ATI AT3000 amps

[RichB]

I got curious again so I took a glance of their website. They did mentiion "optical". That sounds encouraging because optical, such as fibre optic based device would be superior in terms of fast response, but would likely cost more than just using T/Cs or "Klixon" that are simple bi-metal devices commonly found in motor winding thermal proction applications. They may still use electronic circuitry to supplement the optical temperature sensing device though but I doubt they would do that as everything adds costs.

They have optical circuits to protect the speakers from shorts and they have a Magnetic power switch protection thingy.
I plugged the ATI and forgot to turn of the power switch. There was and ARC that blew my 20 amp breaker and the power protection magnetic switch. That would probably have blown a fuse on a conventional design.

ATI and their Outlaw cousins are really well protected designs.

- Rich

 

[PENG]

They have optical circuits to protect the speakers from shorts and they have a Magnetic power switch protection thingy.
I plugged the ATI and forgot to turn of the power switch. There was and ARC that blew my 20 amp breaker and the power protection magnetic switch. That would probably have blown a fuse on a conventional design.

ATI and their Outlaw cousins are really well protected designs.

- Rich

Thanks, but I am quite you have it reversed. Magnetic trip ccts are typically for short cct protection and optical for thermal.

 

[AcuDefTechGuy]

They have optical circuits to protect the speakers from shorts and they have a Magnetic power switch protection thingy.
I plugged the ATI and forgot to turn of the power switch. There was and ARC that blew my 20 amp breaker and the power protection magnetic switch. That would probably have blown a fuse on a conventional design.

ATI and their Outlaw cousins are really well protected designs.

- Rich

After replacing 3 fuses on 3 Acurus amps, I was very turned off by fuses.

Great protection and over-protection is very good indeed.

 

[AcuDefTechGuy]

Thanks, but I am quite you have it reversed. Magnetic trip ccts are typically for short cct protection and optical for thermal.

I have no idea what that means, but it sounds good.

 

[PENG]

I have no idea what that means, but it sounds good.

Magnetic force is related to current not heat so good for short cct protection like fuses but not so good for thermal. Optical can sense heat and response quickly to temperature rise, quicker than thermal couples and RTDs. Think optical thermometers.. I think Rich knows but might have made a typo.

 

[RichB]

Thanks, but I am quite you have it reversed. Magnetic trip ccts are typically for short cct protection and optical for thermal.

From the ATI 2000/3000 Manual:

Main Circuit Breaker​

Your amplifier is supplied with a heavy-duty magnetic circuitbreaker. If power to your amplifier is interrupted, inspect thecircuit breaker on the rear of the unit. If the circuit breaker isin the off position you may reset it to the on position torestore AC power. If the circuit breaker immediately trips tothe off position, unplug the amplifier from the AC power​

source and contact the ATI Service Department.

Protection Circuitry​

Your ATI amplifier uses an advanced optically coupledprotection circuit that does not require fuses and is completelyisolated from the audio path. In the event that the amplifiersenses a shorted speaker wire the protection circuit willengage shutting down the output and will sample the state ofthe amplifier every 7 seconds (nominal). The output will becut off as long as the short exists. The amplifier will begin to​

operate normally after the shorted situation is repaired.

Magnetic for main circuit breaker and Optical for speaker connections.
I have not seen this in other amps.

- Rich

 

[PENG]

From the ATI 2000/3000 Manual:



Magnetic for main circuit breaker and Optical for speaker connections.
I have not seen this in other amps.

- Rich

Sorry, I was at work so did not read the manual. On the website in the features section they just say Protection circuits: optically -..... ,since we are on the subject of thermal protection at the time I thought they meant sensing temperature optically, when in fact they are talking about optically coupled, without wires, in order to isolate from the audio path.

Still, the magnetic circuit breaker is also for short circuit protection but since it is what they call the "main circuit breaker", it will take a hell of a short for it to trip, whereas the optically coupled circuit senses shorts at the output, presumably each output, so it should be much more sensitive.

Interestingly I did a text search of the manual for the AT3002 and there is no mentioning of thermal protection at all. Thermal protection is only mentioned in the AT6012 manual.

 

[RichB]

I sent my Outlaw 7500 to ATI for an out of warranty repair because the left-rear channel was humming.
According to Outlaw the following was repaired:

[FONT=Courier-New+0]

Replaced transformers,
power switch,
5 X resistors, and
10 X capacitors​

[/FONT]

Not bad for $125.
I never thought it sounded as good as the ATI 3005 so maybe there was a reason for that.
When it comes back, I will do some quick comparissons to the Parasound A51 with a friend (who is a huge Outlaw fan).

