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Anyone have any idea what this knob and switch do??

B

Brild

Aug 14, 2021
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#1
I've had this Ibanez Soundgear SR-750 since 2012, and in all that time I've never been able to determine what the switch or the knob just above it(in the image) do. I assumed the switch was an Active/Passive switch, but the eq knobs still work in either position, and it doesn't seem to be a pickup selector either? My best guess on the knob is a pickup blend?

If anyone has any insight for me, I'd appreciate it, it's a beautiful instrument and I really just want to make it sound it's best
 

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#2
Just guessing but the two big knobs would be volume and blend, and the switch might be a midrange range select, or perhaps a coil tap or series / parallel switch? Does it affect the sound at all?
 
#3
They may not be hooked up to the preamp. I had a bass that was wired straight from the battery to the volumes (5 string jazz) and to the jack.
I played this bass for years and just thought it had a weak preamp.
A friend looked at it and noticed the preamp was completely bypassed. Might want to open the back up and look.
 
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#7
Fortunately (and obviously as well), the little switch is not SELF DESTRUCT ENGAGE.

IF the instructions in this 2012 Bass Manual from Ibby is correct, slide down to page 37 and they list a circuit for SR with V/T/3 knob EQ with that switch, which is a mid freq selector of either 250hz (bassier) or 600 hz (twangy-er).

bass2012.pdf (hoshinogakki.co.jp)
 
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#14
Brild said:
I've had this Ibanez Soundgear SR-750 since 2012, and in all that time I've never been able to determine what the switch or the knob just above it(in the image) do. I assumed the switch was an Active/Passive switch, but the eq knobs still work in either position, and it doesn't seem to be a pickup selector either? My best guess on the knob is a pickup blend?

If anyone has any insight for me, I'd appreciate it, it's a beautiful instrument and I really just want to make it sound it's best
Click to expand...

I have the same in a 5 string (755). It lights up the Christmas tree on the White House lawn. Seriously, it is a 250 / 600 hz mid freq selector. My Soundgear 1405 Premium (2012) has the same configuration.

755BodyFront.jpg
 
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#15
Brild said:
I've had this Ibanez Soundgear SR-750 since 2012, and in all that time I've never been able to determine what the switch or the knob just above it(in the image) do. I assumed the switch was an Active/Passive switch, but the eq knobs still work in either position, and it doesn't seem to be a pickup selector either? My best guess on the knob is a pickup blend?

If anyone has any insight for me, I'd appreciate it, it's a beautiful instrument and I really just want to make it sound it's best
Click to expand...
From top to bottom:

Volume, blend on left. Bass, mid, treble on right.

Switch is a mid frequency selector.
 
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#17
BassBrass said:
That's funny! Best left as is, but as with many newbie questions, probably needs explanation.
That's a placebo effect so the idiot producer thinks a change has been made and everything recorded hereafter will "sit in the mix better" (or some other subjective idiocy).
Click to expand...

Except in this instance boosting or cutting those mids in one of the two frequency ranges might add or subtract how it sits in the mix. Could it be both a placebo and a cure depending on where the mid knob is? At the center detention it would do nothing… at one extreme or the other the switch could make a significant difference.
 
#19
Hasty said:
Except in this instance boosting or cutting those mids in one of the two frequency ranges might add or subtract how it sits in the mix. Could it be both a placebo and a cure depending on where the mid knob is? At the center detention it would do nothing… at one extreme or the other the switch could make a significant difference.
Click to expand...
I was just defining "producer switch" akin to dummy "panic button". As to the Real switch, my first though that it might make a big difference at high volume (high sound pressure). Some settings and effects don't cut at high volume...add some high mids and there you are. My Lakland Skyline with Aguilar pre has that in the volume knob in or out switch. Bedroom sound-in. Loud in a band -try out if too boomy.
 
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#20
BassBrass said:
I was just defining "producer switch" akin to dummy "panic button". As to the Real switch, my first though that it might make a big difference at high volume (high sound pressure). Some settings and effects don't cut at high volume...add some high mids and there you are.
Click to expand...


oh I totally get it. It just struck me as funny that in this instance… the producer switch might actually be a useful producer switch.
 

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