Hi. I'm a new poster, long time fan of this forum. I have a question that I haven't been able to wrap my mind around after the usual google research. Impedance matching when using studio amps (QSC, Crown, Behringer, etc) in a home audio setup.
Component Chain
Technics turntable [RCA] MF V-LPS phono pre [RCA] TC-716 source selector [RCA or RCA-to-XLR cable] rack mount EQ [XLR] rack mount Crown XLS 402 amp [12awg] speakers
Consumer Components:
I have two sources. A phono preamp that outputs 1.8V with an output impedance of 1K ohms. And a FiiO DAC that ouptuts 1.5V and doesn't specify the output impedance, but I'm guessing it's also 1K ohms, which seems to be a standard. I'll run these through a TCC TC-716 passive source selector rather than a preamp. All using RCA jacks.
Studio Equipment:
ART EQ341 has RCA jack inputs on it (input impedance 15K ohms). There is an option for XLR inputs on this EQ as well with a higher impedance of 20K ohms. This then hooks up to a Crown amp that only has XLR inputs (balanced 20K ohms, unbalanced 10K ohms) with an input sensitivity of 1.25 Volts
I'm very confused at how all this works. Looking at home audio equipment, I see input impedance of 47K ohms on a lot of it, this pro equipment seems to present 10-20K input impedance. I don't know whether to use the RCA inputs on the EQ or get a cable that converts RCA to XLR so I can present a 20K ohm input to the source equipment. I'm also not sure if I need to buy something along the lines of one of these ( http://www.bhphotovideo.com/c/product/748845-REG/Sescom_SES_OTL_UB_SES_OTL_UB_2_Channel_RCA_to.html )
Then there's some things I'm seeing about -10dBV and +4dBV, which seems to be related. Of course the goal is to maximize the matching and get the most out of the amp and source equipment. Any links to good tutorials or advice would be greatly appreciated. Believe it or not, I studied engineering many moons ago, but I haven't been able to find a good website to figure this out yet. THANKS!
Component Chain
Technics turntable [RCA] MF V-LPS phono pre [RCA] TC-716 source selector [RCA or RCA-to-XLR cable] rack mount EQ [XLR] rack mount Crown XLS 402 amp [12awg] speakers
Consumer Components:
I have two sources. A phono preamp that outputs 1.8V with an output impedance of 1K ohms. And a FiiO DAC that ouptuts 1.5V and doesn't specify the output impedance, but I'm guessing it's also 1K ohms, which seems to be a standard. I'll run these through a TCC TC-716 passive source selector rather than a preamp. All using RCA jacks.
Studio Equipment:
ART EQ341 has RCA jack inputs on it (input impedance 15K ohms). There is an option for XLR inputs on this EQ as well with a higher impedance of 20K ohms. This then hooks up to a Crown amp that only has XLR inputs (balanced 20K ohms, unbalanced 10K ohms) with an input sensitivity of 1.25 Volts
I'm very confused at how all this works. Looking at home audio equipment, I see input impedance of 47K ohms on a lot of it, this pro equipment seems to present 10-20K input impedance. I don't know whether to use the RCA inputs on the EQ or get a cable that converts RCA to XLR so I can present a 20K ohm input to the source equipment. I'm also not sure if I need to buy something along the lines of one of these ( http://www.bhphotovideo.com/c/product/748845-REG/Sescom_SES_OTL_UB_SES_OTL_UB_2_Channel_RCA_to.html )
Then there's some things I'm seeing about -10dBV and +4dBV, which seems to be related. Of course the goal is to maximize the matching and get the most out of the amp and source equipment. Any links to good tutorials or advice would be greatly appreciated. Believe it or not, I studied engineering many moons ago, but I haven't been able to find a good website to figure this out yet. THANKS!