Wonder if anyone could explain this: A friend loaned me a pair of 300B from EML. They work fine in his Woo audio. They are the normal one. Anyway, both times I rolled them in my Cayin, they blue the fuse... Tubes are perfectly fine back in other 300B amps. Very strange. Any ideas why this would be?
Thanks. Man oh man, it is strange because the stock tubes work just fine, so the amp is working just not with those tubes. Makes me scared to get other ones. And I have to say Cayin isn't much help either... Unbelievably, EML was far more helpful and it wasn't even their product. They were kind and even looked at the amp manual and offered suggestions to try. This is one of many times I have regretted buying Cayin....
What brand is the V281?
I "upgraded" to the Cayin because it sounds great with Focal and I hv Utopias amongst other cans. And that great synergy remains, but I have been disappointed with Cayin. The list is long: Their "official" dealers here dont have shops; they are just kids with online websites; their customer service is cold and off-putting/dismissive and they aren't keen to help you in any way. You may get the "ask your dealer" routine, and then the dealer says "ask Cayin..." I have encountered way more issues than any amp of this price should have, including defective stock tubes (never replaced!), EML tubes that dont work, etc... With hindsight, I wouldn't have bought this amp. I have expensive amps for my speaker rig and they had an issue and the manufacturer was all over it--super kind and helpful, replaced the issue and even gave me a gift to say sorry, which is above and beyond... What you are paying for with more expensive products should be kind and courteous, helpful customer service and careful QC to avoid problems as well. Just my two cents.
Sorry for your unpleasant experience with Cayin product. The HA-300 is a relative stable product by now, so I didn't check out this thread as often. I used to check thsi thread regularly two years ago, and participate in discussion promptly.
You can use both EML 300B and EML XLR 300B with HA-300. the EML XLR 300B can offer higher output in some 300B based amplifier, but you can't take advantage of that with HA-300. In other word, you can enjoy the sound signature of EML XLR 300B with HA-300, but not the benefit of extra output watts.
May I introduce the "Search this thread" feature for your reference. If you type EML in this box and hit search, you'll find all the posts that mentioned EML in this thread, listed in chronological order. You should notice from previous discussion that EML 300B should work fine with HA-300. For example, llamaluv has shared his EML 300B experience briefly, and you can read his detail sharing HERE.
I cannot figure out the reason why your HA-300 will blow its fuse when you install the EML 300B, it shouldn't. Sending your amp to your dealer for inspection will cost a lot, maybe you can send your EML 300B to your dealer and ask them to test them with their demo HA-300. If it works with their unit, then the problem is with your HA-300 units. If the tube don't work with your dealer's demo unit, then likely the problem is with your EML 300B.