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BOFH excuse #62: need to wrap system in aluminum foil to fix problem

alt / alt.audio.pro.live-sound / Re: QSC MX 1500 NOT 1500a

Subject: Re: QSC MX 1500 NOT 1500a
From: Tropical Innovation
Newsgroups: alt.audio.pro.live-sound
Date: Sat, 9 Jul 2022 01:11 UTC
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Date: Fri, 8 Jul 2022 18:11:23 -0700 (PDT)
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Subject: Re: QSC MX 1500 NOT 1500a
From: tropicalinnovation@gmail.com (Tropical Innovation)
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On Saturday, March 19, 2016 at 9:19:32 AM UTC-4, Phil Allison wrote:
> pasou...@hotmail.com wrote:
> > Phil Allison wrote:
> >
> >
> > >
> > > ** Then there are the exceptions where both input level controls have to be turned up full.
> > >
> > > The trap being that if one is turned down, the amp still works but the quiet channel overheats something fearful as it acts as a virtual ground for the speaker.
> > >
> > > Lotsa current with no voltage swing, very similar to having that channel's output shorted.
> > >
> >
> >
> > Christ ! You're correct for once but it only applies to shitty amplifiers.
> ** Shame those "shitty amplifiers" are made by QSC or are clones of same.
>
> Not that you would have one tiny a clue abut that.
>
>
> > In decent designs,
>
> ** Yawwnnnnnnnnnnnnnnnnnnnn.............
>
>
> > Graham
>
>
> ** Tell us, did you escape or were you let out ?
>
> I either case, better keep up the meds.
>
>
>
> ... love, Phil
*** I tested the amp on bridged and used the left channel. my volt meter set to AC 150V for testing. shows 60V, I wondered because this is the same voltage of the channel when in stereo mode so I turned up the right volume and there was signal even though the left channel alone was connected at the back. to voltage started raising to over 120 Volts. the manual also says that the amp can output voltages up to 120V when bridged. So both channels should be turned right up in bridge mode.

Subject	Author
Re: QSC MX 1500 NOT 1500a	Tropical Innovation