Possible Problem with Roland Cube 30X

NewtoyLPVM · 09-27-2007, 07:57 PM

Good day. My amp has developed a hum when a guitar cord is attached. It disappears when I touch the metal part of the cord. Its also there when there is a guitar attached and disappears when I touch any metal part of the guitar. I have replaced the cord and the hum is still there. I tried my guitar with my friend's amps and no hum, so it's not the guitar and not the cord. Maybe it's operator error? What's the ideal volume, gain, etc., setting for practicing at home. Thank you so much.

MIDNIGHT · 09-29-2007, 11:36 PM

Quote:

Originally Posted by NewtoyLPVM

Good day. My amp has developed a hum when a guitar cord is attached. It disappears when I touch the metal part of the cord. Its also there when there is a guitar attached and disappears when I touch any metal part of the guitar. I have replaced the cord and the hum is still there. I tried my guitar with my friend's amps and no hum, so it's not the guitar and not the cord. Maybe it's operator error? What's the ideal volume, gain, etc., setting for practicing at home. Thank you so much.

hmm..

good question newtoy

sorry i don't know the answer though..

.. happened to me with my amp back in the Philippines.. it's broken now..

.. i was just careless.. knew nothing about amp settings, etc.. basically, when i wanted it loud then i'd just turn up without restraint.. not a bright idea

lp59aholicDon · 09-30-2007, 12:21 AM

Quote:

Originally Posted by NewtoyLPVM

Good day. My amp has developed a hum when a guitar cord is attached. It disappears when I touch the metal part of the cord. Its also there when there is a guitar attached and disappears when I touch any metal part of the guitar. I have replaced the cord and the hum is still there. I tried my guitar with my friend's amps and no hum, so it's not the guitar and not the cord. Maybe it's operator error? What's the ideal volume, gain, etc., setting for practicing at home. Thank you so much.

sounds like a possible ground problem somewhere in your amplifier, does it have a working three prong plug? increase in gain settings may make it even louder yet

NewtoyLPVM · 09-30-2007, 06:02 PM

Quote:

Originally Posted by lp59aholicDon

sounds like a possible ground problem somewhere in your amplifier, does it have a working three prong plug? increase in gain settings may make it even louder yet

You're probably right. It came with a two-prong plug and the hum increases as you turn the volume up.

coldsteal2 · 10-01-2007, 12:31 AM

just turn the power plug around and it will reverse the polarity

lp59aholicDon · 10-02-2007, 04:23 AM

Quote:

Originally Posted by coldsteal2

just turn the power plug around and it will reverse the polarity

Possible also in handling or moving an internal ground wire has come loose or broke
another thing that can give you alot of hum in high gain amps is if you are playing under flourescent lighting

LoKi · 10-04-2007, 01:21 PM

Have you ever bent or moved the cord violently while it was plugged into the amp? An input jack is made out of cheap, cheap metal and if its not getting a solid connection, could cause a buzz or hum.

Most often the source of hum in an amp is electronics around or on the same circuit as the amp, lighting, or the guitar itself. But input jacks are CHEAP if thats all it is, and can be replaced in about 5 minutes with a soldering iron and a screwdriver and a pair of pliers.

09-27-2007, 07:57 PM	#1 (permalink)
NewtoyLPVM Senior Member Join Date: Sep 2007 Location: Pacific Northwest Posts: 305 Thanks: 0 Thanked 0 Times in 0 Posts	Possible Problem with Roland Cube 30X Good day. My amp has developed a hum when a guitar cord is attached. It disappears when I touch the metal part of the cord. Its also there when there is a guitar attached and disappears when I touch any metal part of the guitar. I have replaced the cord and the hum is still there. I tried my guitar with my friend's amps and no hum, so it's not the guitar and not the cord. Maybe it's operator error? What's the ideal volume, gain, etc., setting for practicing at home. Thank you so much.

10-01-2007, 12:31 AM	#5 (permalink)
coldsteal2 Rock Star Join Date: Sep 2007 Location: Chico, CA Posts: 16,868 Thanks: 187 Thanked 56 Times in 14 Posts	Re: Possible Problem with Roland Cube 30X just turn the power plug around and it will reverse the polarity __________________ ...........Cold Steal II Soundclick Songs ................. ColdSteal2's YouTube Videos.............MusicMight Secret Service . Still Rockin' at 56 .

10-04-2007, 01:21 PM	#7 (permalink)
LoKi V.I.P. Member Join Date: May 2007 Location: Calgary, Alberta Posts: 5,794 Thanks: 109 Thanked 18 Times in 7 Posts	Re: Possible Problem with Roland Cube 30X Have you ever bent or moved the cord violently while it was plugged into the amp? An input jack is made out of cheap, cheap metal and if its not getting a solid connection, could cause a buzz or hum. Most often the source of hum in an amp is electronics around or on the same circuit as the amp, lighting, or the guitar itself. But input jacks are CHEAP if thats all it is, and can be replaced in about 5 minutes with a soldering iron and a screwdriver and a pair of pliers.

Thread Tools
Show Printable Version Email this Page
Display Modes
Linear Mode Switch to Hybrid Mode Switch to Threaded Mode

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
Roland Micro-CUBE	FLICKOFLASH	The Squawk Box	40	07-02-2008 04:53 PM
VOX AD30VT vs. Roland Cube 30X	jetsfan420	The Squawk Box	9	05-03-2008 03:40 PM
Just got my Roland Micro Cube	Doctor Dread	The Squawk Box	8	03-31-2008 03:52 PM
Vox Valvetronix vs. Roland Cube series amps	needlespauls	The Squawk Box	3	01-25-2008 04:16 PM
My next new amp, Roland Street Cube	Harpozep	The Squawk Box	6	12-08-2007 01:30 PM

Today
Les Paul	Sponsored Links __________________ This advertising will not be shown in this way to registered members. Register your free account today and become a member on My Les Paul Forums