Voltage Step Converter With Amplifier?

[TLS Guy]

Well, assuming I get it, which I still consider a long shot, I won't have it re-wired. I'll store it until I can feed it the 240V.

Not to beat a dead horse, but what about a 120-240 converter with a dual plug. So two 20 amp 120V circuits feeding the converter which is outputting 240V?

You had better make sure both 20 amps circuits are on the same phase in the panel, or you will have a learning experience you will never forget!

 

[PENG]

I agree with TLSG, such practice shouldn't even be allowed in residential dwelling where people could easily do it wrong due to lack of electrical knowledge. You need to pick two independent separate ccts that are totally dedicated for the amp and that they are on the same phase. Then you get 120X2X20=4800VA, whereas a 30A 240V cct. will provide 30X240=7200VA. Not a good deal at all.

 

[PENG]

I
Just a thought; lets say you're getting a really great deal on the mystery amp.
Check the price of having its transformer swapped with one of the correct voltage.
Or, still assuming it's such a great deal, sell it to someone that has the proper 240v outlet.

Rick if you do that you will be limited to 2400VA unless you feed it with two separate 20A cct. from the same phase and that is a bad idea IMHO.

 

[walter duque]

Alex I got a feeling that amp is gonna end up on my rack anyway. Don't worry about it, I got your back. Do I need it-NO- do I want it Yes (gotta have it). I have a spot all figured out for it already. You really don't want it anyway. Time is getting close. Look at it this way, at least you're not stuck with it.

 

[fuzz092888]

Alex I got a feeling that amp is gonna end up on my rack anyway. Don't worry about it, I got your back. Do I need it-NO- do I want it Yes (gotta have it). I have a spot all figured out for it already. You really don't want it anyway. Time is getting close. Look at it this way, at least you're not stuck with it.

Hey hey hey, I'll bid against you all day. Looks like it's time to raise my bid

 

[Rickster71]

Rick if you do that you will be limited to 2400VA unless you feed it with two separate 20A cct. from the same phase and that is a bad idea IMHO.

Hi Peng
I'm in the dark as to the exact amp that's being discussed. Fuzz may be keeping it a secret so Walter can't out bid him.
Guess I was thinking if the amp was sold in the USA it could have a multi-tap xformer or a dual voltage switch, or an option the manufacturer or electronic shop could change/add for him.

 

[TLS Guy]

Hi Peng
I'm in the dark as to the exact amp that's being discussed. Fuzz may be keeping it a secret so Walter can't out bid him.
Guess I was thinking if the amp was sold in the USA it could have a multi-tap xformer or a dual voltage switch, or an option the manufacturer or electronic shop could change/add for him.

Rich,
It is some pro cinema amps built by a chap called Bob. From what specs I gather from Walter Dubuque, it is neither practical or safe to power this with 120 volts.

It needs a 240 volt supply delivering at least 15 amps I would say and a slow blow breaker to boot.

In my opinion, while you might be able to meet the running needs on a 120 volt circuit, you would never get it started. See the recount of my problems starting my amp case, that is less powerful than this, and you will see the problem. That is on the previous page of this thread.

It is built in the US, and is set at 240 volts because that is what it needs. You have to think welder, for the installation of this amp and not domestic HT.

You would never use a welder on a 120 volt supply, or at least not one that is any good.

 

[fuzz092888]

Rich,
It is some pro cinema amps built by a chap called Bob. From what specs I gather from Walter Dubuque, it is neither practical or safe to power this with 120 volts.

It needs a 240 volt supply delivering at least 15 amps I would say and a slow blow breaker to boot.

In my opinion, while you might be able to meet the running needs on a 120 volt circuit, you would never get it started. See the recount of my problems starting my amp case, that is less powerful than this, and you will see the problem. That is on the previous page of this thread.

It is built in the US, and is set at 240 volts because that is what it needs. You have to think welder, for the installation of this amp and not domestic HT.

You would never use a welder on a 120 volt supply, or at least not one that is any good.

This one isn't from Bob. It's from eBay, although I'm not sure it would still be qualified as a pro cinema amp. I know the company used to make pro cinema amps, but now they sell as kind of a high endish HT amp. It's a Cinepro. Not sure if they still use Bob's design, or something similar to it. It sure looks a heck of a lot like Bob's home theater line of amps and the old Cinepro I have that was built by Bob, back when he was OEM for Cinepro.

I know they make the amps in question in 120V or 240V, I'm just not sure whether they use different transformers or have a single transformer with multiple taps or something else to switch the voltage.

 

[Haoleb]

You had better make sure both 20 amps circuits are on the same phase in the panel, or you will have a learning experience you will never forget!

I am confused here what you mean by making sure it is on the same phase but I am guessing this 120-240 converter with two 120 plugs is simply a rigged up 240 outlet using two 120 cords plugged into different sides of the main panel... I mean rather than a typical 240v outlet using the hot from one side of split phase and the other hot from the other side of the split phase going to a typical 240 outlet you have two 120 plugs that you run one into one receptacle and then have to find another receptacle on a different circuit (on the other side of the split phase) and voila 240.

If you were on two plugs on the same phase how would you get 240v?