My TX-8020 will be three years old next month and it still functions flawlessly. It has a clearly labelled line level L+R 'SUB' output to the left of the two sets of speaker outputs. It only outputs when Speaker A is chosen. If you have one set of speakers, you can use speaker B - and control the sub's on/off by also selecting A, although the remote won't select speakers. It's distortion is slightly lower than either the 8140 or 8160 models - and rated with both channels driven. Although 'only' 50 Watts rms (both channels driven) at 8 Ohms, it can be set for 4 Ohm outputs via the remote. It also can be connected to my C-7030 CDP and control it, too. It's AM tuner works about as well as is typical for the lot these days, while it's FM tuner has better quieting than anything short of my long gone Lafayette Radio dedicated tuner, which was legendary. It also has a MM low level phono input and ground terminal, which I have never used. It's a steal for $149 from Amazon! Heck, so is the Onkyo C-7030 CDP (I have two of them!), even though it's $.99 more.
Mine originally drove Infinity P163's (Ho hum...), by 12/14 it drove NHT S1 2.1's, by 11/15 Klipsch RB-81ii's (Wow!), by 9/16 Heresy's (WOW!). It is now connected to the NHT S1 2.1's, despite their relatively low sensitivity and now in a larger room, it is plenty of power for my needs.
Last edited by Stainz; 07-25-2017 at 09:24 AM.