One "creative" way of doing that is by bridge-balancing them. so that a 50x2 Watt amplifier @ 4 ohms really does produce 200x1 @ 4 ohms. amplifiers it is usually 4 ohms. I used resistance instead of impedance because, for this example, impedance would complicate things greatly. To bi-wire your speakers, first remove those jumpers and use two sets of speaker cables. The instantaneous voltage increases as the waveform moves toward 90 degrees. If we have a 2 ohm load on each channel, at the highest point on the waveform the amplifier will apply 20 volts to the speaker load. you should use. Power=(40*40)/4 ohms Depending on the topology of the amplifier sometimes not even then. Keep In other words, when more voltage is applied to a speaker, the speaker will play louder. It is not for bi-amping, and the terminals should not be connected. At the speaker end they will separate and at your receiver or amplifier end, they will typically be joined together. The speaker (mentioned above) would be back at its point of rest at this point in time. Even class D amplifiers have a limit as to the lowest impedance and when bridged with a second amplifier, the rated impedance is 2x the rated impedance when run normally (not bridged with a second amplifier). There are even more possibilities when more than 2 DVC drivers For example, 3 DVC [Shop for car amplifiers] Wire. I might not be quite understanding your question correctly though, if you uploaded a diagram it might help me give you a suggestion. and the speakers can draw more power from the amp. When you bridge an amplifier you are effectively doubling the load on each amplifier. For two 4 ohm speakers, the total impedance would be 2 ohms. with car audio. As far as the amplifier is concerned, they are the same load. At this point, the waveform has gone through 90 of the 360 degree cycle. If you remember the section on Ohm's law, you will understand that the amp will only be able to produce 100 watts (peak power) into a 4 ohm speaker. woofer is driven by more powerful amp. This diagram shows 2 waveforms and the reference to the 360º cycle. To find the total impedance of speakers in parallel, use the formula Many people feel that they have to connect every multi-channel amplifier they own (generally 2 ohm stereo stable or 4 ohm mono stable) in a 2 ohm mono configuration. When the amplifier tries to drive the 2 ohm mono at full rail voltage (40 volts) the safe operating area of the transistors will (more than likely) be exceeded. Mono means that there's only one output signal. It is not suggested that you run speakers in series. Realize that a speaker must move equally in both directions from its point of rest. The 100 watts is peak power. Different wires will have different line capacitances, which In configuration z we have added another 4 ohm speaker bridged onto the amplifier. he was wondering if i could help him install the system, and he said that i would have 2 bridge the amp to … terminals on the amp. amplifiers can also handle a lower resistance. P=E*E/R If the amplifier's power supply output is 40 volts total or ±20 volts with "ground" as the reference, the maximum instantaneous voltage that can be applied across the non-bridged speaker's terminals is 20 volts. There is only a difference of .1db between 18 gauge and 12 gauge. back. Keep in mind that we are talking about the most common types of amplifiers which are designed to drive 2 ohms or higher per channel (2 ohm stereo stable and 4 ohm mono stable amplifiers). Attempting to use an amplifier at © 1996-2021 Michael LaLenaAll rights reserved. Any more could introduce will act slightly different from each other when presented Among EL84/6BQ5/6p14p based SETs, most No-nfb audio amps run in triode mode, most guitar amps and NFB home amps run in pentode mode. For Every amplifier is designed to handle a certain load. There are amplifiers (high current amplifiers) which are designed to drive low impedance loads. Another interesting consequence of bridging is that the amplifier damping factor is cut in half when you bridge. Stereo - If you run the amp in stereo, you'll have an 8 ohm speaker on the right channel and an 8 ohm speaker on the left channel. If not, look for some indication next to the speaker terminals on the amp. This allows you to get the total power supply voltage across the speaker. You know that the amplifier could produce MUCH more (and also maximum) power into four 4 ohm speakers (which would be equal to a 2 ohm load per channel), but maximum power would not be produced into the single 4 ohm speaker on a single output channel (i.e. Basically, when you bridge an amp you use the + terminal from one channel and the - terminal from the other. the impedance of speakers in series. If you learn to bridge a two-channel amplifier you can bridge a four channel amplifier too. If both amplifiers are driven to the same output level, the current flowing through the outputs would be equal. Confirm that the power amplifier in use is capable of bridged operation. an unstable load will damage the amp. Let’s be realistic – you cannot get “perfect sound” in an incredibly tiny package for less than $150.When it comes to sound, there are always compromises that must be made. The sources of power are the independent channels of the amplifier. Usually, 18 gauge wire is sufficient, except for high power (subwoofer) To bridge amplifier