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He currently has an MTX THUNDER500.1 500W RMS mono block class D amplifier with one MTX 3512-04 12" 250W RMS 4 Ohm Subwoofer. Since it has been wired to a single 4-ohm sub, the amp can deliver 250 watts with a properly set gain to match the sub power rating perfectly. The 2 ohm wiring would allow them to work with the amplifier and although the system would not get the full power out of the subwoofers, 800 watts, the system would function and deliver excellent SPL performance. This means we are going to rock big time! Ohms are a measure of impedance, or impedance to electrical current flow. But if your sub has a dual voice coil (DVC), or you are wiring multiple subwoofers to one amplifier, then understanding the wiring alternatives offers insight into how best to connect them to maximize performance. By using our services, you agree to our use of cookies. Calculate a speaker box volume, port length and other parameters without getting confused in formulas. Copyright © 2020 MTX Audio. This website provides all information for free viewing by an unlimited number of persons. Bob has a great single sub system in his Chevy, but wants to upgrade to two subwoofers. The rating on the amp is 300W x 1 channel @ 4 ohms and 500W x 1 channel @ 2 ohms. In reverse, we may be able to change our wiring pattern to accomplish needed impedance totals to match the component combinations we desire. 8 inch Subwoofer Box | Ported | Pipe on the Right Panel. An easy solution is to draw out a diagram to avoid confusion. Easy and convenient build your box. The goal is to deliver as close to rated power to each sub as possible with a given amplifier by wiring the system in a manner that minimizes the effective impedance without exceeding the power rating of the subwoofers. The amplifier is rated at 300 Watts RMS x 1 Channel at 4 Ohms or 500 Watts RMS x 1 Channel at 2 ohms. So we take the 4 ohm impedance and divide by two subs, which results in 2 ohms total impedance. Generally speaking, series wiring is where the positive terminal of the source is wired to the positive of the first load, the negative of the first load is wired to the positive of the second load, and so on. Car Audio Subwoofer Enclosures. Welcome to the CT Sounds Subwoofer Wiring Wizard. Please complete this form and we will have one of our audio experts get in touch with you. Amps can generally be safely wired at 4 or 2 ohms and some even at 1 ohm depending on their design. Generally speaking, parallel wiring is where the positive terminals of the source and all loads are wired from one to the next, and the same with the negative terminals forming two loops. For this calculator to work you’ll need to know the output impedance of your amp as well as the number of speakers used in your cabinet. This amplifier can deliver 500 watts at 2 ohms, so each of the 3512s will get their full 250 watts of optimum power. Since it has been wired to a single 4-ohm sub, the amp can deliver 250 watts with a properly set gain to match the sub power rating perfectly. Questions, comments and requests regarding this software are welcomed and should be addressed to us in support@subbox.pro The negative of the last load is wired back to the negative of the source forming one large loop. Make a subwoofer enclosure plan. Our website uses cookies to improve our site’s user-friendliness (and to measure where our visitors come from). SUBWOOFER + INTERNAL AMPLIFIER + ENCLOSURE, CAN-AM MAVERICK AND COMMANDER AUDIO SOLUTIONS, SPEAKER CABLES, SELECTORS, AND VOLUME CONTROLS, MTX THUNDER500.1 500W RMS mono block class D amplifier. Please fill out the information below to have one of our representatives contact you. If you have an amplifier wired to a single-voice-coil (SVC) subwoofer, there is only one wiring method, so the SVC impedance is what the amplifier must match. So if you have two 4 ohms subs wired in parallel, the system would have an effective impedance of 4 ohms divided by 2 subs for a total impedance of 2 ohms  presented to the amp. Our subwoofer wiring calculator allows you to figure out how to wire your Dual 1 Ohm, Dual 2 Ohm, and Dual 4 Ohm subwoofers in several different qualities. The 55 Series subs are dual voice coil so the wiring is going to be different than our previous example. Next, you need to draw a box, on paper or in a program, it will take at least 20 minutes. So let's look at matching some subwoofer/amplifier systems…. It will attempt to help you get what you want from your audio system and your subwoofer in particular. The calculation of sealed, bass-reflex, bandpass boxes by Thiele-Small parameters. Ideally, Bob want's 2 x 250 watts = 500 watts for the two subs. In series wiring, you add the impedances of the voice coils, so wiring two 4 ohm voice coil subs would result in 8 ohms for the system total as presented to the amplifier. Can he do it with this amp? Instead of burning up your amp, you may be able to wire the combination to result in a total impedance over the 2 ohms so that while the amp will not deliver the full power rating of the subwoofer (and your SPL will be lower), at least the amp will operate safely and reliably. 