Question about Audio Players & Recorders
An EQ (equalizer) is generally connected between the low level output of a device (phono, CD, DVD, etc.,) and the amplifier's input. If you choose to place the EQ at this point, only the device connected will be equalized. All the other sources will be unaltered.
A more complete way is as follows:
Some amplifiers have a jacks labeled Left & Right "PRE OUT" and Left & Right "AMP IN" with a heavy gauge wire or strap that connects the left AMP IN & left PRE OUT together; and the right AMP IN and right PRE OUT together. Removal of the wire or strap will cause the amp to fall silent, as the low level signal no longer has a path from the PRE OUT to the AMP IN jacks. If you were to insert the EQ here, the path would be restored - but allowing you to boost or cut the level of certain frequencies BEFORE they are amplified. This is accomplished by connecting PRE OUT to EQ IN and EQ OUT to AMP IN for both the left and right channels.
As I mentioned, only some amps have these PRE OUT and AMP IN jacks - many however do not. In this case, you may be able to use the TAPE MON jacks. The TAPE MON is the Tape Monitor and appears on most "half-way decent" receivers. These jacks were provided to enable listening to a tape in nearly "real time" as it was being recorded on higher end "3 head" tape recorders. If you don't have a "3 head" tape deck (most do not), you can use these jacks the same as the PRE OUT and AMP IN jacks above. This is accomplished by connecting the TAPE OUT to EQ IN and the EQ OUT to the TAPE IN for both the left and right jacks. You would then select the source of the music - be it CD, Phono, etc. and with the EQ powered, pressing the TAPE MON button on the receiver, you could hear the difference between the EQ in the circuit and the EQ out of the circuit.
The key in the examples above is that there is always an input connected to an output. Don't connect inputs to inputs and outputs to outputs. Take your time and work one cable at a time - one end to an input and the other to the corresponding output.
Some situations may arise if using Dolby Digital, THX, etc. type input signals. Sometimes it is not possible to equalize them. If you have sources (DVD, Satellite Receivers, etc.) that have an optical or coaxial connection, those will be the ones that may have undesired affects. The familiar RCA type jacks for left and right signals should work perfectly.
I'll see if I can find a link with a picture...
Posted on Sep 29, 2009
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Posted on Jan 02, 2017
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