[chiefroastbeef]

Hi guys,

I recently soldered a pair of 75 ohm resistors onto my Freqshow cable with a neutrik plug. However, the left side is slightly louder than my right, is this due to unbalanced resistors? My soldering is pretty decent, so I don't think it's due to a bad joint.

Should I just get a bunch of resistors, and test the ohm of the resistors, and pair the ones that have the closest values?

Thanks

 

[Rick]

Is there a valid reason for this? resistors in the line of audio path == more distortion.......not to mention, why would you want to make your headphones less efficient?

 

[Rick]

and its because you didnt match up resistors...resistors of the same specs are not identical....you need to use a voltmeter and match 2 identical.

 

[nikongod]

Quote:

Originally Posted by fsma /img/forum/go_quote.gif Is there a valid reason for this? resistors in the line of audio path == more distortion.......not to mention, why would you want to make your headphones less efficient?

good call, resistors do have some distortions. Please compare the magnitude of the distortion of the worst resistor you have ever seen to the best A: speaker/headphone driver and B: amplifier.

it is done as a deliberate effort to reduce amplifier damping factor. For whatever reason, some headphones sound better with very low damping factors.

 

[Rick]

then his problem is more than likely that he did match up his resistors. though I doubt he'd notice the at most 1% difference in volume level...

Unless he put a resistor on the left and right wires but not the ground?

 

[Mr Incredible]

You shouldn't a resistor on the ground should you? And it depends on the quality of the resistor, different qualities have different tolerances, some can be up to 5 or 10% off their noted value.

 

[Juaquin]

The problem, like others have said, is mismatched resistors. Buy a dozen or so high-quality, good tolerance (1% or less) resistors, then test them out and pick the two with the closest values. You may want to test them in an audio line first before doing the final install, to make sure the volume is equal.

 

[chiefroastbeef]

Thanks guys for the input! So I gotta use the voltmeter to determine the closest values?

 

[DaMnEd]

Set your multimeter to ohm at the appropriate range and choose two resistors that are closer to each other.

You should probably read this: Hand-Matching Resistors to Tighter Tolerances

 

[chiefroastbeef]

Thanks for that! I searched for "resistor balancing" on google and came up with nothing. I'm surprised I missed that article on tangent's site, I mopped that site up.

Thanks again.