Running 222 through an external sound system

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I want my 222 to run through my home sound system. I love the functionality of experience of the jukebox but don't want to sacrifice a lot of sound. I've got a vintage Marantz and two sets of speakers in two rooms and records on my turntable sound fantastic. So for my 222, I bought a line level to RCA converter and wired it into the CV speaker terminals and ran an RCA to the Tape 1 input of my Marantz. I also disconnected the jukebox speakers. It doesn't sound great. There's a lot of distortion and the left channel cuts out a bit. It could be the line level convertor. Could also be the 50ft RCA cable (my 222 is on the other side of the room from my stereo cabinet). But my feeling is that it's more the 222 amp than anything else. The 222 amp's been restored and has all new tubes, but even using the internal speakers, the sound lacks a lot of definition and clarity despite playing with tone control. 

So my question is, has anyone ever had luck tapping into the signal from the needle or mute plug? I'd love to grab that signal and run it through a decent preamp and then out to my Marantz. Is there an adapter from the mute plug to RCA? Any other ideas? 

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For anyone interested, I did successfully wire my 222 into my home sound system. I used this line level to RCA converter (https://www.amazon.com/dp/B00009UHRE?psc=1&ref=ppx_yo2ov_dt_b_product_details) and went out of the CV speakers. I just guessed on the polarity with the wires and it worked out. Then I ran the RCA to the Tape 1 input of my Marantz (aux was already in use). It's already amplified by the jukebox's tube amp so didn't need anything additionally going into my receiver. I wasn't sure if there was a switch to turn off the jukebox's internal speakers so I just pulled a one wire from the terminal of each speaker driver. It's easy to pop back in if I ever want to use the internal speakers again. Lastly, on the tube amp, I turned the bass all the way down and the treble all the way up. It gave it some more definition and kept things from getting to muddy in my sound system. It works great, only cost about $10, and took less than 20 minutes to set up.

[armandh]

the best place to get signal is at the top end of the volume control
IMHO
YMMV