- Technical support from FUSION Electronics
I have installed a new set of speakers and there is no bass. Have I done something wrong?
One of the most common causes of lack of bass from speakers is out of phase wiring. This occurs when the positive and negative wires are connected incorrectly. The positive and negative wire connection at the source must be the same at the speaker connection.
Check the connections for consistency firstly.
Another clue to this fault is that the bass will sound louder outside the vehicle than inside.
Most speakers will have a positive + sign and/or a negative — sign on the terminal, some have a red mark for positive and/or a black mark for negative. If in doubt there is a relatively simple way to check the phase of the wiring. Using a 1.5v or AA battery hold the positive and negative wires connected to your speaker on the relative terminals of the battery, if in phase both speaker cones will move outward but if one is out of phase the cone will move inward. Both speakers must move in the same direction when tested.
I have installed a new set of speakers and they sound distorted and crackly, what could cause this?
A common installation error we see that results in these symptoms is when the speakers are mounted in the vehicle and the mounting holes are drilled with the speakers in place. When the drill bit is withdrawn from the hole the material that has been removed (metal or wood etc ) can drop into the speaker and/or voice coil resulting in speaker failure. This is not covered under the product warranty. Always use the provided template to pre drill the mounting holes.
Another cause of distortion or crackling is a burnt voice coil which is a symptom of overdriving the speakers or delivering a clipped or distorted signal to the speakers from the source unit or amplifier. You may be able to smell the coil is burnt or by gently applying even pressure depress the cone of the speaker and you will feel if the coil is rubbing or binding.
Mounting speakers on an uneven surface can also twist the frame out of shape and cause the voice coil to rub and cause permanent damage.
Insecure wiring or poor connections are common causes of crackly or distorted sound from speakers. Check all wiring.