Hi! do you have som facts about subwoofer case to VISONIK V125S?=)

Visonik V129D4 V129 D4 12 Dual 4 ohm Car Subwoofer

What's the problem????

Hello sir hi, the black wire is standard color for ground. if you are wiring a speaker, the wire is really not that sensitive, interchanging the wire only makes the sound drop to about 2%, barely not noticeable.

this is a dual voice coil sub. either have a 2 channel amp hook up to it. or have your mono amp have to sets of wires going out of it to your 2 connections. i dont suggest it but i have had one connection hooked up at a time played it when it blew hooked up the other connection as a back up. just make sure you have the right watt level for each voice coil.

Hello dylanholick,

Visonik is somewhat low-end car audio and band pass enclosures in general usually produce rather muddy and boomy bass. It will probably sound "bad", but not hot, and not cool.

If you aim is a good self-contained system with amp, sub and enclosure all in one, why not consider an Infinity Basslink, MTX Thunderlink, or perhaps a Bazooka. They're all available at www.crutchfield.com for little more than you'll pay for the Visonik and any of them will definitely sound better.

Hope this helps.

no you cant just use any subwoofer box you have to buy the box made for jeeps or you will lose all you bass

if you have rca's coming from the back of your head unit, you do not need the high level input harness.

Please see my info request.

Here is a link to visonik to download manuals.
http://old.visonik.de/en/downloads.php

If you let me know your model number of the sub, vehicle make and model, and brand and model of headunit or CD player you have then i can provide wiring color codes, recommended wire routing locations, etc...

Sounds like the voice coils are cooked...try testing each speaker with no wires to them...use a multi-meter on set on ohms/resistance, low scale...should read either 2,4 or 8 ohms, no reading or very high reading means sub is shot.