channels connect the positive (+) and negative (-) leads of your speaker cable for the single speaker to the INNER positive (+) and negative (-) terminals of the speaker connector and select the mono button for the bridged zone. An amp normally rated at 100W might deliver 300W to 400W when bridged. At the input stage, there is a transducer device that converts the change in … NOTE: In the following diagram, you can see a speaker connected in a normal configuration and another speaker connected in bridged mode. The instrumentation amplifier, along with a transducer bridge can be used in a wide variety of applications. you need to check what the ohms are for your amp at bridged power. are used in a series/parallel configuration. This means that there is no signal on those connections. Bridging a Power Amplifier: 1. the - terminals. First, make sure that the amplifier you have is bridgeable. damage the amp. When wired in series, these Amplifier bridging is simply using 2 channels of an amplifier to drive a common load. If another sine wave of the same frequency would start at "A" at this point in time, it would be 180 degrees out of phase with reference to the original waveform. You may be temped to use typical electrical wire instead of speaker This is done so that car stereo systems using their equipment can enter The bridged speaker uses 2 signal leads. 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. This is because while one speaker terminal is being driven positive (towards the positive rail), the other terminal is being driven towards the negative rail. This is why some of the older amplifiers used a 'bridging module' (it inverted the signal going to one channel). The signal on one speaker terminal is a 'normal' signal while the signal on the other speaker terminal is 'inverted'. The 100 watts is peak power. JL Audio 12W6 woofers at 6 ohms per coil can be wired into a single channel of the same amp. For now assume that the full power supply voltage (positive or negative) can be driven into the speaker. When a speaker is bridged onto an amplifier, BOTH speaker terminals are driven with a signal. Meanwhile, many low end manufacturers overstate the power Refresher: Bi-amping also removes the need for any circuits to fix The inverted channel is basically a mirror image of the normal channel. Remember, we are not concerning ourselves with inefficiencies within the amplifier. Mono means that there's only one output signal. This is a tough call for many amplifiers, and you need to tread carefully with integrated and multi-channel amplifiers. A bridge-parallel amplifier configuration uses a combination of the bridged and paralleled amplifier configurations. If a speaker is capable of bi-amping, then the plate on the back Utilizing your amplifier’s manual is the easiest method to figure out ways to bridge it. It’s basically a variation of the typical 4-resistor differential op-amp circuit which uses the bridge for those 4-resistors, forming a sort of quasi bridge configuration. When the waveform reaches point "A", it starts a new cycle. Some higher performance amplifiers even have two sets of speaker connections to make it easier to connect things up. How to Bridge an Amplifier Bridging refers to combining two (four) channels of an amplifier into one (two) channel (s) with twice the voltage. of their amplifiers. channels of the same amp with the same signal, and you must use Use the following table to determine what size power wire Also, the insulation isn't of the same The amp would be seeing an 8 ohm load. The third waveform is 180 degrees out of phase with respect to the reference waveform and 90 degrees out of phase with respect to the middle waveform. Bi-Amping refers to using different amplifiers (or different channels This can also include any crossovers and that is if your amp can even be bridged! Amplifier bridging is simply using 2 channels of an amplifier to drive a common load. There could be more than one speaker but each speaker will have the same output. Jan 23, 2009. Bridging an amplifier cuts the resistance load (measured in ohms) in half, which can cause it to overheat. The waveform's potential (voltage) is at (equal to) ground (the reference) which, in this case, is the same as "0 degrees". an amp. It it NOT necessary to bridge a multi-channel amplifier to make it produce maximum power. These are generally the same people who have owned (and destroyed) many amplifiers. To bridge two mono amps, you invert the output of one of the two amplifiers and connect one amplifier's output to the positive speaker terminal and the other amplifier to the other speaker terminal. You cannot run both coils off different You can see that the peak voltage available to the normal speaker is 1/2 the voltage available to the bridged speaker (between points A and B). In the diagram below, there are 2 sine waves. Even with 100% amplifier efficiency, The RMS power would only be 1/2 of the power output indicated. You will also see that both positive terminals have a normal (non-inverted) signal on them. Generally, if you use an 8 ohm speaker, and the amplifier is a good amp for driving 4 ohm speakers, it will behave well bridging. To bi-amp the speaker, remove the metal piece. quality low power amp for the highs, and a more powerful amp for the lows. both coils. details/options TBD. Bridged - If you run the amp in bridged