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#1
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Unexpected results from small Behringer mixer testing
I'm more of a software guy than hardware, so I haven't used mixers much. I was surprised at what I was finding w/ a small used Behringer Eurorack UB-1202 I grabbed on eBay. I was running a single channel from my player into each input to test with a 1/4" TS plug. Everything was working fine until I got to the paired (L&R) line inputs #9-#16. When I plugged the cable into each of the left-side inputs, all was good. But when I plugged into each of the right-side inputs I could barely hear a signal. I double-checked the pan settings and they were all centered. I tried jiggling the plug, although the odds of all four having a bad jack was infinitesimal. The markings on the mixer show "mono" for the Ls and "BAL OR UNBAL" for the Rs. I might have a misunderstanding of the inner workings, and I was not able to find documentation to give me a definitive answer. But I was expecting a TS plug would work the same in both the L and R inputs. My two theories of why that isn't true a
1) A TRS plug is needed for either a balanced or unbalanced signal because the R side inputs connect to the RING not the TIP. (If this is true, then is it true for all inputs that can be both BAL or UNBAL - they always need a TRS plug?) OR 2) There's some auto-switching between the channel inputs of the same line whereby if you plug something into the R channel, you have to have something plugged into the corresponding L channel. Appreciate any augmentation to my knowledge on this topic. Thanks, - DK |
#2
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Unexpected results from small Behringer mixer testing
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#4
Posted to rec.audio.pro
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Unexpected results from small Behringer mixer testing
2) There's some auto-switching between the channel inputs of the same line whereby if you plug something into the R channel, you have to have something plugged into the corresponding L channel. Appreciate any augmentation to my knowledge on this topic. Thanks, - DK yes there is switching. if you have a mono source, plug it onto L in and it will feed both L and R. if you have a stereo source plug L to L and R to R. plugging only one input into the R is not defined. mark |
#5
Posted to rec.audio.pro
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Unexpected results from small Behringer mixer testing
On 4/23/2018 9:24 AM, wrote:
plugging only one input into the R is not defined. Of course it's defined. It goes to through the pan pot to the right output bus. Admittedly, it's not every day that you pan a signal hard to the right channel, but there's an output from a right-only-plugged source if you know where to look for it. If it's really not there, then something's broken. -- For a good time, call http://mikeriversaudio.wordpress.com |
#6
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Unexpected results from small Behringer mixer testing
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#7
Posted to rec.audio.pro
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Unexpected results from small Behringer mixer testing
On 25/04/2018 3:56 PM, Peter Larsen wrote:
On 23-04-2018 14:24, wrote: 2) There's some auto-switching between the channel inputs of the same line whereby if you plug something into the R channel, you have to have something plugged into the corresponding L channel. Appreciate any augmentation to my knowledge on this topic. Thanks, - DK yes there is switching. if you have a mono source, plug it onto L in and it will feed both L and R. if you have a stereo source plug L to L and R to R. plugging only one input into the R is not defined. Or there is a problem with the switch in left channel. I do not see it mentioned whether it worked as intended: as a stereo input. I read as OP was wanting to plus a 1/4" TRS in with L on tip and R on sleeve, rather than a mono jack tip (bal or unbal) going to L and R master bus channels. geoff |
#8
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Unexpected results from small Behringer mixer testing
On Sunday, April 22, 2018 at 8:28:34 PM UTC-4, wrote:
I'm more of a software guy than hardware, so I haven't used mixers much. I was surprised at what I was finding w/ a small used Behringer Eurorack UB-1202 I grabbed on eBay. I was running a single channel from my player into each input to test with a 1/4" TS plug. Everything was working fine until I got to the paired (L&R) line inputs #9-#16. When I plugged the cable into each of the left-side inputs, all was good. But when I plugged into each of the right-side inputs I could barely hear a signal. I double-checked the pan settings and they were all centered. I tried jiggling the plug, although the odds of all four having a bad jack was infinitesimal. The markings on the mixer show "mono" for the Ls and "BAL OR UNBAL" for the Rs. I might have a misunderstanding of the inner workings, and I was not able to find documentation to give me a definitive answer. But I was expecting a TS plug would work the same in both the L and R inputs. My two theories of why that isn't true a 1) A TRS plug is needed for either a balanced or unbalanced signal because the R side inputs connect to the RING not the TIP. (If this is true, then is it true for all inputs that can be both BAL or UNBAL - they always need a TRS plug?) OR 2) There's some auto-switching between the channel inputs of the same line whereby if you plug something into the R channel, you have to have something plugged into the corresponding L channel. Appreciate any augmentation to my knowledge on this topic. Thanks, - DK Thank you all for your responses. I filled in some gaps in my knowledge with yours, thanks. After more experimenting the answer became more obvious - the mixer is defective. Wiggling and inserting with more/less effort would cause the right inputs to work for a brief time and then they would drop out again. Sometimes pushing the level way up would have the same temporary effect. Regardless, the unit is unusable as is, and I don't have the time to try to fix it. #$%@*(! - DK |
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