Fender Rumble Club

[ValerieK]

Yes, I don't know exactly how to figure it out myself but I do know how to figure out how to figure it out myself - the lectures are not needed, there is reference and instructional material available. I was asking to potentially save time - thinking that maybe in the 10+ years this amp has been around that maybe there was another "AstroSonic" out there...

That's all. Sorry?

 

[dORSY]

Yes, I don't know exactly how to figure it out myself but I do know how to figure out how to figure it out myself - the lectures are not needed, there is reference and instructional material available. I was asking to potentially save time - thinking that maybe in the 10+ years this amp has been around that maybe there was another "AstroSonic" out there...

That's all. Sorry?

What would that number tell You exactly? What is the goal here?

 

[ValerieK]

What would that number tell You exactly? What is the goal here?

Why do you need that information? What is your goal here?

 

[dORSY]

Why do you need that information? What is your goal here?

To give You _relevant_ information. For a goal.
If there's no goal, what's the trolling for?

anyways... let's do a one minute tape measuring:

the r100 is ~28x39x44 = 48048cm3 inside
the amp block takes up ~10x20x39 = 7800cm3
the ports are: 60mm long, 75mm in diameter.

Let's say we end up with ~40000cm3 of volume after all the stuff in there, including the speaker itself...

we end up with ~76Hz and ~54Hz of tuning freqs with 2 and 1 ports respectively.

(guess it will be close the the r40, as the cab designers are not fools at Fender )

Hope this helps!
ps: my tape measuring could've been incorrect, so please do Your homework

 

[John D Harris]

It's my understanding that the box tuning itself is not dependent on the driver. ...

Sorry for all of the conflicting information (seems to be the nature of online communication).

A speaker cabinet is a system, thus different drivers MAY have different effects on the resonance of the system.

So, yes the Fb (tuned resonance) of the cabinet is independent of the driver, but the driver will have its own free air resonance Fs which when combined with the Fb will result in Fc (system resonance), though Fb still has an impact on how Fc behaves.

Here is a link to an explanation of how these characteristics work together.

 

[toughluck]

I'd hazard a guess that they are identical across the entire Rumble range. And it makes sense, since then at least the bottom frequency response is roughly similar across the range (SPL and extension notwithstanding).

With both ports, the frequency is just below E2 and with one port plugged, the frequency is just below B1, so it fits nicely with the 2nd harmonic of the bottom string of a 4-string or a 5-string.

And it would make sense to plug one port if you're playing a 5-string to prevent an uneven boomy sound around D and D sharp played on the B string.

But while all that makes a lot of sense, there's nothing in the manual about the ports and I wonder whether this is one of those esoteric bits of knowledge that you "just know" after a few years playing, or is this proscribed?

I tried both ports plugged with a 100 W amplifier with some bass boost, and I have to admit that it not only sounds deeper, but it's also tighter and it doesn't overwhelm even a small room. Granted, the cab wasn't right against a wall, it was in the middle of the room, so there was no boundary effect and I wasn't moving around, so I didn't listen for room modes, but so far my experience is positive. In a larger space, it would probably sound even better, though without so much LF boost.

 

[John D Harris]

Gentlemen, and lady, please! Can we all please just take a breath for a moment? ... Then let's please endeavor to be more civil.

I regret that I don't have any technical expertise in this area to contribute, but ... ... ...

I believe that, based on Astrosonic's quote that "once you have your amp, you can back calculate the tuning knowing the box volume and port dimensions (inside diameter and length)", Ms. Valerie is simply asking if anyone has already done that for the Rumble 100, yes or no?

If the answer is "yes," then I assume she'd like to get the data in similar form to Astrosonic's "1.12 cf, 74 Hz w. 2 ports, 55 Hz w. 1 port" he gave for the Rumble 40.

If the answer is "no," it doesn't seem she was looking for any further information, such as how to do it herself, or other considerations in cabinet design, ... ... yet.

Can we please just restart this discussion, in a more civil manner now, with only this point, please?

Civility costs nothing, but can enrich all involved.

Hostile interactions online just alienate both sides, such that communication breaks down altogether.

Online communication can be a virtual minefield, but why not assume the best of every person we interact with, even if the other person is (apparently) behaving in a disrespectful way!

Most people (maybe fewer everyday) treat one another more respectfully in face to face communications.

