The Marantz Model 15 Amp

How fresh is the rebuild? Old solid-state gear will lose its smoothness when the caps dry out. Why bother with old gear, there is very good new stuff out there that will sound better. Rogue and Musical Fidelity come to mind. 

I have a Cary SLI-80 tuber. Sounds great. Just love the older Marantz stuff which keeps my Mancave cooler in the Summer. Cary in the Winter. Maybe I’ll send the 15 through my 2226 preamp? What do you think?

Oh. My preamp is a Bluesound Node. Excellent!

Nice amp.

After the dust settles and you’ve become nice and comfortable with the amp, you may consider upgrading the "captive" power cords with something better. I have a fair amount of handson experience wtih vintage Marantz, and your Heresy IVs will thank you for it.

This can be accomplish by purchasing a pair of complete cords, slipping off the connectors at the amp end, feeding them thru the chassis (might take a slghtly larger opening -- be sure to use a proper grommet!!) and soldering them in place. If you want better sound with an OEM appearance that can be converted back to stock, this is a fairly untechnical approach. If you are okay with modifing the back panel, you might consider, cutting out the sheet metal and installing EIC sockets, then use quality power cabling internally. This will allow you to change your power cables as you feel the need to do so. Whacking the chassis of older gear is always at the owner’s descretion. I can fully understand the sensitivities of you are hesitant to do this.

Thanks! 
I bought this unit off eBay with the wooden cabinet, and it said working so what risks are involved if I just hook it up turn it on and everything is playing? Do I really need to check the bias and what risks are involved if I don’t?