Print Page | Close Window

looking for specs on potentiometers

Printed From: the12volt.com
Forum Name: Car Audio
Forum Discription: Car Stereos, Amplifiers, Crossovers, Processors, Speakers, Subwoofers, etc.
URL: https://www.the12volt.com/installbay/forum_posts.asp?tid=127137
Printed Date: May 10, 2024 at 6:12 AM


Topic: looking for specs on potentiometers

Posted By: mikeavery
Subject: looking for specs on potentiometers
Date Posted: April 27, 2011 at 8:24 AM

I'm looking to make my own remote bass control for my amp (jl1000/1) using a potentiometer. Wondering if anyone has done this before and has any info on what to use, as in 100k 10k pot or what the ranges are for full bass gain and no bass gain. Thanks in advance.



Replies:

Posted By: DYohn
Date Posted: April 27, 2011 at 9:35 AM
How do you plan to use the potentiometer?  Describe your circuit.

-------------
Support the12volt.com




Posted By: i am an idiot
Date Posted: April 27, 2011 at 10:12 AM

JL sells what you are looking for, they are usually around 40 dollars including the cable.  If you insist on making something yourself, you can build an inline (with the RCA cable that feeds the amp) You will need a 100K stereo pot from Radio Shack.  Part number 271-1732.  I have a picture posted somewhere here.  I will look for the diagram.





Posted By: i am an idiot
Date Posted: April 27, 2011 at 10:20 AM




Posted By: mikeavery
Date Posted: May 10, 2011 at 8:39 AM
ok i understand what your explaining but what i wanted to know is how do you know to use a 100k potentometer opposed to say a 10k? Also why not use the provided remote bass control on the amp via cat5 connection? Thanks again




Posted By: DYohn
Date Posted: May 10, 2011 at 9:26 AM

Using 100K will give you finer control VS using 10K and also allow more attenuation of the signal.  Also, and perhaps more importantly, the pot will provide a component of input impedance to the preamp that is driving it, and you want input impedance to be high.  100K input impedance is preferable and provides a more stable and less noisy system than 10K input impedance.

If your amp has remote bass control capability built in, purchase the correct interface and use that instead of trying to rig some solution yourself.



-------------
Support the12volt.com




Posted By: awdeclipse
Date Posted: May 10, 2011 at 9:35 AM
If your amp has a remote bass port then search around for the pinouts of that particular model amp.

Once you find the pin-outs most likely somebody has already done what you are looking to do.

Years back I made a remote display for a Phoenix Gold ZX450ti, i think the owners manual had the pin out though... Just power and Thermal LEDs if I remember correctly.

Or if you can buy it locally, pick one up, reverse engineer it and return it if you are looking to save a few bucks.




Posted By: mudslingur
Date Posted: May 10, 2011 at 11:51 PM

I have been wanting to do this also, except the amp is a US Amp USA-150 (1999) with the "RBG"- two pinout.

What pot should I get (the board has two 20k for the gain and four 20k for the sub freq.) and does anyone know what each pinout is? I have never seen a pot with only two connections...is one pin not used on a three pin pot? Thanks for any advice/info as these are almost impossible find and can't be that hard to make with the correct knowledge.





Posted By: i am an idiot
Date Posted: May 11, 2011 at 1:46 AM

It is very common for manufacturers to design the circuit to use a variable resistor. (Only use 2 legs of a potentiometer) 






Print Page | Close Window