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Post subject: Re: Blues Jr with ext cab
Posted: Tue Mar 10, 2015 12:58 am
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Sounds good. Yeah, at some point we all should stop typing and spend some time playing. :lol:

BTW, I have another NGD today (on its way), so I'm going to be playing a bit more!

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Post subject: Re: Blues Jr with ext cab
Posted: Tue Mar 10, 2015 3:29 am
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shimmilou wrote:
......BTW, I have another NGD today (on its way), so I'm going to be playing a bit more!

Be sure to tell us and show us more upon arrival.

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Post subject: Re: Blues Jr with ext cab
Posted: Tue Mar 10, 2015 10:30 am
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shimmilou wrote:
:lol: How convoluted!

I'll stick by what I've stated numerous times; An impedance mismatch within a 2 to 1 ratio for a tube amp is absolutely and unequivocally, 100% fine. Further, too high an impedance connected to a tube amp can and does cause the OT to arc internally. A shorting output jack on a tube amp will protect the amp from harm if no speaker cable is connected to the amp. If a short circuit (zero ohms) protects the amp from harm, it is obvious that a 1 ohm, 2 ohm, or 4 ohm speaker load will also cause no harm for a 2 ohm, 4 ohm or 8 ohm amp.

With all due respect to Mr Soldono, he neither invented tube amps, nor did he come up with any laws of physics or electricity. He also can not alter the physics of how a tube amp operates, no matter how good his amps are. The fact is, impedance changes with changes in frequency. So at any given point in time, how "matched" is the impedance of amp and speaker during the constant changes in the frequency output of the amp? The amp is rated/tested using a purely resistive load anyway, and not using a speaker. With a speaker connected, the load impedance that the tubes see is constantly changing as the frequency changes. So, it can't possibly be matched at all times. :wink:

Interesting to note that the examples given, 4 ohm speakers with a 16 ohm amp, and 16 ohm speakers with a 4 ohm amp, are both outside the 2 to 1 ratio. :wink:

More people shorten the life of their tubes by not having the bias set properly, than by using a slight impedance mismatch.

"The proof is in the pudding." Not one thread here about an impedance mismatch within a 2 to 1 ratio causing any harm, or even shortening tube life, while myself and many others routinely use our amps with the slight impedance mismatch. That is really all that needs to be said. 8)



I think I'll stick with the guys that build, design and manufacture their own designs. Mike Soldano's stuff is first rate. I also think he knows a little bit about amps. I agree, a 2 to 1 mismatch is fine, but some players don't understand what that means and may push the limits beyond a 2 to 1 ratio. Damage can and will occur after that point. There are players who have done it especially when someone just brings a head or just borrows someone's cabinet. I've seen players cook their heads doing just that thinking they had too many speakers hooked up. Not all players are electronically savvy including myself. I just read the instruction manual. :wink:

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Post subject: Re: Blues Jr with ext cab
Posted: Sat Mar 14, 2015 7:40 am
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Well my new cab is here. It's a Hot Rod Deluxe cab and it is what I was hoping for. It just made the BJr sound bigger. And it also cleaned it up a bit. All I need now is some rubber feet for the BJr and its will be ready to gig with. I have a gig tonight and am very tempted to use it.


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Post subject: Re: Blues Jr with ext cab
Posted: Sat Mar 14, 2015 3:39 pm
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Sounds sweet! 8)

I use these for my HRDlx to sit on the same cab, they should also work for the BJr.

https://www.tubesandmore.com/products/P-H9107

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Post subject: Re: Blues Jr with ext cab
Posted: Sat Mar 14, 2015 3:55 pm
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When I bought the extension cab for my BDRI several years back, it came with a set of rubber feet included to put on the BDRI. Very much like the ones shimmilou referenced.

I now use that cab more frequently with my 5E3 Tweed Deluxe Head and haven't been playing the BDRI much.

<=== Picture

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