Review on Edifier R1280Ts Powered Bookshelf Speakers: 🔊 Superior Studio Monitor Speakers with Subwoofer Line Out by Jessica Velasquez

I use them as near field monitors in my makeshift studio. The sound quality is great, especially for the price (which is why I bought another set). However, as others have said, the subwoofer output is "strange". I assumed it was a subwoofer output, so mono. So I bought a 3.5mm RCA mono cable and plugged it into the line in of a Yamaha subwoofer. Nothing. Nobody else seems to have mentioned "mono" and the manual only says "3.5mm", so I tried a 3.5mm stereo to RCA cable. I tried connecting the left channel first and then the right channel to the line input of my subwoofer. Nothing and nothing. I began to wonder if the exit was even alive. Then I read the reviews here where I found out that this is basically a full range headphone output that doesn't turn off the speakers when in use. So I plugged in my headphones and listened to music. Good. I then tried using the subwoofer's speaker level inputs, which are fed from a line going left from the Edifier right speaker, and it worked. However, it defeats the purpose of a separate subwoofer output if I still have to use the speaker level inputs on my subwoofer. So my advice, skip the extra cost of a T and just go with the T model. Updated 12-Feb-21 : I tried another solution to connect a subwoofer to my subwoofer's line-in, namely TRS Stereo Male to Mono Cinch Female Adapter Jack which I bought here at Revain and it worked! The description of this adapter states that it performs a "summation" of the left and right channels. Since this is a passive connector, I highly doubt it. As one reviewer of the same adapter noted, it simply "shorts" the tip and ring of the left and right channels. The result is the highest level between left and right, not the sum. I didn't try this solution at first because I didn't like the idea of "shorting" the two channels, but it doesn't seem to have a detrimental effect on the Edifier speakers. The left and right channels probably use transformer isolation to protect the amp, but I'm considering it. The bottom line is that it works well. I've upgraded my rating to 5 stars but they should put it in the manual somewhere to save people the "pain" I went through.