Originally Posted by heyworld2020
If you TURN OFF room correction on your new amp, how does it sound compared to the old one?
i have try "pure direct" and it sound the same "bommy" bass.
And dumb question, were the bass and treble FLAT on the old amp? Was loudness OFF? (Are you sure?)
on my old amp there is no room correction and it was on direct, sound better.
i'm really dont now nothing about hometheater and right now i have amp that output 80W 2CH and its sound bad.[/QUOTE]
Here's a little something to confuse the situation, then some clarity.
But first, the reasons your old amp may sound better to you. Older tech was meant to play to the middle of the road, so there may be a fuller sound at default settings, but when tweaked properly, the new system could sound better. OR
You're just used to the way it sounds
Wattage ratings of Amps and speakers are not always equal.
Let's say your 4 ch amp is rated at 100W/ch.
So what's the real rating? bc mfgrs will lie cheat and steal to make their amp rating look better.
There are at least 3 possibilities of what the true rating is. 1. RMS 2. Peak 3. Peak to Peak.
Looking at a a sine wave at 200 Watts Peak-Peak [Wp-p] we see that it has + and - 100 W Peaks. Knowing that RMS [root mean square] of a sine wave is .707. We deduce some things.
200W p-p is the same as 100 W pk and is the same as 70W RMS. So a good amp Co like Denon will tell you 100W RMS while a cheap Co will say it's 280W p-p [Again - SAME!]
Also know that the usually test 400-800 hz Sine wave for the "rating" and it gets even more confusing.
A few good rules. These are my rules, YMMV
1. Look for RMS and don't buy anything that uses any other measuring type.
2. Match the RMS as closely as possible. Though you can get away with a bit of difference. Never plug a 200W RMS amp into 10W speakers. Just turning the amp on could blow the speakers and possibly fry the amp. Look for no more than about 2 to 1 and the closer, the better. A severely underrated amp will not drive big speakers well either BTW.
3. NEVER run the amp at 100%. it's not really designed to go over about 85% cleanly or for any length of time. A good rule is stay under 70% if possible.
4. Pay close attention to placement. Especially high freq speakers. in a 5.1/7.1 system, [or any system with subs] the sub is generally for very low freqs. at 100hz, for any room in a house, you will not be able to hear the location bc the wavelength is going to be massive. EG: about 16 ft. so bass will fill just about any room no matter where in the room the speaker is. For a high speaker, it will matter a lot 5000hz [speaking range, the length is about 2 in. You need to locate the L, R and Ctr speakers appropriately.
So, to clarify it a bit.
For the avg home theater You'll want an amp with 100-250W RMS per ch. and speakers rated 50-150 highs and mids, and 100-300 subs [ISH]
And the sub can be anywhere in the room, but on the floor at least, and the L,R speakers equally from the Ctr. both front and rear. Then it's time to play with surround and "loudness" settings. Only you can hear when the setting is right for you.