mode, you'll only be using one (bridged) channel. It is very easy to invert one channel when designing an amplifier and it makes the amp much more versatile. How to Bi-Wire Your Speakers. By using the bridge sense resistor as the op amp feedback resistor and lifting that resistor from ground, the circuit generates a constant current through the sensor. Remember that resistance/impedance is the opposition to the flow of electrical current. Given 2 DVC I set up the bridged amps as per the instructions on the manual. The copper in electrical wire is of less quality than This is the point of maximum instantaneous voltage for the sine wave signal. wire to save money. If one speaker terminal is connected to a reference point which has no signal (commonly referred to as ground-indicated by the red line) and the other speaker terminal is connected to the signal (speaker output) lead of the amplifier, you will only be able to get half of the power supply's total voltage across the speaker at any point in time. On a 2-channel amp, there are 4 terminals: a positive and a negative for the right channel, as well as similarly for the left channel. For most speakers, if this signal were applied to the positive terminal of the speaker and the negative terminal were connected to the reference (ground), the speaker would be pushed out of the box. If you have an amplifier rated to drive a 2 ohm stereo load (2 ohms on each channel), it's only going to be able to drive a 4 ohm (or higher) bridged mono load. As was previously stated, a 4 ohm mono load is the same as a 2 ohm stereo load as far as the amplifier is concerned. there is a thing called ohms. Power=(voltage across speaker*voltage across speaker)/(resistance of the speaker) hey i am working on my friends 1967 pontiac le mans, and he just bought a stereo system (2 speakers, a 1000 watt 4 channel amp, and a subwoofer). To produce maximum power into a single 4 ohm speaker (without increasing the rail voltage) you could simply invert the signal of one channel and bridge the speaker on the amplifier. In many amplifiers, the reference is actually 'ground'. For 2 channel amplifiers, one left signal and one right signal is used to drive a mono speaker load. When the load is lowered to 2 ohms mono as in configuration z, the current flow through the output transistors is doubled (4 ohms mono vs 2 ohms mono). Use good speakers & reliable connections It’s important to use a good reliable connection for speakers. There is less resistance to the current, terminals to use. To bridge, begin by connecting the amplifier to the speaker. In the real world the output voltage would be somewhat lower due to inefficiencies but we won't worry about inefficiency right now. I have two Adcom GFA-565 monoblocks. that is seen by the amplifier. The reason why a 2 ohm mono configuration is dangerous to most multi-channel amplifiers will be covered a bit later. Make sure your amplifier can be bridged. This is for ease of running multiple speakers in parallel. In the above diagram, the middle waveform is 90 degrees out of phase with respect to both of the other waveforms. are shown below for DVC drivers with 4 ohm coils. What size power wire should be used when wiring amps for a car. You would just be asking for trouble. It is usually done to increase the power output to a speaker or to utilize both channels of a stereo amplifier if you only have one woofer. Power=400 watts, You can see that this is considerably more power! differences will cause distortion in the form of back EMF. These points are especially important when dealing You can see that the voltage is at it's lowest point (it's actually at its maximum negative instantaneous voltage). On a 2-way speaker, the mid and tweeter are driven by different channels on An example of this is shown below. not cause distortion problems. amplifier's output increases. This is the resistance (impedance) presented by the speakers Power=(20*20)/4 ohms Connecting two amplifiers takes only three basic steps: Run speaker wire from the back of one amplifier into input A on the back of the switch box, making sure to connect right to right and left to left, and positive to positive and negative to negative. 4) Do the same with the other stereo amp. In most bridgeable amplifiers, especially American made amps, the left positive has the in phase signal and the right negative has inverted signal. Even with 100% amplifier efficiency, The RMS power would only be 1/2 of the power output indicated. Bridging means that you are using more than one source of power to drive a load (speaker). Please read the manual before attempting to bridge your stereo amp. Note: some professional audio equipment has 4 binding posts on the These 4 methods All the wires depicted in the Subwoofer Wiring Diagrams are speaker wires. Keep in mind that mono and bridging are not necessarily the same. inductors. points of high end cables. handle a 2 ohm load, while some can go as low as 1/2 ohms. It has many variations. Additionally, a switch on the back of the unit will need to be flipped in order to enable bridged operation. You must have a reference or the term "phase" has no meaning. You can however run both coils of a DVC (Dual Voice Coil) speaker in series. below. The cone movement for both coils will be identical, and will The instructions that came with the amp should describe which terminals to use. This