UPDATE GOOD NEWS! A bad QSC experience (update your K series speaker!)

Sep 6, 2003
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Northumberland, UK
Hi all,

If you can't be bothered to read the majority of this post, fair enough. However, please be aware there's an issue with the K series speakers bricking themselves and making themselves unrecoverable. This can be avoided by updating your firmware. Please do this in order to not end up like me.

So I have been the happy user and owner of a pair of QSC K12.2s for a few years now. To the point where I'm just not interested in amps anymore, they're that good. I know a few people on here also use and love these speakers. A few months ago now I had an issue where one of my speakers stopped making sounds during a set break. I can't stress this enough: it worked perfectly fine the first set, then I came back on for the second set and nothing. I stumbled through the gig by putting some bass through the singer's wedge and when I got home I decided to see what had happened.

The speaker had started saying there was a speaker error and it was trying to self-diagnose a problem by playing a 100Hz test tone. So, I press enter and the speaker asks 'can you hear the test tone clear and undistorted?' Well, no I can't. In fact I can't hear it clearly or otherwise, there's no sound from the speaker at all. A little googling reveals the fact that this is known issue with the speaker, has effected lots of people, and it can be avoided by updating the firmware. Don't be like me and live in blissful ignorance of this problem, if you own this speaker then update it now.

So, I try to update following the instructions on the QSC website. The process goes exactly as the site says they should. However, this makes the problem worse. My speaker is now stuck in a constant boot loop. It doesn't stay on for long enough to do anything or check anything.

It's completely bricked.

Please note that I have not broken it. It broke itself.

At no point has this speaker had anything other than light use. It occasionally gets used as a stage wedge when I need to. It's always high passes (usually around 120Hz) and nowhere near full volume, I'm in quiet bands! It's done maybe 30 gigs. I don't always use a wedge and when I do I have two to choose from. The other speaker by the way has had its firmware updated and seems to be working fine for now.

So, I contact the shop I bought it from. Can't help, out of warranty. So I call QSC's distributor in the UK. They can't help, it's out of warranty. I ask if they can repair it anyway, they say maybe but I'm going to have to pay to ship it down to them, pay an inspection fee and then maybe, if I'm lucky, I'll get to pay them a third time to fix it, then a fourth time to get it shipped back. This is going to cost hundreds of pounds with a "less than even" (direct quote from them) chance that they can even do anything.

I'm now at the point where I'm scouring ebay for a used or refurbished amp module that I'm going to have to buy out of my own pocket, ship (probably import) and then pay to get installed by some local amp tech. This all seems a bit low-brow for an expensive piece of PA tech. It's not like this is a vintage tube amp with serviceable components.

I'm just really annoyed that I haven't done anything wrong here. QSC have sold me (at great expense) a product that breaks itself, literally whilst it's not being used, and then not given me a sensible, practical, reasonably affordable way to get it fixed. This would never fly with Ashdown or GK, companies that pride themselves on serviceable and repairable products. Joke's on me for not proactively googling for issues with this speaker I suppose but then who does that? If this had been an issue before I bought the speaker then it might have come up, but I have some of the first '.2' speakers and so it was unknown at the time. As I say, I'm sort of out of the amp world as I've just been so happy until now so I haven't been hanging around the QSC forums or anything.

If you own a K series, update it now. If you don't own a K series but you are considering it then please be aware that the customer service that I have received in the UK is pretty shocking. EDIT- after Agedhorse reminded me: I have emailed QSC USA (in my defense that was just the first email address I found on their website) and they have told me that all UK issues must go through their UK sales office, which was fine, but they then said that they only deal with sales and that repairs should be done with the distributor, so we went round in circles.

I don't expect a company to just provide free service on everything forever, I get it. But again, this is something inherent to the speaker. It was made faulty. I didn't break it, overuse it, or do anything wrong. It's just a fault with it from the beginning and everyone I've spoken to has essentially told me that it's not their problem. Whilst I would have loved for somebody at QSC or the UK distributor to own up and offer to take care of it for me (like a car recall I guess) they could have at least offered a solution other than just 'ship it hundreds of miles down the country and even then we probably won't fix it'.

