| Title: | Welcome to the CD Notes Conference |
| Notice: | Welcome to COOKIE |
| Moderator: | COOKIE::ROLLOW |
| Created: | Mon Feb 17 1986 |
| Last Modified: | Fri Mar 03 1989 |
| Last Successful Update: | Fri Jun 06 1997 |
| Number of topics: | 1517 |
| Total number of notes: | 13349 |
Are there any differences between the line-out jack and the headphone
jack of CD players, electrically speaking, aside from the fact that
the headphone jack (usually) has a volume control? I'm asking because
I'm wondering if it is possible to connect a portable player directly
to an amplifier using the player's variable output headphone jack.
I know that it is *physically* possible (at least on my Sony D4),
I'm concerned with electrically matching up. Thanks!
Ken....
| T.R | Title | User | Personal Name | Date | Lines |
|---|---|---|---|---|---|
| 1359.1 | if you mean impedance matching... | STAR::BIGELOW | Bruce Bigelow, DECnet-VAX | Tue Oct 25 1988 12:43 | 22 |
The "line out" jack usually expects a high impedance load. I think
this is usually around 10K ohms and up.
The headphone jack usually expects low impedance, like around 8
ohms.
No actual damage should result to a properly designed player if
you use the headphone jack into a high impedance load, but I would
not put "line out" into a low impedance load - this could look too
much like a short circuit, and just might result in some damage.
Of course, either output should work best when it sees the right
impedance range for a load.
FYI, I believe that those adapters that look like a cassette which
people use to play protable CD players through their car stereos are
supposed to plug into the headphone jack. They are designed to present
a relatively low impedance load, and they work best with the car stereo
at a relatively high volume and the CD player at a relatively low
volume, since this tends to reduce the dynamic range to something that
a car stereo (and car speakers) can handle.
B
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| 1359.2 | Try It You'll Like It | RHODES::BOYD | Sat Jan 07 1989 23:28 | 6 | |
I have the Sony D-4 and use a Rectron cassette adapter for my
car stereo. Sounds great and it is also a great way to let a friend
c**y your CDs if he has a portable with double cassettes.
db
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