Bridge Single
Is it worth it to fill a single coil in a single channel amp 2?
I have a single coil 10 "subwoofer, rated at Connected to a channel 750W amp 2 off 300w/channel. Currently, it is filled, because I thought I could get 600wx1, but a friend told me that if I have one under a single coil, it cannot be closed, or at least it used to sound different if it is wired only 1 channel. I need advice on what I can do to get the best boom for my buck! Ok, I have a combo box and sub amp / im than satisfied, but I; wonder if, because its a single coil, there will be no difference between a bridge connection and a connection to channel Single?
Many people do not realize that unless you have virtually unlimited resources, there will be compromises in the design of a system. If you want a system to produce a large number of SPL (but have limited power or the number of speakers), you probably focus a lot of energy sound in a small group of frequencies. This would allow you to generate the desired SPL and well impress your friends. It would, however, leave you with a system which would be less perfect frequency response and a marginal return at the end of the low frequency spectrum. You can design a system that would produce the desired SPL at all frequencies, but we need more power significantly and speakers that the system above with the narrow peak. Car equipment Stereo Installation is no picnic. Cramming electronics and loudspeakers in the places they were simply not designed to be a challenge for the more knowledgeable installers. And the more exotic the plant the more difficult task. Although each aspect of system design brings a unique set of challenges for the part installation, custom built speaker is probably the most creative part of the installation. Box construction option is exercised regularly by amateurs seeking smooth, deep bass - a thorny issue in the automotive environment. Three types housing that are practical for most automotive applications are the box "sealed", "vented box" box and "bandwidth". Although different in design and operation, these types use the same basic construction techniques. But before you take a saw and a square Joiner is, you have to decide which box best suits your needs. manufacturers recommendations: Many manufacturers recommend that a speaker who will give you a peak as I mentioned earlier. This will give good results for rap music or other heavy bass. If you listen to these types of music, this system can perform satisfactorily. If you listen to all types of music, you'd likely want a speaker that would give a flat response. To get an answer flatter, you can increase the size of the enclosure, but the overall response is not perfectly flat. To build a system that has a frequency response perfectly flat (typically desired by audiophiles), you'll have to take the vehicle into account. When a manufacturer recommends a particular speaker, you should ask yourself (or, better yet, the manufacturer) that the enclosure is optimized for. Case Types: When installing on a system, you must decide what type of speaker to use. No fence is magical. Sealed boxes Simple in design, the sealed box is nothing more than a sealed chamber whose goal is to improve speaker performance. When a subwoofer is installed in one, the sound waves emanating from the front cone speakers are separated from the back-fire oven. It improves the bass response, since the waves may object to cancel each other when they are not isolated. Superb damping, good ability of processing power, and simplicity of construction make the sealed enclosure-box an ideal candidate for a variety of facilities. A sealed enclosure is the smallest (a form of response) and have a good bass extension frequencies, but can extend to lower frequencies. If space is limited, this may be your best choice. Vented Vented enclosures - also known or bass-reflex systems owned - are more complicated than sealed boxes, but additional construction work required to install a vent rewards. ported boxes are more efficient than their counterparts closed because they channel the sound waves from the front and rear of the cone in the listening environment. Other virtues of the design to include a vent better reproduction of deep bass, a response curve rather flat and low distortion - provided that the box is well constructed. A vented enclosure will usually have a lower frequency for a form of response (alignment), but it would require a larger enclosure. If you make the enclosure as small as the sealed enclosure but ported to be low frequency response, the output would deviate from the apartment desired response. Bandpass enclosures of bandpass enclosure can look good and give you a flat response, but most generic cases bandwidth is not designed for flat response. They are designed to impress in stores. This means they are able to produce a large peak at a certain frequency near 60Hz. These boxes work well with something like rap music, but will generally not a good sound with other types of music. If you use a bandpass enclosure, it must be specifically designed for your speakers. If you build your first system, I recommend a sealed enclosure. It is the simplest pregnant and will be easier for get right. A tight enclosure should be the right size and well sealed. Alright ... Enough of my