That Should be fun.

Thanks to ATI for a very reasonable repair !

- Rich

 

[AcuDefTechGuy]

That is cheap! My AT2004 front metal handles cost like over $50, so $125 ain't bad at all.

 

[Rickster71]

There was and ARC that blew my 20 amp breaker and the power protection magnetic switch.
- Rich

Sounds like you have Arc Fault breakers in your panel.
That's one of their biggest complaints. When high draw appliances are inadvertently left on, they trip the breaker when plugged in.
Some states chose to deviate from the NEC and don't require Arc Fault breakers, because of nuisance trips.

 

[RichB]

Sounds like you have Arc Fault breakers in your panel.
That's one of their biggest complaints. When high draw appliances are inadvertently left on, they trip the breaker when plugged in.
Some states chose to deviate from the NEC and don't require Arc Fault breakers, because of nuisance trips.

I am told that I do not have arc fault breakers in my panels.
However, the time I arced, I had the ATI3005 in the system not the Outlaw 7500.

Hopefully, it will ship out today.

- Rich

 

[RichB]

The saga continues.
The 7500 came back with 2 scratches on the faceplate and a dented top cover (from the inside up).

I would have tried to replace it myself, but Outlaw wants it shipped back to california.
My amp is racking up quite of few miles. I wonder if there are travel points


View attachment 12188

- Rich

 

[slipperybidness]

The saga continues.
The 7500 came back with 2 scratches on the faceplate and a dented top cover (from the inside up).

I would have tried to replace it myself, but Outlaw wants it shipped back to california.
My amp is racking up quite of few miles. I wonder if there are travel points


View attachment 12188

- Rich

Dang. I feel for you. I hope the shipping isn't on your dime?

 

[RichB]

No. Outlaw or ATI is paying.
The scratches were not there when I shipped it out for the last repair or I would have requested a new faceplate.

Somebody messed up and it is costing them. There are no winners here.

- Rich

 

[Irvrobinson]

The saga continues.
The 7500 came back with 2 scratches on the faceplate and a dented top cover (from the inside up).

I would have tried to replace it myself, but Outlaw wants it shipped back to california.
My amp is racking up quite of few miles. I wonder if there are travel points


View attachment 12188

- Rich

Those look like they were made by the prongs of an electrical plug. And a dented top cover to boot, which may have happened by resting the amp on the removed top cover. (It happens.) It is difficult to maneuver heavy amplifiers on a bench and during packing and unpacking. I almost dropped my AT3005 trying to get it out of the box. That would have ruined my day.

 

[slipperybidness]

Those look like they were made by the prongs of an electrical plug. And a dented top cover to boot, which may have happened by resting the amp on the removed top cover. (It happens.) It is difficult to maneuver heavy amplifiers on a bench and during packing and unpacking. I almost dropped my AT3005 trying to get it out of the box. That would have ruined my day.

Ruined your day, who are you kidding....ruined your month.

It has been a while since I've seen a grown man cry

 

[AcuDefTechGuy]

The saga continues.
The 7500 came back with 2 scratches on the faceplate and a dented top cover (from the inside up).

I would have tried to replace it myself, but Outlaw wants it shipped back to california.
My amp is racking up quite of few miles. I wonder if there are travel points


View attachment 12188

- Rich

Wow. Egregious. Can it be any more unlucky for you.

 

[RichB]

I think Irv got it right.
At boxing up, it probably got lifted onto its face slip the bag on.

Since I have the Parasound, I am not left high-and-dry.

- Rich

 

[Cos]

I think Irv got it right.
At boxing up, it probably got lifted onto its face slip the bag on.

Since I have the Parasound, I am not left high-and-dry.

- Rich

Rich, if I were you I wouldn't walk under any ladders, you seem to have the worst luck with your AV Gear.
- Defective Marantz AV8801
- Defective Parasound
- Outlaw 7500 scratched

At least Parasound took care of your problem quickly, but jebus, you have had a bad run as of late.

 

[RichB]

Rich, if I were you I wouldn't walk under any ladders, you seem to have the worst luck with your AV Gear.
- Defective Marantz AV8801
- Defective Parasound
- Outlaw 7500 scratched

At least Parasound took care of your problem quickly, but jebus, you have had a bad run as of late.

You have a point.
Did I mention that I replaced one of my Salon tweeters?

All companies have stepped up and I am operational.
I am not bothered; there are more important things on life

- Rich