Thank you for reading this vent! If you can commiserate with me then please do, if you have any suggestions then please share them.

EDIT - If you want to more about the issue, a search for 'QSC K protect mode 4' will get you everything you need.
 
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I have three K10.2s that I use for monitors. They've been great so far, but it sounds like I need to do some research.

This thread might need to be moved to Live Sound.
 
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Ah yeah you're probably right. Sorry I bought a pair for very occasional PA use but I still think of them like amps.

My understanding is that it's most common on the 10s, then the 12s and 8s are rarer but still common enough. A google for 'qsc k10.2 protect mode 4' should get you started.
 
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I am going to ask you a simple question... have you contacted QSC directly to see what they may be able to help you or your distributor with? Generally, their support is very good but dealing with distributors puts you one step away from "the horses mouth" so to speak. You should be able to email the support desk directly or via the "create a case" tab. You can also call them, noting the time zone difference (QSC is US pacific standard time)

Support - QSC

Also, here in the US, Triple S Electronics (in New Jersey USA) offers service of the amplifier module for $210 (USD) plus shipping. You might contact them to see if it may be practical to have them repair it. They are a large, comprehensive service company.
 
I'm not affiliated with the youtube video or QSC in any way, but the K.2 Series is notoriously unreliable.



I have local friends who buy used K Series instead, very reliable. We've known about this for the last couple of years....lots of failures, intermittent shutdowns, etc.

They have sold tens of thousands of the K.2 series speakers and I have not seen any "history" of unreliability compared with similar products given the number out there. There are videos all over the web promoting all kinds of ridiculous claims without the slightest proof, which suggests that the viewer beware that they may in fact be "fake news" to promote an agenda or click-throughs. Beware of presenting this stuff "as fact".
 
Deleted my previous comment, but I've seen this happen multiple times first hand. Not basing it on YouTube. At worst, the video is confirmation bias. Cheers.
 
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I miss the days when music gear was hardware, not software. If I'm going to brick a speaker I should receive a display of smoke, not a boot loop. Also, get off my lawn.

Well, part of the problem is that a lot of things people want PA equipment to do now needs software. If you want an all-in-one solution, you likely will need signal processing, and it's not simple signal processing either, it's much more complicated to try and make something that can be used in so many applications but still protects itself from user error, and that means software.

QSC really stretched the marketing for those powered cabinets saying that a K.10.2 or a K.8.2 could be used as a bass amp. That's more novelty than reality.
 
I have 4 of the older generation QSC speakers, 2 12s and 2 10s, that I have used on and off for PA and my keyboard speakers for the past 10-15 years. They never let me down yet. And I don't think I can update firmware on those. just putting it out there that they have worked great for me.
 
Hi all,

If you can't be bothered to read the majority of this post, fair enough. However, please be aware there's an issue with the K series speakers bricking themselves and making themselves unrecoverable. This can be avoided by updating your firmware. Please do this in order to not end up like me.

So I have been the happy user and owner of a pair of QSC K12.2s for a few years now. To the point where I'm just not interested in amps anymore, they're that good. I know a few people on here also use and love these speakers. A few months ago now I had an issue where one of my speakers stopped making sounds during a set break. I can't stress this enough: it worked perfectly fine the first set, then I came back on for the second set and nothing. I stumbled through the gig by putting some bass through the singer's wedge and when I got home I decided to see what had happened.

The speaker had started saying there was a speaker error and it was trying to self-diagnose a problem by playing a 100Hz test tone. So, I press enter and the speaker asks 'can you hear the test tone clear and undistorted?' Well, no I can't. In fact I can't hear it clearly or otherwise, there's no sound from the speaker at all. A little googling reveals the fact that this is known issue with the speaker, has effected lots of people, and it can be avoided by updating the firmware. Don't be like me and live in blissful ignorance of this problem, if you own this speaker then update it now.

