Second new tc electronic K210 cab has bad vibrations - stumped??

60bass

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Apr 24, 2005
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Well here's the saga....

So I ordered a new tc K210 cab from GC. It got delivered right at the same time as I was walking out the door running late to get my daughter to her karate class, so I just put it inside the door. When I get home later and take a closer look I see the box is way beat up with the top flap tape ripped open on both ends. Two plastic banding straps were loosely strapped around the box (pretty sure those aren't factory applied). Holes punched through the box on both sides too. Marks on the box told me it had laid on it's side with other stuff on top. If I'd have had the time to look it over when it was delivered, I'd have refused delivery.

box.jpg


So I take a chance that it might be OK so I open it up. Sure enough there's a big dent on the front edge about an inch deep that lines up perfectly with a puncture mark on the box. Something went through there or the cab was dropped.

gash.jpg


dent.jpg

The dent was way worse than it looks in the picture.

I decide to hook it up and see how it sounds. It had a real bad vibration in the cabinet that was very noticeable when playing any "A" note on the bass. The vibration/buzzing while playing the 12th fret on the A string was so loud it made the cabinet virtually unusable. So I start a damage claim and UPS comes and picks up the cab.

I call GC and tell them what happened and they say OK no problem. We'll ship out a replacement today. I ask don't you need to hear from UPS regarding the damage claim? They say nope, so I ask if they're going to charge my card again for the replacement cab till they hear from UPS. They say no you already paid for a cab and it was damaged. That isn't your fault and we will make sure you get the cabinet you paid for. I'm impressed with GC'c CS on this matter. They really delivered this time.

So....the replacement cabinet arrives today. The box and packing look great and the cabinet when unpacked looks perfect.

k210.jpg


That's where the perfection ends though. I hook up the cabinet and it has the same vibration on any "A" note as the first cabinet did. If anything it vibrates worse. I check all the screws and everything is tight. I try both my tc BH250 and my tc RH450 heads and the cab vibrates with both. I move the cab to another room and it still vibrates. So this one goes back too. There's no visible damage so I'm going to drop it at the local GC and let them deal with it. Not going to get another K210 though. After two in a row I don't want to deal with another possible bum cab.

This really has me stumped. Why both cabs with the same issue and why only on the "A" notes? A run of bad speakers? Bad tweeters? I find it hard to believe there's a structural issue causing this even though it sounds like one. Maybe if it only happened on the first dented cab but not both.

Cell phone recording of vibrations. On the last A note you can really hear it. If my cellphone can record it, you know it's bad.



Now what to replace the K210 with?
 
This really has me stumped. Why both cabs with the same issue and why only on the "A" notes? A run of bad speakers? Bad tweeters? I find it hard to believe there's a structural issue causing this even though it sounds like one. Maybe if it only happened on the first dented cab but not both.

Just out of curiosity, have you tried playing it in multiple locations? I don't know how many times I've been 100% certain some rattle or buzz was coming from my cab, only to find out it's coming from something else completely unrelated in the environment. Our ears can play tricks on us as far as sound-sources are concerned.

Sorry, I have no other help other than that, just figured I'd chime in from personal experience on that one. Best of luck getting this resolved - I know how frustrating it can be when new gear underperforms. :(
 
Just out of curiosity, have you tried playing it in multiple locations? I don't know how many times I've been 100% certain some rattle or buzz was coming from my cab, only to find out it's coming from something else completely unrelated in the environment. Our ears can play tricks on us as far as sound-sources are concerned.

Sorry, I have no other help other than that, just figured I'd chime in from personal experience on that one. Best of luck getting this resolved - I know how frustrating it can be when new gear underperforms. :(

I briefly tried it outside the room and still noticed the vibration. I plan on doing some more extensive testing in other areas of the house later today. I have no issues with any of the other cabs or amps in that room so I'm still leaning towards the cabinet having an issue of some sort.
 
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Just out of curiosity, have you tried playing it in multiple locations? I don't know how many times I've been 100% certain some rattle or buzz was coming from my cab, only to find out it's coming from something else completely unrelated in the environment. Our ears can play tricks on us as far as sound-sources are concerned.

