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#165158 - 07/04/07 07:06 PM Re: Release date of the A1400-8 [Re: michael_d]
Ian Offline
President
aficionado

Registered: 03/13/01
Posts: 808
mdrew,

There will be lots of specs coming out prior to the pre-order date. We are in the middle of it right now.
_________________________
Ian Colquhoun
President & Chief Engineer

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#165159 - 07/04/07 09:27 PM Re: Release date of the A1400-8 [Re: Ian]
chesseroo Offline
connoisseur

Registered: 05/13/02
Posts: 4829
Loc: western canada
Something to stare at while we wait:


_________________________
"Those who preach the myths of audio are ignorant of truth."

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#165160 - 07/04/07 09:46 PM Re: Release date of the A1400-8 [Re: Ian]
CV Online   confused
Founder, Axiom Upgrade Club
shareholder in the making

Registered: 07/20/06
Posts: 11208
Loc: Richland, WA, USA
Can you just make some specs up in the meantime?

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#165161 - 07/06/07 06:47 PM Re: Release date of the A1400-8 [Re: CV]
Ian Offline
President
aficionado

Registered: 03/13/01
Posts: 808
CV,

Unfortunately making them up would put us in with a pretty big crowd. Attached are the specs we have so far; more to come next week.














_________________________
Ian Colquhoun
President & Chief Engineer

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#165162 - 07/06/07 07:13 PM Re: Release date of the A1400-8 [Re: Ian]
avdude Offline
veteran

Registered: 06/03/07
Posts: 118
Loc: Ont, Canada
Thanks Ian .. That will keep the number crunchers happy .. for a while ... I knew I should have got spy pics or something when i was there last week .. I just never realized there was a market for inside info on this ..

Avdude..
_________________________
Pio VSX1018,LPA-1,M60,M3,Qs8,Vp150,HSU VTF3,,Pio 5080,PS3..

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#165163 - 07/06/07 07:42 PM Re: Release date of the A1400-8 [Re: Ian]
chesseroo Offline
connoisseur

Registered: 05/13/02
Posts: 4829
Loc: western canada
Excellent charts.
Everyone loves charts.

Quote:

Unfortunately making them up would put us in with a pretty big crowd.



Hey, is that dig at the competitors?

_________________________
"Those who preach the myths of audio are ignorant of truth."

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#165164 - 07/06/07 07:56 PM Re: Release date of the A1400-8 [Re: chesseroo]
Mojo Offline
connoisseur

Registered: 01/21/07
Posts: 3292
I think he meant that he would end up with a pretty big crowd...in jail .

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#165165 - 07/07/07 11:00 AM Re: Release date of the A1400-8 [Re: Ian]
Mojo Offline
connoisseur

Registered: 01/21/07
Posts: 3292
Ian,

Kudos to all of you at Axiom. All specs are impressive so far but I am particularly impressed with the noise floor and the frequency response. It looks like the 3dB point is out in the boonies at around 50KHz. When available, can you post the graphs for 2, 8 and 16 Ohms so that we can see how well the feedback network is designed ? Let us also marvel at the phase response.

And you've managed a really short dead time (maybe 10 nsec or less) with virtually seamless switching to achieve such excellent THD.

I bet there will be a big party at Axiom when you've finally finished this project.

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#165166 - 07/12/07 02:09 PM Re: Release date of the A1400-8 [Re: Mojo]
alan Offline
connoisseur

Registered: 01/29/02
Posts: 3188
Loc: Toronto/New York/Dwight
Hi Mojo and all,

We've got a new spec to post on the A1400-8 amplifier from Axiom's R&D engineer, Tom Cumberland. The spec is called "DC Offset," which many manufacturers simply won't post on their amplifiers because the DC offset may be excessive.

For the Axiom A1400-8, the DC offset is truly tiny, approximately 0.0001 volt--that's one-ten-thousandth of a volt, a fraction of the value that many conventional amplifiers often exhibit.

What's DC offset? It's really interesting. The power supply of any amplifier has to deliver a positive voltage and a negative voltage from the power-supply rails, but often the voltage is offset a bit to one side or the other--too much negative voltage or too much positive voltage. In theory, the power supply should deliver equal amounts of positive and negative voltages; in reality, there may be more negative (or positive voltage) from the supply rails. When this happens, and you have your speakers connected but there is no audio signal, the offset voltage will force the driver's voice coil either slightly outwards or inwards, away from the center of the magnetic flux from the speaker magnet. When this DC offset goes uncorrected, this means that the excursion of the voice coil will be non-linear. When high-amplitude audio signals come along, this may mean the voice coil is forced out of the magnetic flux because it's already offset from the excessive amounts of DC offset, so the motion of the voice coil and diaphragm becomes very non-linear.

The great thing about the Axiom A1400-8 is that the DC offset is 1) extremely low in value (other amps may exhibit ten to 20 times as much DC offset as the A1400-8) and 2) the A1400-8's DC offset is dynamically self-correcting so that no matter what the value of the incoming audio signals, the DC offset will be minimized to an insignificant value at all times, thus assuring the linear motion of all the drivers' voice coils driven by the A1400-8 amplifier.

We'll have some more charts and specs next week.

Regards,
_________________________
Alan Lofft,
Axiom Resident Expert

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#165167 - 07/12/07 02:26 PM Re: Release date of the A1400-8 [Re: alan]
dllewel Offline
connoisseur

Registered: 06/20/05
Posts: 1189
Loc: Utah, USA
Very intersting!

Thanks for sharing this Alan.
_________________________
-Dave

M80s VP150 QS8s EP500s
ravenmanor.com/cinema/

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