Post by
Looneybomber »
https://forums.nicoclub.com/looneybomber-u14304.html
Thu Jun 18, 2009 2:04 pm
Well that also depends on your input signal (and the Pioneer also has a selectable input attenuation that could be turned on, but it's a 10db difference so it's very noticable). If your input signal hasn't changed, but one amp/receiver is noticably louder than the other at the same volume level, the gain structures are different, that's all. I say that, because consumer receivers are similar in power output, only varying by a few db's at most. Pro-amps are a different story.
One that's THX certified will put out enough power to drive THX certified speakers to reference level in a certain sized room, which is indicative by it's THX certification. Meaning one company's receiver that's THX select2 certified will produce the same SPL as anothers. Reference level meaning 105db by the speakers at the seating position. 115db by the sub at seating position.
THX is just a means of standardization so that you don't have the issue of turning up one receiver to X volume and another to Y volume in order to produce the same Z output.
Getting more efficient speakers will help with output (obviously), but that's also very expensive. If you have beefy mains that can handle more power, an external amp is always possible, but again, expense and now wife yelling.
I'm sure it's all a setup issue or possibly even another issue I've run across. Clean & dynamic sound, sounds quieter than distorted compressed sound.
I've run into the issue where speakers are very capable, but the receivers aren't. People will crank the volume, the output signal will become clipped and mildly distorted and the sound will be loud. Then, hooking up a very capable power amp, the sound still "sounds" just as loud, but is actually a bit louder and more dynamic due to a lack of clipping and distorting. "Effortless" is the word that comes to mind when describing a very well setup system with very capable amps and speakers.
Out of curiousity, what are you using for mains?
If you're concerned about output you can try a couple things, organized from cheapest to most expensive.1) Turn up the volume more and more until you start hearing distortion from your speakers. Using a reference level input (-0db) see what your master volume hits2) Get a Radioshack SPL meter and play test tones. Measure your SPL with one receiver and then the next. Compare the MV levels each time. If your old receiver is producing more db's than your new one (prior to audible distortion) I'd be nervous that there's something wrong with your new one.3) Get a digital multi meter, a sinewave generator, and a purely resistive load. An oscilliscope would be nice so you could check THD. You could then test each amp at 1% THD and see how much power each puts out at different frequencies and at different impedences. Yeah, your wife will never say yes to buying that.
*edit* Sorry I can't help with the HDMI issue. I use DVI and optical.