I bought an Orange CR35LDX combo amp last week along with a new Cort guitar and a new Ibanez guitar cord (cable). When i plugged it in my room to try it out, the amp produced a weird humming sound. When i turned on the overdrive it was worse. So i called the shop i bought it from and he tested it in the shop, it was crystal clear plugged in my guitar with my cable. So why is it producing such a wird sound when i plugged it in my room. This is definitely not due to the guitar, cable nor the amp, must be something related to the curcuit. Can u please advise me on this. Thanks in advance.

i believe you need a 1/4" unbalance plug for the amps input. Basically a guitar cord. If I am understanding the question. ? or if you want to know the actual "input jack",Maybe it is lacking or missing? than that would be a "1/4" unbalanced input jack". good luck, I hope this helps.

This bass was made by Cort in Korea, in Jan 2004. They sell used for US$150-250 depending on condition.

Wiggle the headphone plug while plugged in to see if there is a difference. The socket may be dirty or sticky.

Many try to use poor quality guitar cables and have the problem. The sleeve of the guitar cable plug turns on the battery in the guitar. Always loop the guitar cable through your belt or the guitar strap to avoid the cable wisting the plug in the guitar causing noise and WEAR that wears the plug sleeve to the point it no longer will activate the guitar.

You put the pedal where???? The guitar goes through the pedal. This is NOT to be used in an external effects loop of an amp. The signal levels are wrong as the effects loop is LINE LEVEL and the pedal is for instrument signal levels. Move the pedal to before the inout of your amp as it is designed to be used.

Hi,

This would only mean two things:
1. you have a bad capacitor in the circuit or the grounding on the circuit is broken and not filtering the obvious line noise from the circuit.

2. You have what is called, dirty power. That is when you have some kind of electrical device plugged that generates line noise which can be even a florescent light as they generate line noise.

Please take the following steps to narrow down the issue.

Take your setup and plug it in some where you know others can setup their rigs and it is using clean power. If, the humming goes away then it is dirty power where you originally setup.

If, it is still humming then you will need to take your equipment to a qualified marshall dealer have them look at it.

Yes, there are several possibilities. First thing is to disconnect your guitar and then plug in the cord to the amp. Expect a bit of hum. If it screeches, then problem is not feedback via the guitar. If it doesn't MAYBE your guitar is "hearing the amp" which the guitar is then a microphone and can feedback. Moving the cable generates electrical noise which can trigger the feedback to start.
If you get the screech without the guitar connected, then TRY a new guitar cable. Make sure it is an INSTRUMENT cable... I have seen some try to use speaker cables or junky 1/4 inch cables intended for home stereo... these will NOT work and can cause the feedback. The next possibility is a broken jack on the amp. This would require repair. The common cause of this is to fail to run the cord through the handle of the amp... one trip on the cord or step on it pulling the plug sideways in the amp and the jack is broken and it is a trip to the shop as well. While on the subject ALWAYS run the cord at the guitar end either through the strap or your belt loop. Cords left dangling keep rotating and soon wear out the plug and also the jack in the guitar and then that has to go to the shop.

Since this is a brand new amp right out of the box, I would recommend returning it immediately to the dealer you bought it from. If it can't be repaired under warranty they might replace it with a new one.

Unfortunately, the correct action here is to return the unit for a replacement one. Any attempt to repair this will void the warranty. Since you just purchased this today, the store should not give you any trouble and just exchange the unit. If you need to, insist on an exchange rather than waste time on a warranty repair.

Good luck,

Dan

Assuming that the amplifier is functioning properly, I suspect that the problem is either in the cord, the plug socket on the bass, or the volume control potentiometer. First, I would try another cord that is known to be in good condition (ALWAYS plug the cord into the instrument FIRST). Second, carefully remove the cord receptacle plug from the bass and examine the solder joints (check for loose wires). Third, carefully remove the plate that holds the volume and tone pots. Examine these controls for loose wires or faulty solder joints. CAUTION: If solder joints are found to be the culprit, care must be taken to correct this problem. If too much heat enters the pot, it can be ruined!