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 Post subject: vox aga70 acoustic amp
PostPosted: Sun Jan 16, 2011 3:07 pm 
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Spacemonkey & Superstar

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So....

I bought one of these about 2 weeks ago as I'm being asked to do a few small pub gigs here and there and don't want to lug around my PA -

Image

It's loud and the tube pre is marvellous sounding running the Guild through it, the chorus is good, the reverb excellent - the tonal variety provided by the "colour" option is excellent also

HOWEVER

Running a phantom powered mike through the clean channel (with the guitar through the tube pre channel - when the amp heats up (after about half an hour) the Mic input breaks up/distorts/doesn't work. Tried this with multiple Mics and leads - its fairly consistent - takes about a half hour to go to bollocks.

Oh dear I thought - that's not going to be easy to demonstrate as a fault - took it back to the shop - and said its developed a fault - can I have a replacement - expecting them to ask what the fault is etc.....

Instead of which there is a knowing look between the sales people and the manager says - no problem, we'll swap it right away -

sales person toddles back 2 minutes later with a "replacement" - I take a good look at it - and the back has been opened - screws have screwdriver marks etc etc - not only that when I turn it round theres the sound of a screw rattling around in there.....

errr - I say - thats not a lot of good is it....

Fair enough says the manager and sorts out a new one to be shipped to me on Tuesday -

hmmmmm

what's the consensus then - I reckon its 50/50 re the new one having the same fault - seems to me that Vox may have an endemic issue with this amp....

I may be being paranoid :-) - more news on Tuesday when I test out the replacement...

Cheers

Richard

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PostPosted: Sun Jan 16, 2011 3:18 pm 
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Mr. Blues
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Hi Richard,

donĀ“t worry too much about it. Sounds like a bad soldier joint. Must not happen with every of this amps.

Good luck with the new one
Andreas

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PostPosted: Sun Jan 16, 2011 3:21 pm 
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Wants You
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You should be able to sort out rather quickly if the problem is going to repeat itself. If it happens again I'd try something else.


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PostPosted: Sun Jan 16, 2011 5:05 pm 
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Spaminator Extraordinaire
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Am I reading correctly you are using the amp for both vocals and acoustic/electric guitar? Or are you using the amp to mic the guitar?

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PostPosted: Sun Jan 16, 2011 5:42 pm 
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Drivel Starter

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Sometimes an old or bad output capacitor will give a broken distorted sound after it heats up. An old (40 years)Gibson amp did and the tech replaced all the caps. Now it works fine. My old fender Montreaux amp does this. They swapped the board the first time. Now it is to old but the problem is only on the dirt channel.
Sounds like you have a new amp. Probably bad solder (cold solder)as Blackbeer suggests. Nowadays a lot of circuit boards are wired up and floated on hot solder to do everything at once. Kind of like dipping. Not as infallible as hand wiring. Hard to see the problem. Need the tester to probe all connections. Easier to swap for a different one. Good luck.
Bruce

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PostPosted: Sun Jan 16, 2011 7:51 pm 
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The Reverend
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you can blame Korg... :x

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PostPosted: Mon Jan 17, 2011 9:46 am 
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Spacemonkey & Superstar

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RZ - amp is for both vox and guitar -

Hopefully it's a one off then - :-)

Cheers

Richard

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PostPosted: Mon Jan 17, 2011 8:25 pm 
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sleepless wrote:
RZ - amp is for both vox and guitar -

Hopefully it's a one off then - :-)

Cheers

Richard


Ok thanks. I wasn't sure it did both. Hopefully it's just a bad unit. I was going to recommend something like this perhaps.

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PostPosted: Tue Jan 18, 2011 11:11 pm 
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Spacemonkey & Superstar

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Well - 45 mins going through some songs and no issues with the replacement that arrived today -

probly means it will break just after the years warranty is up then :)

I did consider a more PA like solution - but I thought the Vox was nice and easy to cart about for pubs etc - minimal set up time and sounds pretty good for something so small ..

Richard

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PostPosted: Sun Jan 23, 2011 8:46 pm 
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The Reverend
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is the new avatar photo before or after a pub gig? :?

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PostPosted: Sun Jan 23, 2011 10:44 pm 
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Robbie The Botkiller
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bokchoy wrote:
is the new avatar photo before or after a pub gig? :?


That's right after a discussion with the drummer...

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PostPosted: Thu Jan 27, 2011 8:17 pm 
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Spacemonkey & Superstar

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It's the jester of doom...

The clown of despondancy

in RayBans :-)

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