The jumper is the black piece that sticks up, yes? What would one do to it to convert a Vise Grip to a Studio Bass?
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seymour duncan studio bass compressor
- Thread starter AdamR
- Start date
I played around with the jumper on mine. It definitely changes the dry EQ that is effected by the switch. Makes it real trebley.
Bongo: Im interested to find this uses a THAT 4315 VCA chip which is a "budget version" of the 4320 you would find in the Keeley Bassist. The 4315 uses the same Blackmer VCA and RMS sensor as the 4320, it just doesn't have the built in op-amps. With some knob fiddling, it should be able to dial in similar/identical compression compared to the Keeley.
Bongo: Im interested to find this uses a THAT 4315 VCA chip which is a "budget version" of the 4320 you would find in the Keeley Bassist. The 4315 uses the same Blackmer VCA and RMS sensor as the 4320, it just doesn't have the built in op-amps. With some knob fiddling, it should be able to dial in similar/identical compression compared to the Keeley.
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Do you know if the Jumper also affect the max Gain and Attack ? those two parameters are also different between vise grip & studio bass..
The one I opened have Rev6 on the boards (and there is only 2 boards)
The one I opened have Rev6 on the boards (and there is only 2 boards)
Oh, sorry man... I didn't notice a difference in that, but I wasn't paying attention to it.
Thank you for the detailled pics, definitly the "last" version with only 2 pcb.
Do you know what is on the otherside of the Control Board ? I suspect there is another jumper or something like that because there is both a Bass and a Guitar square to tick...
Do you know what is on the otherside of the Control Board ? I suspect there is another jumper or something like that because there is both a Bass and a Guitar square to tick...
Sorry, I cant really bother to remove the pots and unscrew them at this moment.
If we had the internal pics of guitar version insides I would do it, for science.
Take a look at the control board pcb. There are no soldering points indicating that header pins (for jumper) are on the other side.
If we had the internal pics of guitar version insides I would do it, for science.
Take a look at the control board pcb. There are no soldering points indicating that header pins (for jumper) are on the other side.
true about the header pins, didn't think about checking for soldering point on that !Does the fact that it is using THAT 4315 IC mean the release time is dependent on Attack knob and it is moving it in 10x ratio?
I am getting a discernible increase in volume when raising Compression knob. It is easily corrected with negative makup gain but I did not see this behavior in MB Compresore or MXR BassComp.
I am getting a discernible increase in volume when raising Compression knob. It is easily corrected with negative makup gain but I did not see this behavior in MB Compresore or MXR BassComp.
I was told by SD that the Comp knob is "Comp Ratio / Threshold / Make up gain".
So, Level is an output (post comp) gain i suppose ?
I would like to see a Function Diagram of this comp...
So, Level is an output (post comp) gain i suppose ?
I would like to see a Function Diagram of this comp...
bongomania
Commercial User
Hello guys !
I'm I the only "overloading" the pedal with EMG pickups (TW in dual coil mode) ? When I add some clean level with the Blend knob, if I go past 12 o'clock it start to distort (clipping?) on the attack of the note...
Also, it is quite noisy, but only during compression phase. I meen there is an added hiss when the compressor is in compression phase and not present when not compressing (ie after the release)
Any idea ?
I'm I the only "overloading" the pedal with EMG pickups (TW in dual coil mode) ? When I add some clean level with the Blend knob, if I go past 12 o'clock it start to distort (clipping?) on the attack of the note...
Also, it is quite noisy, but only during compression phase. I meen there is an added hiss when the compressor is in compression phase and not present when not compressing (ie after the release)
Any idea ?
There is a chance you are clipping the EBS pre. Try it with the pad engaged.
Try lower bass output, maybe you are clipping the comp circuit.
One more thing, this compressor works with higher voltages, try it with 12V at least. If you can, and want to be sure that it is not the headroom, use 18V (max rating).
Try lower bass output, maybe you are clipping the comp circuit.
One more thing, this compressor works with higher voltages, try it with 12V at least. If you can, and want to be sure that it is not the headroom, use 18V (max rating).
It's very audible with headphones...
I tried different basses (active, passive), different signal path, different headphone out/monitors, the problem is always the same as soon as I active the comp pedale. Is your that much "noisy" ?
Btw, it got facelifted :
Nit sure it look better, but i think there is something different inside because the Attack time is not the same
I tried different basses (active, passive), different signal path, different headphone out/monitors, the problem is always the same as soon as I active the comp pedale. Is your that much "noisy" ?
Btw, it got facelifted :
Nit sure it look better, but i think there is something different inside because the Attack time is not the same
I prefer the older look. The new one is too flashy for me.
Meanwhile, if they wanted to make the pedal flashy, why did they keep the dull name?
Meanwhile, if they wanted to make the pedal flashy, why did they keep the dull name?
I have 2 of these, one "old" version, and a new one (like pictured above) and honestly, I like the new look. 
I rehearse with headphones as well, and I can't hear any discernable difference between the two pedal versions, and neither seems any noisier than my other 3 comps (Keeley Bassist, MXR M87 & Markbass Compressore)...The noisiest one I have is the MXR by a large margin.
Of all the comps I have (and have tried), I just keep coming back to the Seymour Duncan Comp, it just "works for me".
These are of course just my opinions, based on what I hear with my specific gear...I have no way of actually backing it up LOL!
I rehearse with headphones as well, and I can't hear any discernable difference between the two pedal versions, and neither seems any noisier than my other 3 comps (Keeley Bassist, MXR M87 & Markbass Compressore)...The noisiest one I have is the MXR by a large margin.
Of all the comps I have (and have tried), I just keep coming back to the Seymour Duncan Comp, it just "works for me".
These are of course just my opinions, based on what I hear with my specific gear...I have no way of actually backing it up LOL!
