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PQM 13 is louder at 1300w than UKP2100x at 2100w?! |
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Timebomb 
Old Croc 
Joined: 11 October 2004 Location: Lancaster Status: Offline Points: 2717 |
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 Posted: 03 September 2016 at 5:32pm |
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Well done, ive been playing with a PQM13 this afternoon, if you set the limiter on the ultradrive to -22dB it will stop the amp clipping in 4 channel mode ( with 0.775V input sensitivity) ive not tried it in bridge yet.
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James Secker facebook.com/soundgearuk
James@soundgear.co.uk www.soundgear.co.uk |
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charlysays
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Joined: 16 June 2015 Location: Wales Status: Offline Points: 413 |
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Posted: 03 September 2016 at 6:45pm |
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They're nice amps aren't they! Nice build quality, everything seems solid and well calibrated.
They have guts too when it comes to bass. -22 is the one... I've had clip lights flicker when running sub off a poor supply. Whether or not it requires the same input voltage in bridge is down to circuitry (the matrix has a different input sensitivity for different modes and impedances) but the manual doesn't mention any connection between mode and input sensitivity so I'm guessing there is circuitry in there to compensate |
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njw
Old Croc
Joined: 26 March 2010 Location: S. Wales Status: Offline Points: 2574 |
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Posted: 03 September 2016 at 8:51pm |
I've left many, many amp racks unattended over the years, the password is a god send as if all the amp gains are wound right up with limiting and gains set on the lms all people with busy fingers can do is turn it down!
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cravings
Old Croc
Joined: 30 January 2007 Location: Ireland Status: Offline Points: 7442 |
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Posted: 03 September 2016 at 9:10pm |
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although to be fair, the dbmark and xilica ones i have are kind of unintuitive.. if people start fiddling they normally just press mute buttons...
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Timebomb
Old Croc
Joined: 11 October 2004 Location: Lancaster Status: Offline Points: 2717 |
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Posted: 03 September 2016 at 9:35pm |
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I kinda worry about input sensitivity switches, some people will fiddle with them...
Yeah quite like the PQM13 so far, not done any A/B testing with other amps yet but it seems to sound alright.
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James Secker facebook.com/soundgearuk
James@soundgear.co.uk www.soundgear.co.uk |
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bass*en*mass
Old Croc
Joined: 03 September 2009 Location: "unknown" Status: Offline Points: 4009 |
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Posted: 04 September 2016 at 2:15pm |
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if you set them at 0.77V and limit accordingly all that could happen is switching to lower sensitivity..?!
(more input required from lms/dsp so nothing in danger imo) |
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Timebomb
Old Croc
Joined: 11 October 2004 Location: Lancaster Status: Offline Points: 2717 |
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Posted: 04 September 2016 at 2:59pm |
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Yep, Ultradrive limiters will only go down to -24dB though, so wouldn't be able so power limit if using the amp to run 1 stack, eg 2 channels bass, 1 channel low mid, 1 channel mid high, i would want the mid high limiters lower than that so would have to use a different input sensitivity setting, or use a different LMS. Also its a bit more noise with 0.775V.
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James Secker facebook.com/soundgearuk
James@soundgear.co.uk www.soundgear.co.uk |
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corell
Young Croc 
Joined: 19 August 2013 Location: Berlin Status: Offline Points: 1161 |
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Posted: 04 September 2016 at 3:20pm |
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or use a XLR attenuator :) i use a -10db one on my PQM8 powering my biamped tops.
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charlysays
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Joined: 16 June 2015 Location: Wales Status: Offline Points: 413 |
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Posted: 04 September 2016 at 3:22pm |
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Surely just leave the limiter at -22 and subtract decibels from the output band on the ultradrive. First or second page I think... seems to work for me.
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Timebomb
Old Croc
Joined: 11 October 2004 Location: Lancaster Status: Offline Points: 2717 |
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Posted: 04 September 2016 at 5:46pm |
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That wont be safe though, turning that band down dosent stop someone increasing the level at the mixer and turning it up again, you need to set a limiter on that band at the correct level to protect the dri ver from over power, i dont want to allow 1kw+ through to a 100w mid high 8"...
Corell is right an attenuator cable is a good fix
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James Secker facebook.com/soundgearuk
James@soundgear.co.uk www.soundgear.co.uk |
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charlysays
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Posted: 04 September 2016 at 6:22pm |
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It is on my setup as I have a cloud cx335 limiting to 0.775v before the ultradrive. Without that I can see what you mean!
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charlysays
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Posted: 11 September 2016 at 11:04am |
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Used the matrix UKP2100Xs all night bridged into an 18nlw9000s on Friday and it was trouser flapping :) Amps blew warm air playing music with a lot of sub but never got hot at all. Very pleasing setup and sounded effortless all night!
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cravings wrote: