Idea for CD player "preamp"
wizzy
Posts: 867
I woke up today and was thinking about my preamp. I am looking at replacing my CD player (which has a volume control, an older Denon) with a CD player that doesn't have this.
So anyway, most CD players have plenty of power to drive the amp to clipping if plugged straight into the amp.
I'm laying in bed thinking about this earlier today.
Instead of using a pre-amp, why not just build a simple box that has a high quality potentiometer in it to adjust the level of the CD players output ??
Walla - no electronics, no power supply, no big long path of crap between the CD player and the amp.
Surely if someone would build something like this people would buy it.
So anyway, most CD players have plenty of power to drive the amp to clipping if plugged straight into the amp.
I'm laying in bed thinking about this earlier today.
Instead of using a pre-amp, why not just build a simple box that has a high quality potentiometer in it to adjust the level of the CD players output ??
Walla - no electronics, no power supply, no big long path of crap between the CD player and the amp.
Surely if someone would build something like this people would buy it.
Post edited by wizzy on
Comments
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Interesting idea. I don't know much about what you want to do so I will defer to some of the other members to say it is a good idea or not.Sunfire TGP, Sunfire Cinema Grand, Sunfire 300~2 (2), Sunfire True Sub (2),Carver ALS Platinum, Carver AL III, TFM-55, C-19, C-9, TX-8, SDA-490t, SDA-390t
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I woke up today and was thinking about my preamp. I am looking at replacing my CD player (which has a volume control, an older Denon) with a CD player that doesn't have this.
So anyway, most CD players have plenty of power to drive the amp to clipping if plugged straight into the amp.
I'm laying in bed thinking about this earlier today.
Instead of using a pre-amp, why not just build a simple box that has a high quality potentiometer in it to adjust the level of the CD players output ??
Walla - no electronics, no power supply, no big long path of crap between the CD player and the amp.
Surely if someone would build something like this people would buy it.
There are several. One of the best is the Pass Lab B1 buffer and I believe Promethius makes one, as well as half a dozen other companies make a passive line level controller.
My pre also runs in passive mode. The signal sees the input switch and the vol control and that's it when in passive.
Be careful not all systems (nor recrodings) like a completely passive controller. Components have to be choosen carefully.
http://www.enjoythemusic.com/magazine/equipment/0407/promitheus_audio_tvc_se.htm
http://www.enjoythemusic.com/magazine/equipment/0708/first_watt_b1_preamplifier.htm
H9
P.s. I love the advantage of my pre to run passive or active by the flip of a switch.......best of both worlds and I enjoy bothe settings equally depending on the recording."Appreciation of audio is a completely subjective human experience. Measurements can provide a measure of insight, but are no substitute for human judgment. Why are we looking to reduce a subjective experience to objective criteria anyway? The subtleties of music and audio reproduction are for those who appreciate it. Differentiation by numbers is for those who do not".--Nelson Pass Pass Labs XA25 | EE Avant Pre | EE Mini Max Supreme DAC | MIT Shotgun S1 | Puritan Audio PSM136 Pwr Condtioner & Classic PC's | Legend L600 | Roon Nucleus 1 w/LPS - Tubes add soul! -
They already exist. Here is the VPC3 Passive Controller from Channel Islands Audio.
http://www.ciaudio.com"Just because youre offended doesnt mean youre right." - Ricky Gervais
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"He who fights with monsters should look to it that he himself does not become a monster. And when you gaze long into an abyss the abyss also gazes into you." Friedrich Nietzsche
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Creek also makes a pretty nice little passive pre/volume control. The CIA one is also supposed to be a very good one.
IMHO sometimes a little colorization by the pre is not such a bad thing.DKG999
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Music System: Magnepan 1.6QR, SVS SB12+, ARC pre, Parasound HCA1500 vertically bi-amped, Jolida CDP, Pro-Ject RM5.1SE TT, Pro-Ject TubeBox SE phono pre, SBT, PS Audio DLIII DAC -
Ah ... well, I'll have to check those out.
I don't really understand why they call them "passive preamps" as they aren't preamping anything. The term passive controller (CIaudio) seems more proper. -
Since when is "preamp=before amp" so hard to understand?"He who fights with monsters should look to it that he himself does not become a monster. And when you gaze long into an abyss the abyss also gazes into you." Friedrich Nietzsche
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Since when is "preamp=before amp" so hard to understand?
Interesting, I always thought of it as signal pre-amplification ... the amplification of the signal occurring before the larger amplification of the signal in the amp. -
Like this?http://www.polkaudio.com/forums/showthread.php?t=84442why not just build a simple box that has a high quality potentiometer in it to adjust the level of the CD players output ??
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