These companies that make subwoofers, should use amps that are more versatile. Not everyone has a receiver with a subwoofer output. I've seen cheap under $200 subwoofers, with left and right line level inputs, and left and right speaker level inputs in the past. They could have the company that makes their amps (if they don't) supply this type of inputs. I think the speaker level inputs have a high enough input impedance, that the system may not know it's hooked up.
I have an older HSU, beside getting good reviews, it performed as promised. It went down close to the frequency specified,when tested. I don't know about their (HSU) newer ones made nowadays to say anything on promised specs. A lot of other companies promised to go down to a certain frequency, but fell about a full octave short. One was a JBL (I believe) that fell short by about 10 decibels (at -3 db, or -6 db) when tested. That's about an octave less than promised. I only use mine on occasion, to see if I'm missing anything on some new recordings I buy.
There doesn't seem to be many tests done on subwoofers. This lower priced HSU subwoofer has the type of inputs, that makes it easier to hookup. No specs for impedance that I can find though. This variation of hookup options, is a good selling feature in my opinion. It would be nice if the companies read these type of forums, and give their customers a product they could work with, a lot easier. It sure wouldn't hurt for some of these companies, to get more informed. Also, it wouldn't cost them much at all, for them to give these types of inputs, in my opinion.
I have an older HSU, beside getting good reviews, it performed as promised. It went down close to the frequency specified,when tested. I don't know about their (HSU) newer ones made nowadays to say anything on promised specs. A lot of other companies promised to go down to a certain frequency, but fell about a full octave short. One was a JBL (I believe) that fell short by about 10 decibels (at -3 db, or -6 db) when tested. That's about an octave less than promised. I only use mine on occasion, to see if I'm missing anything on some new recordings I buy.
There doesn't seem to be many tests done on subwoofers. This lower priced HSU subwoofer has the type of inputs, that makes it easier to hookup. No specs for impedance that I can find though. This variation of hookup options, is a good selling feature in my opinion. It would be nice if the companies read these type of forums, and give their customers a product they could work with, a lot easier. It sure wouldn't hurt for some of these companies, to get more informed. Also, it wouldn't cost them much at all, for them to give these types of inputs, in my opinion.