is usually done so that you can use an active crossover before the amplifier. The instructions that came with the amp should describe which Also consider amplifier output protection. terminal from one channel and the - terminal from the other. When one channel is inverted, it's output voltage Same can be said of 6gv8/6f5p amps, [2]. is of the same magnitude as the "normal" channel but is of opposite polarity (as indicated by the violet and yellow lines of the following diagram). On a 2-channel amp, there are four terminals: a positive (+) and a negative (-) for the right channel , and likewise for the left channel. This means that they Notice that the right negative has the signal on it, also notice that the signal is inverted (flipped upside down). Most quality Now remember that 4 ohm speaker and the fact that the power dissipated in it's voice coil is determined by the voltage across its terminals. It would be best to solder terminals speaker wire, and will be prone to rust. Looking at the next diagram, configuration 'x' shows a 2 ohm stereo load. The first waveform is the "normal" sine wave. There isn't a problem with bridging a stereo amp, but I would never bridge two amps together. Remember that we are only considering a single point in time for this example. If not, look for some indication next to the speaker No two speakers will be exactly identical, even if they are the At any point in time, if the normal channel's output voltage is positive, the inverted channel's output voltage is negative and vice-versa. There seems to be some confusion as to why a 4 ohm mono and a 2 ohm stereo load are the same, as far as the amplifier is concerned. Too many people think that all large amplifiers can drive low impedance loads. An amplifier depends on a high enough impedance to limit the current flowing through the output transistors when the amplifier drives it's full rail voltage into the load. parallel? To bridge amplifiers that have signal only on the positive speaker terminals, if you want to bridge two channels to one load, you have to use some means to invert the signal on one channel (remember the old 'bridging modules' for Orion amplifiers?). At point c, the instantaneous voltage is back at reference and we have gone through 180 of the 360 degree total cycle. very long coils of copper wire which can have a very high resistance. For many amplifiers, the left positive and right negative are are the signal outputs. Most car amps can quality as speaker wire. For 2 channel amplifiers, one left signal and one right signal is used to drive a mono speaker load. the ground wire length to 1.5 feet or less. Note that at this point, the speaker would be forced the maximum distance from its point of rest. I want to get two more and use two per side for the woofer towers of my Infinity Beta speakers. In the next image, you can see that both negative terminals, on the non-bridgeable amp, go to a reference point inside of the amp. Keep in mind that mono and bridging are not necessarily the same. A few use the left negative and the right positive. Architect Amplifier product pages here. You can see by the following formula, that the power getting to the speaker is much greater. To fully understand how amplifiers are bridged, we should first cover "phase" as it applies to audio amplifiers. stereo or 4 ohms mono bridged. Normally, an amplifier may consist up to 4 channels. resistance (load), but they will produce less output. All amplifiers can handle a higher Mono PP The drawing describes the main idea. applications. for the bass amp. can cause the wire to act as a low pass filter. of the same amp) for the low and high frequencies in the same speaker. Still, it can be done. It will now be able to drive the 4 ohm speaker with 40 volts instead of 20 volts in the previous example. And please ensure the interconnects and speaker cables are plugged into the right places. To bridge a two channel amplifier, locate the amp terminals. We are not talking about connecting two speakers to a stereo amp, as that simply involves connecting one spe aker to each amplifier (left and right). Use the same thickness for the ground wire. With car Configuration 'y' shows a 4 ohm mono load. This number is usually the same as the combined power of This means that the load has doubled which means that there is only one half of the impedance of configuration 'y'. two terminals you should use to bridge the amp, as shown on the right. power. In a 2 channel (left and right) bridgeable amplifier, one output is in phase with the input signal and the other channel is inverted. Remember that the AC voltage across a speaker's voice coil is what determines the amount of power dissipated by the voice coil (and ultimately how much sound pressure the speaker will produce). Some people say that when an amplifier is bridged onto a 4 ohm load, it 'sees' a 2 ohm load. When the load decreases, the speakers, there are 4 different wiring methods. Mono amplifiers that have only one channel must have a way to invert the signal on the output of the amplifier. You can only bridge an amp with stereo output amplifiers. After it passes this point in a counter clockwise direction, the voltage starts to drop. Then do the same for The normal connection uses 1 signal lead and the reference (ground). Always remember that when an amplifier is operated in bridge mode, it appears to be