luvdunhill Posted December 9, 2009 Report Posted December 9, 2009 Justin, what's the gain of the Slim? I see that you mention maximum 4.2V @ 250mA, but heck if I know what normal output levels are for a DAP...
NoValidTitle Posted December 9, 2009 Report Posted December 9, 2009 Grats Justin, seems like they are going FAST.
justin Posted December 9, 2009 Report Posted December 9, 2009 Justin, what's the gain of the Slim? I see that you mention maximum 4.2V @ 250mA, but heck if I know what normal output levels are for a DAP... Gain varies as you turn the knob. I can set it at a max of about 5x
luvdunhill Posted December 9, 2009 Report Posted December 9, 2009 Gain varies as you turn the knob. I can set it at a max of about 5x so, most people will set the gain of the iPhone to max (I don't even know, is there a line-out for the iPhone?), what is that voltage approximately?
justin Posted December 9, 2009 Report Posted December 9, 2009 so, most people will set the gain of the iPhone to max (I don't even know, is there a line-out for the iPhone?), what is that voltage approximately? I'm not exactly sure, I would think around 1Vrms
Dusty Chalk Posted December 9, 2009 Report Posted December 9, 2009 ...is there a line-out for the iPhone?It's the same connector as the iPod, so yes; but there are other issues (the software on the iPhone has a way of determining if the connector is iPhone compatible or not and complains, but I believe otherwise works).
luvdunhill Posted December 9, 2009 Report Posted December 9, 2009 I'm not exactly sure, I would think around 1Vrms Sounds reasonable. I'd guess about 1.5Vrms. I'm assuming the battery is 3.7v and a Wolfson chip...
VPI Posted December 9, 2009 Report Posted December 9, 2009 That reminds me, I need to find a LOD for my Touch. Anyone have a good source besides ALO?
veloaudio Posted December 9, 2009 Report Posted December 9, 2009 It's the same connector as the iPod, so yes; but there are other issues (the software on the iPhone has a way of determining if the connector is iPhone compatible or not and complains, but I believe otherwise works). The iPhone needs a resistor (I don't know the value) between two pins on the connector or it prompts you to put it in "Airplane mode" when you plug the LOD in. The LOD will still work without it but the prompt is anoying. I had a guy over at HF make me a LOD with the resistor inside the plastic dock connector and it works great. I'll need a shorter one (or shorten the one I have) for use with the Slim though.
blessingx Posted December 9, 2009 Report Posted December 9, 2009 That reminds me, I need to find a LOD for my Touch. Anyone have a good source besides ALO?I use the Apple dock when at the desk and the below when out. iBasso adapter And yes, you get the 'compatible' warning, but works fine.
justin Posted December 9, 2009 Report Posted December 9, 2009 Whiplash Audio has reasonably priced ones, so does Qables
HeadphoneAddict Posted December 9, 2009 Report Posted December 9, 2009 www.thecablepro.com has a new Earcandy 90 degree LOD for about $59 that works with iPhone (but I don't think it uses a resistor to disable the "not made for" message). I have one on the way and report on it soon. I met Ted The owner at RMAF, and my son and I dined with him, and he's a nice guy. I also like my CablePro Panorama 1/8" extension cable Ted made. I was also planning on getting one from Justin if he decides to make them later.
K3cT Posted December 10, 2009 Report Posted December 10, 2009 Maybe if I beg hard enough, my parents would help to partially fund this thing for my Christmas present. The timing couldn't be right enough, just right after I blew my bank account for Gamma2, Sigma25 and Sigma11 parts.
STEAXAUCE Posted December 10, 2009 Report Posted December 10, 2009 For the people discussing LODs, you might be interested to know that according to several people who've posted measurements, the newer iPods' headphone output measures better with no load than its line out. I'm talking about the 2G-and-later Touches and the Classic. So you're getting better measured performance from the headphone out via a simple mini-to-mini than you you are using a LOD. I'll try to find the pages to post here. I think I found them the first time through links from anythingbutipod. Note that I didn't say that the headphone output sounds better than the lineout, only that it measures better. Personally, I'd guess that they'd be nearly indistinguishable, but if one did sound better I'd expect it to be the headphone out. I'm a big fan of DBT as the only way to substantiate claims about sound quality. Measurements don't prove anything. Anyone with an iPod and LOD want to try some double blind tests?
Beefy Posted December 10, 2009 Report Posted December 10, 2009 For the people discussing LODs, you might be interested to know that according to several people who've posted measurements, the newer iPods' headphone output measures better with no load than its line out. Depends what is meant by 'no load'. The situation might be very different feeding different input impedances.
STEAXAUCE Posted December 11, 2009 Report Posted December 11, 2009 I guess we can find out the impedance of the lack-of-load used when I find the web pages I referred to, but the outputs were connected directly to the input of the soundcard. The iPod headphone out actually measures very well when it's not driving headphones, as you can see at the web page below: http://img21.imageshack.us/img21/8151/imgp7447.jpg The lineout measures pretty well too, just not as well as the headphone out. I'll let you know when I find those web pages comparing the two.
Beefy Posted December 11, 2009 Report Posted December 11, 2009 I guess we can find out the impedance of the lack-of-load used when I find the web pages I referred to, but the outputs were connected directly to the input of the soundcard. Well the input impedance of PC soundcards can be as low as 1500 ohms according to one reference I found. You can't expect a line level output to drive that effectively, particularly if it has output coupling capacitors. So the headphone output will certainly give a better result into that sort of load. But increase the input impedance up to levels of typical amps, which is 10kohms and higher, the line level will start performing much better.
STEAXAUCE Posted December 11, 2009 Report Posted December 11, 2009 It appears that I posted the WRONG link last night. The correct link, to a page with unloaded measurement data for the headphone outputs of the iPod Touch, Classic and Microsoft Zune, is below: AnandTech: iPod vs. Zune: January 2008 High End MP3 Player Roundup
oogabooga Posted December 14, 2009 Report Posted December 14, 2009 CablePro Cable, Connectors, and Accessories instantly upgrade your audio video system has a new Earcandy 90 degree LOD for about $59 that works with iPhone ... Hey Larry, the only ones I could find there were $119 and up (The Earcandy Lite right angle iPod Dock is flexible, durable, and beautifully musical.) - do you have a link for the one you mention? Thanks, Sameer
HeadphoneAddict Posted December 15, 2009 Report Posted December 15, 2009 Hey Larry, the only ones I could find there were $119 and up (The Earcandy Lite right angle iPod Dock is flexible, durable, and beautifully musical.) - do you have a link for the one you mention? Thanks, Sameer Sorry, I must have misread it or I'm going nuts - either could be a possibility.
The Monkey Posted December 19, 2009 Report Posted December 19, 2009 Justin, I pm'd you 7 minutes ago about the purple balanced version with DAC and it hasn't arrived yet.
Fitz Posted December 19, 2009 Report Posted December 19, 2009 I'm planning to order one tomorrow, how come I don't have a tracking number yet?!
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