Onkyo TX-NR 646 clipping?

[audiohead]

what volume number could this sucker clip at with some heavy tool from say Pandura signal? 100WPC
I would love to bump to Anthem next but for now it will be getting a center DUO next, by fall is the plan.
this will help me pick an Anthem power level i think?

i have my max volume setting at 65 ,40 is kinda quiet and normal listening without the AC running! 50-55 for home theater when it is and stereo with music optimizer on and microphone set up i think the right way. never been past that. don't even know what it maxes at for sure, i thought a saw somewhere at 80? but it is just a number and i realize that.

wired ethernet from router to stereo and tv. HDMI to tv from monitor out not ARC crap i don't understand yet!

make sense? feel free to ask questions and straighten my old school out and up to date.

[racrawford65]

do you have an sound pressure meter (even a phone app one).
I'd measure at your typical volume settings.
Not sure how the volume scale on the Onkyo runs. Sounds like 0 to xx, where 0 is no volume (so possibly an absolute scale).

Anthem MRX has a relative scale. Runs from +10 to -90 I think. I'm typically around -30 or -35 for music and its reasonably loud. Running a 100WPC Atlas Magnum for my fronts. If you are planning to use onboard amps of the Anthem, the 1120 and 720 are same wpc (140 for channels 1-5, 60 - i think - for the additional) 1120 = 11 amplifier channels, 720 = 7. The 520 is 100 wpc., These are at 8 ohms and 2 channel driven. If you want/need/will want Dolby Atmos, need to go with either the 1120 or 720. If only 5.1 or less, 520 should be fine for your listening habits described above. Can always add an outboard amp.

[curtis]

I am going to add one confusing fact, amplifier WPC ratings on receivers tend to be overstated...sometimes by a huge amount. There are no real regulations in place on how and manufacturer can state output, and some are more honest than others.

[Pogre]

I wouldn't use this as the gold standard, and keep in mind it assumes 8 ohm speakers (I subtract 3 dB sensitivity for 4 ohm speakers), but it can give you a rough idea of the power required to hit desired spl at your seat. Just fill in the boxes and click calculate.

http://myhometheater.homestead.com/splcalculator.html

[racrawford65]

Curtis is absolutely spot-on in his comment about manufacturers stretching the truth, some much more so than others.

[racrawford65]

I wouldn't use this as the gold standard, and keep in mind it assumes 8 ohm speakers (I subtract 3 dB sensitivity for 4 ohm speakers), but it can give you a rough idea of the power required to hit desired spl at your seat. Just fill in the boxes and click calculate.

http://myhometheater.homestead.com/splcalculator.html

nice calculator... I can do roughly 110 db but don't think I'll try...at least until next time Ace of Spades is on the TT.

[Pogre]

Curtis is absolutely spot-on in his comment about manufacturers stretching the truth, some much more so than others.

Yes, unfortunately there isn't much of a standard and another trend lately seems to be burying useful specs by including a bunch of useless specs for 1 channel driven, 6 ohm, with 1 kHz, etc. To me the 2 channel driven at full bandwidth spec is what matters most, but finding it can be a chore.

[Pogre]

nice calculator... I can do roughly 110 db but don't think I'll try...at least until next time Ace of Spades is on the TT.

I wouldn't count on hitting 110 dB or try to tho!

That's just gonna give you a rough estimate. It's not a perfect calculator as it doesn't allow for different impedances and uses 1 watt/meter instead of 2.83 V. Like I said, I cheat it a little by subtracting 3 dB from sensitivity for 4 ohm speakers. I usually click "away from walls" too, just to be safe.

[racrawford65]

not planning on it..just kidding. I value what's left of my hearing :)

[Qman]

An amplifier's job is to multiply the signal provided to it by the gain factor set by the volume control. You simply cannot say that one setting will yield no clipping and another will. The amplifier will *try* to amplify the input signal, no matter what it is, within some established range. An amplifier will clip based on the current drawn and the voltage limits at the power supply. The current drawn will depend on the load (speaker) Every speaker is different and will present a different load. You just have to listen for clipping, and back off for some headroom. That said, Pandora will be fairly compressed source.

