Fender Rumble Club

[Cowboy0071]

Well, of course, adding two 8 ohm cabs is very easy by using either speakon or ¼" speaker cables to the two combination connectors on the back, leaving the Impedance Switch set to 8/4 ohms.

View attachment 4480555​

Then, to add the third cab, use the appropriate connecting speaker cable from the back of either of the first two cabs. The appropriate speaker cable being the one with connections to match whatever is left accessible on the back of the cab already connected directly to the amp head. Because they are parallel connections, this has the same electrical effect of plugging the third cab directly into a third connector on the back of the amp!

View attachment 4480557
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Then, for connecting the third cab, set the Impedance Switch as shown in this table in the Rumble 800 HD manual. The first two 8 ohm cabs make a total 4 ohm load. Adding the third cab makes a 2,67 ohm load (8 ohm + 4 ohm), so set the Impedance Switch to 2 ohms!

View attachment 4480561
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Adding a fourth cab is then the same, just connect it to the back of the other cab already directly connected to the amp head, and leave the Impedance Switch set to 2 ohms.

Is worse comes to worse, none of this applies to the Rumble 500 or 200 heads! They can each only run a total of two 8 ohm cabs, and no more, for a total of 4 ohms.

I hope this helps.
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So G-Dog, this got my brain going, I have a Stage 800, Just picked up a Rumble 210, and already owned a Carvin MBE115. If I run another speaker cable from the 210 to the MBE115 using the parallel inputs (both cabs are 8 Ohms) for a total of 4 Ohm impedance. Would I also need to change the switch on the back of the stage 800 to 4 Ohms? Also would I also be pushing 200w to both cabs with the Stage 800 still using 400w or would it be 800/3 for roughly 267ish each? Is that even possible with a stage 800?

 

[Nebraska]

​

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I see. That makes it pretty simple.

 

[G-Dog]

So G-Dog, this got my brain going, I have a Stage 800, Just picked up a Rumble 210, and already owned a Carvin MBE115. If I run another speaker cable from the 210 to the MBE115 using the parallel inputs (both cabs are 8 Ohms) for a total of 4 Ohm impedance. Would I also need to change the switch on the back of the stage 800 to 4 Ohms? ... ...

Yes, Cowpoke, the labeling on the Rumble Stage 800 can be confusing and is very easy to overthink. But, basically, the Impedance Switch goes up (or stays up) at the 8 ohm setting when a single 8 ohm cab (or no cab) is attached, and goes down to the 4 ohm setting when a 4 ohm load (= 2 x 8 ohms) is attached. It just seems a little too straightforward and simple, doesn't it?

... ... Also would I also be pushing 200w to both cabs with the Stage 800 still using 400w or would it be 800/3 for roughly 267ish each? Is that even possible with a stage 800?

Excellent questions, there, pod'nuh. I also had such questions when the Stage 800 was announced, but before the manual became available, and we exchanged many a confusing post here then, I can tell ya.

Simply put, the Impedance Switch labeling refers strictly to the external extension speaker(s) only! Either an 8 ohm load or a 4 ohm load. The 8 ohm load needs to be able to handle 400 watts and the 4 ohm load to handle 500* watts (or two 8 ohm cabs handling 250* watts each). And the manual addresses it very simply, too.
​

*But, in actuality, the 8 ohm internal speakers present a constant 8 ohm load to the amp that the Impedance Switch labeling totally ignores! Wat up wit dat?

Connecting just one single external 8 ohm cab to the Stage, then, presents a 4 ohm total load to the amp,

the inverse of (⅛ + ⅛) = the inverse of ¼ = 4 ohms​

and this automatically ups the amp's output from a possible 400 watts to a possible 800 watts (hence the name of the combo). (Like most modern amps, the 800 can automatically switch from 8 ohms to 4 ohms without a manual switch.) And that 800 watts power is also automatically split 50/50 between the internal and external speakers, up to 400 watts each. OK. Still fairly simple.

