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Dr_Rez 02-17-2012 12:06 AM

Quote:

Originally Posted by rnrloser_IX (Post 1155712)
Yeah. If I'm not mistaken, I read somewhere that to double the total decibels output of an amp, you need something in the ballpark of quadruple the wattage. Like I said, if you're amp can put you to par with your drummer and everyone else, than thats as loud as you need. Then, instead of sinking your money into getting the "loudest amp," try and put it toward sound quality.

Hey GB, I have a Valveking 212 and I like it an all, but there are a few tonal things that I'm not overly satisfied with. For some reason, at distance my amp gains a lot of highs and the lows start to choke out a bit. I've noticed this with my friends amp too. Also, the sound is very linear,not so much expansive. Is this just an anomaly with guitar amps or is this my amp? If it is, then is there a way I could fix that? I've played with the tones until I've gotten good balance and cut, but that trend is always there.


Again while the loudness is not really the issue when people get high attage stacks and such, it is the amount of frequencies needed. A small amp can not push enough air to get those mammoth bass/mid heavy tones some bands need. If you go in a room and put the nicest most expensive low wattage combo next to a Jcm 800 or other 100 watter of similar quality you will quickly hear the tonal diffidence. The JCm will appear louder because of the fuller sound. (keep in mind also they would both be running into the same cab.

Smaller amps let you carry them around easily, overdrive much sooner, and many other great qualities but for live playing and recording the bigger amps will always be preferred for any bass/mid intensive music.

GuitarBizarre 02-17-2012 05:51 AM

Quote:

Originally Posted by RezZ (Post 1155708)
Check this link out.
Class-A Amplifiers explained



No but it is a good gauge of how loud the amp will "sound" to you. While it may barely be louder 100 vs 15 watts yours ears will hear the extra frequencies being pushed through giving it a fuller sound tricking your ears into thinking its actually louder.

That is why bands with lower mids/bass heavy music use such high wattage amps. (besides just looking cool) While using a miced/unmiced 30 or even 50 watter you will get just as loud but wont have nearly the same full sound when the lower notes are being played. Now this is assuming of coarse all the amps have the same speaker rating and speaker size.

Thats bull****. Wattage only, 100% ONLY affects the amount of clean headroom you have before your amplifier starts to distort. Your frequency response will be exactly the same as long as you're matching up the cabinets correctly.

Metal bands use high wattage heads becase

1 - They don't know any better
2 - They're usually driving a 4x12 cab. THAT is where your extra bass and tonal range is coming from, the 4x12 cab.

And you can drive a 4x12 cab with lots of low wattage heads. There's people out there driving 4x12 cabs with 15 watt class 5 marshalls.

Dr_Rez 02-20-2012 02:37 AM

I cant describe what Im trying to say well so Ill quote this guy:

"Basically, folks are impressed with high horsepower numbers. A car that has 300 hp MUST be faster than one having 250 hp, right? Not really, and not in the real world. Horsepower comes into play when you are talking about top-end speeds. However, torque shows its might when you are cruising on the freeway and then need to pass someone. A car with higher torque figures will accelerate quicker from 60-80 than one that has higher horsepower. Hence the saying, "People buy horsepower, but they drive torque." You are constantly passing folks in everyday driving, how often do you make a top-end run?

How does this apply to audio amplifiers? Again, this is a simplification of a fairly complex idea. People buy "watts per channel", but they listen to "amperage". In most cases, a 100 watt/channel amp that has 30 amps current delivery will not sound as good as an 80 watts/channel amp that has 50 amps of current delivery. This is one of the two main reasons* why most folks feel that tube amps sound better than sand amps (solid state). Generally, the amp with the higher amperage rating will sound "better" than one that has a lower amperage rating.

High-current amps exert more control over the movement of the speaker's drivers, especially the woofers. This is why you will read reviewers' comments that state that the higher amperage amplifier had more "guts" or sounded "ballsier" than its lower current competitor. And, in the real world, I have found this to be true. I used to have an NAD 3150 and an NAD 2150 integrated amps that were bridged to run in mono, one amp for each channel. In this configuration, they were kicking out about 170 watts/channel. Keep in mind that this amp is rated at 50 watts/channel when running non-bridged. And these amps had high-current capability and they sounded VERY good for the money I paid.

So, long story short, look for amps that have high-current capability - they will generally sound better than amps that deliver less amperage. Good examples of high-current amps are Harman/Kardon, Hafler, Butler, Bryston, and NAD.

I have always sought out amps that had high-current capability and it seems that the speakers I prefer like to be fed with high-current amps. All other things being equal, always go with the high-current amp.


*The other main reason is that tube amps output their distortion with even order harmonics, SS amps produce odd order harmonic distortion. Apparently, even order harmonic distortion is more "pleasing" to the ear than is odd order harmonic distortion."


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