I have a b415 dsp speaker that I pulled apart due to a rattle in the driver. I need to confirm the correct wire color to the speakers. I believe the red and black went to the driver and the blue and yellow went to the woofer. Please confirm. Also is the black and yellow go to the negative's? Thanks for your help

Yes, but you need to replace the entire speaker. The 1505 and 1508 use a different magnet though they look similar..

Hi,

Please specify a bit more, does the rattle is physical(Enclosure structure) or electronically hear thru speaker(Power Amp Common Issue)? I have the solution for the amp issue, let me know.

usually with a blown speaker you will get sound but it sounds like there is an abundance of paper very loose on the speaker, so if there is no sound at all try taking the box apart if you are familiar with stuff like this and check to see if there are any loose wires or blown capacitors

Solid state amps are very subject to blowing out the output transistors if speaker leads get shorted. Take it in for repair.

The noise MIGHT be a resonance in the cabinet. The way to find out is to sweep a frequency upward to see if something rattles at certain frequencies... Don't be surprised to find several. Within the cabinet are the usual culprits: Wires rattling against the cabinet, loose debris, grilles and the logos on them, circuit boards with crossover hardware, cabinet wood that is not glued and rattles against itself. Things like bass port tubes can rattle.
Find an audio generator and sweep the cabinet from 50Hz to 10KHz and you will be surprised. Some speakers may have resonances as well. Expect things in your room to start rattling as well.
This is really the only way to find the problem. PLEASE wear hearing protectors at levels above 90Db.

First thing is to test the horn as the crossover circuit may be the problem. If you need the part(s) for the crossover you can get them via DIgiKey.com, however repalcing the horn driver you may have to go through FullCompass.com and if the part has to come from Behringer it takes months.

Did you have this speaker AND the device that drives it connected to the same power source? If run by a mixer you MUST run a power extension from the same place your powered speakers are powered to the mixer. Ground bounce due to wiring in a building can destroy input circuits due to ground faults and static discharges. ALWAYS use balanced lines either XLR or TRS cables to interconnect the audio.

Also verify your power receptacle is properly wired. Carry one of those plugs with the indicators showing receptacle is wired correctly. Don't plug anything in until you verify it. Some venues are noted as having bad electical service.

Let your speaker sit for a minute and repower it... sometimes they have a lockout that takes time to reset.

The cabinet is listed as a 4 ohm unit.

We would exoect to see four, 4 ohm speakers in series parallel or four 16 ohm speakers in parallel.

If teh unit seems to rattle, first put an audio oscillator into it and sweep the frequency. It is common for grilles and also logos attached to them to rattle.

Open the unit and power each speaker the same way individually for a test.

I suspect you will find either the grille or mounting hardware is actually doing the rattling OR possibly the wires inside are vibrating.

If the sound is a scratchy buzz, then the speaker(s) have probably had voicecoils damaged by overheating.

In this case, buy 4 new speakers and replace all. It is not likely to find replacements for the Buggera brand they put in these cabinets. Also the word on the web about that brand of speaker is not very good.

When you are changing the DSP effect on the fly, static or noise is NORMAL !!! The DSP is changing the data and having to recalculate on the fly and doesn't mute itself while doing so which results in "garbage sounds out".

The bypass setting should NOT get any tone UNLESS you have feedback going on. If your guitar can "hear" the speakers in the amp, the strings can vibrate and get feedback going.

Unplug the guitar and see if high freq tone is still there on bypass. If the tone is in the musical range, then there is a problem if nothing is plugged in. If it is a VERY weak, very high frequency tone, this may be the digitizing noise from the DSP. On bypass, the audio is likely to still go through the DSP, just not be modified by it.

The speaker can be purchased from Mackie directly. Follow the link below to go to the support page and continue from there. I would call them with the specifics of your unit to get the correct replacement driver. It is common for different serial numbered units to use different drivers. They can confirm this when you call. I have dealt with them many times and have found them to be very helpful and prompt for parts delivery.

Dan

Link: http://www.mackie.com/support/index.html