Hooking up MARANTZ MODEL 15 without a PREAMP?

Thanks! Sounds awesome now with my Rogue Preamp! So different good!

Yes!

Audio Output

Analog Stereo RCA (Fixed or Variable)
Coaxial RCA

Look at the inputs at the top of the amp. RCA out of the Node into the RCA input of the amp. Control the volume with the bluos app:

"There are NO  INPUTS on the MARANTZ " - Yes there are on the back top, 2 RCA input jacks. DO NOT hook it up if the Bluenote has no volume control you will get full volume to your speakers and blow them.

Ok thanks 

Does the Bluesound have a variable output RCA's? Does the Bluenote have a volume control? It needs both for it to work. Do not hook it up if it doesn't.

There are left and right inputs on that amp. Look on the rear at the top!

There are NO  INPUTS on the MARANTZ 

Use the RCA outputs of the Bluesound into the Marantz inputs and it will work without any preamp needed!