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Amp Troubleshooting...

Hello fellow BTF'ers,

Got room for another rock-n-roll noob? My name is Troy. I am a somewhat beginner bass player. My 14 year old son recieved an American Fender Strat and a small Marshall amp for his 9th birthday. Been taking lessons ever since. After about a year, I bought myself a cheap-o guitar and amp with the thought of having my son teach me as he was being taught. If that makes any sense. Well, needless to say, guitar wasn't my thing. That got hung on the wall for a couple years until I traded it and amp in on a new Dean 4-string bass and a used Line 6 Low Down combo bass amp. 12in woofer.

Then about 4 months ago, my 10 year old daughter said she wouldn't mind playing drums. So a new 5 piece Ludwig set was bought and lessons instantly began. Now have all her cymbals replaced with Sabian and Paistie (all used). She is a natural. And not that I wanted to become the new Partridge Family, I bought a Beringer powered PA speaker, a Beringer 12 channel preamp mixer, couple mic stands and a couple mics. Thinking the wife would join in the rock-n-roll fun and sing for us. However, imagine the sound of a cat fight at 3am combined with nails on a chalkboard. That sounds like sweet harmony compared to my wifes singing voice...lol

Anyway, just an ice breaker and small introduction, I will not be a "here today, ask a question, and never hear from me again" type of guy. So, enough about me. Lets see how much you bass guru's know.

Ok, so I bought that Line 6 combo amp. Works great. However, every once in a while when turning it on, the sound is REAL scratchy and the volume is half of what it should be, If you pluck the bass string real hard, the amp will "wake up", so to speak. Once it wakes up, it peforms flawlessly. Only other problem with amp is it sounds great at low volume levels. But get it turned up and it quickly starts to sound like crap. At least to me. The louder you go the worse it sounds. Not blown speaker sound. Its just I lose all the low end frequency sound when I try to play next to the drums and my sons half stack guitar amp.

So, I just bought a Crate BT220H amp head and a Crate 215 cab. Figure this should maintain the lower frequencies at the volume level I want to be at while jammin with son and daughter. However, this amp did the EXACT same thing when I turned it on for the first time. Well, actually, it worked great the first time turning it on. It was after about 3-4 minutes of farting with it, the volume level went to about half. The sound when strumming any string was real real scratchy. Just like my Line 6. So i pluck a string with some force, and amp crackles a bit and "wakes up". Works flawlessly. Son has been playing with it for over an hour now at a pretty good volume level. Not a single indication anything is wrong.

So, my question. Anybody have any similar senerios involving solid state amps? Just wondering if this is something that I should worry about or is this something that just starts to happen on an older amp? OR, could it possibly be my bass? Its a brand new mid priced Dean. Can't see it being this, but you never know.

Thanks in advance to anybody for any info or tips. Much appriciated. Im a pretty tech savy kinda guy. In case I would need to open anything up. Was thinking maybe a can of Dust Off on the inside of the head? Good or bad idea?
 
Ok, that sounds like a plan. Thank you. We got a bunch of cables. Does the cable itself have anything to do with it? Like, do you use a mono cable to go from head to cab? Guitar to head? Or stereo cable? Sorry for being such a noob.

As for trying a new bass, will definitely borrow one. But was at Guitar Center over the weekend. Was messin with a Gibson SG Standard bass. Was love at first feel. I would probably buy it now but really would like to sample a Les Paul bass. I just recently bought my son a brand new Gison Les Paul 60's Tribute for his 8th grade graduation present. Not the studio version. The Standard, with thicker body, better tuners, better pick-ups, in a wine red color. He gonna freak out.

Anyway, Thanks again for the info. Might take a day or so to dig up another bass to try. But will definitely post up any results.
 
Does the bass have a battery ?

If so, try a fresh one.

+1 here if it does. I have that same problem with my ampeg B50R at times but quite honestly, I've picked way to hard for too long back in the day and I just think it goes into thermal shutdown most the time. I think anyway. That's where you push your amp too much than it wants to and it pretty much tries to lower itself in power as to not blow itself up. I'm pretty sure that's what thermal shutdown is. I'm not a noob to playing but I'm definitely learning a whole lot about gear the last 6 months. All because I've actually been buying more gear and TalkBass.
 
Mono instrument (small signal, shielded) cable from the bass to the amp head. Mono SPEAKER cable (heavy wire unshielded) from the amp to the speaker cab (these are two different types of cables).