So, I try to update following the instructions on the QSC website. The process goes exactly as the site says they should. However, this makes the problem worse. My speaker is now stuck in a constant boot loop. It doesn't stay on for long enough to do anything or check anything.

It's completely bricked.

Please note that I have not broken it. It broke itself.

At no point has this speaker had anything other than light use. It occasionally gets used as a stage wedge when I need to. It's always high passes (usually around 120Hz) and nowhere near full volume, I'm in quiet bands! It's done maybe 30 gigs. I don't always use a wedge and when I do I have two to choose from. The other speaker by the way has had its firmware updated and seems to be working fine for now.

So, I contact the shop I bought it from. Can't help, out of warranty. So I call QSC's distributor in the UK. They can't help, it's out of warranty. I ask if they can repair it anyway, they say maybe but I'm going to have to pay to ship it down to them, pay an inspection fee and then maybe, if I'm lucky, I'll get to pay them a third time to fix it, then a fourth time to get it shipped back. This is going to cost hundreds of pounds with a "less than even" (direct quote from them) chance that they can even do anything.

I'm now at the point where I'm scouring ebay for a used or refurbished amp module that I'm going to have to buy out of my own pocket, ship (probably import) and then pay to get installed by some local amp tech. This all seems a bit low-brow for an expensive piece of PA tech. It's not like this is a vintage tube amp with serviceable components.

I'm just really annoyed that I haven't done anything wrong here. QSC have sold me (at great expense) a product that breaks itself, literally whilst it's not being used, and then not given me a sensible, practical, reasonably affordable way to get it fixed. This would never fly with Ashdown or GK, companies that pride themselves on serviceable and repairable products. Joke's on me for not proactively googling for issues with this speaker I suppose but then who does that? If this had been an issue before I bought the speaker then it might have come up, but I have some of the first '.2' speakers and so it was unknown at the time. As I say, I'm sort of out of the amp world as I've just been so happy until now so I haven't been hanging around the QSC forums or anything.

If you own a K series, update it now. If you don't own a K series but you are considering it then please be aware that the customer service that I have received in the UK is pretty shocking. EDIT- after Agedhorse reminded me: I have emailed QSC USA (in my defense that was just the first email address I found on their website) and they have told me that all UK issues must go through their UK sales office, which was fine, but they then said that they only deal with sales and that repairs should be done with the distributor, so we went round in circles.

I don't expect a company to just provide free service on everything forever, I get it. But again, this is something inherent to the speaker. It was made faulty. I didn't break it, overuse it, or do anything wrong. It's just a fault with it from the beginning and everyone I've spoken to has essentially told me that it's not their problem. Whilst I would have loved for somebody at QSC or the UK distributor to own up and offer to take care of it for me (like a car recall I guess) they could have at least offered a solution other than just 'ship it hundreds of miles down the country and even then we probably won't fix it'.

Thank you for reading this vent! If you can commiserate with me then please do, if you have any suggestions then please share them.

EDIT - If you want to more about the issue, a search for 'QSC K protect mode 4' will get you everything you need.


Apologies if you already know… or if already mentioned…

I have had quite a few K.2’s (of which I have updated firmware)… but one of the reasons I went with QSC (other than sound quality) is the 6yr warranty! Have you looked into that?

Again - apologies - if you’ve already done so - I’m traveling - didn’t read entire post.

I’m ‘converting’ to the CP’s (although they only make 12” & 8”… they are half the wattage (enough for me) - and they aren’t digital - just an EQ ‘dial’ on back.
 
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I miss the days when music gear was hardware, not software. If I'm going to brick a speaker I should receive a display of smoke, not a boot loop. Also, get off my lawn.

I have 4 of the older generation QSC speakers, 2 12s and 2 10s, that I have used on and off for PA and my keyboard speakers for the past 10-15 years. They never let me down yet. And I don't think I can update firmware on those. just putting it out there that they have worked great for me.