opinions. --------------------------------------------- ----- ------------------------------ System Design The first step in designing a speaker is to determine how much space is available in your vehicle. If you have a hatchback, for example, calculate the cubic capacity of the trap region, bearing in mind that you will always need access to your tire alternative. Available space will dictate the size and shape of the enclosure, which in turn refine your choice of drivers. For example, a 10-inch subwoofer generally requires an enclosure of 1 to 1.5 cubic feet of internal volume for optimum performance, while a 12-inch subwoofer requires 2-3 cubic feet. It is important to note that any recommendation will not take into account the volume to be moved by drivers, dispatchers, internal reinforcements and, in the case of a ventilated system, the port. To compensate for these components, you must build your box slightly larger than your measurements indicate. Generally, it is generally wise to increase the volume by 20 percent. When Determining the shape of your box, keep in mind these "guidelines ideal "dimension: depth must be 0.7 x Width 1.4 x Height and Width. Also, avoid building an enclosure with walls of equal size This could cause a resonance peak in the midbass region. If the enclosure will be irregularly shaped - as most are - it is easier to think of its interior as a collection of classical forms, calculate the volume of each, and add these volumes together. For example, the volume of a box with a front slope is more easily determined by adding the volume of rectangular or square part down to the volume of the triangular portion at the top. Moreover, it is easier to measure in cubic inches, then convert cubic feet to work with numbers alone cubic feet. ---------------------------------------- Calculating speaker Volume ---------------------------------------- As you know, for top speakers (especially woofers) to function properly, they must be in the chamber appropriate size. The manufacturer can not give you the volume of the speaker should but can not give the exact dimensions of a speaker that works in all vehicles. While you can build an enclosure of appropriate size for your vehicle, this page will explain how you calculate the total volume of the enclosure. Magic Number: OK ... This is not magic, but the number is 1728. If you forget, just remember that the number is 12 inches * 12 inches * 12 inches. 12 * 12 * 12 = 1728. Square or rectangular boxes: These boxes are the easiest to calculate the internal volume. Simply measure the height, width and depth (In inches), multiply them together, then divide that number by 1728. If the box has internal dimensions of 6 "high x 12 inches wide x 18" deep, the volume of the box is 1296/1728 =. Pi ³ 75. Cases Wedge: From wedges consist of two forms, a rectangle and a triangle, they are fairly easy to caculate well. Just separate forms, and calculate for each. Use the same method as above for the internal measures of a rectangle, then use (HxWxD) / 2 triangles internal volume. Add these together to get your total interior volume. Area (rectangle) = height x width of the area (triangle) = 1 / 2 x height width of the area (circle) = 3.141592654 x ² radius of the area (circle) Diameter x ² Volume (rectangular box =) region (one side) = 0.7853981634 x Depth Volume (pregnant triangular) = Area (triangle) x Depth Volume (cylinder) = Area (circle) x Depth 1728 Cubic Inches = 1 cubic foot = 1 28 liters per cubic foot if you want to offset the volume occupied by the subwoofer, you can use the following approximations. Keep in mind that these are "normal" woofers. If you use a subwoofer from the competition with a huge frame and structure of the magnet, refer to the manufacturer for the displacement volume real subwoofer. Even if you do not woofers competition, quality manufacturers to provide the highest specification in this woofer the datasheet. 8 "= 0.03 cu ft 10" = .05 cu ft 12 "= 0.07 cu ft 15" = .10 ft ³ pilot several speakers, you'll best performance by isolating each driver in a separate room. This prevents variations in tolerances of speakers and an input power restrict the production system. If the rooms separate building is not possible, you can ensure that each driver receives the same amount power by mounting two identical drivers in the same cavity and wired in parallel, keeping in mind that half of the SAT will be impedance. Given the extraordinary number of choices, selecting the pilot can be a daunting task. It requires an understanding of the characteristics, and a set of pointed ears. For some tips, see "Wire Service" column in the September / October and speak to CSR an experienced installer. Once you select a speaker type and the appropriate drivers, the card design on paper. This will helps to visualize the shape of the enclosure and can avoid unnecessary cuts. Before leaving your faithful because, be absolutely certain that the enclosure fits your vehicle. ------------------------------ -------------------- ------------------------------ Precautions If you choose a tuning frequency above the frequency the lowest that you intend to drive in speakers, the speaker can be damaged due to the absence of damping. Below the tuning frequency, control all depend on the suspension of the speaker. If you drive the amplifier switching, the problem