10 inch Subwoofer … A higher impedance load will result in less amplifier output for that impedance, for example an amplifier will output more power at 2 ohms than at 4 ohms. Our online calculator will make a subwoofer box plan, 3D model and other calculations in about 0.025 seconds - we think it's convincing. This page will touch on a few new topics (all of which are covered in detail on upcoming pages). Make a subwoofer enclosure plan. With subwoofers rated at equal impedances, the system impedance is equal to the impedance of one sub voice coil divided by the number of subs. Many people don't realize that, unless you have virtually unlimited resources, there are going to be trade offs when designing a system. You may occasionally need to compromise. Use of materials (printing, copying) is allowed with reference to the source. While series wiring of multiple subs increases the total effective impedance, parallel wiring of multiple loads lowers the total effective impedance. We can provide you with comprehensive Subwoofer Box Calculator for online creating a high performance subwoofer enclosure. Calculation with line to neutral voltage The phase current I in amps (A) is equal to the power P in watts (W), divided by 3 times the power factor PF times the line to neutral RMS voltage VL-N in volts (V): I(A) = P(W) / (3 × PF × VL-N(V)) The power factor of resistive impedance load is equal to 1. You can find more information about our privacy policies. Since multiple subwoofers wired in combination result in different effective impedance ratings as a group total, we must calculate this total based on our wiring technique. You will receive a link to reset your password. We can provide you with comprehensive Subwoofer Box Calculator for online creating a high performance subwoofer enclosure. A primary factor in choosing component car subwoofers is choosing the correct amplifier to power the system. From the formula above, we see that we can lower the total impedance of the two sub system if we wire in parallel. Speaker wiring is a simple process that often gets complicated when trying to visualize the wiring configuration. Imagine how much time you will need to calculate the length of a port by its area and the net volume of a box, then calculate the occupied volume by the port, add it to the net internal volume of a box, and only after that, calculate the dimensions of a box, taking into account the material thickness. Everyone understands that the box is an indispensable part for the proper operation of the low-frequency speaker, which is designed to work in a certain volume, without it, the subwoofer speaker will simply chase the air, while the efficiency will decrease several tens of times. What if Bob wanted to use that same amplifier with a couple new 55 Series subs which have a dual voice coil design and can handle 400W RMS. Build a ported box, sealed box for your low-frequency speaker. From this distance the Sound Pressure Level (SPL) loss over that distance is calculated in decibels (dB). Of course there are exceptions, for example, as Free Air subwoofers, which are designed to work in an open volume, but the efficiency of these subwoofers is very small, it is recommended to install them only as a last resort. Using the chart in Step 3, for two subwoofers, a final 2-ohm load can be achieved with either two SVC 4-ohm subs or two DVC 2-ohm subs. Two subs on a 500 watts RMS amp will want about 250 watts RMS each. If you wire one subwoofer to one amplifier, your matching calculation is straight forward. If you are wanting to know how to wire your subs look no further than our wire diagram. Then, fill in the input fields of either calculator depending on if you want to know the required power for a target SPL (use the first calculator), or if you want to know how loud a given amplifier will be (use the second calculator). For instance, some subwoofer/amplifier combinations will not allow full power to be produced safely such as a sub combination that results in a 1 ohm effective load for an amplifier rated at 2 ohms minimum. If you want to visualize the resulting drawing in 3D, using SketchUp for example, you will also need at least 15 minutes, given that you have experience with it. A larger Ohm rating equals a greater load impedance. Request Access to Use AtlasIED.com to Place Purchase Orders. Since parallel wiring lowers impedance, always double check to ensure your totals do not run into unsafe levels especially when bridging an amp to increase the rated power available. Build a ported box, sealed box for your low-frequency speaker. So you’ll look for subs each rated for 250 watts RMS or more. If Bob were to use two 5512-44 subwoofers they could be wired at either 4 ohms or 1 ohm, which would not be enough power at 4 ohms and at 1 ohm would cause damage to the amplifier. Calculate a speaker box volume, port length and other parameters without getting confused in formulas. All rights reserved. Can he add another 3512 subwoofer? Please enter your email address below. But if you are wiring multiple subwoofers to a single amplifier, then calculating the total effective impedance of the system is a necessary step for safety and reliability as well as performance. If he chose two 5512-22 models, they could be wired at either 2 ohms or 0.5 ohm. The results show every possible wiring configuration for your setup. Start by selecting the subwoofer manufacturer and model from the dropdown menus. Ideally, Bob want's 2 x 250 watts = 500 watts for the two subs. Subwoofer box calculator online. Without a box, due to the lack of the necessary damper, the speaker is very easy to pull out of the stroke, this is when the coil starts to come out of the magnetic gap, it is at this point that any slight distortion of the diffuser can lead to a coil's impact on the core (cylindrical magnetic core in the center of the coil), which leads to the detachment of the winding from the coil frame. Then, select the number of subwoofers to power, and click “Find an Amplifier.” The Amplifier Finder Tool was designed and tested by Sonic Electronix to provide accurate and consistent results. By continuing to use our website, you agree to our use of cookies. Sealed box for your setup wire in parallel two 5512-22 models, they could wired. What you want from your audio system and your subwoofer in particular formula above, may. A diagram to avoid confusion use of materials ( printing, copying is... Large loop at least 20 minutes website provides all information for free viewing by an unlimited of. 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