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#19937 - 02/27/06 02:00 PM High Current Amp
CJL1138 Offline
Gunslinger

Registered: 05/20/05
Posts: 40
Loc: McKinney, TX
I would like to see the Outlaws develop a high current amplifier in either mono-block of two channel configuration. There are some of us out here with main speakers that aren't very efficient (I have Infinity Kappa 9.1 Series II) for which an amp able to stably drive a one ohm load would be attractive.

My thoughts are along the following lines:
200 watts into 8 ohms
400 watts into 4 ohms
800 watts into 2 ohms
1600 watts into 1 ohm

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#19938 - 02/27/06 02:05 PM Re: High Current Amp
BloggingITGuy Offline
Desperado

Registered: 02/20/06
Posts: 446
Loc: Beaverton, Oregon
The 2200 M doesn't fit that bill already?

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#19939 - 02/27/06 07:44 PM Re: High Current Amp
charlie Offline
Desperado

Registered: 01/14/02
Posts: 1176
What are you going to power that beast with? Your own personal nuclear co-gen plant? Doing the math:

1600x5=8000 watts
8000watts = 8000 VA
8000 VA / 120 V = 67 amps. And that's assuming 100% efficiency. More like 100+ amps in real life.

So ...
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#19940 - 02/28/06 08:01 AM Re: High Current Amp
bestbang4thebuck Offline
Desperado

Registered: 03/20/03
Posts: 668
Loc: Maryland
Visiting the APC UPS product search calculator web site, I find that to cover a load of 1600 watts, I will need a 2200 VA unit. To cover a load of 8000 watts, I will need a 10kVA unit.

However, IMHO, that would be overkill. Why? I have two subs that can pull six amps each under full load, and an Outlaw 770 powering seven 6-ohm rated speakers all on just one 15A circuit breaker. Even running for several minutes with SPL levels pushing over 120dB mid-room, the breaker never tripped. I would say I was not pulling anywhere near the maximum draw of about 3500 watts or 5kVA. In fact the power consumed would have to be about half that at most.

In truth, most listening uses somewhere between 5% and 20% of amplifier power available. Unless one needs enough UPS protection to run amplifier all-channel clipping tests during power failures, don't go too crazy on the protection.

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#19941 - 02/28/06 10:28 AM Re: High Current Amp
Ritz Offline
Desperado

Registered: 07/03/05
Posts: 547
Loc: NJ/Beijing
Is that a nuclear power plant in your basement?

Or are ya just glad to see me?

8-)
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#19942 - 02/28/06 01:21 PM Re: High Current Amp
charlie Offline
Desperado

Registered: 01/14/02
Posts: 1176
Quote:
Originally posted by bestbang4thebuck:
In truth, most listening uses somewhere between 5% and 20% of amplifier power available.
Very true, and I also expect that any reasonable speaker (including those Infinity's) won't tap out the current (hehehe) Outlaw amps in any real listening application. This sort of wishing for a perfect voltage modulated infinite current source is almost never driven by realistic requirements.
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#19943 - 02/28/06 11:21 PM Re: High Current Amp
MeanGene Offline
Desperado

Registered: 06/10/02
Posts: 524
Loc: Simi Valley, CA, USA
I feel that a more powerful amp would be a nice addition to the Outlaw fimaily. For bragging rights if nothing else. That's why I suggested a 5 channel 300W per channel at 8 Ohm amplifier. That would give you a little extra head room for those dynamic moments. I have to run two 20A circuits now to run what I got. I don't think a 300W amp would be a difficult design for the Outlaws. In fact if they took the larger torroidals from the 7700 and put them into a 5300 it might work out great.
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#19944 - 02/28/06 11:49 PM Re: High Current Amp
BloggingITGuy Offline
Desperado

Registered: 02/20/06
Posts: 446
Loc: Beaverton, Oregon
The 7500 is already 80 lbs. Can't imagine how heavy it would have to be to output 50% more power.

I'd say a better idea would be a 300W 2 or 3 channel amp. Then if you wanted to do surround, you could match that with a lower power amp (yeah if you can call 200 W lower power, hehe) for the surrounds.

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#19945 - 02/28/06 11:59 PM Re: High Current Amp
gonk Offline
Desperado

Registered: 03/21/01
Posts: 14054
Loc: Memphis, TN USA
Well, the 790 is reportedly still coming, and it'll be 7x300W at 8 ohms. They apparently had to do some significant re-design due to some heat rejection issues and I suspect they tried to get the other amps into production first, so there hasn't been much news on it in a while, but I think it's still planned.
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#19946 - 03/01/06 12:35 AM Re: High Current Amp
BloggingITGuy Offline
Desperado

Registered: 02/20/06
Posts: 446
Loc: Beaverton, Oregon
Heh, sick.

I think I'll stick with lusting for the 7700. Don't see myself ever getting speakers that need more power than that.

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