driving 1/2 the normal load impedance, so make sure each channel of your stereo amp is capable of driving 4 Ohms if you are planning to operate into a standard 8 Ohm loudspeaker. same model from the same manufacturer. NOTE: As you can see, the first waveform is the reference. First off, we need to set the stage by understanding what this little amplifier is and isn’t. Now, what if you have only a single 4 ohm speaker and a 2 channel NON-bridgeable amplifier with sufficient current output capability to drive a 2 ohm load on each of its output channels? -HEADS UP-you can not just bridge an amp for more power hook it to subs and be happy. This is 270 degrees through the cycle. The woofer controller has plus and minus phase outputs. If you have one and about to start bridging it, here is the procedure for you. resistance, and both coils MUST be hooked up to the same According to the specs, each speaker would receive 1050 watts. Can anyone tell me how to bridge two mono amps together to make a single more powerful amp. of a single channel on the amp. This allows you to purchase a high to the ends of the wire to prevent the rust problem. Run speaker wire in exactly the same way from the back of the second amplifier into input B. the competition. This is the formula to calculate car audio competitions in a lower Wattage category, giving them an edge over It is not an end-all solution for the best audio quality money can buy. This is because very few amplifiers (especially Class A/B amplifier) are capable of safely driving a 2 ohm mono load. together. then it comes to how you wire your subs to achieve the correct ohms. Theoretically, the output should be 4 times the power Well this would be true if the amplifier components were 100% efficient. The amp's got to be a bridgeable stereo amp. You will need this wire to … Owned ( and destroyed ) many amplifiers, and you need to check what the ohms for. Instructions on the amp used resistance instead of impedance because, for this example uses a of! Two per side for the lows can bridge a two channel amp two... Would act as a 200Wx1 amp for the highs, and the - from. Should use to bridge the amp to the `` normal '' sine wave wires depicted in the example! Side for the woofer towers of my Infinity Beta speakers stage by understanding this. `` inverted '' or 180 degrees out of phase with respect to both of the impedance of speakers in.. Starts a how to bridge an amp cycle the same channel of the bridged amps as per the instructions that with... Makes the amp is usually the same load load will damage the amp terminal from the other terminal. The sine wave subwoofers, we recommend using wires of 12- to 16-gauge in size reason why a 2 load... Recommend using wires of 12- to 16-gauge in size help me give you suggestion... Will play louder quite understanding your question correctly how to bridge an amp, if you learn to the... A common load a 50Wx2 amp bridged would act as a 200Wx1 amp the 360º cycle are same. Amp for the specifications on the manual before attempting to use an amplifier, along with a signal a. Is very easy to invert the signal is inverted ( flipped upside down.... Connections to make it produce how to bridge an amp power two channel amplifier, or lacks documentation, online... Though, if you learn to bridge the amp in bridged mode ' signal while the signal going one... But they will produce less output on one speaker terminal is a 'normal ' while! Are bridged, you 'll only be 1/2 of the 360 degree cycle in general, only amplifiers high-current. And tweeter are driven with a signal and minus phase outputs high frequency amp and! Speakers in parallel, use the following diagram shows how the waveform moves toward degrees! Are for your amp at bridged power through 90 of the 2 channels of amplifier... Non-Inverted ) signal on them simple power supply voltage ( positive or negative ) can be bridged a amp. In a different type of illustration impedance because, for this example moves through point! As a 200Wx1 amp 1 signal lead and the terminals should not be quite understanding your correctly! To act as a 200Wx1 amp is a 'normal ' signal while the signal to! Right positive you bridge an amplifier at an unstable load will damage amp. Instrumentation amplifier, along with a transducer bridge can be said of 6gv8/6f5p amps [. Load how to bridge an amp doubled which means that they will typically be joined together another interesting consequence of bridging is the! Connection uses 1 signal lead and the reference to the specs, each speaker would forced... Cone movement for both coils at bridged power 4 ) Do the same,. Will more than likely destroy the amplifier is used, or the term `` ''. The waveform reaches point `` a '', it starts a new cycle the amp. Run both coils will be lines connecting the two terminals you should use to bridge two... Drivers are used in a single channel on the amp should describe terminals! Bridgeable stereo amp the total impedance would be equal be joined together bridged, you only about. Power of the amplifier components were 100 % amplifier efficiency, the mid and tweeter are driven the! 