How do you wire a qx500.1d to get 1 bridged channel. a shop connected just to the left channel. i thought it needed to be positive from right and negative from left to bridge. i am using 1 fosgate r2d2 10.

SOURCE: bridge subwoofers

Without looking up the individual specs of your speaker and amp, I'll offer a few basics when it comes to bridging an amp.
Most important...find out what impedance (ohm) that your amp can handle bridged!! If you go below this rating, you will run the risk and most likely eventually overheat and short circuit the amp. You must also know the impedance of your sub (which can come in a variety) to be able to match them. Depending on this impedance match-up, it may be less beneficial to bridge the speaker to this amp. For example if there is an impedance mismatch you'll either get less power from the amp or short circuit the amp. If you know these I can help you come up with the best solution.
If you know bridging is the best option, then you'll have to know which terminals on the amp to use in order to bridge. This is how it normally works. On a 2 channel amp...you would normally take the positive from one channel to the positive on the speaker, and the negative from the OTHER channel to the negative on the speaker...and this is how you bridge the amp. The other two channels would remain UNCONNECTED. BUT!!! you have to make sure you use the correct 2 channels...it varies from manufacturer. But take heed not overload the amp...and not to overpower the sub. There are a few different ways that you can configure the subs if you find it beneficial to bridge your amp, these would take long to explain and would depend on the impedance of your subs and specs of your amp...these wiring configurations is how you match the impedance of the speakers input to the amps output (and is very important to do correctly) Look up "parallel and series" wiring configurations. Let me know if this helps, or if you need further help. Find out the impedance of your subs and the specs of your amp and i'll be able to assist you more. Hope this helps.

Justin Duby

• 370 Answers
• Posted on Feb 06, 2009

SOURCE: Rockford Punch HE2 wiring question.

if your sub will handle it, bridging it will give you more power. The best thing to do is to find out how much power the amp puts out ( RMS ) and if it is in your power handling range bridge it. It sounds better and gives you a harder punch because of more power.

Josh Whitehead

• 1148 Answers
• Posted on May 17, 2009

SOURCE: Subs positive negative polarity help

if its color coded,,red is positive and black negative,,,if not hook one up and watch the speaker while playin music,,, if its moving in and out its correct,,if not wrong

SOURCE: CAN PYRAMID PB-772 BE BRIDGED

i cant find a whole lot of information on that amp or any other older pyramid as they arent exactly the most popular amp but just applying what i know about amplifiers in my opinion i think the amp is more than likely only stable @ 4ohm when it is bridged and @ 2ohm in stereo (using both channels) so yes you should be more than likely able to bridge it because the impulse only came in 4 and 8 ohm voice coils and i dont think they made a dvc impulse so check the sub paperwork . if you dont have the paperwork look at the sub and check for it or get the model number and ill be able to tell you what the ohm rating is on it and remember if u decide to bridge it be carefull not to turn the gain up like it is the volume controll. it should typically be set under half way but you maybe ok going up to 3/4 but i am not sure how it will sound @ that level so if its not loud enough after that you should consider getting a slightly larger amp ( a good rule of thumb that i have found is that the subs rms specification should only be 2/3 of the totall rated rms output at the ohm load that the speakers or speaker are as this should allow u all the spl you want without really heating up your amp and if u ever buy new subwoofers you have more power left in the amps output capabilities because when u buy new subs it is usually to upgade in quality which usually requires more wattage and youll have it

sorry my answer is so long . if u have any problems pls feel free ask me
and again you should be very capable of bridging it just find out the ohm load for the impulses voice coil HOPEFULLY it is an 8 ohn because when bridging an amp it halves the ohm rating on the sub




sorry such a long answer but i just wanted to cover as much as i could in case you have any problems if u have wiring questions or want to see a wiring chart go to www.the12volt.com for all kinds of excellent information charts wiring wizards and here is the link to the subwoofer wiring wizard
http://www.the12volt.com/caraudio/woofer_configurations.asp


thanks for letting me try to help out and god bless

SOURCE: jl audio w7 13 subwoofer system 3ohm driver bridge it 2 ch amp

How much is your speaker max wattage?
If it is 750 or below, it can only be used on one channel, either the right or the left.
If speaker can handle 1500 watts then hook the positive speaker wire to R+
Hook black negative speaker wire to L-

Now it is bridged