 Re: Double Blind Test
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Joined: Oct 2006
Posts: 6,955
axiomite
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axiomite
Joined: Oct 2006
Posts: 6,955 |
But I didn't buy my amp to listen to music at 90 dbs.
Here is a good book I recommend for you. Sign Language Made Simple  Just kidding. Well, at least I hope this never becomes more than a joke.
With great power comes Awesome irresponsibility.
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Re: Double Blind Test
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Joined: Jul 2004
Posts: 4,444 Likes: 16
connoisseur
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OP
connoisseur
Joined: Jul 2004
Posts: 4,444 Likes: 16 |
The Whole Mitrix Hi Fi web sight has some interesting reading material, but this is the first time I can recall ever seeing a blind test set up like this.
I think it would be pretty fun to participate in one.
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Re: Double Blind Test
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Joined: Dec 2008
Posts: 1,361
connoisseur
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connoisseur
Joined: Dec 2008
Posts: 1,361 |
But, these tests don't address the battle that has been raging on boards such as this one for years... is it worth getting an external amp to power your speakers, or does a power receiver do the exact same job? These tests don't deviate from a specific decible level. And they don't test out the upper reaches of the volume levels. In the past 4 days I've experimented with the Emotiva vs my Denon and found the Emotiva to run my speakers better.... at higher volumes. If I capped the volume levels at around 90 dbs or so, then I am pretty certain I would not notice any percievable differences.
But I didn't buy my amp to listen to music at 90 dbs.
That is exactly what I've found. I was shocked to see that I could not tell Blu-Ray v. CD on Dave Matthews at RCMC, but I couldn't. But I can tell the difference between my Denon AVR 3300 and my separate amp at reference level - i.e., levels designed to reproduce the sound made live. Heck, I can even pick out which of the three fronts in hooked to the Denon in 5 ch music listening based on the harshness of some sounds on peaks. And I still have not heard anyone explain how a subwoofer could sound great at 50hz working with the 10 or 20 watts the formula says should should drive it to 100db. Where is this mythical beast? I'd love a $100 sub that can reproduce a bass drum's kick accurately.
Panny 3000 PJ, 118" Carada, Denon 3300, PS3, Axiom QS8, PSB 5T, B&W sub, levitating speaker wire
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Re: Double Blind Test
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Joined: Dec 2007
Posts: 7,786
axiomite
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axiomite
Joined: Dec 2007
Posts: 7,786 |
And I still have not heard anyone explain how a subwoofer could sound great at 50hz working with the 10 or 20 watts the formula says should should drive it to 100db. Physics.
Fred
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Blujays1: Spending Fred's money one bottle at a time, no two... Oh crap!
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Re: Double Blind Test
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Joined: Aug 2007
Posts: 3,488 Likes: 9
connoisseur
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connoisseur
Joined: Aug 2007
Posts: 3,488 Likes: 9 |
See Mojo's signature
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Re: Double Blind Test
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Joined: Dec 2007
Posts: 7,786
axiomite
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axiomite
Joined: Dec 2007
Posts: 7,786 |
 If you are playing music, which is where I think the calculator came from, you are probably fine with a low power small sub. Most music dosn't go lower than 40Hz, so you could buy a sub with a highly efficient driver like those used in pro subs. Earl Geddes has no trouble getting 120db (with headroom) out of his mid bass drivers with a 100w amp. The drivers are rated at 105db if I remember correctly. Even his ULF sub (-3db of 20Hz) is not driven with a particularly powerful driver. It all depends on your objectives and choice of drivers.
Fred
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Blujays1: Spending Fred's money one bottle at a time, no two... Oh crap!
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Re: Double Blind Test
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Joined: Jun 2003
Posts: 8,488
axiomite
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axiomite
Joined: Jun 2003
Posts: 8,488 |
bibere usque ad hilaritatem
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Re: Double Blind Test
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Joined: Jan 2004
Posts: 13,840 Likes: 13
shareholder in the making
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shareholder in the making
Joined: Jan 2004
Posts: 13,840 Likes: 13 |
Dave, glad your back, I was wondering about you a few months ago...
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Re: Double Blind Test
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Joined: May 2002
Posts: 10,654
shareholder in the making
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shareholder in the making
Joined: May 2002
Posts: 10,654 |
Charles, I don't know the reason for the "still" comment on the 50Hz note. If a sub or a regular speaker is designed to reproduce 50Hz, it'll do so with 10 or 20 watts input. The output would depend on its sensitivity, of course. If there's some notion that the 50Hz note would somehow need more power than the same speaker would need for the same sound level at 500 or 5000Hz, that isn't the case. Volume is volume, sensitivity is sensitivity. The obvious illustration of this is the speaker graphs taken at 1 watt(typically about 85-90dB). In good speakers the volume is relatively constant. There's no upward slope as the speaker goes from the bass to "easier" mid-range and treble frequencies.
-----------------------------------
Enjoy the music, not the equipment.
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Re: Double Blind Test
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Joined: Jun 2005
Posts: 1,189
connoisseur
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connoisseur
Joined: Jun 2005
Posts: 1,189 |
I appreciate the welcome back. You guys are great friends as well as masters of knowledge. It's good to see everyone here again.
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