CHANGSTAR: Audiophile Headphone Reviews and Early 90s Style BBS
Lobby => DIY => Topic started by: wnmnkh on October 08, 2014, 05:45:27 PM
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I am rather confused with balanced configuration. For unbalanced, I could just put a resistor of desired resistance on signal path.
L/R --> Resistor --> headphones
G <-----------------
But I am a bit confused with balanced wiring. So what I see is L+, L- for left channel, and R+ & R- for right channel.
If I want to increase the impedance to 43 ohms (magic number from HDVD800), should I just put a 43ohm resistor on both L+ and R+ wires?
or do I have to put the resistors on all four (L+, L-, R+, R-) wires? if that's the case, should the value of the resistor 21.5ohm instead of 43ohm?
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Use a 22 Ohm resistor in series with each wire.
You will end up with a 44 Ohm resistor in balanced mode (as if the amp has a 44 Ohm resistance)
It is really the same as 43 Ohm so good enough.
Should you REALLY want the magic 43 Ohm than you would have to mount a 1k Ohm resistor in parallel to each 22 Ohm resistor.
You would end up with 43.05 Ohm (not counting tolerances nor wiring)
Or use a single 43 Ohm resistor in series with L+ and one in series with R+ and the L- and R- must be connected without a resistor.
From the 'all balanced' POV 4 resistors is closer to the 'ideal' in a technical sense it doesn't matter at all
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Thank you. I guess I will use a single 44 adapter for each positive wire (R+, L+)