I recently acquired an amazing early 60s Ampeg J-12 Jet 15 watt amp. It works great and sounds amazing. My issue is that even at just 15 watts it gets LOUD. And it doesn't start to break up until it gets well past appropriate levels for my tiny, thin-walled house in this packed neighborhood. So I was thinking about getting an attenuator so I can still utilize its natural crunch at home. But I have never gotten one. Do I need to buy one that matches my amp's wattage and ohms? Is there a price threshold where they tend to not sound great under a certain amount? I don't want to get one it it's going to take away from how great this amp sounds, and also not if I need to break the bank. Thanks!