Right thanks.It should, because you are just using the standard subwoofer pre-outs.
And during the measuments? The Zone 2 outputs need to be engaged then too, correct?
Right thanks.It should, because you are just using the standard subwoofer pre-outs.
Thank you for this suggestion. That will work fine for my friend.Could the X3700H technically drive passive subs, yes. If you hooked them up to the Height 2 binding posts, then looped the subwoofer RCA output into one of the analogue inputs such as CD, and selected that as your Zone 2 playback source.
Other than the power load increase is there anything else that is not recommended.However, that is a bit of a hack and not recommended. The power availability drops as more channels get loaded, and the X3700H only has typical class A/B output efficiency.
Right thanks.
And during the measuments? The Zone 2 outputs need to be engaged then too, correct?
Other than the power load increase is there anything else that is not recommended.
The same amplifiers are driving the LCR and the surround speakers, why would the unused pair will have a sound or reliability issues? The LCR amplifiers are driven much harder then the LFE channel.In theory the X3700H should handle the additional load, as long as the unit is properly cooled. I cannot vouch for long term reliability or sound quality, never heard of anybody else trying this.
What does that mean? Are you referring to the method suggested in post 37?Why bother connecting subs to channels […] you can't use bass management with?
I don't see how that would work. You would be sending the subwoofer power and signal from a speaker channel, and bass managed low-level signal from the preout at the same time?What does that mean? Are you referring to the method suggested in post 37?
Yeah, at the same time, because [2] feeds [1].You would be sending [1] the subwoofer power and signal from a speaker channel, and [2] bass managed low-level signal from the preout at the same time?
https://en.wikipedia.org/wiki/Clipping_(audio)2*70W for a sub sounds underpowered.
Um, NO. Or what do you mean by that? I misunderstand? Sensitivity varies tremendously with frequency. Richard Small's calculated value is frequency independent but has nothing to do with bass, and is only a theoretical value anyway.Sensitivity is a frequency independent value.
Well we have at least one proposed solution that is still to be refuted.[…] you can't do it.
Please read this post earlier in this thread.https://en.wikipedia.org/wiki/Clipping_(audio)
Yeah even in a car that is not enough for more than modest sound pressure. I designed a number of powered subs, and I remember one 150W model which visibly clipped on an oscilloscope. And per
https://www.aes.org/e-lib/online/browse.cfm?elib=5147
if you can't generate fairly loud sound pressure at the low frequencies, it is useless. Due to the nature of hearing (Fletcher-Munson) you just won't hear it.
Please read this post as well, which gave clear instruction on how to do it, and furthermore, I set it up as described and it is working!Back to the original question, I have not seen an AVR with main-ins, or channels assignable to the sub, so all this discussion is academic, you can't do it.
You missed nothing. I used that solution and it’s working. I wish people don’t assume what is in only their heads as reality. It doesn’t look good on them.
That is so cool!I used that solution and it’s working.
I checked the subwoofer outputs using a portable scope when the full system (5.1) blaring at full blast, measured around 95-96dBSPL C-weighted and saw no clipping. I expect the subwoofers to be producing more than 100dB at the time. That is enough for me as I expect for most people who care about their hearing.Can you do some compression tests? Would be interesting to see what you can get out of them with only AVR power and whether you run into any issues.
sigh, I guess I missed a few pages in the middle. I did not realize you could put an output to an input without feedack so that's pretty ingenious. But by now an admin should change the thread title to HOW to use unused channels to run a subwoofer.Not reading a thread or not understanding posts but giving concrete answers like "you can't do it" is not helpful.
Wait, what? If I put in 91.5 dB sensitivity, 2W, 3m, in corner, I get 91 dB. Not 100 dB. Did I do something wrong?According to this calculator the amplifier power required to produce 100dB is just 2W if the units are at a corner, which they are.