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Fisher xp9c no low bass problem

A

Andresse

New Member
Hello everyone
I just tested my new xp9c after woofers refoaming, i didn't recapped yet.
The highs sound ok but I'm sure they will sound much better after recapping.
The problem is that the lows are not really low. l have experienced a lot of speakers and i can say surly that it doesn't goes lower than 60hz
Is somebody have an idea what is the problem?
Is it possible that after recapping the crossover i will have extra bass?
Tha you
 

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  • Fisher XP 9C xover schematic.jpg
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Welcome to AudioKarma.
I don't know anything about fisher speakers, but in the future,
you might want to take a look around at the site in general before you just
drop a post in whatever place you happen to be standing.
I moved your post from New Software to "Speakers" - its more appropriate.




Andresse said:
Hello everyone
I just tested my new xp9c after woofers refoaming, i didn't recapped yet.
The highs sound ok but I'm sure they will sound much better after recapping.
The problem is that the lows are not really low. l have experienced a lot of speakers and i can say surly that it doesn't goes lower than 60hz
Is somebody have an idea what is the problem?
Is it possible that after recapping the crossover i will have extra bass?
Tha you
Click to expand...
 
When you installed them after refoaming, are you sure that both woofers were connected the same way? If one had the wires backwards, the woofers would be cancelling each other's output, so you'd hear little low bass. Place the speakers face to face and put the amp or preamp into mono - if they are out of phase, there will be little output in the woofer's range. The solution is to reverse the leads of one of them - but if you random choose one rather than the other, the other drivers will be out of phase, so check wire color and input terminals.
 
Google search had a lot of hits for these speakers...

xp_9c_1791054.jpg
 
Nat said:
When you installed them after refoaming, are you sure that both woofers were connected the same way? If one had the wires backwards, the woofers would be cancelling each other's output, so you'd hear little low bass. Place the speakers face to face and put the amp or preamp into mono - if they are out of phase, there will be little output in the woofer's range. The solution is to reverse the leads of one of them - but if you random choose one rather than the other, the other drivers will be out of phase, so check wire color and input terminals.
Click to expand...
+1
 
Nat said:
When you installed them after refoaming, are you sure that both woofers were connected the same way? If one had the wires backwards, the woofers would be cancelling each other's output, so you'd hear little low bass. Place the speakers face to face and put the amp or preamp into mono - if they are out of phase, there will be little output in the woofer's range. The solution is to reverse the leads of one of them - but if you random choose one rather than the other, the other drivers will be out of phase, so check wire color and input terminals.
Click to expand...

THAT ^ happens quite often, leading to lack of bass.
 
28-22000 hz
500/1200/5000 Hz
Generally they have dried up tweeter problems, not base problems.
Your surround is mounted in not out so it doesn't hit the grill. Right?
 
quiet said:
28-22000 hz
500/1200/5000 Hz
Generally they have dried up tweeter problems, not base problems.
Your surround is mounted in not out so it doesn't hit the grill. Right?
Click to expand...

You are saying he should have inverted surrounds?
He said they have been refoamed, perhaps the new foams were installed improperly...which could lead to a different output than they were designed for.
 
But surrounds on backwards contacting the grill would have little to no effect at low levels, and simply taking the grills off would solve the problem if that were the case. So I suspect it is not the real issue even if it might be contributing.
 
I wonder what difference in compliance there might be between the original surround and the replacement.

The ad-copy posted By BigElCat states ultra compliant woofer with an Fs of 10hz, probably not gonna be an application for a generic 15 inch foam surround replacement.

The original factory surround looks unusually thin.

2427110-bccba5fe-fisher-xp-9c.jpg
 
bowtie427ss said:
I wonder what difference in compliance there might be between the original surround and the replacement.

The ad-copy posted By BigElCat states ultra compliant woofer with an Fs of 10hz, probably not gonna be an application for a generic 15 inch foam surround replacement.

The original factory surround looks unusually thin.

2427110-bccba5fe-fisher-xp-9c.jpg
Click to expand...

Think you may be on to something , with the compliance of the foam surround .

Re-foamed a set of XP 65's (10" woofers) with some generic surrounds , was one of the first re-foam jobs I ever did (along with a re-cap too)
I do remember thinking the surrounds seem kinda rigid , thick.

The speakers have a good top end a real nice mid-range but are definitely lacking in the bass department.

Thinking the surrounds i used were more suited for a ported,bass reflex design rather than acoustic suspension speakers.

Could be whats going on with the OP's set of XP 9's.

03-28-2015 3.JPG
 
Last edited:
So
hjames said:
Welcome to AudioKarma.
I don't know anything about fisher speakers, but in the future,
you might want to take a look around at the site in general before you just
drop a post in whatever place you happen to be standing.
I moved your post from New Software to "Speakers" - its more appropriate.
Click to expand...
Sorry for the mistake and thank you a lot
 
Thank you all for your great answers
I switched in one speaker between +/- and the expected great bass arrived
I'm sure that the connections done exactly as they were before i disconnected the woofers (black minus, white plus) it means that in one of the speakers the wiring is wrong.
Next step is recapping and wiring check

The 15" bass is brutal deep and strong, very different from my xp-7c
 
Cheap and easy. My favorite kind of fix.
It's not unheard of for speaker terminals to be wrongly labeled.
Did you check the other end of the cables, maybe they were switched at the receiver.
 
Last edited:
goodolpg said:
Cheap and easy. My favorite kind of fix.
It's not unheard of for speaker terminals to be wrongly labeled.
Did you check the other end of the cables, maybe they were switched at the receiver.
Click to expand...

Sure, this is the first thing I've checked.
Its inside one of the speakers
 
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