It gets complicated when the second 8 ohm external cab is attached. That is actually the third 8 ohm load the amp sees, which is then,

the inverse of (⅛ + ⅛ + ⅛) = 8/3 = 2.66666666666666666... ohms​

which is closer to 2 ohms than to 4 ohms, so some manual amp switching is needed. Then the Stage 800's Impedance Switch is used to actually switch the amp from 8/4 ohm automatic mode to 2 ohm mode, just like the 800 HD's switch does! And the label on the Stage 800's switch is a "white lie" meant to simplify things. (But, apparently, the Stage 800 is not fully 2 ohm stable like the 800 HD is.)

And, YES, the three 8 ohm loads divide the 800 possible watts evenly so that each one only sees up 267 watts. So, actually, the two cab 4 ohm external load could see 533 watts total, (rounded down to 500 on the Impedance Switch labeling).

So, you had it right, Cowboy. I hope this lengthy explanation helps others.
.​

 

[Cowboy0071]

Yes, Cowpoke, the labeling on the Rumble Stage 800 can be confusing and is very easy to overthink. But, basically, the Impedance Switch goes up (or stays up) at the 8 ohm setting when a single 8 ohm cab (or no cab) is attached, and goes down to the 4 ohm setting when a 4 ohm load (= 2 x 8 ohms) is attached. It just seems a little too straightforward and simple, doesn't it?

View attachment 4480884​

Excellent questions, there, pod'nuh. I also had such questions when the Stage 800 was announced, but before the manual became available, and we exchanged many a confusing post here then, I can tell ya.

Simply put, the Impedance Switch labeling refers strictly to the external extension speaker(s) only! Either an 8 ohm load or a 4 ohm load. The 8 ohm load needs to be able to handle 400 watts and the 4 ohm load to handle 500* watts (or two 8 ohm cabs handling 250* watts each). And the manual addresses it very simply, too.
​

View attachment 4480902​

*But, in actuality, the 8 ohm internal speakers present a constant 8 ohm load to the amp that the Impedance Switch labeling totally ignores! Wat up wit dat?

Connecting just one single external 8 ohm cab to the Stage, then, presents a 4 ohm total load to the amp,

the inverse of (⅛ + ⅛) = the inverse of ¼ = 4 ohms​

and this automatically ups the amp's output from a possible 400 watts to a possible 800 watts (hence the name of the combo). (Like most modern amps, the 800 can automatically switch from 8 ohms to 4 ohms without a manual switch.) And that 800 watts power is also automatically split 50/50 between the internal and external speakers, up to 400 watts each. OK. Still fairly simple.

It gets complicated when the second 8 ohm external cab is attached. That is actually the third 8 ohm load the amp sees, which is then,

the inverse of (⅛ + ⅛ + ⅛) = 8/3 = 2.66666666666666666... ohms​

which is closer to 2 ohms than to 4 ohms, so some manual amp switching is needed. Then the Stage 800's Impedance Switch is used to actually switch the amp from 8/4 ohm automatic mode to 2 ohm mode, just like the 800 HD's switch does! And the label on the Stage 800's switch is a "white lie" meant to simplify things. (But, apparently, the Stage 800 is not fully 2 ohm stable like the 800 HD is.)

And, YES, the three 8 ohm loads divide the 800 possible watts evenly so that each one only sees up 267 watts. So, actually, the two cab 4 ohm external load could see 533 watts total, (rounded down to 500 on the Impedance Switch labeling).

So, you had it right, Cowboy. I hope this lengthy explanation helps others.
.​

Thank you very much Sir, just one quick question. With the Stage 800 NOT being fully stable at 2 ohms could I damage my amp by playing around with it. I really don't see myself needing the extra 15, I was just tinkering.

 

[G-Dog]

Thank you very much Sir, just one quick question. With the Stage 800 NOT being fully stable at 2 ohms could I damage my amp by playing around with it. I really don't see myself needing the extra 15, I was just tinkering.

When I said, "apparently, the Stage 800 is not fully 2 ohm stable like the 800 HD is", that means not to add a third external 8 ohm cab, which would be a fourth 8 ohm load counting the internal speakers:

the inverse of (⅛ + ⅛ + ⅛ + ⅛) = inverse of 4/8 = 8/4 = 2 ohms​

Nothing I've seen in the Rumble Stage 800 manual, or anywhere else indicates that it can handle 2 ohms. 2.67 ohms is OK, but 2.0 ohms is probably not OK and might damage your amp.

