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JBL Tent amps: lots of watts for $$$ [message #40464]

Sat, 01 March 2003 07:35

BillEpstein
Messages: 886
Registered: May 2009

Illuminati (2nd Degree)

I wonder if these are any good, they have up tp 750 watt models $220 and up

http://www.jblpro.com/pages/electronics/mpaamps.htm

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Re: JBL Tent amps: lots of watts for $$$ [message #40465 is a reply to message #40464]

Sat, 01 March 2003 07:41

Chris R
Messages: 133
Registered: May 2009

Master

The specs look pretty good. The MPA's are spec'd a little
better, have front atten. controls, and XLR inputs. The MPC's
have rear atten. control and barrier strip inputs. I'm pretty
sure they are all 230Vac power input. These would work in my
garage, but not in the house. You'd have to get a 2:1 power
transformer to use in the house. Or hijack the Ms' dryer
outlet. :^)

Chris

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220V outlets [message #40467 is a reply to message #40465]

Sat, 01 March 2003 09:07

LuxmanLover
Messages: 164
Registered: May 2009

Master

It would be no big deal to run a 220 volt dedicated line (which is a good idea for big amps anyway). In fact I'm sure an existing plug could be easily converted by changing the plug and rewiring the feed in the panel.
Kelly

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does being made for 50Hz. power matter? [message #40468 is a reply to message #40467]

Sat, 01 March 2003 09:45

Sam P.
Messages: 307
Registered: May 2009

Grand Master

I was wondering about using them on a dedicated 220 volt circuit, then noticed jbl shows them as using 50Hz. Euro line power. Global economy again, yippeee. I have a picture of the label from the jbl 4648a-8 cartons, where it says made in UK:) Sam

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50-60Hz power [message #40471 is a reply to message #40468]

Sat, 01 March 2003 12:50

Wayne Parham
Messages: 18791
Registered: January 2001

Illuminati (33rd Degree)

I'm sure that the use of 60Hz power on these amplifiers is just fine. They probably use switching supplies, so the input frequency is of little consequence. Usually, unless the input frequency is used for timing of some sort - like in some video equipmemt - the different frequencies aren't a problem. Of course, AC motors run at a different speed too, so that can be a "timing problem" of sorts too. But the point is that while I'd check the documentation to make sure, I'm pretty confident that these amps will work just fine on either 50Hz or 60Hz power.

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JBL power amps [message #40711 is a reply to message #40471]

Sun, 23 March 2003 20:42

Formica
Messages: 1
Registered: May 2009

Esquire

I just happened to come across this thread, and thought i'd let you guys know that I spoke with JBL about these, they are 220V Export models and the MPC200 and MPC300 can easily be rewired for 120V as they are internally wired to handle 3 voltages (100V japan, 120V america, and 220V europe)

The amps were all made by QSC, and the MPC200 is the same unit as the QSC CX4 and the MPC300 is a CX6. I posted a thread at the HT Forum in DIY about these at:

http://www.hometheaterforum.com/htforum/showthread.php?s=5d83e443f45681fc52aae4289b2a8976&threadid=131425

and i also posted the modification to convert them to 120V as described by JBL at:

http://www3.sympatico.ca/bonaz/JBL/JBL-MPC-230V-120V.htm

I have not done any of these modifications myself, and i don't have any info on the MPA units, but i hope this is of some help...

Rob

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Re: JBL power amps [message #40712 is a reply to message #40711]

Sun, 23 March 2003 22:29

Wayne Parham
Messages: 18791
Registered: January 2001

Illuminati (33rd Degree)

Thanks for the useful information. Most equipment with switching supplies has switch-selectable 120/240 VAC input these days. That knowledge makes purchase of these amplifiers risk-free.

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