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Post by Mr Trev on Jul 15, 2023 21:08:24 GMT
MY A2C have developed a sometimes unbalanced sound. I initially assumed that it was probably because the earpads were getting old and "rolled" (if you're familiar with Aeons, you know what I'm talking about) I recently read on ASR an instance where somebody had an impedence mismatch that was causing his unbalance, so I decided to check mine. Initially, I would get a reading of ~15 ohms on both channels, but after about 1 hour of music playing the impedence would be off by 2 ohms or more (eg. measuring off the TRS plug, I'd get 18 ohms on TS and 21 on TR)
Is there any chance this could be caused by something that wouldn't require an entire driver replacement - I got a quote on the driver replacements and I honestly don't know if I could be bothered to pay that much (warranty has expired, of course).
BTW, I have checked the measurements using 2 different cables and got the same result with each one
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solderdude
Administrator
measureutternutter
Posts: 4,881
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Post by solderdude on Jul 17, 2023 7:58:49 GMT
MY A2C have developed a sometimes unbalanced sound. I initially assumed that it was probably because the earpads were getting old and "rolled" (if you're familiar with Aeons, you know what I'm talking about) I recently read on ASR an instance where somebody had an impedence mismatch that was causing his unbalance, so I decided to check mine. Initially, I would get a reading of ~15 ohms on both channels, but after about 1 hour of music playing the impedence would be off by 2 ohms or more (eg. measuring off the TRS plug, I'd get 18 ohms on TS and 21 on TR) Is there any chance this could be caused by something that wouldn't require an entire driver replacement - I got a quote on the driver replacements and I honestly don't know if I could be bothered to pay that much (warranty has expired, of course). BTW, I have checked the measurements using 2 different cables and got the same result with each one Sounds like a connector problem. It is not unusual for L and R drivers to be somewhat different in impedance. Could also be a driver issue. As these headphones are very low impedance a small change in resistance can already lead to level differences. What it is in your case I cannot tell.
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Post by Mr Trev on Jul 17, 2023 17:48:52 GMT
MY A2C have developed a sometimes unbalanced sound. I initially assumed that it was probably because the earpads were getting old and "rolled" (if you're familiar with Aeons, you know what I'm talking about) I recently read on ASR an instance where somebody had an impedence mismatch that was causing his unbalance, so I decided to check mine. Initially, I would get a reading of ~15 ohms on both channels, but after about 1 hour of music playing the impedence would be off by 2 ohms or more (eg. measuring off the TRS plug, I'd get 18 ohms on TS and 21 on TR) Is there any chance this could be caused by something that wouldn't require an entire driver replacement - I got a quote on the driver replacements and I honestly don't know if I could be bothered to pay that much (warranty has expired, of course). BTW, I have checked the measurements using 2 different cables and got the same result with each one Sounds like a connector problem. It is not unusual for L and R drivers to be somewhat different in impedance. Could also be a driver issue. As these headphones are very low impedance a small change in resistance can already lead to level differences. What it is in your case I cannot tell. Would it be worth cracking them open and trying to take a measurement directly off the drivers, or is this something that needs better measuring equipment than a multi-meter?
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oldson
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Post by oldson on Jul 23, 2023 14:02:08 GMT
interested in this as i fancy the A2C noire.
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solderdude
Administrator
measureutternutter
Posts: 4,881
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Post by solderdude on Jul 25, 2023 14:54:25 GMT
Sounds like a connector problem. It is not unusual for L and R drivers to be somewhat different in impedance. Could also be a driver issue. As these headphones are very low impedance a small change in resistance can already lead to level differences. What it is in your case I cannot tell. Would it be worth cracking them open and trying to take a measurement directly off the drivers, or is this something that needs better measuring equipment than a multi-meter? You could check the connector wiring. Just realize the measured Ohm values for L and R may not be the same.
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Post by Mr Trev on Aug 2, 2023 21:19:20 GMT
Would it be worth cracking them open and trying to take a measurement directly off the drivers, or is this something that needs better measuring equipment than a multi-meter? You could check the connector wiring. Just realize the measured Ohm values for L and R may not be the same. Turns out I don't have a proper screwdriver for those bitty Torx screws (T6, I think) so things remain stalled
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