The JJ EL84s are as good as some of the early Mullard or Amperex types and perfect for guitar and hi-fi applications. These are currently the top-rated EL84 on the market. You will be surprised by how great these sound. Plus they are durable and last long. Work perfectly in Scott and Fisher integrated tube hi-fi amps as well as any EL84-based guitar amp. Get yours now and notice the difference.Gold plated control grid for improved fidelity and a plate dissipation of up to 12 watts. Very smooth with a sweet chime. Nice mids, sparkling highs and and tight punchy low end characterise this tube. Great replacements for VOX AC30's. The JJ EL84 seems to dominate the field in it's ability to withstand the abuse combo's dish out.