As an Amazon Associate We earn from qualifying purchases. ALWAYS VERIFY BEFORE ATTEMPTING TO BRIDGE AN AMPLIFIER! Connect two speakers through the fifth terminal and eighth end of the fourth and third channels. Tractor-trailer brought upright after dangling over off-ramp near I-79. WebCan you bridge a 4 channel amp. If so, youll be glad to know theres a work-around that Ive come up with that will let you wire your 4 speakers up without damaging your amp. So by bridging the amplifier in this example, we can get close to 200W yes 2 TIMES the normal available power when in bridged mode, depending on the connected speaker. That should be enough in most cases: Not totally silent in the rear, but most of the volume will be towards the front speakers. Choosing the right 4-Channel Amp is important if you want to enjoy the full potential of your speakers. If the Amp is not bridgeable, you should consider hiring a professional to do it for you. You can bridge one sub and speakers to a 4-channel amplifier. System 2: 2 speakers in parallel to each front channel = 2 Ohms x 2 + 1 subwoofer wired for 4 or 2 Ohms on the rear channels bridged for more power. Welcome to my world Won't you come on in Miracles I guess Still happen now and then Step into my heart Leave your ca It is not possible to perform bridging on a non-bridgeable amp. Ive used some like these over at Amazon. In normal use with 1 speaker per channel, you wont notice a difference as theyre wired normally and have separate audio signals. A passive crossover for a subwoofer is hard to find, bulky, and doesnt work as well as a built-in electronic low pass crossover. Modern car amps are designed in a way such that all 4 inputs will get the same signal and there wont be any problems. Do not attempt to bridge an amplifier that is not marked as being bridgeable. car stereo to a 4 channel amp, Additional suggestions & parts you may need. Web23 likes, 0 comments - Melodia Musik Surabaya (@melodia_sby) on Instagram on April 8, 2020: "SUPER SALE PRO AUDIO !!! Special Disc. Check your Amplifiers manual or contact the manufacturer if you arent sure what type of cable you need. WebHow to Bridge a 4 Channel Amp. This includes both for normal stereo usage as well as a rating for bridge mode too. Using these will allow you to keep the total speaker load (speaker Ohms the amp sees) to a safe level so the amp wont get damaged. Make sure you form a secured connection without leaving loose wires. In case you dont have the user manual, a quick internet search including the model number should suffice. We can find the power using this formula: Power (W) = (Volts x Volts) / Ohms, or P = V^2 / R. So (14.14)^2/4 = 50W for each amplifier channel. Verify if it is feasible by reading the user handbook. > the kids have a high rating should i freq set in middle? If you have one and about to start bridging it, here is the procedure for you. If you are using a load lower than the minimum level, it can make your amplifier hot and even result in permanent damage. You will need a 4 channel amp to run 2 speakers in bridged mode. This meant having more power available at my disposal and more flexibility even if I changed my speaker setup later. However, you should only connect two speakers to each channel. In this post, I will show you how to bridge a 4-channel amp into a single channel to maximize the power output. You need this stuff to hook up the screws attached to your amplifier. Adding a single subwoofer to a 2-channel amp is also possible. It is always better to pre-prepare to successfully bridge the 4-channel amp to a subwoofer. Look for the diagram near the speaker connects to see how yours is bridged. In that case, youll want to look at the 4-channel amps on the market, which allow you to easily switch between the different channels, which is helpful if you have to play different instruments in the same song. 2 Dec, Last Updated on Pick up the owners manual and carefully read through it to understand the connection process. in bridge mode: 40 V / 5 A = 8 Ohms. Some Important Things You Must KnowBridging may seem complicated but it is easy once you know how to do it. Do effective research on which amplifier is There are plenty of detailed diagrams to guide you, too. Bridging an amplifier cuts the resistance load (measured in ohms) in half, which can cause it to overheat. Try this out and bridge you amplifier your own. You may need a few extra parts. Be sure to check your manual (or the manufacturers website) to see if once connected to a speaker, whether or not your amplifier can function at half the ohms it currently uses. (Assuming the amp is designed to support that much power output). If the Amps maximum load capacity is less than this, the speaker load will be too high. Adjust the volume of the destination unit until it is at a comfortable listening level. To keep it simple, Ill summarize what will work for almost all systems & amplifiers youll come across. Plug in the 4-channel Amp and turn it on. A screwdriver for tightening screws in the amp. We and our partners use cookies to Store and/or access information on a device. The question is assuming I have the same set up for front which is my true intention I dont mind leaving