If you're only using 1 speaker/sub, you run it in Mono. Hopefully these points have cleared up some of the misconceptions about using subwoofers in 2-channel systems. This article has been viewed 228,454 times. What are the disadvantages of bridging one or more subwoofers to an amplifier? Normally, your 2 channel is running at 4 ohm for each channel. Hi i have a sony Xm-2100GTX Two Channel amp that i want to bridge for one sub wich is a JBL GTO1202D what would be the best way to do this. You’ll have one going from the switch to the stereo and one from the amp to the stereo. Hi, i am looking to buy a 2 channel bridgable amp that is rated and i assume only stable at 4ohms. This should be indicated on the documentation pamphlets that came with the amplifier, or the amplifier itself. 1) Run the speaker wire from your amp to the sub, then another set of speaker cables to your speakers. 6 + 8 = 14 Ohms 3) Divide the top by the bottom to find your total impedance. Once you have the amp set in bridged mono, you will need to connect the positive and negative speaker wires to the two positive(red) posts on the rear of the amp. Most car stereo amplifiers can do 2 ohms. This article was co-authored by our trained team of editors and researchers who validated it for accuracy and comprehensiveness. Connect the red speaker wire to channel 1's positive terminal. This allows for more power (watts) to be sent to your speaker(s). To bridge the amp, connect the subwoofer or bridged speaker positive (+) terminal to the positive amplifier bridged terminal label, and the speaker negative (-) terminal to the negative bridged amplifier terminal also. If you are wiring the coils in series then run a wire from the positive terminal of the first coil (the one wired to the amp) to the negative terminal of the second coil and from the negative terminal of the first coil to the positive terminal of the second. Now if i get a 4ohm single sub and bridge the the channels (positve from channel 1 & negative from channel 2) will that make the amp run @ 2ohms per channel and therefore be unstable? Where Z is the impedance of a given speaker. Bridging the channels increases the power output. Bridging a four channel amplifier is no different than bridging a two channel amp. Locate the four terminals where the speaker wire hooks up to the amp; there will be a positive and negative terminal for each of the two channels of the amp. 2 speaker-level inputs. By using our site, you agree to our. Regardless of where the amp is getting its’ remote turn-on voltage, this will allow you to turn the amp off while still playing the radio. If you are wiring the coils in parallel then run a wire from the first positive terminal to the second positive terminal and a wire from the first negative terminal to the second negative terminal. Do the same with channel 4 now- remember to have the setting into 4channel mode. On your four-channel amp, you should see 8 terminals: channels 1 through 4 each have a positive (+) and negative (-) terminal. We use cookies to make wikiHow great. Eitel's health blog, PromoteHealth.info, has become an authority in the healthy-living niche. if an amp is bridged at 4 ohms, it is the equivilant of running both channels at 2 ohm individually. Best to bridge amplifers that are specifically designed for it. Step 2: Now, move the screw of terminal 1, the first channel anticlockwise. An amplifier is usually bridged to combine two channels to power one subwoofer, or to combine four channels into powering two subwoofers. Hook Up My Bose Wave to My Panasonic Viera→, Hook Up an Optical Cable to a Bose Companion 5→. The sub will suck nearly no current from the signal (so your mains will still get almost all the juice), expensive subs have nice crossovers you can use in this configuration. If your amp supports a 2 ohm load to the mono channel then wire your Voice coils in parallel then hook it to the mono channel. Experts recommend using two identical subwoofers for optimal sonic quality. Your amp is rated at 250w 4ohms bridged. Preparing to Wire Your Subs to a Bridged Amp, {"smallUrl":"https:\/\/www.wikihow.com\/images\/thumb\/7\/7b\/Bridge-Subwoofers-Step-1-Version-4.jpg\/v4-460px-Bridge-Subwoofers-Step-1-Version-4.jpg","bigUrl":"\/images\/thumb\/7\/7b\/Bridge-Subwoofers-Step-1-Version-4.jpg\/aid1390341-v4-728px-Bridge-Subwoofers-Step-1-Version-4.jpg","smallWidth":460,"smallHeight":345,"bigWidth":728,"bigHeight":546,"licensing":"