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  #1  
Old 03-24-2009, 03:55 PM
Figuto Figuto is offline
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Default NWZ-A829 hisses with ER-4P

Why? This player sounds better than i7 to me but the hissing. I listen to a normal equalizer, without enhancements. Is there some resolution?
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  #2  
Old 03-24-2009, 06:24 PM
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The DarkSide The DarkSide is offline
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Hmm, the ER-P4 is rated @27ohms, so I'm not too sure why they would hiss so w/the Sony. Here's the specs, for reference.

ER•4 Technical Specifications
Response Accuracy:
ER•4S MicroPro Earphones: 92%
ER•4P MicroPro Earphones: 86%
Noise Isolation: 35-42 dB Frequency response: 50-10 kHz 2 dB; 20-16 kHz 4 dB
Acoustic polarity: + electrical = + acoustic
Transducer type: balanced armature
1 kHz sensitivity (ER•4B/ER•4S): 108 dB SPL for a 0.79 V input
(90 dB @ 0.1 V; 100 dB @ 1mW)
1 kHz sensitivity (ER•4P): 108 dB SPL for a 0.2 V input
(102 dB @ 0.1 V; 106 dB @ 1mW)
Impedance (ER•4B/ER•4S): 100 Ohms nominal
Impedance (ER•4P): 27 Ohms nominal
Maximum output: 122 dB SPL
Maximum continuous input (ER•4B/ER•4S): 3.0 Vrms
Maximum continuous input (ER•4P): .75 Vrms
Weight: less than 1 oz.



May I suggest looking for an "impedance adapter" w/a Google search?
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  #3  
Old 03-25-2009, 03:10 AM
Figuto Figuto is offline
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You mean this http://www.headphone.com/guide/by-ma...4s-adapter.php . But then there will be a problem with Sony's output power, isn't it? I don't want to buy a headphone amp...
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