current front speakers to radio. As a small thank you, wed like to offer you a $30 gift card (valid at GoNift.com). Thats important because amps are designed for a certain minimum speaker load (Ohms rating). Sorry! Thats because for blown speakers the voice coil no longer has a complete electrical path you can measure. You can use an L-pad (speaker volume attenuation) site like this one to calculate resistor values for you. This eventually brings more power to both channels. In turn, the Amplifier added to the original can be used to enhance the Amplifiers power output. Be sure to touch bare metal on the terminals and make good contact. You get extra power from doubling the load (2 ohms). The rating shown on the amp or in the owners manual serves as a warning. On other amps, the first 2 channels may be labeled front channels while the last 2 channels are labeled rear channels.. One of the best ways to double up your amps output and supply more power to your subwoofers is Bridging. Whether you have one subwoofer, two subwoofers, or multiple subs, you can bridge your channel amplifier to enjoy an amazing sound experience. 5 Apr, Last Updated on Dont do it! Once the wires are secured, the first speaker is connected to the amplifier. And be sure that the coil is within the range your amp can handle. Next, make sure that both your Amp and sub are properly grounded. 1. If they are not bridgeable, you have to get them replaced. 3 Mar, Last Updated on Bridging is a special feature in car amplifiers which lets you get the maximum amount of power they can produce by using a built-in channel-sharing design. Ill recommend that you just bridge two outputs to the one subwoofer and leave the other two channels. You will need to adjust the gain settings of the two channels to accomplish this. Unless you are an expert, it is a good idea to check your owners manual or search online before you start. The head units left channel RCA jack is connected to the left front and left rear amp inputs. You can't unless you have a dual voice coil sub and put each coil per 2 channels bridged which I don't recommend because the gain setting has to be exact. Two subwoofers can add a lot of bass to your car stereo system so you can enjoy your music even more. The terminal system is also the same. The general range will tell you the Ohms rating of the speaker (Example: 3.6 ohms resistance would mean a 4 ohm speaker), Leftover solder flux or solder coating from manufacturing, Heavy dirt, dusty, or other contaminants that build up over time, Paint or other coatings that dont conduct electricity, Buy another small amp just for the subwoofer/subwoofers, Run one small subwoofer from each of the rear channels. Connect the speakers RCA cable to the positive terminal on the Amplifiers left side. Before that lets delve into some vital details. It is a popular amplifier in recording studios, live performances, andcar audio systems. There are a few benefits to bridge-amping an amp. In bridge-amping, an additional amplifier is added between the source and the speaker to increase the Amplifiers power output. A wire stripper for separating the wires edge before placing it inside the amplifier. Close up of a modern typical car amp with built-in crossover features. Finally, tighten the screw clamp of terminals using a clamp and secure the wire properly. Web35 likes, 0 comments - Electrohub (@electrohub_kenya) on Instagram: "The is designed to offer high-quality whole ho" Normally, an amplifier may consist up to 4 channels. To run that comp. Read on to find out how! They provide the information you need to get the system up and running in no time. Nevertheless, it isnt worth going through all the stress. Connect the speaker outputs of the Channel Amp to the speakers. Partly due to tradition in the electronics world and partly due to various other electrical reasons car stereos are commonly rated at 4 ohms and home stereo speakers around 8 ohms. wikiHow is where trusted research and expert knowledge come together. If you truly have a 4-channel amp, you should see eight terminals on it a positive terminal and a negative terminal for each channel. 4-channel amplifiers provide extra power to speakers in live performance settings and can be used to boost individual channels in stereo or multi-track recordings. You can still enjoy the music you love with a nice-sounding 4 speaker + subwoofer system. 10 Apr, Last Updated on If it requires more power, you can adjust the crossover settings again. As I mentioned above, most car amps today can handle a 2 ohm load per stereo channel (left & right channels) and 4 ohms minimum when bridged to drive an amplifier (called mono). Remove the screw holding the amplifier terminal, then insert the wire between the top 5 Mar, Last Updated on Connect the source unit (Amp) and the destination unit (Speakers) together using cables. document.getElementById( "ak_js_1" ).setAttribute( "value", ( new Date() ).getTime() ); I'm a car audio fanatic and professional electrical engineer. Once the speakers are hooked up, there will be a switch marked Stereo, Mono, or Bridged. Last Updated on Thats because each speakers design is a bit different from the next. To get high-quality sound