Line Out - Line In - Line Out - Line In - Line Out

What is tape loop?
I noticed that phone stage of amplifier has a line out too.
It is called PHONO OUT. May be I should use it to send a signal to equalizer? And output of equalizer back to AUX of amp?

Look on the back of your preamp to see if it has tape-in and tape-out connections. But instead of putting a tape deck there, substitute your equalizer. Then select the tape monitor on the front of the preamp to listen to the signal passed through your equalizer.

It looks like the amp doesn't have Tape-In and Tape-Out connectors. At least there are no connectors named like this. But it has Line-Out connector. Which delivers a signal out. And this signal is not controlled by volume knob. I am sure I can use this Line-Out connector to connect a tape recorder. So may be it is subsitute for Tape-In? It also has Phono-Out connector. Which is probably output connector of build-in Phone Stage.
I am confused. There are less than dozen connectors on a rear panel and I can't figure out how to use them properly! Strangely but the user manual does nothing describing them.
Not too bad for $3000 dollars device!

If your preamp lacks the capability to monitor a recording while it is being made, then you may safely forget the tape loop idea.

I called DK Design last week. They told me that it is possible to connect an equalizer to the amp. But since this phone conversation happened before I had an equalizer delivered I didn't ask for details on how to do it.
Now I need the cables to order (one end should be RCA, another Balanced) and I am curios if I should proceed (if I find the way to connect it) or to return EQ back to the store.
While we are on this topic... I read user manual of this Behringer DEQ2496 equalizer. Neat device indeed. But there is "but"...since it is all digital it must first convert an analog signal it gets from (in my case) from turntable into digital. After it DIGITALLY makes some adjustments to the sound it converts it back to analog. According to user manual it does the conversion at 96 kHz sampling rate. I wonder if the sound noticeably degrades from such analog-to-digital and digital-to-analog conversion at this 96 kHz sampling rate. It worth to mention that CD audio quality is 44.1 kHz. And with 44.1 I can definitely hear the difference between CD and analog (vinyl). Well...96 kHz is more than twice higher rate... but still...it is SAMPLING. And every SAMPLING is DEGRADATION.
I wonder how much noticeable to human ear this degradation/loss of quality is.