Car CD Players; Do they output at "Line Level?" - AVS Forum | Home Theater Discussions And Reviews
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post #1 of 8 Old 02-10-2017, 09:49 AM - Thread Starter
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Car CD Players; Do they output at "Line Level?"

Hello;


I haven't found a CD player for home use that stores/plays 5 CD's and that is narrow enough to fit into a 12 inch wide space. I do not have room for a 5 CD turntable. I would like to solve this, and I'm ready to go to semi-extreme lengths.


There are modern car stereo systems that allow loading of 5 or 6 CD's and then sequential or random playback. What about using a car stereo as a home CD player? I could easily create a 12 VDC power supply. My question would be, is the output at a typical household level known as "Line Level?" I mean adequate for the usual RCA wires and jacks. LP players, for example, are much lower level output, so they have to be pre-amped just to get to line level output.


I would take the line level signal from the car CD player, and jack it into an amp that has RCA inputs. Even the Sonos Connect-Amp has 1 set of RCA inputs.


Anyone know if a car CD player is line level output?


Thanks, Tom.

There's a proper time and place for spontaneity, dammit!
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post #2 of 8 Old 02-25-2017, 08:14 PM
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Yes they are line level

Depending on which one you are looking at they usually range from 2v-5v
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post #3 of 8 Old 02-28-2017, 05:16 AM - Thread Starter
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NC25T;


Thanks for the feedback. I just want to make sure, does "Line Level" have an international standard, like for example, 2 volts? The range of 2 to 5 volts seems a bit large. My concern would be hitting the amp inputs with more power than they should see.


Cheers, Tom.

There's a proper time and place for spontaneity, dammit!
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post #4 of 8 Old 02-28-2017, 10:36 AM
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Quote:
Originally Posted by Tom Kay View Post
does "Line Level" have an international standard, like for example, 2 volts?
In the distant past line level meant about -10dBV or 1/3V. When CD came out the RBCD standard was 2Vrms for 0dBFS signals. That then became a defacto standard for a lot of gear and most CDPs. But as Sony/Phillips don't control the market anymore manufacturers can go their own way, hence the variation.

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My concern would be hitting the amp inputs with more power than they should see.
At line level, it's voltage not power. When you get the unit, measure the outout with a 0dBFS tone at 50 or 60Hz with even a cheap DVM and it will be accurate enough. If it's too high, then insert a voltage divider (2 x 5c resistors/ch) to drop it to where you need it.
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post #5 of 8 Old 02-28-2017, 11:55 AM - Thread Starter
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Thanks A9X-308;

I guess the next challenge would be to choose a car CD player/changer, and look inside to isolate which wires carry the "line level" signal to the amp section. This isn't a home audio unit, so there won't be any jacks out from the unit, intended to plug into an amp/receiver.

Cheers,

There's a proper time and place for spontaneity, dammit!
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post #6 of 8 Old 02-28-2017, 12:54 PM
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Thanks A9X-308;
A pleasure.

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I guess the next challenge would be to choose a car CD player/changer, and look inside to isolate which wires carry the "line level" signal to the amp section. This isn't a home audio unit, so there won't be any jacks out from the unit, intended to plug into an amp/receiver.

Cheers,
Why not choose one with pre-outs?
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post #7 of 8 Old 03-01-2017, 05:49 AM - Thread Starter
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All part of the learning curve. Didn't know such a beast existed.


Thanks again, Tom.

There's a proper time and place for spontaneity, dammit!
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post #8 of 8 Old 03-01-2017, 10:34 AM
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All part of the learning curve. Didn't know such a beast existed.


Thanks again, Tom.
They certainly do exist and have for a long time. They cater to those who want to use more powerful amps than the head units provide or to the rare user that will go active and use a line level xover and 1ch/driver to the speakers.
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