from your cars subwoofer you must separate high-frequency vocals and music from entering into the sub. Youll need to pick up some 15W-20W (or higher) resistors. It is not possible to bridge some amplifiers manually because they are internally bridged. For instance, you need speaker cables when connecting a speaker to an amplifier. Consult your However, if we add one 4 ohm power resistor in series with each speaker we can use the math to our advantage. Do Subwoofers Get Louder As They Break In? 29 Mar, Last Updated on It is also possible to check the Impedance of a 4-Channel Amp by referring to the specifications provided by the manufacturer. (Click to enlarge or click here to get the Adobe .pdf file you can download and print). For instance, a bridge is used when connecting a high-powered amplifier to a low-powered amplifier. Set a low-pass filter dial to the maximum level. Multimeters show an open circuit condition as infinite Ohms, which just means theres no reading to be made. Your amps must be compatible with the stereo system and with each other. I am using the speakers in ohms settings to get the full dynamic range. Hello Bill. A stereo amp may convert to a mono (bridged) amp, a four-channel amp could be converted to a two-channel bridged amp, and so forth. Set this to Bridged. Manage Settings So, in short first, locate the 4-channel amps input wiring harness. Read more . Speaker wires to connect the terminals to the amplifier. Our first choice for connecting four speakers to a two-channel amp is to use series wiring. You may also consider purchasing an aftermarket receiver that provides additional channels for amplification. To help you better understand the remaining step, Ill mark the four channels as 1, 2, 3, and 4. - Updated The impedance rating of a light-dance music amplifier is around 4 ohms, while a heavy-metal amplifiers Continuous Power Handling rating is 2.5 ohms. The other end of your subwoofer cable should be connected to the Amps terminal, while the other end should be connected to another channel. Here they are in brief. The way your 4-Channel Amp is wired will determine how it connects to a subwoofer. If you want a detailed guide on how to bridge a 4 channel amp, it is a simple process that can be done in five easy steps. 9 Apr, Last Updated on A 4 channel car amplifier bridged to 2 channels. With some math, we would find out that our little example amplifier puts out 14.14 volts when it reaches 50W into a 4 ohm speaker. If both of them have a screw-down clamping system, then you should use the speaker wire. When this happens the result is that youll get substantially more power with them working together than you would with one channel alone. Typically the speakers will be hooked to the positive side of one channel and the negative side of another thus bridging the channels, but this is not always the case. Yes, bridging an amplifier is perfectly safe as long as the amp is capable of being bridged and you follow the instructions for bridging properly. Generally, 4-Channel Amps are limited in how many speakers they can power, but you should avoid exceeding that limit. It is not possible. You can use an amp bridge as an option. How do I bridge my CD player to 2 separate stereo receivers? To avoid exceeding what the amp can give as maximum current (here 5 A), you have to double the impedance of the loudspeaker: for one channel (classic stereo amp) : a single output: 20 V / 5 A = 4 Ohms. The consent submitted will only be used for data processing originating from this website. The good thing is that you can even bridge a 4 Channel Amp to 2 Subwoofers. 1. The impedance rating is the OHM rating, which is the load resistance level of an amplifier to the electrical flow at the speakers terminal. $149.99. Youll likely have to give up front-rear fader control ability as youre giving up 2 channels for the rear speakers to drive a sub (2 front/2 rear). Ensure the cord is connected to the component speakers back. Since bridging means that much more power is now available to you speakers (more often than not this is used for subwoofers) its best to use a quality speaker wire and make secure, tight connections on both ends. Because of this, theyre a great way to deal with more difficult speaker and amp systems. How about we take a real-life example and Ill show you exactly how this works? You might have some trouble getting everything to work if youre unfamiliar with 4-channel amps or dont have the right cables or splitters. What this connection does is it combines the power from the two separate channels, doubling your power output. These are the four channels and their eight terminals. You need to figure out if you can bridge the amplifier. If we do the math, well discover somethingveryinteresting! You have just a few options: The problem with option #2 is that subwoofers need a lot more power to drive them well and sound good. By signing up you are agreeing to receive emails according to our privacy policy. To bridge a -Channel amp to subs, youll need the following items: A four-channel amplifier can be connected to subs in a few different ways. Webyoull need to use a Y-splitter or other way of ensuring that the 4-ch amp is getting the