The sins I commit far before they reach the speakers

aren't going to be fixed by further adjustments there. :D
 
Well, part of the problem is that a lot of things people want PA equipment to do now needs software. If you want an all-in-one solution, you likely will need signal processing, and it's not simple signal processing either, it's much more complicated to try and make something that can be used in so many applications but still protects itself from user error, and that means software.

QSC really stretched the marketing for those powered cabinets saying that a K.10.2 or a K.8.2 could be used as a bass amp. That's more novelty than reality.

Moved an entire Aguilar rig after running my 12.2 with my Kemper. Plus, it doubles as my guitar rig. It's rarely needed, but I guess it's time to go update it.
 
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Moved an entire Aguilar rig after running my 12.2 with my Kemper. Plus, it doubles as my guitar rig. It's rarely needed, but I guess it's time to go update it.

I could not make it work. I used a few different preamps and ran the DSP in other modes (not the bass guitar mode - which I didn't like) and it was always anemic to me. Since my bass rig has never been particularly large (or I use IEM) it wasn't really giving me a size/weight advantage either.
I know a few that paired a 12.2 with a QSC sub, and that sounded interesting - but that was beginning to get into sound-person-angry territory and again, the difference was modest and there was no weight/size benefit.

Some people like them, though.
 
I could not make it work. I used a few different preamps and ran the DSP in other modes (not the bass guitar mode - which I didn't like) and it was always anemic to me. Since my bass rig has never been particularly large (or I use IEM) it wasn't really giving me a size/weight advantage either.
I know a few that paired a 12.2 with a QSC sub, and that sounded interesting - but that was beginning to get into sound-person-angry territory and again, the difference was modest and there was no weight/size benefit.

Some people like them, though.

Different strokes for different folks for sure. My grandpa used to say, "every monkey has their swing."

Part of the issue people have with profilers is probably what I would bet is at play here. Bottom line is, it's not a bass amp and won't behave like one. It's just a way to amplify whatever you're sending it. My Kemper never sounds like an amp in the room either. It's more of a finished product. Typically a Noble into a 1073 and an LA-2A that I profiled. So the sun's I'm expecting from it aren't what I would expect from a typical amp but more from playback on a PA. That works for some but definitely not all.
 
yeah, i have been a bit hesitant to jump into the K.2 series due to personal concerns with the additional software and potential performance issues. i am always looking out for used K12s instead as they tend to have similar sounds quality, with a simple and reliable interface that suits my modest needs.

i am also curious about the CP12s, as folks seem to have positive comparisons to the K line (for smaller venues, quieter environments) with some added benefits of lighter weight both in hand and pocket-book.
 
yeah, i have been a bit hesitant to jump into the K.2 series due to personal concerns with the additional software and potential performance issues. i am always looking out for used K12s instead as they tend to have similar sounds quality, with a simple and reliable interface that suits my modest needs.

i am also curious about the CP12s, as folks seem to have positive comparisons to the K line (for smaller venues, quieter environments) with some added benefits of lighter weight both in hand and pocket-book.

Not to derail this post, but if you want my opinion on powered speakers as amps, PM me. I demoed everything that 2 guitar centers and a Sam Ash had in stock with my Kemper on bass and guitar. I prefer to shop local or at Sweetwater, that kind of task is perfect for the big box stores.
 
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Not to derail this post, but if you want my opinion on powered speakers as amps I demoed everything that 2 guitar centers and a Sam Ash had in stock with my Kemper on bass and guitar. I prefer to shop local or at Sweetwater, that kind of task is perfect for the big box stores.

yes, i am always eager to hear other opinions based on real-time experience.
but to clarify, I do not use my QSC speakers mainly for bass amplification; they are used as my PA rig for my smaller gigs where they are mostly pushing guitar and vocals, and sometimes supporting bass and kick.
 
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