[audiohead]

I wouldn't use this as the gold standard, and keep in mind it assumes 8 ohm speakers (I subtract 3 dB sensitivity for 4 ohm speakers), but it can give you a rough idea of the power required to hit desired spl at your seat. Just fill in the boxes and click calculate.

http://myhometheater.homestead.com/splcalculator.html

i cant upload a pic again?

inputs:
92db tower sensitivity
100 WPC
2 channel 2-4ft from wall + 106.7 ??? fine with me if that is true?

i screen shot my phone app SPL meter and Never get over 80db BUT it really is pretty loud and clean. I am certain i can hear if i am over driving them and it seems just fine?

calculating 106.7 and reading 80 is way off

[audiohead]

Agreed, plenty loud w/ good clean power. Although, I think audiohead was saying 80 db was loud enough for him... (well, it it's too loud, you're too old... JK). I, too, tend to listen at more sane volumes now-a-days unlike my youth...

ill pull this over here. lol, not too loud but do feel old lol

to clarify the 80db is the reading on my phone SPL meter! cant be near accurate with calculated at 106.7db.

when i stand in my listening position i am believing the 106!

[audiohead]

i just thought of one more thing, My Rythmic LV12F is on and adding another 300W into the sound!

don't make sense to me?

[racrawford65]

where are you crossing the mains to sub at, 80 HZ? that takes alot of work off the main speakers in to produce bass, which should help your amp drive the mains.

Does your AVR have a test tone? If so, play that and check what your phone SPL measures... it should be around 75 db more or less. If far off, tells you how accurate that mic is.

If you have a USB mic, you can always download REW (free) -- it has a built in SPL meter that works really well.

[audiohead]

where are you crossing the mains to sub at, 80 HZ? that takes alot of work off the main speakers in to produce bass, which should help your amp drive the mains.

Does your AVR have a test tone? If so, play that and check what your phone SPL measures... it should be around 75 db more or less. If far off, tells you how accurate that mic is.

If you have a USB mic, you can always download REW (free) -- it has a built in SPL meter that works really well.

80HZ crossover, yes

ah, yes on the test tone set up, i will do that! and look for 75DB thank you

no usb mike i don't think but an earphone plug mic, i do will that do?

i need a day or 2 as i am giving my buddy some help at the farm , on way soon

[racrawford65]

I'm not sure if an earphone plug mic will work with REW. I guess you can always try.

If your AVR has room correction, the mic it came with may work as assuming it would be USB.

You could always pick up a UMIK-1 from Amazon or other source. Not that expensive (around 100) but is a good tool to have.

[audiohead]

AVR mic is the one with the earphone end

[davef]

i cant upload a pic again?

inputs:
92db tower sensitivity
100 WPC
2 channel 2-4ft from wall + 106.7 ??? fine with me if that is true?

i screen shot my phone app SPL meter and Never get over 80db BUT it really is pretty loud and clean. I am certain i can hear if i am over driving them and it seems just fine?

calculating 106.7 and reading 80 is way off

Phone SPL apps are not accurate.

[Pogre]

ill pull this over here. lol, not too loud but do feel old lol

to clarify the 80db is the reading on my phone SPL meter! cant be near accurate with calculated at 106.7db.

when i stand in my listening position i am believing the 106!

I feel partly responsible for the spl conversation...

If you're turning it up that loud you might be right at the hairy edge of clipping and a dynamic peak could cause you some problems. You don't always hear clipping when it happens either. Be careful man. I'd hate to see a new thread lamenting the loss of a tweeter!

[audiohead]

bumped the max volume to 62 from 65...i still felt safe at 65 but HEY?

hense the q?

i always loved Onkyo power , am i missing something?

dont worry , you wont hurt my feelings lol!

it does dang near 2x its pwr into 4 ohm

i dont feel it is under rated?