low end of a cab to much.
low end of a cab to much.
i have a guitar cab and it has to much low end in it. anyone have any sugestions on some things i can do to get rid of some of it. i have thought of placing some sort of padded liner inside of it but i am not sure if it will do what i want. mabie i can do something to give the speakers less air space inside. again i am not sure if this will do what i want.
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lonewolf
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First, make sure your problem isn't a lack of highs rather than too much bass. Flatten your EQ at 0db and go from there. If you aren't getting crisp, loud highs, the problem may be the speakers. Otherwise....
If the cab has ports, you could try blocking the ports from the inside with acoustic or rigid foam, like you might find in road cases. That would reduce low frequency output and still allow smooth speaker excursion. In addition, you could put unfaced insulation on the inside back & sides of the cab, especially in the areas that normally would reflect the sound from the back of the speaker toward the ports.
If its a sealed cab, you can try unfaced insulation on all the inside surfaces, but it probably won't make a big difference--but maybe just enough.
I have never run across an open-back cabinet that has too much bass. If that is the case, you probably need new speakers.
If the cab has ports, you could try blocking the ports from the inside with acoustic or rigid foam, like you might find in road cases. That would reduce low frequency output and still allow smooth speaker excursion. In addition, you could put unfaced insulation on the inside back & sides of the cab, especially in the areas that normally would reflect the sound from the back of the speaker toward the ports.
If its a sealed cab, you can try unfaced insulation on all the inside surfaces, but it probably won't make a big difference--but maybe just enough.
I have never run across an open-back cabinet that has too much bass. If that is the case, you probably need new speakers.
...Oh, the freedom of the day that yielded to no rule or time...
the cab is an old fender bandmaster 2x12. the speakers are no more than 3 months old. i got the cab and put replacement speakers in it. the sound is almost like a low end feedback coming from the cab. i have tried other cabs and this problem does not occur. i have my lows eq'd to almost nothing if not all the way down. the sound to the best that i can describe is like what happens when a kick drum gives feedback. the only way i can keep it from happening is to play at low volumes. very low. there is no padding inside the cab. it is closed back and somthing tells me there is supposed to be.
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lonewolf
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You shouldn't have that trouble with a Bandmaster. Yes, they came stock with a little insulation in them, but it shouldn't make that much difference.
As I recall, the back comes off of these beasts after about 36 screws. If you want to eliminate the cabinet as the problem, take the rear panel off and try it open-back. If the howling persists, its either the speakers, the wiring or the impedance.
The low feedback you describe sounds like a speaker malfunction or possibly the amp working with too low an impedance.
Many questions:
What make/model/impedance of speaker did you put in it? Did you bolt the speakers firmly to the baffle? Are all the wires connected properly with no shorts?
Did you wire it series or parallel? If parallel, can your amp handle the resulting impedance? Some Marshalls and others don't like 4 ohms--2 ohms can make them howl before ... poof!
Out of curiosity, were the old speakers Utah speakers?
As I recall, the back comes off of these beasts after about 36 screws. If you want to eliminate the cabinet as the problem, take the rear panel off and try it open-back. If the howling persists, its either the speakers, the wiring or the impedance.
The low feedback you describe sounds like a speaker malfunction or possibly the amp working with too low an impedance.
Many questions:
What make/model/impedance of speaker did you put in it? Did you bolt the speakers firmly to the baffle? Are all the wires connected properly with no shorts?
Did you wire it series or parallel? If parallel, can your amp handle the resulting impedance? Some Marshalls and others don't like 4 ohms--2 ohms can make them howl before ... poof!
Out of curiosity, were the old speakers Utah speakers?
...Oh, the freedom of the day that yielded to no rule or time...
the speakers are the fender replacement but in a 16 ohm. they are wired parallel. and yes the origonals are utah. one is good but the other cracks a bit. one of these days i will se about getting it fixed or not. i am going to try it open back and then put some sort of padding in it to see what happens.
nighthawk,
Is it possible that the speakers are out of phase? That will cause wierd things to happen, like abnormally low volume, a "phasy" type sound, and uncontrollable feedback.
Try disconnecting one speaker and see if that fixes it.
I have seen speakers which had their terminals marked incorrectly, so just looking at the wiring may not tell you that they are truly in phase.
Is it possible that the speakers are out of phase? That will cause wierd things to happen, like abnormally low volume, a "phasy" type sound, and uncontrollable feedback.
Try disconnecting one speaker and see if that fixes it.
I have seen speakers which had their terminals marked incorrectly, so just looking at the wiring may not tell you that they are truly in phase.
... and then the wheel fell off.
yea i tripple checked all that. the only way i could get close to the right sound was to remove the back from the cab and have a friend hold it there with about a two inch gap down the one side. problem is that it still was not right. i also pluged it into a marshal 1960 cab and it sounded perfect so i dont know what to do now. i guess i should have said this sooner but i am running the line 6 hd147 head.