post toastie
New member
why ?
thanks.
thanks.
25K Pots for Active pickups ?
- Thread starter post toastie
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Empty Pockets
BadHairDayologist
Re: 25K Pots for Active pickups ?
cuz that's what works.
cuz that's what works.
F
Funkfingers
Guest
Re: 25K Pots for Active pickups ?
The overwhelming majority of modern active pickups are low impedance. These require control pots of correspondingly low impedance to avoid weird loading effects on the coil(s) and onboard pre-amplifier circuitry.
The overwhelming majority of modern active pickups are low impedance. These require control pots of correspondingly low impedance to avoid weird loading effects on the coil(s) and onboard pre-amplifier circuitry.
blueman335
Mojo's Minions
Re: 25K Pots for Active pickups ?
Actives don't have as many windings on the coils as passives do, which is why they need an assist from a battery to get the volume up to an audible level. That keeps the sound clean and sterile. Because of this they are also very bright; 25K's take off a lot of treble. While the additional windings in passives may add a little noise, they also add a lot of tone.
Actives don't have as many windings on the coils as passives do, which is why they need an assist from a battery to get the volume up to an audible level. That keeps the sound clean and sterile. Because of this they are also very bright; 25K's take off a lot of treble. While the additional windings in passives may add a little noise, they also add a lot of tone.
bryvincent
New member
Re: 25K Pots for Active pickups ?
most EMG pups are wound at 10K. but i think they have smaller magnets than the passive pups.
most EMG pups are wound at 10K. but i think they have smaller magnets than the passive pups.
LReese
Sausage Gravy
Re: 25K Pots for Active pickups ?
Check this out - If I got my facts straight the interesting thing is the output of the coils are "Mixed" via differential preamp - not like Series or Parallel wiring.
http://music-electronics-forum.com/t2145/
Check this out - If I got my facts straight the interesting thing is the output of the coils are "Mixed" via differential preamp - not like Series or Parallel wiring.
http://music-electronics-forum.com/t2145/
ratherdashing
Kablamminator
Re: 25K Pots for Active pickups ?
Ignore every other post thus far claiming to have the answer, because unless someone who actually knows WTF he's talking about sneaks in while I'm writing this they're all wrong.
The short answer is "impedance".
Passive pickups have a very high impedance (kind of another way of saying they have a weak signal). To have a reasonable effect on the signal the pots in a passive-equipped guitar need to have very high values to match the impedance of the pickups. I wish I could explain the technical side of that a bit better (hopefully someone with more EE knowledge will pop in), but all you really need to know is that high impedance pickups need high value pots to work correctly.
Active pickups have buffering and amplification built into them that drastically lowers the impedance of the passive coils. The signal they output is more like what you'd get from a pedal or a rack preamp. Relative to the impedance of the pickup, the 250k pot is HUGE. If you used a 250k pot in an active-equipped guitar, you'd only be able to use the very top of the control's range; you'd get no sound beyond that.
Ignore every other post thus far claiming to have the answer, because unless someone who actually knows WTF he's talking about sneaks in while I'm writing this they're all wrong.
The short answer is "impedance".
Passive pickups have a very high impedance (kind of another way of saying they have a weak signal). To have a reasonable effect on the signal the pots in a passive-equipped guitar need to have very high values to match the impedance of the pickups. I wish I could explain the technical side of that a bit better (hopefully someone with more EE knowledge will pop in), but all you really need to know is that high impedance pickups need high value pots to work correctly.
Active pickups have buffering and amplification built into them that drastically lowers the impedance of the passive coils. The signal they output is more like what you'd get from a pedal or a rack preamp. Relative to the impedance of the pickup, the 250k pot is HUGE. If you used a 250k pot in an active-equipped guitar, you'd only be able to use the very top of the control's range; you'd get no sound beyond that.
post toastie
New member
Re: 25K Pots for Active pickups ?
thank you folx !!!
i had indeed read that link earlier, but a more rounded explaination was just supplied by you, my forum bros. now with your guidance i am able to understand what i read on the link more fully.
in fact i was about to just run out and get 25k pots, cause thatś what was supplied in my Aria Pro II, but i figured i would research first (which often leads to more questions than answers).
so thank you once again Forum Bros. for the answers.
if there are any more thoughts, as always, please chime in.
ps:
i like to thank all the respondents when i have finished the project i needed help with (or feel i have enough info to move forward. if one has noticed that i may have a few threads where i have not replied with a ¨Thank You For Your Help¨ or words to that effect, it usually means that i have not come to the conclusion of the given project, thereby (supposedly) leaving the thread open for follow-ups from myself - or others.
but i surely mean to thank anyone who has ever chimed in with helpful info.
so Thank You All !!!!
thank you folx !!!
i had indeed read that link earlier, but a more rounded explaination was just supplied by you, my forum bros. now with your guidance i am able to understand what i read on the link more fully.
in fact i was about to just run out and get 25k pots, cause thatś what was supplied in my Aria Pro II, but i figured i would research first (which often leads to more questions than answers).
so thank you once again Forum Bros. for the answers.
if there are any more thoughts, as always, please chime in.
ps:
i like to thank all the respondents when i have finished the project i needed help with (or feel i have enough info to move forward. if one has noticed that i may have a few threads where i have not replied with a ¨Thank You For Your Help¨ or words to that effect, it usually means that i have not come to the conclusion of the given project, thereby (supposedly) leaving the thread open for follow-ups from myself - or others.
but i surely mean to thank anyone who has ever chimed in with helpful info.
so Thank You All !!!!
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