When the pot is on low level settings the ipod sees essentially 10K. Even if you shorted the wiper and the pot were near minimum volume then the ipod still sees around the 10K region. When the pot is turned up the ipod sees a lower resistance (the exact value is dependent on what the pot feeds). So adding a low value resistor across the pot (or ipod output and ground) loads the ipod output stage more normally.
The only way to know for sure is to try it and see
Two seconds of a job. If you still have problems then a test sweep played back on the ipod and monitored on a scope would be the best way to see what is going on. Or even use a few fixed frequencies starting at say 20Hz and compare relative levels as frequecy increases.Edit... one area of confusion. Adding more resistance in parallel as I suggest lowers the overall resistance the ipod sees, not increases it
When the pot is on low level settings the ipod sees essentially 10K. Even if you shorted the wiper and the pot were near minimum volume then the ipod still sees around the 10K region. When the pot is turned up the ipod sees a lower resistance (the exact value is dependent on what the pot feeds). So adding a low value resistor across the pot (or ipod output and ground) loads the ipod output stage more normally.
The only way to know for sure is to try it and see
Edit... one area of confusion. Adding more resistance in parallel as I suggest lowers the overall resistance the ipod sees, not increases it
OK that makes sense. So what resistor should I use? and how do I wire it? I assume I put it between the positive and ground on both right and left? so two resistors?
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Pretty sure I have it hooked up right but I will triple check. Its also possible that the volume pot is a chinese knock off of the Alps and a piece of crap LOL
MP
Volume pots, used in the normal way, should not do anything much to bass. At most they might reduce bass at maximum if the source output cap is too low in value and the load is too low in resistance i.e. the opposite of what you are seeing. Something isn't what you/we think it is.
Bass will disappear if somehow you are seeing the difference between stereo channels. Is it possible that this could be happening? Does the output use a bridge-mode amp?
Bass will disappear if somehow you are seeing the difference between stereo channels. Is it possible that this could be happening? Does the output use a bridge-mode amp?
You need two equal value resistors. Anything around the 33 ohm region. Each one is wired as you say, across the output between positive and ground. So that means the easiest point is across the two outer pins of the pot. One for each channel.
Make sure the ground pins of the pot go to the ground (outer part) of the ipod headphone/line out socket.
are you using the headphone connection on the top or are you using an rca connector from an Idock or similar.
There are some articles about this on the net.
I had my Ipod connected by the headphone jack and had the exact same problem.
The bass is completely attenuated unless you run max volume from the Ipod.
If you use the apple connector on the bottom via a cable or a dock you will get much better sound but you will have no volume control via the Ipod
There are some articles about this on the net.
I had my Ipod connected by the headphone jack and had the exact same problem.
The bass is completely attenuated unless you run max volume from the Ipod.
If you use the apple connector on the bottom via a cable or a dock you will get much better sound but you will have no volume control via the Ipod
Sorry for reviving an old thread...
@ ExtraCredit1: Were you connecting the POTS to swipe the signal to ground before the amp (i.e. POT at 10kOhm = Full Volume, POT at 0kOhm = Mute)?
If this is the case, and there are existing capacitors on the inputs to your amp, then you are creating a high pass filter causing low frequencies to take a shortcut back to the ipod rather than going through the amp...
Typical input caps range between 0.22uF and 1.0uF.
Example: A 0.47uF cap is the same as a 7kOhm resistor @ 50Hz (Bass). The signal will take the path of least resistance, so at lower volumes your 10k POT will have less resistance than the Cap, causing the the low notes to shortcut back to the ipod through the POT, but the cap will still have a low resistance for the high notes (300 Ohm @ 1000Hz, 30 Ohm at 10kHz), causing them to go through the amp instead of the POT.
@ ExtraCredit1: Were you connecting the POTS to swipe the signal to ground before the amp (i.e. POT at 10kOhm = Full Volume, POT at 0kOhm = Mute)?
If this is the case, and there are existing capacitors on the inputs to your amp, then you are creating a high pass filter causing low frequencies to take a shortcut back to the ipod rather than going through the amp...
Typical input caps range between 0.22uF and 1.0uF.
Example: A 0.47uF cap is the same as a 7kOhm resistor @ 50Hz (Bass). The signal will take the path of least resistance, so at lower volumes your 10k POT will have less resistance than the Cap, causing the the low notes to shortcut back to the ipod through the POT, but the cap will still have a low resistance for the high notes (300 Ohm @ 1000Hz, 30 Ohm at 10kHz), causing them to go through the amp instead of the POT.
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