headfone
Banned
Now known as alphaman
- Joined
- Mar 21, 2006
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I'm sure there is a posting (= obvious answer) on this topic somewhere (other than this thread) ... so apologies in advance for any redundancy.
When plugging IEMs into certain NON-portable amps -- e.g., PPA2, Meier Corda -- I've noticed a "default" hiss (i.e., hiss at minimal volume ... nothing playing) that varies from negligible (Headroom Little) to intolerable (PPA2).
I've noted this in both Shure IEMs I own. I do not hear it in full-sized cans: Senn 650, AKG 701, Grado 325i, etc.
Also, I don't hear hiss on all portable head amps I've used (Xin, Go-vibe) or straight out of 'phones jack ofn portable players.
In your experience or best guess, what's the source(s): Impedance, Sens, combination of these, etc.?
Shure SE530 relevant specs:
Sensitivity (1mW): 119 dB SPL/mW
Impedance (1kHz): 36 ohm
Full-sized cans have higher impedance, but not sure what sens. metrics are.
When plugging IEMs into certain NON-portable amps -- e.g., PPA2, Meier Corda -- I've noticed a "default" hiss (i.e., hiss at minimal volume ... nothing playing) that varies from negligible (Headroom Little) to intolerable (PPA2).
I've noted this in both Shure IEMs I own. I do not hear it in full-sized cans: Senn 650, AKG 701, Grado 325i, etc.
Also, I don't hear hiss on all portable head amps I've used (Xin, Go-vibe) or straight out of 'phones jack ofn portable players.
In your experience or best guess, what's the source(s): Impedance, Sens, combination of these, etc.?
Shure SE530 relevant specs:
Sensitivity (1mW): 119 dB SPL/mW
Impedance (1kHz): 36 ohm
Full-sized cans have higher impedance, but not sure what sens. metrics are.