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bluesaintg1
Joined: 30 Dec 2018 Posts: 2
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Posted: Sun Dec 30, 2018 10:13 am Post subject: G1 Air: Line Out not working |
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I'm trying to connect an external headphone amp and doesn't seem to work. When I use the same cable and connect to the headphone output it works so i know my cable and system is working. Any trick to get lineout working? |
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voip Platinum Member
Joined: 27 Nov 2014 Posts: 3777
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Posted: Mon Dec 31, 2018 10:34 am Post subject: |
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Which headphone amp are you using? |
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bluesaintg1
Joined: 30 Dec 2018 Posts: 2
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voip Platinum Member
Joined: 27 Nov 2014 Posts: 3777
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Posted: Tue Jan 01, 2019 7:05 pm Post subject: |
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Curiously, manuals for both of these headphone amplifiers do not give any figures for input impedance in the specification section, which seems to be a bit of an omission. The G1 Air user manual does not give figures for the impedance of the Line outs, either. Historically, Line In and Line Out were specified at 600 ohms for professional audio equipment, but this seems not to be strictly adhered to in modern equipment. A large impedance mismatch, where the Line Out impedance of a sound source was high and the Line In impedance of an amplifier was low, would lead to quiet audio, but not to zero audio, which seems to be the case here, so suspect a faulty Line Out on the G1 Air. |
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