So, as long as you only connect one or two 8 ohm external cabs, you shouldn't expect any problems from that. Enjoy!
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[Cowboy0071]

When I said, "apparently, the Stage 800 is not fully 2 ohm stable like the 800 HD is", that means not to add a third external 8 ohm cab, which would be a fourth 8 ohm load counting the internal speakers:

the inverse of (⅛ + ⅛ + ⅛ + ⅛) = inverse of 4/8 = 8/4 = 2 ohms​

Nothing I've seen in the Rumble Stage 800 manual, or anywhere else indicates that it can handle 2 ohms. 2.67 ohms is OK, but 2.0 ohms is probably not OK and might damage your amp.

So, as long as you only connect one or two 8 ohm external cabs, you shouldn't expect any problems from that. Enjoy!
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I greatly appreciate the response. I misunderstood your previous response in my old man brain. I've had electric basses for 25 years, but spent nearly 20 of those grabbing a '48 Kay upright that did not require much setup other than trying to figure out how to make the soundman's contraption for the microphone fit beneath the tailpiece somehow. My only amp for the last 12 years was a Carvin MB10 and the previously mentioned MBE115 ext cab. Then I saw a Stage 800 and got delusions of Grandeur. G-Dog you rock!

 

[Black Out Jazz]

4 10s and 1 15. I think it is going to be loud as funk. Hope you're outdoors when you dime that rig

 

[G-Dog]

I greatly appreciate the response. I misunderstood your previous response in my old man brain. ... ...

OMB! Yeah! I gots one of them ... uh, somewhere ... but I hardly ever use it, any more. It don't work as good as it used to did.

I know I sometimes ramble on a lot, and it takes me quite a while to type all o' them words, an' then go back an' re-type 'em. An' then go back back an' re-re-type 'em ... again, ... and again, ... 'til they says what they oughta say ... ... I think, .. unless I get inner-rupted in real life ... er, sumpin' ... ​

... ... I've had electric basses for 25 years, but spent nearly 20 of those grabbing a '48 Kay upright that did not require much setup other than trying to figure out how to make the soundman's contraption for the microphone fit beneath the tailpiece somehow. ... ...

Man, oh, man, Cowpoke! I shore do envy and respect the old school bass. My few brushes with it have been fascinating! Alas, I'm too chicken to pursue it. But, I really admire those who do, sir. ​

... ... My only amp for the last 12 years was a Carvin MB10 and the previously mentioned MBE115 ext cab. Then I saw a Stage 800 and got delusions of Grandeur. ...

'At ain't no delusion, pod'nuh! The Rumble Stage 800 puts out a lot grander sounds than 'most any other amps! Now, granted, a few of 'em is a bit "over the top," how they say. But most o' those tones is faithful reproductions of classic vintage amps costing thousands of bucks, if you could even find 'em. An' there you got a veritable cornucopia of a whole lots of 'em right at yer fingertips! 'At's purty durn grand, aw'ight.

Thank you for your questions and clarifications, Cow-man. It's great having you here. Oops! It just occurred to my old man brain that this discussion really shoulda been in the Rumble LT25, Studio 40 & Stage 800 club sub-thread, instead o' here. My apologies to our non-modeling Rumbling brothers and sisters. We'll do better next time.
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[LennyJ]

I have posted these pics before - but have added another with the amp I decided on to go on top.

I took my rumble 100 combo and upgraded the speaker to the eminence 2512 and added the jumper in the back to use another head (for a little more power). After some research I decided with the Mark Bass Lil Mark Vintage.

500 at 4 ohms and 300 at 8 ohms (according to the site). So not far off the 250 watt speaker.

My only other consideration was the Rumble 800 head, but that is 400 at 8.

Sorry it is not a Rumble head - but it really sounds nice with this updated Rumble box.

 

[GonePlaid]

I have posted these pics before - but have added another with the amp I decided on to go on top.

I took my rumble 100 combo and upgraded the speaker to the eminence 2512 and added the jumper in the back to use another head (for a little more power). After some research I decided with the Mark Bass Lil Mark Vintage.

500 at 8 ohms and 300 at 4 ohms (according to the site). So not far off the 250 watt speaker.

My only other consideration was the Rumble 800 head, but that is 400 at 8.

