220v speaker problems

[Dwgwnr1969]

I have a 220-240v multimedia down firing sub made by golden model no. EM-393 , and I need to get some information on how to get full power with 110 v...any ideas or has anyone heard of this obscure company?

 

[Javier]

the Sub should have a rear switch to change the AC main line from 220V to 125V; did you check in the rear of it?

 

[Audioguru]

Why can't you power it from the 240VAC used for your oven and clothes dryer?

 

[Tha fios agaibh]

1. Get a step-up transformer.
2. Have a 240v outlet installed.
3. Show a schematic and pictures of inside of sub and perhaps circuit can be modified.

 

[Audioguru]

A stepup transformer is not needed because 240VAC is in all USA and Canadian homes.

 

[Tha fios agaibh]

A stepup transformer is not needed because 240VAC is in all USA and Canadian homes.

It's still an option, although installing a 240v outlet would be preferable if it's going in a dedicated place in his home.
For all we know he moves the sub from place to place for his DJ service.

 

[Dwgwnr1969]

It's still an option, although installing a 240v outlet would be preferable if it's going in a dedicated place in his home.
For all we know he moves the sub from place to place for his DJ service.

Thanks for the replies. .really need to know more about the manufacturer

 

[Tha fios agaibh]

 

[tedstruk]

I have a 220-240v multimedia down firing sub made by golden model no. EM-393 , and I need to get some information on how to get full power with 110 v...any ideas or has anyone heard of this obscure company?

I bought one of those cheap ebay from china sub woofer amps and built a great home theatre sub woofer . When I bought it, I thought it was a 110v amp, but when I got it, it was a 220v. Dang, I thought I would never get a subwoofer... but I had a spare 110v to 220v lamp adapter, its not the full double 220v, but I split the source wire and hooked it up as a double... it works great, but I matched the amp impedance of 8 ohms and was very careful to build a stable mount, and I was not messing around with the speaker system. So what you should do, is get a used, but still good, lamp adapter that you can hack, then split the single power line into 2 lines and use that. I should work if you match the impedance of your subwoofer out.

 

[Tha fios agaibh]

what you should do, is get a used, but still good, lamp adapter that you can hack, then split the single power line into 2 lines and use that. I should work if you match the impedance of your subwoofer out.

I'm not sure what you mean by lamp adapter, but I don't like the word "hack" used in an electrical reccomendation.
Btw, I don't see how amplifier output impedance is relevant here, especially if it's fed with its factory 220v.

 

[Audioguru]

A modern solid state amplifier has an output impedance that is very low, 0.04 ohms or less so that it can damp the resonances of a speaker. It has a maximum allowed output current that determines the lowest allowed impedance of a speaker. Old vacuum tube amplifiers had an output transformer that had 4 ohm and 8 ohm output impedances to match to a speaker.

In my kitchen some of the duplex electrical outputs have one 120V phase of the 240V on one of the outputs and the other phase on the other output so that a 15A toaster and a 15A kettle can both be used at the same time. The live wires from each outlet produce 240V like the stove and clothes dryer use.

 

[Tha fios agaibh]

what you should do, is get a used, but still good, lamp adapter that you can hack, then split the single power line into 2 lines and use that.

some of the duplex electrical outputs have one 120V phase of the 240V on one of the outputs and the other phase on the other output so that a 15A toaster and a 15A kettle can both be used at the same time. The live wires from each outlet produce 240V like the stove and clothes dryer use.

What is being talked about here is a horrible idea and a good way to get someone hurt or killed.
If one wants a 240v outlet, just have one installed properly for god sake.
By suggesting that one can plug into separate 120v outlets to derive a 240v circuit, you would end up with live exposed plug prongs. If either plug was removed, someone would likely get electrocuted because power would be feed through the load and out to the other plug.
Splitting up power on separate lines causes hysteresis heating in cabling behind walls.
Also, If there is a short circuit, only one breaker will trip and power will not be totally shut off to the circuit.
All 240v circuits are required to disconnect both phases at the same time for this reason.
The breakers are also required to be dual 120/240v rated for a 240v circuit as opposed to single 120v rated breakers.

Anyone who thinks hacking into household mains or modifying a ul listed cord is a good idea needs to think again.