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Post by lolo on Apr 27, 2015 23:06:37 GMT -6
If I use a Y cable XLR F to TRS balanced out of my pre into my patchbay (into A/D or compressor etc...) Obviously nice to go into a compressor on one channel of the A/D and on the other channel uncompressed and record both. Here is the QUESTION... What if I only use one side of the Y cable and the other is just "hanging out" :-)  Will I loose any quality, weaker signal than just using a normal XLR to TRS balanced. Only reason for using the Y cable is that I just rewired everything in the studio and wired up my patchbay and its the only cable I have left. And its a good quality cable, mogami, neutrik connectors etc... Or I can just go and buy another cable....  |
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Post by svart on Apr 28, 2015 7:37:05 GMT -6
If I use a Y cable XLR F to TRS balanced out of my pre into my patchbay (into A/D or compressor etc...) Obviously nice to go into a compressor on one channel of the A/D and on the other channel uncompressed and record both. Here is the QUESTION... What if I only use one side of the Y cable and the other is just "hanging out" :-) Will I loose any quality, weaker signal than just using a normal XLR to TRS balanced. Only reason for using the Y cable is that I just rewired everything in the studio and wired up my patchbay and its the only cable I have left. And its a good quality cable, mogami, neutrik connectors etc... Or I can just go and buy another cable.... Splitting can work, in some situations. Remember, that when splitting a cable, you are burdening the preamp(source) with more load. For example, if you have a 600R output preamp (like neve/api) going into two line level inputs (10K-47K impedance) that you'll be doubling the load (and halving the numerical impedance, down to 5K-23.5K). 5K might be right on the lower end of the impedance range before you start having issues with frequency response. Now, if you go into a 10K line input, and the other end goes into an old 600R input, then your equation is Rp = 1/(1/R1+1/R2+1/R3 ...) So 1/(1/10000+1/600) = 566R Your load is now 566 ohms to the preamp and you're probably going to start hearing drastic problems. Your other question was what would happen if you left the other end of the Y cable unterminated? Not much if it's a differential/balanced cable at both outputs. At these impedances and signal levels, I wouldn't expect much in the way of noise unless the unterminated output is near some noise source, like a power transformer or a digital effects box. You could use it without much issue for the short term, but I'd eventually find a permanent cable to use. |
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Post by lolo on Apr 29, 2015 9:12:30 GMT -6
If I use a Y cable XLR F to TRS balanced out of my pre into my patchbay (into A/D or compressor etc...) Obviously nice to go into a compressor on one channel of the A/D and on the other channel uncompressed and record both. Here is the QUESTION... What if I only use one side of the Y cable and the other is just "hanging out" :-) Will I loose any quality, weaker signal than just using a normal XLR to TRS balanced. Only reason for using the Y cable is that I just rewired everything in the studio and wired up my patchbay and its the only cable I have left. And its a good quality cable, mogami, neutrik connectors etc... Or I can just go and buy another cable.... Splitting can work, in some situations. Remember, that when splitting a cable, you are burdening the preamp(source) with more load. For example, if you have a 600R output preamp (like neve/api) going into two line level inputs (10K-47K impedance) that you'll be doubling the load (and halving the numerical impedance, down to 5K-23.5K). 5K might be right on the lower end of the impedance range before you start having issues with frequency response. Now, if you go into a 10K line input, and the other end goes into an old 600R input, then your equation is Rp = 1/(1/R1+1/R2+1/R3 ...) So 1/(1/10000+1/600) = 566R Your load is now 566 ohms to the preamp and you're probably going to start hearing drastic problems. Your other question was what would happen if you left the other end of the Y cable unterminated? Not much if it's a differential/balanced cable at both outputs. At these impedances and signal levels, I wouldn't expect much in the way of noise unless the unterminated output is near some noise source, like a power transformer or a digital effects box. You could use it without much issue for the short term, but I'd eventually find a permanent cable to use. Thanks man, yeah i should just grab a new cable ..... |
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