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More power for fronts-best way?
#308937 06/02/10 01:11 AM
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I have a Denon AVR-989 rated at 115 WPC, but I would like to play louder in two channel stereo. Any suggestions to get more power to my M60's?

Re: More power for fronts-best way?
1sweetspot #308944 06/02/10 01:41 AM
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1SS, the 989(2809)has a maximum power capacity that's more than what's needed for most situations, with peak SPL numbers a little over 105dB in typical listening positions. Have you measured the actual SPL numbers that you're getting, because the present capability should be extremely loud and more would be dangerous to hearing?


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Re: More power for fronts-best way?
JohnK #308945 06/02/10 01:54 AM
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You have pre-outs on that unit if you want more juice.


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Re: More power for fronts-best way?
Adrian #308949 06/02/10 02:55 AM
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Well, I haven't tested max db yet, but I know that at higher volumes, the sound seems a little strained, especially higher frequencies. I would like to get that volume without, I guess, straining the amp or nearing its max. I don't think it's the speakers to blame for what sounds like distortion.

To get reference levels of 76 db band limited pink noise using DVE, I have to turn it to +7.

So, I'm a little vague on the pre-outs. How would I connect another amp if I wanted to for 2 channel without affecting the settings for multi-channel?

Re: More power for fronts-best way?
1sweetspot #308956 06/02/10 04:25 AM
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 Originally Posted By: 1sweetspot
To get reference levels of 76 db band limited pink noise using DVE, I have to turn it to +7.


Maybe I'm crazy, but that seems way off to me. If the speaker levels are calibrated properly you shouldn't be anywhere near +7 in order to hit 76dB. Did you check speaker levels with SPL meter or run Audyssey? What are the speaker levels set to in the Denon?

Re: More power for fronts-best way?
#308959 06/02/10 04:42 AM
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Yeah, that doesn't sound right at all. I don't calibrate to 70dB any more, but on my 75wpc H/K, I was only at -15 or so (out of I dunno, +10?) for 70 on DVE. OTOH, the pink noise tests on DVE are WAY WAY WAY WAY WAY WAY quieter than the intro and test tracks. Like 20-30 dB quieter.

I need a new calibration DVD.


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Re: More power for fronts-best way?
Ken.C #308961 06/02/10 04:54 AM
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 Originally Posted By: kcarlile
OTOH, the pink noise tests on DVE are WAY WAY WAY WAY WAY WAY quieter than the intro and test tracks. Like 20-30 dB quieter.

I need a new calibration DVD.


Really? Maybe that's what he's experiencing then. On regular listening material he shouldn't be near +7 to hit 76dB though.

Re: More power for fronts-best way?
#308963 06/02/10 05:21 AM
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76dB should use about a tenth of a watt.


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Re: More power for fronts-best way?
JohnK #308964 06/02/10 05:26 AM
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No offense, John, but I'd love to hear from an audio engineer on that topic. Either that, or show me the math.


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Re: More power for fronts-best way?
Ken.C #308965 06/02/10 05:49 AM
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Ken, the anechoic sensitivity rating on the M60s is 89dB per 1 watt at 1 meter. Taking into account both direct sound and room reflections, sound level in typical rooms at home drops off at about 3dB per doubling of distance(e.g.,Toole, p.60). At a typical listening distance of around 10' the sound level for 1 watt would be about 85dB. 10dB lower would use a tenth of a watt(95dB would use 10 watts, 105dB would use 100 watts).


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