Purchasing Advise - QSC PL6.0 |
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mattd
Old Croc Joined: 11 February 2006 Status: Offline Points: 1668 |
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Posted: 04 April 2019 at 6:57pm |
My friend has a QSC PL6.0 that I'm interested in buying off him.
Neither of us know the going rate is for this, I would normally do average past sale prices on ebay -10% fee's for a private sale but there are none recently sold to get an idea from that. What is a fair price? It is flight cased so I think we can assume condition is fair not yet checked.
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boots-hifi
Old Croc Joined: 15 August 2011 Status: Offline Points: 2460 |
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Hi Matt. I also have a PL 6.0 which I payed around the £750 Mark for. As ive been unable to find more id be interested in selling it..Pm me if youre interested.
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mattd
Old Croc Joined: 11 February 2006 Status: Offline Points: 1668 |
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Hi Ben.
Is that what you think they are worth second hand? In my head I thought they might he slightly less by now but I don't know why. If I buy this one and like it maybe looking for one more too. Still pondering it at the moment. I'm sure Lev will have a comment as to values (hopefully).
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boots-hifi
Old Croc Joined: 15 August 2011 Status: Offline Points: 2460 |
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At the end of the day mate it’s worth what ever you are willing to pay and the other guy will sell for. PL4.0s go for £500-600 in good nick, I have loads of them and that’s what I’d expect to pay. PL6.0 are quite rare, if it’s a pfc model all good otherwise I’d stay clear. Don’t try and run it from a 13a supply, it’s pointless as they pull even with the PFC allot of current and from doing quite a bit of reading this is why the psu fail. Chances are if it’s not been butchered and is still going then it’s a good one. I’d still expect to pay around a grand for a PL 9.0 so given that anything between £7-800 is about right. There very good on bass, fast and clean. If I could find more I’d buy them all up.
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mattd
Old Croc Joined: 11 February 2006 Status: Offline Points: 1668 |
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Just gone and had a look.
It is a PFC model with a fair bit of rack rash but generally OK. |
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levyte357-
Old Croc Joined: 27 July 2012 Location: UK, South East Status: Offline Points: 8128 |
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I've been offered PL6 non pfc as a trade in, but off a mate, who knows what he is doing, what do people think they are worth now?
Are there people here sellung/buying them. I might sell it on, if people here are interested.
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Global Depopulation - Alive and Killing.
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U.Viktor
Young Croc Joined: 04 May 2010 Status: Offline Points: 716 |
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Flawed electronic design makes QSC PL6-9 series unreliable in long-term and especially under quickly changing AC line conditions. Linear amplifiers went obsolete a decade ago, In case of service requirement you can not buy "linear output power devices" since no semiconductor manufacturer making them anymore! This is why all the large touring companies sold them out. A good switching amplifier for example a K10 from Powersoft is a lot better idea (despite bit reduced sound quality..) Edited by U.Viktor - 31 August 2020 at 5:31pm |
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Sonic the hedge
Registered User Joined: 12 May 2020 Status: Offline Points: 161 |
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Here in the UK we have a very solid well regulated power grid, if your equipment gets damaged by under voltage you can technically make a claim against the DNO (power distribution company) for cost of repairs/replacement. If you find bad mains in the UK, just report it to the DNO they will very quickly come to check it and fix any issues, because if it causes damage or a fire they will be liable. So voltage stability is really not a problem unless you have really bad building wiring. But guess what, building wiring in public buildings is usually good too, because building insurers insist that it gets tested every 5 years by an approved electrician. Edited by Sonic the hedge - 31 August 2020 at 7:58pm |
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U.Viktor
Young Croc Joined: 04 May 2010 Status: Offline Points: 716 |
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Actually that QSC PL power supply have two problems, (1.) that sudden load (or line change) could make an imbalance of B-H curve of isolation transformer then may goes to saturation > sharp current rise could affect primary power switching MOSFETs. (2.) the power supply switching circuit is "hard-switched" and realized by MOSFETs which may not like fast reverse recovery currents due their slow body diodes + hazardous un-clamped D-S Voltage spikes..
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Sonic the hedge
Registered User Joined: 12 May 2020 Status: Offline Points: 161 |
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In that case maybe what's needed is a big lump of iron to smooth everything out
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Earplug
Old Croc Joined: 03 January 2012 Location: Europe Status: Offline Points: 7199 |
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Yes - and a load of "linear output power devices" that "you can not buy", eg:- Edited by Earplug - 01 September 2020 at 9:46am |
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Earplugs Are For Wimps!
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APW
Young Croc Joined: 13 November 2012 Location: Kent, UK Status: Offline Points: 1173 |
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I think he is referring to the ixfh74n20 output devices, they are about an easy to get hold of as rocking horse sh!t…. …. Other hard to obtain device used in the PL6.0/ 9.0 amplifiers are still available however have delivery times of up-to about 6-9 months. Edited by APW - 01 September 2020 at 12:56pm |
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