Sorry, I have no other help other than that, just figured I'd chime in from personal experience on that one. Best of luck getting this resolved - I know how frustrating it can be when new gear underperforms. :(
Yeah, I have seen this as well. Makes troubleshooting a tab difficult. Solid walled room with nothing in it - if possible - helps.
 
Just out of curiosity, have you tried playing it in multiple locations? I don't know how many times I've been 100% certain some rattle or buzz was coming from my cab, only to find out it's coming from something else completely unrelated in the environment. Our ears can play tricks on us as far as sound-sources are concerned.

Sorry, I have no other help other than that, just figured I'd chime in from personal experience on that one. Best of luck getting this resolved - I know how frustrating it can be when new gear underperforms. :(

Yeah, I have seen this as well. Makes troubleshooting a tab difficult. Solid walled room with nothing in it - if possible - helps.

Well I tried the cab in a couple of other rooms here at home. Still had vibrations same as before. The only difference is they aren't as noticeable in a larger room or at a lower volume. So to give it a final try I took it out to my garage with the cars pulled out and the garage door open. Tried the cab in both vertical and horizontal orientation. Got it pretty loud and I was able to stand a good 15 or so feet away as well as sitting close up so had a good chance to test it out.

This cab has issues, just like the first one did. There is a noticeable vibration on any "A" note with the worst being the 12th fret on the A string. It's always there and can be heard, albeit not as loudly in a larger room. I easily heard it from 15 feet away and I have damaged hearing in one ear from 48 years of bass playing. So yeah it's there.

As to why both K210 cabs exhibited the same phenomenon, your guess is as good as mine. BTW none of my other 3 cabs or 3 heads have this problem in the same room. It only happens with the K210 cab? It almost sounds like a resonance frequency vibration issue but I'd find it hard to believe that tc would allow a cab to go to production with that problem. Plus they've been selling this model for enough years that any bugs like that would have been fixed long ago. So still stumped and the cab is getting returned. Maybe if I'd bought the cab used with this issue I'd take everything out and see what's going on. But on a new cab, why bother.
 
Well here's the saga....

So I ordered a new tc K210 cab from GC. It got delivered right at the same time as I was walking out the door running late to get my daughter to her karate class, so I just put it inside the door. When I get home later and take a closer look I see the box is way beat up with the top flap tape ripped open on both ends. Two plastic banding straps were loosely strapped around the box (pretty sure those aren't factory applied). Holes punched through the box on both sides too. Marks on the box told me it had laid on it's side with other stuff on top. If I'd have had the time to look it over when it was delivered, I'd have refused delivery.

View attachment 2755133

So I take a chance that it might be OK so I open it up. Sure enough there's a big dent on the front edge about an inch deep that lines up perfectly with a puncture mark on the box. Something went through there or the cab was dropped.

View attachment 2755135

View attachment 2755137
The dent was way worse than it looks in the picture.

I decide to hook it up and see how it sounds. It had a real bad vibration in the cabinet that was very noticeable when playing any "A" note on the bass. The vibration/buzzing while playing the 12th fret on the A string was so loud it made the cabinet virtually unusable. So I start a damage claim and UPS comes and picks up the cab.

I call GC and tell them what happened and they say OK no problem. We'll ship out a replacement today. I ask don't you need to hear from UPS regarding the damage claim? They say nope, so I ask if they're going to charge my card again for the replacement cab till they hear from UPS. They say no you already paid for a cab and it was damaged. That isn't your fault and we will make sure you get the cabinet you paid for. I'm impressed with GC'c CS on this matter. They really delivered this time.

So....the replacement cabinet arrives today. The box and packing look great and the cabinet when unpacked looks perfect.

View attachment 2755151

That's where the perfection ends though. I hook up the cabinet and it has the same vibration on any "A" note as the first cabinet did. If anything it vibrates worse. I check all the screws and everything is tight. I try both my tc BH250 and my tc RH450 heads and the cab vibrates with both. I move the cab to another room and it still vibrates. So this one goes back too. There's no visible damage so I'm going to drop it at the local GC and let them deal with it. Not going to get another K210 though. After two in a row I don't want to deal with another possible bum cab.