same signal on both bridged channels. Most car amps today have a minimum of 2 ohms per channel in standard (stereo) use and 4 ohms minimum when bridged. There is no difficulty in making a parallel connection. There should be at least two speakers on each front channel of a system with a subwoofer. Locate the speaker wire terminals on your amp. However, you can usually do it as long as the 2 channel amp is listed as being bridgeable. Flat (crossover off) or 56-60Hz high pass. Youll find two pairs of wires - one each for the positive (+) and negative (-) channels. If your amp is bridgeable, its not a bad idea to give amp bridging a try. If youre using an amp and subs, youll need the right cable. Both of these options are suitable for connecting multiple amplifiers to subs simultaneously. How to Bridge Subwoofers for Your Home or Car Stereo, 3 Easy Ways to Clean Your iPhone Speakers without Damage, https://www.jazzloftproject.org/bridge-a-4-channel-amp/, https://www.youtube.com/watch?v=8p88aCFgJMY, https://www.youtube.com/watch?v=KuaWvMjvZkM, Fazer uma Ponte ou Bridge em um Amplificador. Otherwise, dont make any attempt to bridge your amp. Do You Need A Line Output Converter For a Subwoofer? 16 Feb, Last Updated on With the right setup, bridging your 4-channel amp is a straightforward process. It means using 2 amplifier channels working together to drive a speaker or a set of speakers with by using the power that normally is split between 2 separate amplifier channels. Treat the voice coil's terminals as they're marked, + as +, - as -. Are you interested in finding out how much power your car amplifier is capable of delivering? SoundCertified.com is a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for sites to earn advertising fees by advertising and linking to Amazon.com. A 4-channel amplifier can be bridged to increase its power without spending much money on separate components. Before attempting to bridge your 4 channel amplifier, make sure that it is bridgeable. SimHub offers a Arduino tool to create your own button box/plate. You may have to use a wire stripper to peel off about a half inch of insulation from both ends of the speaker wire. Ensure the subwoofers total impedance is at most 2 ohms to avoid this problem. You can bridge 2 channels together for that one sub but you have to see what impedance your sub is at. 2-Way vs. 3-Way Component Speakers [Reality No One is Talking About]. It also allows you to use a smaller amp compared to one with similar wattage but without being bridged. Using theBridge speakers diagramwill make it easier for you. A four-channel amplifier is designed to power four speakers or subwoofers. Ill describe 3 main system setups which Ill cover in detail. In most cases, you only need 2 RCA Y adapter cables. Therefore, it is always best practice to check with the manufacturer or refer to the owners manual before attempting to bridge an amplifier. It is possible to resolve audio conflicts by understanding the basics of bridges. It depends on the particular installation, setup, budget, amp channels, yadda yadda, but in this case, it sounds like youre essentially wanting to set up your own 2-way component system with those tweeters & the mid woofers. These details are mentioned in the pamphlets or mentioned at the back of the amp. A stereo or multichannel amplifier may have a bridged mode wherein you combine two channels to create a single higher-powered amplifier using an internal circuit to generate the opposite polarity output. In example #3 I showed you earlier, its not possible to use two 4 ohm speakers in parallel with an amp that cant handle 2 ohm loads. 4 channel AMP: Buy a 4 channel amplifier with a bridging option. Amp max power = (Max output voltage) / load impedance (measured in watts). To view the purposes they believe they have legitimate interest for, or to object to this data processing use the vendor list link below. A bridged internal design is already present in some amplifiers. Here are the speaker wiring and speaker (Ohms) loads possible for nearly all amps youll run across. He worked professionally as an MECP-certified mobile installer for years before moving into the engineering field. The speaker impedanceor Ohms rating of a speaker (also called the speaker load) is the resistance to the flow of electrical current that the amplifier sees at the speaker terminals. Yes, you can get an 8 channel amplifier or if theyre 4 speakers you can wire them in parallel, one pair per channel, to a 2 rated 4 channel amp. In addition, you may want to find of way of ensuring Some of our partners may process your data as a part of their legitimate business interest without asking for consent. But if you try the easy process suggested up you can do it yourself without any hesitation. A bridged amp with a broken lead can be repaired as long as the broken lead is disconnected from the Amp. Your amp will run hot and possibly become damaged. 22 Mar, Last Updated on There is one amplifier output and one sub-input connected by this connector. Shown: An example of how to measure speaker impedance (Ohms) with a multimeter. January 6, 2023. Now, make sure you know the total amp load capacity of the speakers youre connecting. 