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#202347 - 03/28/08 06:54 PM Re: A1400-8 [Re: Dundas]
jakeman Offline
aficionado

Registered: 10/03/05
Posts: 852
Loc: Toronto
How do you figure? Firstly the amp doesn't get hot. Secondly if it did there is more heat transfer with the amp on its side. He keeps it that way because of the internal dimensions of the cabinet.
_________________________
John

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#202349 - 03/28/08 07:42 PM Re: A1400-8 [Re: jakeman]
Mojo Offline
connoisseur

Registered: 01/21/07
Posts: 3292
Two 150s are for left and right and one for centre, right?

That's a wonderful room. And it's not treated either.

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#202352 - 03/28/08 08:03 PM Re: A1400-8 [Re: Mojo]
jakeman Offline
aficionado

Registered: 10/03/05
Posts: 852
Loc: Toronto
Yes it is a wonderful room with surprisingly good acoustics. Its not exactly without treatments since the wooden slats on the peaked ceiling effectively act as diffusers. I suppose it has a lot to do with the large airy dimensions (40 ft x 20ft x 15ft) and the fact that the speakers are up high pointed down. The 3 vp150s work very well much to my other surprise.

Initially I had thought m3s or m22s but the horizontal mains seemed to work best with the high placement. Also the a-1400-8 really makes them reach their full potential. The black couch is some 20ft away so the more powerful amp really delivers when dynamic range is needed. No audessey equalization necessary with that Onkyo though he is very much against such things anyway.
_________________________
John

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#202356 - 03/28/08 09:02 PM Re: A1400-8 [Re: jakeman]
ihifi Offline
local

Registered: 10/06/06
Posts: 280
Loc: CT
Your friend is probably the only owner of the A1400-8 using it sideways. It will not get hot; perhaps little warm if he keeps the cabinet doors closed.

Three VP-150s across the top is very interesting; talk about matching the center to the mains. Unless the screen is retractable, one more center below the screen would be ideal. I also read somewhere that the A1400-8 runs cooler if all channels are connected.

With all this recent talk and setups with dual/multiple subs, I am finding myself increasingly motivated toward a second EP-500.

Thanks for the pics, John.

John
_________________________
John
Our HT


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#202359 - 03/28/08 09:42 PM Re: A1400-8 [Re: jakeman]
Dundas Offline
old hand

Registered: 03/02/08
Posts: 71
Loc: Hamilton
 Originally Posted By: jakeman
How do you figure? Firstly the amp doesn't get hot. Secondly if it did there is more heat transfer with the amp on its side. He keeps it that way because of the internal dimensions of the cabinet.


Amplifiers rely on convection cooling that is why the fins on their heat sinks are vertical not horizontal. Probably not a problem but I wouldn't do it. The amp was designed to be horizontal and draw cool air in through the openings in the bottom cover and expel the heated air through the top.
Andrew Marshal commented on some heat in his review but I won't have the time to find out for myself for a few days.

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#202360 - 03/28/08 09:51 PM Re: A1400-8 [Re: Dundas]
Mojo Offline
connoisseur

Registered: 01/21/07
Posts: 3292
It also has a fan and I don't know how the orientation may affect its mechanical behaviour.

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#202362 - 03/28/08 09:58 PM Re: A1400-8 [Re: jakeman]
Dundas Offline
old hand

Registered: 03/02/08
Posts: 71
Loc: Hamilton
 Originally Posted By: jakeman
No audessey equalization he is very much against such things anyway.


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

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#202363 - 03/28/08 10:04 PM Re: A1400-8 [Re: Dundas]
Mojo Offline
connoisseur

Registered: 01/21/07
Posts: 3292
Because they have the potential of killing his business.

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#202364 - 03/28/08 10:07 PM Re: A1400-8 [Re: Mojo]
Dundas Offline
old hand

Registered: 03/02/08
Posts: 71
Loc: Hamilton
 Originally Posted By: Mojo
Because they have the potential of killing his business.


Perhaps that's his motivation but I suspect that Krell could design and market successfully some very expensive class D amps if they had a mind to.

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#202366 - 03/28/08 10:18 PM Re: A1400-8 [Re: Dundas]
Mojo Offline
connoisseur

Registered: 01/21/07
Posts: 3292
That would send mixed messages to his market. Now if he decides to pack in Class A and declare Class D the supreme grand champion of amplifier topologies, that would be a different story \:\) .

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