ErkyPerky
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Excellent. Thanks.
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Topping L70 Headphone Amp Review
- Thread starter amirm
- Start date
grogzilla
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- Nov 3, 2024
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Hi, everybody. I unfortunately don't know much about electronics, but I'm trying to understand things. From what I've gleaned, it seems like it's usually desired for the input impedance on a device to be at least 10-20 times the output impedance of the other device connected to the inputs. What happens if it's a 1:1 ratio between balanced connections instead of 10:1 or higher? Would this cause significant issues of some kind?
I currently have an audio interface (Roland Quad-Capture) that has a specified output impedance of 2k ohms on the balanced outs (TRS), which might be okay when connecting directly to some active monitors that have an input impedance of up to 20k ohms, but maybe not when trying to connect to something like the balanced inputs of this L70 and some other Topping amps? It's been mentioned previously that the input impedance on the L70 is around the same 2k ohms as the output impedance of this interface, so I'm just wondering if hooking the interface up to the amp through their balanced connections would cause problems. The headphone out on the interface has a relatively high output impedance of 47 ohms, so most of my headphones don't "match" well with it, either, but I could potentially run a 1/4" to dual RCA adapter from the headphone out of the interface into the RCA line-ins of the L70 if that would work better. Or is there some other way of doing this that would be more ideal, besides replacing the interface with something that has a lower output impedance?
I currently have an audio interface (Roland Quad-Capture) that has a specified output impedance of 2k ohms on the balanced outs (TRS), which might be okay when connecting directly to some active monitors that have an input impedance of up to 20k ohms, but maybe not when trying to connect to something like the balanced inputs of this L70 and some other Topping amps? It's been mentioned previously that the input impedance on the L70 is around the same 2k ohms as the output impedance of this interface, so I'm just wondering if hooking the interface up to the amp through their balanced connections would cause problems. The headphone out on the interface has a relatively high output impedance of 47 ohms, so most of my headphones don't "match" well with it, either, but I could potentially run a 1/4" to dual RCA adapter from the headphone out of the interface into the RCA line-ins of the L70 if that would work better. Or is there some other way of doing this that would be more ideal, besides replacing the interface with something that has a lower output impedance?
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