This really has me stumped. Why both cabs with the same issue and why only on the "A" notes? A run of bad speakers? Bad tweeters? I find it hard to believe there's a structural issue causing this even though it sounds like one. Maybe if it only happened on the first dented cab but not both.

Cell phone recording of vibrations. On the last A note you can really hear it. If my cellphone can record it, you know it's bad.



Now what to replace the K210 with?


Dear Sirs

Please allow me to introduce my myself, my name is Paul Charsville and I am a Care Specialist at MUSiC Group in Kidderminster UK where we service and manage spare parts for all MUSIC Group brands.
In regards to your issue with the K210 we would love to help you resolve your issue. Would you be able to contact our technical support team to discuss the problem in more detail ? you can reach us at care@music -group.com on
+ 1-702-800-8290(US) or +44 1562 732299 (UK).

Paul Charsville
Specialist, Customer Care
Music Group
 
Dear Sirs

Please allow me to introduce my myself, my name is Paul Charsville and I am a Care Specialist at MUSiC Group in Kidderminster UK where we service and manage spare parts for all MUSIC Group brands.
In regards to your issue with the K210 we would love to help you resolve your issue. Would you be able to contact our technical support team to discuss the problem in more detail ? you can reach us at care@music -group.com on
+ 1-702-800-8290(US) or +44 1562 732299 (UK).

Paul Charsville
Specialist, Customer Care
Music Group


Paul thanks for the offer but since the cabinet was within the vendor's return window I just took it back to the store.
 
What cab did you end up going with, did it resolve the resonance issue? I've been going back and forth between the TC Electronic K-210 and the Gallien-Krueger CX 210; just hoping a recent batch of K-210 cabs are having issues and not all.

I returned the tc cab to my local Guitar Center store to save the charges on return shipping. While I was there they had some Acoustic brand cabinets on clearance sale. I ended up with the BN115 NEO 15" cabinet. Since I was looking just for a cab to run here at home, and the price was under $250.00 for a plywood cab with a NEO it was too good of a deal to pass up. Rear ported and has tons of bottom. Surprised as it sounds real good for a cheepo cab.

I thought about going with the K212 but funds didn't permit that. Maybe down the road.

acoustic.jpg



b115.jpg
 
Hi guys, I bought a TC Electronic K212 on line and the cab presents the same problem! The cab hasn't exterior damages and obviously it's new. It's so strange!

Sorry to hear that. I never did find out what was going on with the two cabs I tried. Now to hear that you had the same problem I'm wondering if tc got a bad run of speakers, tweeters, or plywood with internal voids that vibrate (I ran into that with a Fender pro series cab) from their suppliers.

I never went so far as to pull the cab apart to search for loose joints, glue ups, or other structural issues. I did however remove the port covers to gain a bit more room to reach inside and to tighten up the screws for the speakers and any other screws I could easily reach. However that had no affect on the vibration. Very puzzling for sure. I also own two of the tc RS112 cabs and have had zero issues with those. If I get any more tc cabs I'm going to avoid the K series cabs.

Hope you get yours straightened out. Maybe a call to tc might be in order.
 
Fortunally I contacted the music shop and they'll repay me.I will not buy another k-series cab: I'm sure that TC is a great company but maybe that cabs are too much cheap and so breakable. In my cab the strange vibration come from only one speaker, maybe it was damaged during shipping...
 
Fortunally I contacted the music shop and they'll repay me.I will not buy another k-series cab: I'm sure that TC is a great company but maybe that cabs are too much cheap and so breakable. In my cab the strange vibration come from only one speaker, maybe it was damaged during shipping...

Glad that you're going to be getting a refund. I'm almost positive that my K cabs also had only one speaker that sounded like it was vibrating too. I've seen tweeters cause that type of noise if the magnet is loose. Maybe that's the problem.