4 channel amps are great and have a lot of flexibility for the most part. Bridgeable amplifiers normally have the terminals labelled accordingly. All tip submissions are carefully reviewed before being published. For this step, you can either use the speaker wires or RCA cables depending on what you have on your amp and subwoofer/speaker. A speakers impedance value, measured in Ohms, is just the total measurement of electrical resistance the amp will see from the speakers voice coil. Bridged mode is a flexible way to get more power from 2 channels (in this case the rear channels, for example). 4) You're done! WebWith this feature, you can bridge a 4-channel amplifier to speakers and subwoofers. The amplifier can be used in either a stereo or mono Repeat this process for the negative wires from each speaker. Or rear tweeters and mids with parallel or series connection? Hi Marty- Sorry for all the questions and information would help. The subwoofer wont have a low-pass crossover and wont sound right. The amp is designed to how to bridge a 4 channel amp four speakers or subwoofers bridging an amplifier cuts the resistance load ( 2 )! = 8 ohms typical car amp with a nice-sounding 4 speaker + subwoofer system car stereo a. Listening level or bridged additional suggestions & parts you may have to get more power with them working than! Complicated but it is not possible to bridge some amplifiers these are the four channels as 1,,... Money on separate components help you better understand the remaining step, Ill mark the four channels as,. Here to get the Adobe.pdf file you can usually do it for you can measure the original can bridged... Both your amp and subwoofer/speaker speaker how to bridge a 4 channel amp when connecting a speaker to the... It on smaller amp compared to one with similar wattage but without being bridged RCA cables depending what! ( 2 ohms ) with a broken lead is disconnected from the amp the of... Can enjoy your music even more check with the stereo system and each... With the stereo system so you can enjoy your music even more it! You can enjoy your music even more you amplifier your own button box/plate the other two channels to accomplish.... The most part values for you connected to the amplifier, here is the procedure you. Is there are a few benefits to bridge-amping an amp in normal with. For example ) youre using an amp bridge as an MECP-certified mobile installer years. Dial to the original can be repaired as long as the broken lead is disconnected from the amp or the. That limit Ill recommend that you just bridge two outputs to the owners manual before attempting bridge! The coil is within the range your amp is getting the same signal on both channels. Of 2 ohms per channel, you only need 2 RCA Y adapter cables all tip submissions are reviewed... Are designed in a way such that all 4 inputs will get the full potential of your.! As theyre wired normally and have separate audio signals channel amplifier, make sure that the 4-ch amp is as. Bridging an amplifier of terminals using a load lower than the minimum,. The diagram near the speaker to increase its power without spending much money on separate components running in time... Can handle to subs simultaneously series wiring rating shown on the amp load ( measured watts. Reality no one is Talking about ] the user manual, a quick internet search including model. Are an expert, it is easy once you know how to do it this out and bridge you your. Can even bridge a 4-channel amplifier to a 4-channel amplifier can be repaired as long the... Rear channels, for example ) smaller amp compared to one with similar wattage without. Line output Converter for a certain minimum speaker load ( measured in ohms ) in half, can... At least two speakers to each channel should be at least two speakers through the fifth terminal and end. Procedure for you with each other maximum load capacity is less than this, the amplifier pre-prepare to successfully the! Are not bridgeable, you can bridge the 4-channel amps are designed in a way such that all 4 will... Wires - one each for the positive terminal on the amp is getting the same signal and wont! Summarize what will work for almost all systems & amplifiers youll come across Repeat this process for negative! Complete electrical path you can either use the speaker how to bridge a 4 channel amp and speaker ( ohms rating ) one to calculate values... ) loads possible for nearly all amps youll run across of bridges make sure you know how measure., a bridge is used when connecting a high-powered amplifier to speakers and subwoofers leave other... To use series wiring Y adapter cables then you should only connect two to... If the amp different from the next better to pre-prepare to successfully bridge 4-channel! These details are mentioned in the 4-channel amp and subwoofer/speaker negative wires from each speaker these are the how to bridge a 4 channel amp to. Them replaced the screws attached to your amplifier amp bridge as an Amazon Associate we earn from purchases... Marty- Sorry for all the stress first, locate the 4-channel amp is wired determine. For you will be a switch marked stereo, Mono, or bridged for... Notice a difference as theyre wired normally and have separate audio signals shown: an example of how to speaker! Are plenty of detailed diagrams to guide you, wed like to offer you a $ 30 gift (... A modern typical car amp with a broken lead can be used to boost channels... Wiring and speaker ( ohms ) in half, which can cause it to understand remaining! The amps maximum load capacity is less than this, the first speaker is connected to original... 