Sorry it is not a Rumble head - but it really sounds nice with this updated Rumble box.

View attachment 4481667 View attachment 4481668 View attachment 4481669 View attachment 4481670

If it works for you, thass what matters.

 

[LennyJ]

If it works for you, thass what matters.

Thanks GP, small - rumble 100 combo - Medium MB with Rumble cabinet - large MB with Musicman cabinet

 

[LennyJ]

Thanks G-Dog for keeping me straight.

 

[Cowboy0071]

4 10s and 1 15. I think it is going to be loud as funk. Hope you're outdoors when you dime that rig

When I first plugged in the 210 I had the master at 10 o'clock and both pickups on my mustang halfway. My fiancee asked me why I was playing it so low "You bought the D*mn thing, turn it up" so I pegged everything and played lightly, Then I hear "something fell in the kitchen" Still don't know what it is yet, can't find it and I need another speaker cable for the 15 to try that out. She's a keeper, but I'm kinda grounded from buying anything else until after Christmas. That is due to me unknowingly spoiling her big surprise gift which woulda been a new Rumble 210 cab if they were in stock anywhere. Her, my cousin, and brother (two guitar players ) were conspiring for said surprise lol. The nerve of me to purchase a used one that looks like new with a cover for $236.50 less than a new one woulda cost her.

 

[Warrywart]

Enjoying reading the thread. I picked up a 40c because I was tired of lugging the Ampeg BA115HP around (80lbs). The 40c meets 90% of my needs. When my Ampeg crapped out before a gig there just happened to be a Rumble 200c nearby on CL so I picked it up. Thinking about adding an extra cab

 

[G-Dog]

Enjoying reading the thread. I picked up a 40c because I was tired of lugging the Ampeg BA115HP around (80lbs). The 40c meets 90% of my needs. When my Ampeg crapped out before a gig there just happened to be a Rumble 200c nearby on CL so I picked it up. Thinking about adding an extra cab

Way to go, Warry! @Warrywart, you are now member #1412 in the Fender Rumble Club. Congratulations and welcome. Please put that number in your TalkBass Signature for safe keeping. Then make yourself at home here and on your Rumble Club Wiki page, the repository of all Rumbling wisdom and knowledge.

Please tell us a bit about yourself, such as your bass experience in general and your Rumble journey in particular. Whatever your situation, you're bound to fit right in here since we have all kinds. But we all love to ... ...

Rumble On!
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[Black Out Jazz]

When I first plugged in the 210 I had the master at 10 o'clock and both pickups on my mustang halfway. My fiancee asked me why I was playing it so low "You bought the D*mn thing, turn it up" so I pegged everything and played lightly, Then I hear "something fell in the kitchen" Still don't know what it is yet, can't find it and I need another speaker cable for the 15 to try that out. She's a keeper, but I'm kinda grounded from buying anything else until after Christmas. That is due to me unknowingly spoiling her big surprise gift which woulda been a new Rumble 210 cab if they were in stock anywhere. Her, my cousin, and brother (two guitar players ) were conspiring for said surprise lol. The nerve of me to purchase a used one that looks like new with a cover for $236.50 less than a new one woulda cost her.

LOL "something fell in the kitchen"

 

[ED3]

Does anyone here own a rumble 500 with a rumble 115 extension cabinet?

It shakes my house. I've been looking at a bass head for the extension cab, what have people used with good results?

 

[Black Out Jazz]

Does anyone here own a rumble 500 with a rumble 115 extension cabinet?

It shakes my house. I've been looking at a bass head for the extension cab, what have people used with good results?

Would this work?

Fender Rumble 800 800W Bass Amp Head Black LN | eBay

 

[Jughead6]

Nearly done... new grilles for my R210 and R115 cabinets. I have elected to use a water dreaming theme, because I think it is a beautiful pattern and this is small acknowledgement of the traditional custodians of Australia. I just need to add some logos (currently in transit, but with international shipping in its current state I might not get them until sometime in 2023) and velcro.

View attachment 4458835

OK, the 210 is now done. Just need to finish the 115...

 

[JakobT]

Would this work?

Fender Rumble 800 800W Bass Amp Head Black LN | eBay

The Rumble 800 puts out 400 watts at 8 Ohms, but the 115 cab is only rated for 300.