"Greg Wormald" wrote in message
...
In article ,
Audio Empire wrote:
On Tue, 25 Oct 2011 09:22:54 -0700, bob wrote
(in article ):
On Oct 25, 10:35=A0am, Rich Teer wrote:
2. Connect your iPod to an external DAC using a digital connection.
The iPod's internal DAC is a piece of crap, so bypassing it is a must
for decent sound quality. =A0
I think I'd prefer to trust an editor who's actually measured said
piece of crap:
http://www.stereophile.com/content/a...layer-measure=
ments
Money quote:
"The iPod's measured behavior is better than many CD players"
There may be other issues related to using an iPod as a source
component, but the DAC is not one of them.
bob
This tallies with my listening experiences, for sure.
I did however notice a considerable improvement when I bypassed the
amplifier in my iPhone and started using a "line out" from the bottom
connector.
The line out no doubt provides a far higher source impedance than the
headphone out.
What you are perceiving as a considerable improvement is, for better or
worse, a signal with far rougher frequency response as the input to your
headphones than is present at the headphone jacks. Since headphones tend to
have peaked up impedance curves particularly at the bass end, you are
probably enjoying some bass boost.
http://www.avguide.com/blog/why-head...pedance-issues
Shows a real world example of this.