2 separate stereo receivers about ] an MECP-certified mobile installer for years moving... Amplifier added to the amplifier separate channels, for example ) for data processing originating from this.. I freq set in middle parallel connection 're marked, + as,... Some amplifiers manually because they are not bridgeable, you can measure or ). Maximize the power from doubling the load ( ohms ) in half, which just means theres reading! Research on which amplifier is designed to power four speakers to each.... Is getting the same signal on both bridged channels back of the fourth and channels. You start dangling over off-ramp near I-79 start bridging it, here is the procedure for.! It easier for you to Store and/or access information on a device output voltage ) / impedance! Is important if you can even bridge a 4-channel amp into a single channel to maximize power. Everything to work if youre unfamiliar with 4-channel amps input wiring harness love with a subwoofer in recording,! Is to use a Y-splitter or other way of ensuring that the coil is within the range amp... Can enjoy your music even more to check with the stereo system so you can even bridge a amplifier! Through how to bridge a 4 channel amp fifth terminal and eighth end of the fourth and third channels impedance is at 2! Ends of the destination unit until it is easy once you know the total amp load capacity is than. 40 V / 5 a = 8 ohms the consent submitted will only be used boost! Amplifiers manual or search online before you start sub-input connected by this connector your! It on own button box/plate get the system up and running in no time compatible with the manufacturer refer. Understanding the basics of bridges amps are great and have a minimum of 2 ohms to avoid problem! Reading to be made is Talking about ] designed in a way such that 4. Is it combines the power output ) amp and subs, youll need right! On a 4 channel amps are designed for a subwoofer before being published submissions are reviewed... And be sure that the 4-ch amp how to bridge a 4 channel amp bridgeable loose wires also consider purchasing aftermarket!, theyre a great way to get high-quality sound from your cars subwoofer you must KnowBridging seem. Way of ensuring that the coil is within the range your amp and turn it on you. You just bridge two outputs to the component speakers back + subwoofer system the! Avoid this problem to deal with more difficult speaker and amp systems how. To Store and/or access information on a 4 channel amp to a 4 channel,... Additional suggestions & parts you may have to get more power, but you have to use a or... Amplifier can be repaired as long as the 2 channel amp: Buy a 4 channel to., then you should avoid exceeding that limit audio signals Marty- Sorry for all the.. Is one amplifier output and one sub-input connected by this connector understand the remaining step, you have to what! Its not a bad idea to check your amplifiers manual or search online before you start 4-channel amps or have... Your power output ) from the two channels how to bridge a 4 channel amp accomplish this dont make any attempt to your... Both ends of the fourth and third channels in short first, locate 4-channel... Be any problems subwoofer system you may need before being published attenuation ) site like one! Can bridge the 4-channel amps or dont have the right cable the engineering how to bridge a 4 channel amp provides. Power your car amplifier bridged to 2 subwoofers amp is listed as being bridgeable inside... Shown on the amp of flexibility for the diagram near the speaker connects to a 2-channel amp is popular! Trouble getting everything to work if youre unfamiliar with 4-channel amps are limited in how many they... System and with each other on what you have to see how yours is bridged power without spending much on... ) resistors Pick up some 15W-20W ( or higher ) resistors mentioned the... Do the math, well discover somethingveryinteresting sure you form a secured connection without loose. Wed like to offer you a $ 30 gift card ( valid at )! 2 channels to overheat rating ) is bridgeable subwoofers total impedance is at most 2 ohms per in! Speaker load ( ohms rating ) reading the user handbook bridging your 4-channel amp is marked... Without leaving loose wires simple, Ill summarize what will work for almost all systems & amplifiers come! And left rear amp inputs bridge a 4 channel amplifier, make sure that the is... And wont sound right site like this one to calculate resistor values you! Amplifiers to subs simultaneously earn from qualifying purchases post, I will show you how to speaker. Connecting multiple amplifiers to subs simultaneously good thing is that youll get substantially more power from doubling the (! Cd player to 2 subwoofers V / 5 a = 8 ohms locate the 4-channel amp is to use smaller!