Ok, Thank you. All my cables are stereo. I have one mono cable. Not sure the differences in shielded or unshielded. And if mine are or are not. Going to the guitar shop where my kids take lessons tomorrow and buy new, high quality cables. For both my sons amp stack and mine.

Is there a big difference in cable quality? Name brands? Im sure there is. Just whats the quick skinny on cable do's and dont's. I know when I first bought cables for my sons guitars and mine, I just bought the cheapest on the shelf. 10 footers. Recently discovered after an equipment rearranging, we are in need of longer cables. I will buy anything needed.

Whats the best? The worst? And the best for an averege guy like me?
 
Plant waves are a good average cable, DO NOT waste the cash on Monster brand cables. Remember you need instrument cables AND speaker cables. :)

Ok, thanks again. Im sure my music guy where my kids take lessons should know the deal. I know he plays in a couple bands and is a little older than I. Has a bunch of different brand cables in stock. Should be a no brainer.

Now, is taking the cover off and using some electric parts cleaner a good idea? This head does have an external fart fan that is used to (I would guess) keep head cool under load. I only say this cause my old desktop computer, with an internal cooling fan, needed to be blown out every so often because of the circulating air brought massive amounts of dust in. Always seemed to operate faster once this was done. Same deal with my Yamaha stereo receiver. Just wondering if peforming this to amp head would be worth the time and effort.

Thaks again.
 
Alrighty then. I got a couple cans of that dry Dust Off left over from my old desktop. I can tell that the guy I bought this amp/cab from has or had a cat. Damn cat fur all over this thing...lol

I can just imagine all the little fury goodies I will find inside when blowing it out. My boy and I have been jammin on this for a few hours now. So far, just the once it did that. Will post up cable selection, dust removal, and anything else I notice asap.

Thanks again.
 
I almost forgot. My amp came with a 2 button footswitch. Think it controls the Distortion channel and Clean channel. Amp came with one real thin, cheesy mono cord. Into the garbage it goes, but don't know if guy was using it as the cable from head to cab or the footswitch.

Anyway, the footswitch itself only has one 1/4" jack on back. Is there anything special about this cord needed? Stereo, mono, shielded, unshielded? Doesn't matter?

Thanks again for helping out this noob...
 
The techs here are getting you sorted, don't have much to add. Wouldn't hurt to take the control cavity cover off the bass and see there aren't any frayed wires/bad connections in there.

Mostly just gotta tell ya.....My first gigs were with our family band around age 12-13 and continued from there. There isn't a better thing out there you could be doing for your kids, man. Way to go and keep it up.
 
The techs here are getting you sorted, don't have much to add. Wouldn't hurt to take the control cavity cover off the bass and see there aren't any frayed wires/bad connections in there.

Mostly just gotta tell ya.....My first gigs were with our family band around age 12-13 and continued from there. There isn't a better thing out there you could be doing for your kids, man. Way to go and keep it up.

Thanks bro. Much appreciated.

As a father who loves music, I tend to go a little overboard when it comes to my kids. What other "average" 13 year old kid has an American Fender Strat, Schecter Omen, and a yet to be recieved Gibson Les Paul (Party next weekend. He gets it then). A Crate GTD65 combo amp and a Crate GT1200H half stack. All stuffed into his little 12x14 bedroom...lol He makes it work.

Havent had a chance to pull cover off yet to do a visual inspection. Or blow out head unit and do inspection on it. With the big party next weekend, and I working 10-12 hour nights on 3rd shift, there hasnt been much time for me to mess with it. Wife has me busy installing 2 new storm doors, cleaning the garage, yard, etc... There just isnt enough time

Was just jumping on to update a cable selection I made to another guy here earlier in the post. See if he heard ever of it. And to ask another noob question.

Anyway, Thanks again.
 
Is the amp you're using for bass a bass amp, (?), or a Line 6 guitar amp(?). I ask, because if it's a guitar amp, you'll kill the spkrs with a bass pretty easily. And +1 to being sure you're using speaker cable for the Crate rig. Best of luck.

Yes, both my amps are Bass amps. The Line 6 LowDown and a Crate BT220H.

And not that I would or want to, but you are not supposed to plug a bass into a guitar amp or damage may/will occur.

Can you plug a regular guitar into a bass amp without risk of damage? Just wondering.

Hate being a 40 year old noob...lol