since it has an in built pre amp, I connected it straight to my Sony GTK X1BT powered speakers. The sound was fantastic. However, I noticed that when I was playing my turntable, I had to turn up the volume on the speaker to 50 or above!! If I tried doing that when my phone is connected to the speaker via bluetooth, a LOT of glass would be found on the floor in my house and possibly my neighbours. So I bought myself an Amp. Since the Amp is a basic receiver with no pre out, I had to buy the Wharfedale speakers. Now the issue is that the sound is still a little low as compared to my Sony speakers. Also, and this is where I am stuck, the base is decent and not in the "you can feel it in your tummy" range. I like the feeling in my tummy. So I concluded that I needed a sub woofer. And now here is the 10 dollar question. My receiver does not have a pre out or an amp out. - Can I connect any standalone subwoofer to the amp without blowing something up? - Do I need to have a subwoofer with high level input or is there some way I can save my money and still enjoy some base? I do not want to replace my receiver because - I love listening to the DAB radio when I am not playing my own music. - I will probably head for a divorce with her taking half of my shit if I even whisper that I need to buy some more things for my turntable. Any help will be highly appreciated. Oh and just so you know, I haven't a clue on anything technical when it comes to audio. So please, try and dumb it down AB.