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Post by porkyman on Dec 16, 2014 1:49:52 GMT -6
i always assumed there was no difference between the inputs on my jbl lsr28p's, but hooking up my rossmartin dac i needed a longer cable for my left speaker and only had an xlr to trs. when i plugged it in i thought the right channel wasnt working. after a while i realized it was, but it was way quieter so it sounded like everything was coming out of the left channel. the trs channel.
it seems like if anything it should be the other way around.
i ended up moving it closer so i could a/b between trs and xlr and i thought trs was better, but it was so much louder it was hard to match because i only have two outs and i had to change cables out every time.
any info/advice on this. i would really appreciate it.
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Post by svart on Dec 16, 2014 8:19:56 GMT -6
How much louder is it?
LSR28P, those don't have SPDIF input do they? I have the LSR4328P with the SPDIF inputs. I don't even use a DAC, just run straight into them with the digital.
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Post by jimwilliams on Dec 16, 2014 11:20:51 GMT -6
Finish that PCM1794 DAC and that won't happen anymore.
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Post by porkyman on Dec 16, 2014 12:10:53 GMT -6
Finish that PCM1794 DAC and that won't happen anymore. I dont understand what you mean. Thanks everyone for the responses. |
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Post by horvitz on Dec 18, 2014 7:34:32 GMT -6
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Post by Deleted on Dec 18, 2014 10:57:49 GMT -6
That's it, porkyman.
As Superwack and Brian stated. The monitors have extra active gain on the 1/4" jacks to match level gain of prosumer/consumer gear to the pro-level XLR.
Everything ok with both pieces of equipment, the different levels are intentional. Use same type of cable / plugs left and right, and the problem is gone. Alternatively, run the monitors with digital in, like svart proposed.
But i guess you want the Ross Martin for high fidelity DAC on the analog input, right....?
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Post by Calvin on Dec 18, 2014 13:13:41 GMT -6
Horvitz and smallbutfine already mentioned most of this. The TRS jack is designed for -10dBv input, which means there will be quite a bit more gain than you will see with the +4dBu XLR inputs. The real key is to understand the output level of your DAC. It is probably designed/set for +4dBu operation, which means you really ought to stick with the XLR inputs. You'll run out of headroom quicker if you try to use the -10dBv inputs. In other words, you won't be able to use all of the output of your DAC if you use the -10 dBv inputs of your monitors (you'll cause the monitors to clip due to the extra gain using the TRS inputs).
By the way, congratulations on owning the LSR28p monitors. They are what I use, as well, and I quite like them.
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Post by porkyman on Dec 19, 2014 12:14:27 GMT -6
Thanks guys. I really appreciate it. Can i ask how hot you run your signals in +4 environment. For ex. My lola pre has a +4 marker on led meter crossover point. Would you run hot enough to hit it or is it supposed to be peak. I dont understand the different db levels u/v etc. I have always tried to keep my levels between -18 and -14 on my daw meters protools 10. Thanks
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Post by tonycamphd on Dec 19, 2014 12:28:53 GMT -6
Thanks guys. I really appreciate it. Can i ask how hot you run your signals in +4 environment. For ex. My lola pre has a +4 marker on led meter crossover point. Would you run hot enough to hit it or is it supposed to be peak. I dont understand the different db levels u/v etc. I have always tried to keep my levels between -18 and -14 on my daw meters protools 10. Thanks in the analog domain (electricity) it's important to optimize you gain stages (meaning keeping the signal as hot as possible throughout before distortion, to get the max signal to noise floor ratio/difference, although with analog gear, hitting it with an over hot signal can impart glorious harmonic distortion that sounds great), this over hot is an absolute NO NO with 1's/0's in the digital domain, the only reason to go hotter in the digital domain (and not such a good reason anymore) is to optimize bit depth. i hope this was what you were asking? if not, please disregard 8) |
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