Scorpion667
500+ Head-Fier
- Joined
- Dec 13, 2012
- Posts
- 513
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- 102
I just got my AK100 back from repairs (sent it to A&K in US for in warranty repair). Getting the exact same bluetooth buzzing issue for which I sent it in. I don't think I will do business with A&K for a while.
Link to email thread.
Link to the beeping/buzzing audio sample, as heard from my SE846 connected to AK100 paired with any bluetooth device, including A&K official BT remote.
I'm not impressed.
Before you suggest further troubleshooting, please see the extensive troubleshooting list I sent to A&K:
Link to email thread.
Link to the beeping/buzzing audio sample, as heard from my SE846 connected to AK100 paired with any bluetooth device, including A&K official BT remote.
I'm not impressed.
Before you suggest further troubleshooting, please see the extensive troubleshooting list I sent to A&K:
Troubleshooting as follows:
-when IAA01 iRiver Bluetooth remote is connected to iPhone, no buzzing at all, works perfectly
-buzzing happens regardless if I turn off my phone, it's not related 3g/LTE interference
-buzzing happens even if I am in a non-wifi area with phone powered off, i.e middle of an empty field
-disabling bluetooth on AK100 makes the buzzing stop
-buzzing ONLY happens if music is playing, even at zero volume
-if music is paused, buzzing stops. I can then use remote to toggle EQ/Repeat without any buzzing sounds
-re-pairing does not resolve issue
-upgrading firmware from 2.30 (this is what it shipped with) to 2.40(latest) did not resolve issue
-pairing ak100 to iPhone only (all other BT devices turned off) yields constant beeping instead of buzzing (different BT protocol?)
-charging ak100 did not fix
-keeping ak100 connected to a properly grounded charger or PC does not fix
-placing hand at back/side of ak100 changes the pitch of the buzzing/beeping
-I have to clarify, buzzing occurs on all my headphones/IEM's I am using, although is most obvious on the very sensitive SE846 IEM. The higher the headphone impedance, the quieter the buzzing is.
-I can just BARELY hear the buzzing on my 50ohm Pro 900 headphones. Moderate buzzing volume on 32ohm T51p and unacceptable buzzing on SE846
-iriver FAQ/Manual does not mention anything about this at all
-When testing my iRiver remote on the AK100 at Headfoneshop, the demo unit did not produce any hissing whatsoever. As such, it seems to be a logical conclusion that my unit either has a defective Bluetooth module or improper RD shielding.
-when IAA01 iRiver Bluetooth remote is connected to iPhone, no buzzing at all, works perfectly
-buzzing happens regardless if I turn off my phone, it's not related 3g/LTE interference
-buzzing happens even if I am in a non-wifi area with phone powered off, i.e middle of an empty field
-disabling bluetooth on AK100 makes the buzzing stop
-buzzing ONLY happens if music is playing, even at zero volume
-if music is paused, buzzing stops. I can then use remote to toggle EQ/Repeat without any buzzing sounds
-re-pairing does not resolve issue
-upgrading firmware from 2.30 (this is what it shipped with) to 2.40(latest) did not resolve issue
-pairing ak100 to iPhone only (all other BT devices turned off) yields constant beeping instead of buzzing (different BT protocol?)
-charging ak100 did not fix
-keeping ak100 connected to a properly grounded charger or PC does not fix
-placing hand at back/side of ak100 changes the pitch of the buzzing/beeping
-I have to clarify, buzzing occurs on all my headphones/IEM's I am using, although is most obvious on the very sensitive SE846 IEM. The higher the headphone impedance, the quieter the buzzing is.
-I can just BARELY hear the buzzing on my 50ohm Pro 900 headphones. Moderate buzzing volume on 32ohm T51p and unacceptable buzzing on SE846
-iriver FAQ/Manual does not mention anything about this at all
-When testing my iRiver remote on the AK100 at Headfoneshop, the demo unit did not produce any hissing whatsoever. As such, it seems to be a logical conclusion that my unit either has a defective Bluetooth module or improper RD shielding.