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description: Audio advice and discussions with audiophiles and professionals. Free discussion forums, open to all and frequented by industry experts. Ask questions and get advice on stereos, speakers, hi-end amplifiers, pre-amps, home theater, tube hi-fi, turntables, vinyl, tweaks, music, films, video, DVDs and more.
items: JBL Tent amps: lots of watts for $$$
items: Re: JBL Tent amps: lots of watts for $$$
items: 220V outlets
items: does being made for 50Hz. power matter?
items: 50-60Hz power
items: JBL power amps
items: Re: JBL power amps

JBL Tent amps: lots of watts for $$$
type: item
description: 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
creator: BillEpstein
date: 2003-03-01T13:35:30-00:00

Re: JBL Tent amps: lots of watts for $$$
type: item
description: 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
creator: Chris R
date: 2003-03-01T13:41:02-00:00

220V outlets
type: item
description: 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
creator: LuxmanLover
date: 2003-03-01T15:07:26-00:00

does being made for 50Hz. power matter?
type: item
description: 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
creator: Sam P.
date: 2003-03-01T15:45:46-00:00

50-60Hz power
type: item
description: 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.
creator: Wayne Parham
date: 2003-03-01T18:50:50-00:00

JBL power amps
type: item
description: 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
creator: Formica
date: 2003-03-24T02:42:59-00:00

Re: JBL power amps
type: item
description: 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.
creator: Wayne Parham
date: 2003-03-24T04:29:22-00:00