View Full Version : Why is 3.5mm audio quieter than phono?

06-20-2007, 01:30 AM

Joe Redifer
06-20-2007, 05:04 AM
It's not quieter by nature, just the way the particular jack is pre-amped (is there a volume control somewhere that's turned down?)

06-20-2007, 12:25 PM
line out is meant to go directly into an audio amplifier.. regular volume controlled output usually uses an op amp or something similar to pre-amp it for your headphones (which in theory is dangerous for your audio amplifier to use)

EDIT: Oh, and line out can be used for those CD to Tape adapters :p

06-20-2007, 01:13 PM
not all sound equipment are the same...

but generally, line level will ALWAYS be quieter than a pre-amped output..

06-21-2007, 03:05 PM
then i don't know.. resistance on the wires?

it's probably for compatibility with audio cassette adapters for use in the car..

06-21-2007, 03:16 PM
lol, Sega has the weirdest ideas.

Who in reality would use a CDX with a cassette adaptor?
it's a portable CD player standard. most portable CD players have 3.5mm line outs for those adapters...

Joe Redifer
06-21-2007, 04:23 PM
I never noticed a volume discrepancy between the different jack types, so it's not accurate to say that "all" RCA-type connectors are louder than "all" 3.5mm jacks.

Joe Redifer
06-21-2007, 06:02 PM
It's not stupid. I love questions that most people wouldn't think to ask.

06-21-2007, 07:12 PM
But A Portable CD Player has volume, so it's not outputting at line.

And Joe, I guess that's true. It's just that in my experience, devices that output in 3.5mm are always quieter unless they have a volume control.

Meh, I guess this thread is stupid. Sorry.
a portable CD player usually has TWO outputs.. a pre-amped jack, and a line level jack.. some don't though... a CD players line-out jack is usually desiged for car adapters..

06-22-2007, 12:17 PM

I've never seen a portable CD player with two outputs. Are you talking about old ones or modern ones?

old ones usually had them all the time.. i've still seen some modern ones contain dual outputs...