Jump to content

DYNAMICS


Paducah Home Theater

Recommended Posts

Also you "may" not get the same punch from two different let's say 200w/channel amps. Case in point, when I owned my B&K EX4420, it did not bring out the low and mid bass punch the way my Acurus A200 was able to achieve. Nothing at all against the B&K but the Acurus had/has more bass drive capabilities than any other amp I have ever owned.

 

The Acurus is definitely a high current amp with good size capacitors for great dynamic, did you ever mention that before, lol.  I certainly like the one I got.

Link to comment
Share on other sites

 

The Acurus is definitely a high current amp with good size capacitors for great dynamic

 

You want high current, get your hands on one of the Acurus big brother Aragon amps.

 

Bill 

 

 

 

If we're talking high current amps that start with A, you have to include ATI.  Should be close to the top of the list.

  • Like 1
Link to comment
Share on other sites

Pardon my ignorance, but what exactly does "high current" amp mean?  I know it's not "high wattage" but past that I'm not clear.

 

An amp that can easily drive whatever load you give it.  Klipsch speakers are efficient but at times present amps with a low Ohm load.  High current amps drive them easier and cleaner.  They typically have larger power supplies and caps.

  • Like 1
Link to comment
Share on other sites

In addition.

 

If you listen at lower levels, you'll never hear the difference between a good avr and using separate amplification.  It's only when you push things that you notice an improvement.

 

I went from the baddest HK receiver made (at the time) to separates.  At normal levels, there was no difference.  at 8, 9 or 10/10'ths , the difference was obvious.  It played cleaner louder, hit harder and. never ran out of steam.

  • Like 1
Link to comment
Share on other sites

Processing will continue to change but a nice amp such as suggested above or a Sunfire made in usa amp will be the best investment in sound you can make.  That is why separates have an advantage.  A great amp will stay a long time, then the processing pre amp unit can be replaced as necessary.

Link to comment
Share on other sites

Pardon my ignorance, but what exactly does "high current" amp mean?  I know it's not "high wattage" but past that I'm not clear.

 

This article may clear some things up about "high current" and "high voltage" amplifiers though it is specifically explaining NAD's technology.

 

http://www.stereophile.com/content/nad-c-372-integrated-amplifier-what-powerdrive

 

"A lot of what makes high-end monster amps powerful and expensive is the extra balls required to drive a difficult loudspeaker load—one of very low impedance, perhaps in combination with a large phase angle—at frequencies where music has a lot of energy. Such loads require extra power to keep the amplifier from distorting and to keep the character of the sound from changing. In traditional designs, that extra power is used only when the load would stress a lesser amp—when the amplifier isn't working hard, all that extra power is wasted. "So at 8 ohms, all these big parts that you paid extra for" in that monster amplifier you just bought "are just loafing along," wrote Stidsen in an e-mail.

 

NAD's PowerDrive amplifiers give your speakers what they most crave. When the load is difficult, the circuit maximizes current delivery, but with easier loads—those that don't require so much current—the amplifier switches to "a second, higher voltage winding [that] allows us to employ the full current capability we already have and make it available into 8 ohms," said Stidsen. Simple but clever.

 

Stidsen claims that what sets PowerDrive apart from other designs—such as the "class-G" approach commonly found in pro-audio equipment—"is the way it determines which of these two voltage supplies should be used at any given moment. The circuit senses the operating conditions of the output stage (voltage, current, heat) and decides which rail to switch in, high current or high voltage. For short-term power output, even at 4 ohms, it will stay on the high-voltage rail." Only when the load starts to stress the amplifier does it switch to the low-voltage, high-current rail. The result is "very low distortion into any loudspeaker load, and we get the maximum power from the parts we use," wrote Stidsen."

 

I found this article a few years ago and it is the one that help me to understand the differences between high current/voltage amps.

 

Bill

Edited by willland
  • Like 2
Link to comment
Share on other sites

 

Also you "may" not get the same punch from two different let's say 200w/channel amps. Case in point, when I owned my B&K EX4420, it did not bring out the low and mid bass punch the way my Acurus A200 was able to achieve. Nothing at all against the B&K but the Acurus had/has more bass drive capabilities than any other amp I have ever owned.

 

The Acurus is definitely a high current amp with good size capacitors for great dynamic, did you ever mention that before, lol.  I certainly like the one I got.

 

I like mine as well.  It has doen great with my Paradigm Singnature2 V3's and now with my B&W CM9S2's.  

Link to comment
Share on other sites

In addition.

If you listen at lower levels, you'll never hear the difference between a good avr and using separate amplification. It's only when you push things that you notice an improvement.

I went from the baddest HK receiver made (at the time) to separates. At normal levels, there was no difference. at 8, 9 or 10/10'ths , the difference was obvious. It played cleaner louder, hit harder and. never ran out of steam.

when I bought my first amp the emotiva xpa-5, I always thought I could hear a difference. But it was just placebo. However when I would demo for people with all 7 channels running at reference before I moved and only had my avr power, would distort on just about any material I would play. When you get up high, and your speakers need the power that is for sure when you will notice the difference.

Only time I would disagree with that is if you had heritage speakers or cinema speakers that are crazy efficient, and have paper cones with not much excursion. My cinema theater hits well above reference on my denon 4520 and there is absolutely no signs of struggle for power.

Link to comment
Share on other sites

Scrappy, your placebo could be someone else's holy grail. Some people don't even know what distortion or clipping even sounds like. I'll try and find that article talking about the rf82's and how they sounded better the more power the reviewer fed it.

Link to comment
Share on other sites

Scrappy, You say the amp sounding better was placebo but then say it sounded much better with an amp at high volume. Can you clarify?

placebo as in at lower volumes one can simply "think" it sounds better. And why shouldn't our brain tell us that when we spend hard earned money on something to add to our system. The ultimate test is a blind comparison where the owner knows nothing about either amp hooked up.

But what I easily noticed was specifically ghost protocol scene where the office explodes. When my xpa's were hooked up reference volume was clean. Just loud explosion with no distortion. When I was getting ready to move an had amps all packed up but home theater was still out, I had friends coming by to hear my stuff before I left state. Well that was a great scene to demo until I tried without amps. At reference there was lots of audible distortion. Just sounded terrible. So my opinion on amps is easy. If you don't have power hungry speakers and aren't running multiple channels at very high volumes, you don't need an amp. The 63/64/62/61 combo had a lot of 6 inch woofers to move as well as higher excursion drivers. And the reference stuff all seemed to be about 3-4db off on the sensitivty. Therefor those 7 speakers are a lot for any avr to drive at reference volumes.

  • Like 1
Link to comment
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.
Note: Your post will require moderator approval before it will be visible.

Guest
Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.

×
×
  • Create New...