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#202383 - 03/28/08 11:02 PM Re: A1400-8 [Re: ihifi]
jakewash Offline
shareholder in the making

Registered: 12/26/03
Posts: 10398
Loc: Calgary, Alberta
 Originally Posted By: ihifi
The A1400-8 actually pushes about one horsepower (745W) per channel in two-channel mode on a 15A supply and even higher on a 20A supply without clipping , distortion, compression, or heating up like a toaster. And, you can even put it sideways in a cabinet! \:\)

John
Not according to their own specs. 1 channel driven into 4 ohms would be 700W. I know they are being conservative.
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#202384 - 03/28/08 11:04 PM Re: A1400-8 [Re: jakewash]
ihifi Offline
local

Registered: 10/06/06
Posts: 280
Loc: CT
1 channel full and 6 channels at 1/8th power is also 700W into 4 ohms.


Edited by ihifi (03/28/08 11:05 PM)
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#202393 - 03/29/08 02:12 AM Re: A1400-8 [Re: Dundas]
jakeman Offline
aficionado

Registered: 10/03/05
Posts: 851
Loc: Toronto
 Originally Posted By: Dundas
Makes it sound like a religious conviction not informed opinion but each to his own.

btw, Dan D'Agostino is "very much against" class D amplifiers


He is quite informed about it and not alone in his views; he didn't need much encouragement from me on that one. The main problem with parametric equalization is that the filters introduce ringing and phase errors which can make sound audibly worse especially in the mid and high range. I use manual equalization sparingly and only in the bass regions where those side effects are less noticeable. Auto-equalization, like the current Audessey stuff, is an unfortunate bullet which rarely works well but does seem to have found a niche with people who aren't comfortable with manual adjustments or like the placebo effect they provide.

Dan D'Agostino designs wonderful Class A amps. I'm a big fan of Krell products. Five years ago I would have agreed with his views about Class D amps but todays designs are much different than what was available when he designed the Krells and easily challenge the best linear amps. Having read some of his comments, I'd say he is out of touch with developments in Class D and agree with Mojo that his comments are somewhat self serving. With the improvements in switching technology and the natural advantages of Class D in weight, size, cost and heat, its inevitable that the Class D amps will continue to displace Class As.
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#202395 - 03/29/08 02:21 AM Re: A1400-8 [Re: ihifi]
jakeman Offline
aficionado

Registered: 10/03/05
Posts: 851
Loc: Toronto
 Originally Posted By: ihifi
The A1400-8 actually pushes about one horsepower (745W) per channel in two-channel mode on a 15A supply and even higher on a 20A supply without clipping , distortion, compression, or heating up like a toaster. And, you can even put it sideways in a cabinet! \:\)

John


Good point John. Like Jason said Axiom is being conservative with the specs. For people (like me) who have 20 amp circuits the Axiom amp should be renamed an A-2000-8. However any one channel is limited to 1440W by the protection circuit. If running all channels under the same loads, you should get close to 1000w in stereo mode or 633w in 3 channels, 500W into 4 channels etc. In reality most of the power will be dynamically allocated to whatever channel requires more.
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#202451 - 03/29/08 01:43 PM Re: A1400-8 [Re: SirQuack]
Kpt_Krunch Offline
regular

Registered: 03/12/08
Posts: 7
 Originally Posted By: sirquack
"far more powerful" ?


Yep.... hehe, but I typed to fast .. I meant to say the PA2000 is taller than the A1400 but the A1400 is far more powerful (doesn't make much sense when you leave out "but the A1400".. sorry about that).

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#202453 - 03/29/08 01:48 PM Re: A1400-8 [Re: jakewash]
Kpt_Krunch Offline
regular

Registered: 03/12/08
Posts: 7
 Originally Posted By: jakewash
 Originally Posted By: Kpt_Krunch

However, I want to go full out - a 7 channel amp. The PA2000 is taller than the A1400, and it is far more powerful.


Am I misreading this? you are saying your bridged H/K @ 100W/Ch is more powerfull than the A1400 @ 200W/ch?


Nope, that's exactly what I wrote. I mis-typed it. So much for me knowing 'a littl bit' about amps LOL. As you see from my corrected post - that is what I meant to say (and did say,in my head, my fingers got a little ahead though and forgot to type that part in).

That's why I'm so interested. Here you got an amp that is not only smaller, but offers 8 channels of amplification, and is far more powerful, then my bridge PA2000 (hope that reads better lol).

Like I mentioned though, the big thing now is sound quality. From what I've read so far, that should also be a big improvement (not that H/K sounds bad).

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#202481 - 03/29/08 04:04 PM Re: A1400-8 [Re: Kpt_Krunch]
jakewash Offline
shareholder in the making

Registered: 12/26/03
Posts: 10398
Loc: Calgary, Alberta
I think the sound quality is probably about the same as long as you are with in the useable range of the amp. However, those with the A1400 say it does have better attack/reaction, better low notes etc. to the music than the other amps/receivers they have used, even at low volumes, which makes me really want to hear one, I keep waiting for Mojo to buy one so I can have a listen. ;\)
_________________________
Jason
-----------------
TTTHHHPPPPPTTTT!

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#202489 - 03/29/08 04:24 PM Re: A1400-8 [Re: jakewash]
Mojo Offline
connoisseur

Registered: 01/21/07
Posts: 3292
Mojo will never buy one if he keeps spending his time on these boards instead of making a buck.

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#202490 - 03/29/08 04:25 PM Re: A1400-8 [Re: jakewash]
jakeman Offline
aficionado

Registered: 10/03/05
Posts: 851
Loc: Toronto
 Originally Posted By: jakewash
However, those with the A1400 say it does have better attack/reaction, better low notes etc. to the music than the other amps/receivers they have used, even at low volumes, which makes me really want to hear one, I keep waiting for Mojo to buy one so I can have a listen. ;\)


That summarizes it well. ;\)
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John

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#202503 - 03/29/08 05:24 PM Re: A1400-8 [Re: jakewash]
fredk Offline
axiomite

Registered: 12/06/07
Posts: 7031
Loc: Canada
 Quote:
...say it does have better attack/reaction
= slew rate?
This is how Tom Cumberland summed up the A1400. Tons of power + better slew rate/speed = better amp.

When I asked how much power the M80s need, Debbie gave the usual "any 100wamp will do" answer. Tom didn't miss a beat... "A kilowatt."

It took a bit of browbeating by Debbie to get Tom to admit you could drive the M80s with a 100w amp, but he really believes you need a lot more power to get the best out of them. The exchange was quite entertaining.
_________________________
Fred

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Blujays1: Spending Fred's money one bottle at a time, no two... Oh crap!

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