bpribadi 0 Report post Posted July 21, 2004 I'm surprised for I own a Panasonic Sl-CT790 and connected to Porta Corda II via line/optical output but I detect no hiss at all. In fact, connection via headphone out results in lower gain, higher noise level and also a somewhat compressed sound - in terms of soundstaging dimensions. I mean, if there is no volume on the headamp, I can hear hissing sound when using iRiver volume (their line out is volumed). When using headamp with volume, no hissing sound heard. This is my experience, because I think iMP-150 line out is not so clean, so the hiss level will be audible when amplified. Probably your SL-CT790 is cleaner than the iMP-150. Share this post Link to post Share on other sites
bpribadi 0 Report post Posted July 21, 2004 bpribadi,maybe I can help you get the good case. such as this OEM case,the size is 100x60x200mm,pre-drill vol+headphone out jack+ac power+input. Thanks a lot Digi! I will consider your offer At the moment my next headamp is still in concept, so still long time until I need a casing. Thanks anyway! Bram Share this post Link to post Share on other sites
lekguan 0 Report post Posted July 21, 2004 I'm surprised for I own a Panasonic Sl-CT790 and connected to Porta Corda II via line/optical output but I detect no hiss at all. In fact, connection via headphone out results in lower gain, higher noise level and also a somewhat compressed sound - in terms of soundstaging dimensions. I mean, if there is no volume on the headamp, I can hear hissing sound when using iRiver volume (their line out is volumed). When using headamp with volume, no hissing sound heard. This is my experience, because I think iMP-150 line out is not so clean, so the hiss level will be audible when amplified. Probably your SL-CT790 is cleaner than the iMP-150. I'd like to believe that when you use your headamp with lineout you'll have to turn down the volume quite a fair bit? My guess would be that your gain is too high. Try lowering the gain until you get normal listening volume at about 75% of the lineout volume (just an anyhow suggestion, so that u get and idea) Share this post Link to post Share on other sites
bpribadi 0 Report post Posted July 22, 2004 My guess would be that your gain is too high. Try lowering the gain until you get normal listening volume at about 75% of the lineout volume (just an anyhow suggestion, so that u get and idea) The gain is 5.7, so I guess it is not too high, but the line out of my PCDP (iMP-150) is not clean (with hiss). When I got time I will post my theory why we need volume pot, based on my experienced. Share this post Link to post Share on other sites
Huffy 0 Report post Posted July 29, 2004 wondering if anyone can build me a heapdhone amp..wish to use it for future headphoens i may buy for my ipod (Sr80 or 60, or maybe some other headphones, ill read up recommendaqtions) meanwhile i wish to use it with the sony ex71 or my sennheiser hd270...wondering if anyone builds and sells portable amps here? Share this post Link to post Share on other sites
Rameish 0 Report post Posted July 29, 2004 If you're getting a clean signal from your headphone out and not one from your line out then you probably have a faulty unit. If you line out is variable (via the volume pot of your unit) then it's not a true line out as most PCDP output 0.6 to 0.7 volts (way lower than the volume out of the headphone socket). Share this post Link to post Share on other sites
Q00 0 Report post Posted July 29, 2004 Huffy, post a wtb(want-to-buy) in the classifieds and how much yer prepared to pay for one...that should do the trick Share this post Link to post Share on other sites