'Ground ' are not concerning ourselves with inefficiencies within the amplifier damping factor is in. Include any crossovers and circuits connected to the speaker at point c the! How amplifiers are driven to the 360º cycle that are 180º out of phase in. It not necessary to bridge the amp should describe which terminals to the specs, each would. Using an active crossover before the amplifier is bridged onto a 4 ohm coils not run both of! Has 2 coils instead of one as in a series/parallel configuration 's website '' sine wave signal how... Before how to bridge an amp amplifier E/R Power= ( 40 * 40 ) /4 ohms Power=400 watts, you can see that positive... Half the load amplifier cuts the resistance load ( measured in ohms ) in half, which can it! Volts instead of one as in a wide variety of applications for woofers require large. Are amplifiers ( high current amplifiers ) which are designed to drive a mono speaker load,... With inefficiencies within the amplifier 's output increases wires depicted in the above diagram you! Which can have a normal ( non-inverted ) signal on those connections instrumentation amplifier, along a! ) channel driven into the right negative are are the same signal, and will not cause distortion problems as! Amp can be used in a normal ( non-inverted ) signal on the amp your speakers, remove. It comes to how you wire your subs to achieve the correct ohms what size wire. Gauge wire is of less quality than speaker wire in exactly the same input signal true the... Tell me how to bridge the amp terminals hook it to overheat amplifier ) are of... As the waveform moves toward 90 degrees out of phase with respect both. Play louder get the total impedance of configuration ' y ' shows how the waveform moves toward 90 out... Good reliable connection for speakers high power ( Subwoofer ) applications not bi-amping! Stereo wire other, to varying degrees single more powerful amp for the.... Half, which can cause it how to bridge an amp subs and be happy % efficient inefficiencies we. Not even then load on each speaker will have the same with proper... To check what the ohms are for your amp at bridged power cause. Far as the amplifier itself waveform relates to the flow of current through the output transistors makes! Phase with each other when presented with the other configuration ' y ' an amp voltage will start to as. Amplifier is used to drive low impedance loads it easier to connect things up to the! Electrical wire is of less quality than speaker wire in exactly the same people have! Svc ) speaker in series waveform is `` inverted '' or 180 degrees out of phase each! Be exactly identical, even if they are the independent channels of same... Simply has two amplifiers built into the speaker end they will act slightly different each. Strain gauge on a 2-way speaker, the first waveform is the formula to calculate the of! 8-Ohm speaker becomes a 2-ohm speaker load ( measured in ohms ) in half which. Starts a new cycle a speaker connected in bridged mode, you can the... As data acquisition systems to enable bridged operation channel must have a way to invert the signal on it also... 2/3 to 3/4 of this power your receiver or amplifier end, they will separate and your... Amps with simple power supply rail fusing are best for bridging same channel of same. Can see by the following diagram shows 3 sine waves that are 180º out of phase with respect both! Bit later according to the speaker, remove the metal piece bridged to one channel when designing an is! Low as 1/2 ohms 8-ohm speaker becomes a 4-ohm speaker becomes a 4-ohm speaker load increased flow of through... 1 signal lead and the reference in bridged mode, you can see the... The best audio quality money can buy be able to drive low impedance loads signal going to one channel and... Sometimes, there are 2 sine waves that are out of phase with to! Is a tough call for many amplifiers, and a four channel amplifier, with. Older amplifiers used a 'bridging module ' ( it 's actually at its point of rest end they separate. Formula below is applied to a speaker connected in a counter clockwise direction the. Question correctly though, if you have is bridgeable invert one channel and the positive. Coils have the same resistance, and you must have a way to invert one must! Assume that the how to bridge an amp of their amplifiers 40 * 40 ) /4 ohms Power=400 watts, you only. Question correctly though, if you uploaded a diagram it might help give... To subs and be happy 's lowest point ( it inverted the signal going to one channel designing. It will now be able to drive a mono speaker load talk about a stereo amp, but will. It ( ideally ) needs to supply double the current flowing through the transistors! Amplifiers, and the reference to the speaker, remove the metal piece outputs would be at... Of safely driving a 2 ohm stereo load is n't a problem with bridging a stereo.! Long coils of copper wire which can cause the wire to prevent the problem. ( SVC ) speaker in series, these differences will cause distortion problems inductors are basically very long coils copper. On both amps are turned to “Bridged” of their amplifiers professional audio equipment has 4 binding posts the. Be quite understanding your question correctly though, if you try to bridge the amp positive. And we have added another 4 ohm speaker bridged onto the amplifier components were 100 % amplifier efficiency, amplifier... Load ( speaker ) very easy to invert the signal on them be 2 ohms next,... 2/3 to 3/4 of this power amp that is by bridge-balancing them to rust bridge-parallel how to bridge an amp. Be best to solder terminals to use amp normally rated at 100W might 300W!