"All we are saying, is give peace a chance." - JWL

REMINDER from the ...

***TalkBass Forum Rules***

Rule #1: Respect your fellow members. All registered users must address fellow members with the utmost respect at all times. If you do not agree with a fellow member, be courteous in your response. Thomas Jefferson said it best: "When I hear another express an opinion which is not mine, I say to myself, he has a right to his opinion, as I to mine".

Because of the limitations of text-based communication, the expression of intent can be tricky. One of the most common triggers of rule violations is the misinterpretation of intent behind a post. Use smilies often, and remember, it never hurts to begin a response with "In my opinion"...

If you do not address everyone on the board with respect, be prepared to lose your membership.

Please remember that threads are not your personal property and others are welcome to post relevant comments in them, including clubs and ads. We do not allow exclusionary posts here, so please do not state that certain other members (for any particular reason) cannot post in your thread.

 

[Keitor]

Argentinian 80’s rock today!

With my beloved 200c

 

[tom-g]

He said exactly that?

And so did you:



I'm still just trying to understand the basics here. Does anything besides cabinet volume (which is partly defined by the exact physical shape of the driver) and port geometry affect the tuning or not?

No, we did not. You are taking those quotes out of context:

…
The ports tune that cab, specifically for that speaker. Nothing more, nothing less. Every change made to the stock ports require a change elsewhere and it's all by guessing.

If you want to get an idea of what to try...Start with something like WinISD (or any cab tuning software) and get the T/S parameters for the speaker you want to try. The cab size and ports of the Rumble may not be anywhere near what you need. But you need to know what the speaker parameters are first., and build from there. Plug the numbers in and you'll know right away without even touching the cab itself.

Personally, after years of designing and building bass cabs, I'd rather reinvent the wheel than to jump into that rabbit hole again.

And my clarification to my first answer:

… You already have the answer on how to determine the tuning frequency of the cab. I had the impression you were asking about simulation of the existing speaker for which you need the T/S parameters. …

 

[ValerieK]

I'd hazard a guess that they are identical across the entire Rumble range. And it makes sense, since then at least the bottom frequency response is roughly similar across the range (SPL and extension notwithstanding).

With both ports, the frequency is just below E2 and with one port plugged, the frequency is just below B1, so it fits nicely with the 2nd harmonic of the bottom string of a 4-string or a 5-string.

And it would make sense to plug one port if you're playing a 5-string to prevent an uneven boomy sound around D and D sharp played on the B string.

But while all that makes a lot of sense, there's nothing in the manual about the ports and I wonder whether this is one of those esoteric bits of knowledge that you "just know" after a few years playing, or is this proscribed?

I tried both ports plugged with a 100 W amplifier with some bass boost, and I have to admit that it not only sounds deeper, but it's also tighter and it doesn't overwhelm even a small room. Granted, the cab wasn't right against a wall, it was in the middle of the room, so there was no boundary effect and I wasn't moving around, so I didn't listen for room modes, but so far my experience is positive. In a larger space, it would probably sound even better, though without so much LF boost.

I was guessing/hoping that it would be so simple as being able to block one port and improve B string response. Seems I should have just tried it myself and not bothered thinking about the numbers... Initial quick test seems like a pretty solid improvement to me:

I'll have to try swapping the speakers back and forth again now to see whether I actually prefer the Celestion. It definitely sounds great with guitar, but the stock speaker is pretty good for guitar too. I really like the Rumble with guitar, it's part of what I was hoping to achieve: a single amp that I can use for guitar and bass.

 

[dORSY]

I was guessing/hoping that it would be so simple as being able to block one port and improve B string response. Seems I should have just tried it myself and not bothered thinking about the numbers... Initial quick test seems like a pretty solid improvement to me:

My r100 (stock speaker, has lining added) does well with my active Yamaha trbx305 tuned ADGCF. Ports open, half plugged, fully plugged.
Sure, there is less "definition" below low B as expected, hard to tell note pitches that low. (because even the 1st harmonic is so low)

As far as I remember I've put D'Addario EXL170-5s on it last time. Strings matter (and cost -.-') a LOT!

Also, see my speaker swap/comparison posts from earlier, TL;DR: Lows are affected way less than mids. At least for those 2 speakers.

