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Does adding a cab to a Rumble improve tone or just volume?

I like amps playing on their lowest recommended Ohms. I think they sound better because there is less strain on the amp and they seem to have better response on each pre-amp knob.

Running an amp into its minimum recommend load impedance increases the current, and as a result increases the strain on the amp's output devices. You have it backwards.
 
The dealer is about an hour away. Great guy. More than willing to let me borrow stuff to try out. The problem is that they don't have one right now and would have to order it....

ah I got ya.

I would definitely say to go with the extra cab. I used to have to GKMB-210. I ran it solo, like it.

Then I ran it daisy chained to another GKMB-115 combo, also liked it for the most part. More volume sure.

then I paired the 210 with a GK410……Holy.Crap. The fullness of the sound was amazing. The low end, the depth, the clarity….it was awesome. I’m on board with saying get the extension cabinet
 
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Running an amp into its minimum recommend load impedance increases the current, and as a result increases the strain on the amp's output devices. You have it backwards.
I think you missed my point, I stated at the amps "recommended" level and highlighted the improved amp response which is not an opinion, it is a fact. If an amp won't work efficiently at its recommended levels then why does every amp made include the information? OHms used to be defined as electrical resistance with the smaller number being the most efficient when I was a beginner, over a half century ago.
 
I think you missed my point, I stated at the amps "recommended" level and highlighted the improved amp response which is not an opinion, it is a fact. If an amp won't work efficiently at its recommended levels then why does every amp made include the information? OHms used to be defined as electrical resistance with the smaller number being the most efficient when I was a beginner, over a half century ago.

I was trying to educate you a bit, but I see you're not receptive. Have a nice day.
 
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For me usually both.......I typically run a 210.......I have a second one for larger gigs/venues. To my ears.....the quality of sound increases with a second cabinet......maybe a little louder as well.
 
I've seen numerous similar posts but they all pretty much end up confusing me with ohms and air movement...
I have the Rumble 500 which has plenty of volume so improvement in that area is not needed.
Here is the question: Should I expect an improvement in the overall tone of the Rumble if I get the matching 2/10 cabinet? The dealer where I would get the 2/10 thinks it would be only volume.
Thanks.
I added a second cab to my 500HD, 2 210s. I wanted to be able to use the full 500W. Why? Just wanted to try it I guess and the second cab was used, like new. Got it here on TB.
There is a difference to me. The sound is a bit more 'full' or a little 'richer' for lack of a more descriptive word. I now use an 800HD with the same 210s.
 
I used to use an Ashdown 2 x 10 combo with an Ashdown 2 x 10 extension cab beneath, on it’s own the combo was “ok” but with the added cab it was superb!

It wasn’t just the fact that the speakers were nearer my ears it was definitely a different and more fuller sound. A bit hard to explain but even the drummer commented on the difference.
Yes there was also more volume as you’re pushing more air but you tend to notch it back a bit as you can hear it better with the top speakers higher off the ground.

It did get to the point that I had to use both cabs even at very small venues as it had become to be “my sound” and different from the combo alone.
 
So I had the same question as you. I have the Rumble 500 combo and decided to use an old GK 410 as an extension and it totally changed the tone of the sound, for the better. It was definitely louder and the best way I can describe the tone change is it was fuller.
 
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I had a Rumble 500 head and 210 cab…later added another 210. While there was more volume, it didn’t change the overall tone. The Rumbles are great for the price, very reliable…but I couldn’t get the punch or clarity I wanted. I sold them and moved on the GK, than Mesa….tone chasing journeys often lead to Mesa:)
 
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I have been thru this with the Rumble 500 combo. Due to old age I needed something lighter than my Eden WT400/410xlt set up. Many people, including my BL, were talking about how great the Rumble stuff is. So I bought the 500 combo and couldn't be more disappointed:vomit:. So I added a Rumble 115 extension. Then a 210 Rumble extension....nada! In my practice room, at rehearsal and at one very low volume gig, the Rumble is great. But push it, even slightly, and all is lost. It turns to mush:spit:. This is my opinion anyway. I though I got a bad one or something.

So now I run my Eden WT400 thru the 210 and 115 as a mini stack and it's been good enough. :bored:
 
Ok, let me throw this into the mix...the Rumble in question is actually a replacement for a 5-month old Rumble that had bad speakers. Fender, according to my dealer, had no speakers to send as replacements so they are paying for the dealer to send back the whole amp...they will send a new one. Because of this, I'm a little concerned about sinking more money into this "project". However, after the initial investment in the Combo, I guess I need to try to do whatever I can to be happy with my sound. This is why I appreciate the help and advice given by all.