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it depends on the type of enclose you are building and number of drivers .. you can build them and share air space or build it to were neither sub shares any air space.. if you buy a prefab enclosure for your 15s what ever q logic or q power or any other manufacture choses to build a universal port or vent or sealed box will be just fine. which type of enclosure are you looking for .. port vented seal isobaric
Hello! The required voltage is 24 volts...which means two 12 volt batteries connected in series...It sounds as if you have two 12 volt batteries connected in parallel...Which doubles the amps and leaves the voltage at 12 volts...Connect the negative of one battery to the positive of the second battery...Then from the positive of battery #1 to the negative of battery #2 is the required 24 volts for the Kole...Guru...saailer
With a single 4ohm DVC sub there are only two possible wiring solutions, parallel the voice coils for a final 2ohm load or series the voice coils for an 8ohm load. In your case, you want to wire them in parallel, both positives and both negatives connected to the amp terminals.
Here are the diagrams: (-) to (-) and then to the amp - (+) to (+) and then to the amp. Impedance = 2ohms.
The Audio Control unit is a considerably better built unit. PC boards are millitary spec. Thick and hearty! will not self destruct like alot of chinese stuff... The epicenter is a phenominal piece of electronics for anyone who loves bass as well as Rock. older recordings lack the intensity in the lower end response by comparason to todays "pop" music. A suggestion though, if you listen to Rap, this unit will cause your sub to over excurt and wear out quickly if not blow. I can't really speak to the Soundstream unit. I was a Soundstram Dealer when it was still a US company. All that's left of the original product is the name. Hope this helps
Most common for all car Stereo wire color coding are:
Solid RED wire = +12V Solid Black wire = negative ( - ) Solid Yellow wire = +12V (power ON /OFF) can add additional toggle switch for switching on and off the car stereo
Solid blue wire = Power antenna
the rest of the wires are for car speaker having positive and negative polarity. note: for the speaker connection wires, all the solid colored wires are positive side (+) of speaker. those solid colored wire with stripe black line are for negative side (-) of the speaker