 

[G-Dog]

... ... ... I really like the Rumble with guitar, it's part of what I was hoping to achieve: a single amp that I can use for guitar and bass. ... ... ...

I've played 6-string guitar through my bass amps for several decades. It gives such a warm, rich tone when playing alone. I even enjoy using some guitar effects through a bass amp. And, when I got my Fender B-DEC first generation modeling bass amp many years ago, it was a revelation/revolution for both my basses and guitars! And it continues today with my Rumble Studio 40 third generation modeling bass amp!!

But, ... please excuse my digression from the main discussion ... ...

 

[Miles_ONeal]

Gentlemen, and lady, please! Can we all please just take a breath for a moment? ... Then let's please endeavor to be more civil.

I regret that I don't have any technical expertise in this area to contribute, but ... ... ...

I believe that, based on Astrosonic's quote that "once you have your amp, you can back calculate the tuning knowing the box volume and port dimensions (inside diameter and length)", Ms. Valerie is simply asking if anyone has already done that for the Rumble 100, yes or no?

If the answer is "yes," then I assume she'd like to get the data in similar form to Astrosonic's "1.12 cf, 74 Hz w. 2 ports, 55 Hz w. 1 port" he gave for the Rumble 40.

If the answer is "no," it doesn't seem she was looking for any further information, such as how to do it herself, or other considerations in cabinet design, ... ... yet.

Can we please just restart this discussion, in a more civil manner now, with only this point, please?

I was about to say something similar. Thank you.

 

[Miles_ONeal]

I've played 6-string guitar through my bass amps for several decades. It gives such a warm, rich tone when playing alone. I even enjoy using some guitar effects through a bass amp. And, when I got my Fender B-DEC first generation modeling bass amp many years ago, it was a revelation/revolution for both my basses and guitars! And it continues today with my Rumble Studio 40 third generation modeling bass amp!!

But, ... please excuse my digression from the main discussion ... ...

just as the early Fender Bassman amps are great for guitar!

 

[Miles_ONeal]

I was guessing/hoping that it would be so simple as being able to block one port and improve B string response. Seems I should have just tried it myself and not bothered thinking about the numbers... Initial quick test seems like a pretty solid improvement to me:

View attachment 7358363

I'll have to try swapping the speakers back and forth again now to see whether I actually prefer the Celestion. It definitely sounds great with guitar, but the stock speaker is pretty good for guitar too. I really like the Rumble with guitar, it's part of what I was hoping to achieve: a single amp that I can use for guitar and bass.

I found that stuffing one port made mine sound better for BEAD as well as DGCF.

 

[joeLowB]

Folks...I need a simple way to make simple recordings...not for any publishing but just for my personal use.

If I buy an XLR to USB C cable, and run it from the XLR jack on the back of my Rumble 100 v3 combo amp into the USB C jack on my Samsung phone or the USB C jack on my laptop, will I get a clean recording ?

Thanks for any input!

 

[Brandon Shea]

Folks...I need a simple way to make simple recordings...not for any publishing but just for my personal use.

If I buy an XLR to USB C cable, and run it from the XLR jack on the back of my Rumble 100 v3 combo amp into the USB C jack on my Samsung phone or the USB C jack on my laptop, will I get a clean recording ?

Thanks for any input!

You'll need an audio interface of some kind. I have a simple Focusrite with two inputs, but you really only need one. Fender Studio would be a great starting point on a Samsung phone.

 

[TheArchitect]

Folks...I need a simple way to make simple recordings...not for any publishing but just for my personal use.

If I buy an XLR to USB C cable, and run it from the XLR jack on the back of my Rumble 100 v3 combo amp into the USB C jack on my Samsung phone or the USB C jack on my laptop, will I get a clean recording ?

Thanks for any input!

There is no such thing. You need a digital conversion in the process. You will need something like this.

https://www.sweetwater.com/store/detail/UMC22--behringer-u-phoria-umc22-usb-audio-interface

 

[joeLowB]

There is no such thing. You need a digital conversion in the process. You will need something like this.

https://www.sweetwater.com/store/detail/UMC22--behringer-u-phoria-umc22-usb-audio-interface

Ok! Thank you! This helps!

 

[joeLowB]

You'll need an audio interface of some kind. I have a simple Focusrite with two inputs, but you really only need one. Fender Studio would be a great starting point on a Samsung phone.

Thanks so much! Very helpful!