Room resonance and louder note?

[SurferJoe46]

The Sondern or dynamic at that freq might just be happening at head-height and on the floor you are out of the beam ----------------- or whatever.

It's still there, but you aren't getting the whole frequency and/or just a part of it----------------- or whatever.

Maybe!?!

It's late and I need my medications now.

 

[Growly Lytes]

I find that if I reposition myself or the cabinet there are different frequences that are louder or softer.

I find this too.....
Where i stand gives me different sounds.I could swear that just by moving a few feet in a certain direction that i have adjusted the eq when i know i havent....Big changes in sound just by moving yourself !!

 

[Growly Lytes]

Do you use the same cabinet everytime ?
Maybe its the cabinet !

 

[Foz]

Bass traps work the same way as any absorbtion devices, they just have to be thicker. They're actually mis-named, as anything capable of absorbing the 14 foot and longer wavelengths of 80Hz and lower frequencies would have to be literally feet thick. They actually work in the midbass, roughly 100 to 200 Hz.

No

Porous absorbers work by allowing the sound waves to enter a space with radically different acoustic impedance versus the air in the balance of the room. Concepts like the speed of sound in air at standard temperature and pressure no longer apply. If you corner mount porous absorbers even a 4" thick bass trap will work better at 80 Hz than 200 Hz.

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Also, I doubt SBIR [speaker boundary interference response] is the key to solving this dilemma - which I gather you are trying to allude to as the primary acoustic problem.

----

bass traps... how would you make one? Thanks!

I aint convinced that's your problem - but several designs and assembly instructions are in the FAQ of the forum linked below.

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I suggest you take your bass & rig outside - if the problem disappears its your room - if not, its your bass or your rig.

 

[Foz]

Big changes in sound just by moving yourself !!

There are no problems in system play back / small room acoustics that can not be solved with a better speaker and a bigger room.



Off axis response! This under scrutinized aspect of typical bass cab design is one of the most charming features of greenboy's fEarful cabs IMO.

 

[Chrisk-K]

Do you use the same cabinet everytime ?
Maybe its the cabinet !

No. I use a GK cab and two combos (Fender and Line 6).

 

[Ric5]

When I play my basses at my home, the A note on the E string is much louder than other notes, especially when I use a neck pickup on my Js or a P pickup. I've tried different amps and cabs and the result is the same. Interestingly, the open A note doesn't show the same symptom.

Is this caused by "room resonance"? That is, does my house material somehow increase the amplitude of the A note? Is there a cure?

I have a similar problem when I play through my ampeg with one 2x10 cabinet. When I use 2 cabs it seems less pronounced.

 

[GGWAW]

I'm the OP. It's not the problem of the bass because I get this booming A with all my basses and all my amps.

I don't like hot pickups and the neck J pickups of my Geddy & Lakland and the P pickups of my P and Spector are almost flushed to the body.

I did some experiment. When I played basses in my wooden-floored living room, the A note boomed even more loudly. When I play basses in my carpeted basement, the booming is still there but a little bit weaker.

Here's an interesting thing. I laid down on the floor, facing the ceiling, and played basses. I did NOT hear the booming A at all! The A note sounded like other notes. Can anyone interpret what's going on here?

Hello
I know this is quite an old one but did you find the issue ?
I have the G on the E string that sounds twice as louder than the E of A on the same string
I will move the Amp away from the wall next time to check (it only happens when I play at Church using the fender rumble 100 I leave there)
Thanks !

 

[One Way]

My previous home, a larger 2 story on crawl space, was very resonant to D. I took my amp outside and all notes sounded equal in volume.
My new house is smaller, a single level with unfinished basement, and the same amp and basses do not experience the pronounced D volume heard in the previous house.