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This is pretty much how mine is. It doesn't matter how high I have any settings on Rhy2 or Lead but if I put the Rhy1 gain on 9-10 then it completely goes away. Seems the lower I have the gain on Rhy1 the more it tends to pop when switching to it. Wonder if mine could be a pre-amp tube or if...

Any more info on this? Mine does this occasionally.

They must have JUST updated it because I looked a few hours ago and it was still on the main products page. It's now on the"Out of Production" page: http://mesaboogie.com/Product_Info/Out_of%20_Production/Out.htm Kris

Same here man, and I just got it back from warranty. Too close! lol

I'm in Yarmouth, NS and just got my Mark IV a few months ago! Where in NS are you located JPM90th?

Mesa called me and let me know it was a bad LDR causing my issue. I'm not sure if you are familiar with these but they explained to me that LDRs handle the signal and how it gets switched. There are some posts that on here that explain it better. So they're sending it back now and hopefully...

They're already sending it back actually, was only there a week, thanks for the info guys, appreciate it. Kris

I've been seeing a few people on here saying that they had LDRs go bad on their amps lately. My brand new Mark IV had to be sent back to Mesa because of an LDR problem too. So I was just wondering, is this very common? do LDRs go bad all the time? I'm new to these amps and just want to learn...

You we're right, Mesa just called me and said this was exactly what was wrong with my amp. Thanks Kris

Hi Bastian, I had a similar problem with my brand new MKIV except it was the Rhy 1 Channel. I'd have the Lead channel on 2 or 3 and the Rhy 1 on 10 with presence and gain on 10 and it was about even with the Lead channel. If I tried any of the factory settings it was rediculous. Going from...

Hey guys, So I had my amp sent back to Mesa to get it checked out and here’s what they said: This amp was tested at Mesa Boogie and found to have No Faults—it’s working very well—it will be shipped back to the store. As a customer service they changed the output tubes—in case there was a tube...

Not sure about add-ons but the head goes for $2000

I'm actually getting mine back next week but I don't know what to think since Mesa said they tested it and found "no faults" but replaced the tubes anyway. I can't see them letting it go through QC twice with it having a problem but I'll see soon. Mine had a RHY 1 channel that was extremely...

Hey guys, I just have a general question. Can power tubes affect only 1 channel if there is an issue? Thanks Kris

I'm also waiting for my replacement Mark IV, it's been about a month or so.

Mine took 3 weeks. I think I read somewhere that they do bulk runs of certain models, maybe they were on the Mark IV when I ordered it. It had to be sent back though and it's been a week so far, we'll see how long it takes this time. Kris

yeah lol I literally had the gain/presence/master on 10 and it was about even with Lead on 1-1.5 (gain on 8). I just called my dealer and they said they tried it and sent it back to Mesa, so I'm happy with that so far. I'd rather Mesa look at it then get it repaired at a dealer since it was...

I'm interested to see how this works out for you because I know how it feels to get a brand new Mark IV and not have it working right. The problem with mine is that the RHY 1 channel barely has any output. I think everything else works and I was really please by the tones. But I only got to try...

I brought my amp back to the dealer and they thought the output on the Rhy 1 channel seemed low also so it's with their tech department now. Can someone do me a favor and let me know if using the factory sample settings from the manual gives each channel about the same amount of volume. This...

Hi Edward, It's actually a brand new amp and this was the first time I ever turned it on so the Rhy1 Channel has never worked right. I'll be bringing it back to my dealer this weekend, I am no amp tech lol. Thanks a lot for the info though I'll keep it in mind! Kris