will be even worse. If you are unsure of the frequency of agreement itself, using a sealed box or at least keeping an eye very your woofers for the first few times you drive them with very low scores. You can not have a length shorter than the thickness of the port wood you use. I do not recommend the use of a port diameter of less than 3 inches for the subwoofers. The length of the port should be short enough allow clearance of the port diameter between the end of the port and the wall of the box. If you use a port 3 inches, leaving at least 3 inches between the tip rear port and the wall of the enclosure. If you want to use square ports, use a port that is length times width equals area port. The length of the port will be the same as the serial port. -------------------------------------- ----------- Materials ------------------------------- MDF density fiberboard average is a type of compressed "wood product" is similar to particle board, but is much more "user friendly" to work with as far as chipboard. The woodcuts with less dust and leaves a good clean cut. It also resists chips when screwing near the edge. You should always pre drill screw holes when installing a box with screws because the wood will split if a screw is driven into the end of the plank. Many people use a pneumatic stapler and a glue of good quality wood to assemble boxes. Some people use liquid adhesives type nails to seal the joints, but the solvents in construction adhesives can soften the adhesive used on some speakers (which could lead to premature failure if the speaker enclosures are installed before the glue completely dry). You should also realize that the vapors are flammable (And can be explosive when contained). If you have a connection mobile speakers on speaker terminals, you can have a fire or explosion hazard if the speakers are played before the solvent has completely evaporated. silicone adhesive acetic acid which is released as the glue. This acid corrodes speaker baskets when the speakers were resettled before the silicone has completely cured. The best way to ensure that the housing is sealed is to proceed reductions in quality. It will take less time to make cuts that would be for the leakage / dry cure (24 hours). ----------------------------------------- --------------------------------------- Construction Draw each piece of the enclosure before cutting to you do not waste material. Once the individual sections were cut, temporarily assemble the box to ensure that the pieces fit together perfectly. One option to consider at this stage is the use of internal reinforcements, which, depending on the overall size of the box may result in a sturdy case. Usually, 1.5 "x 1.5" strips equipment will suffice. Generally, you'll need to add that braces for boxes which have internal volumes of more than 5 cubic feet. If all pieces of the puzzle and match the edges, the box is ready for permanent assembly. First check all the joints are free of debris. Then Slowly, a bead of wood glue along the line where you make the first phalanx. Carefully assemble the two pieces and secure with screws or nails. Use one screw every 6 inches or a nail every 3 inches. If you use screws, drill pilot holes to prevent wood from splitting. And for a more polished look, the Strawberry screws. (Note that the type of seal that you select is not critical as the box is strong and airtight.) Continue the assembly of the box, but do not attach the baffle board - which takes the front speakers - until you've done that the housing is sealed. To do this, fill a caulking gun with silicone and a cord along the inside of each municipality. When you are finished caulking box, set the card baffle place. With the box assembled, you are now ready to cut the speaker openings and the vent, if you have chosen a vent design. I always found it easier to work on the wood once the box is assembled. The ventilation tube can be made of plastic, cardboard, or - for a square or rectangular vent - wood. First, calculate the center of each hole and draw a circle of appropriate diameter using your compass. Make 3/8-inch starter holes with a drill, then cut the holes using a jigsaw. Once the President and the port openings are cut, put a little silicone sealant on the tip of your index finger and reach into the chamber for sealing joints within the baffle board. It is very important for the speaker to be completely airtight, the air leakage reduces the ability of the system processing power and the distortion causes. Once the seams are sealed, I recommend covering three adjacent inside walls - back, top and bottom, for example - from 1 to 2 inches of polyfill (available at fabric stores for about $ 1.50 a bag). The use of filler material will minimize midbass resonances. That silicone cure completely for at least 24 hours before installing your submarine. The fumes can actually cuase of your submarine discard. --------------------------------------- ----------- President ------------------------------ sealing around If he has no joints and box speakers are not covered in carpet or vinyl, you can use an open cell foam weather stripping around the cutout in baffles. The weather stripping should be about 3 / 8 to 1 / 2 inch wide and 1 / 2 inch thick. You must ensure that the area around the cut is clean and dry so that the caulk will stick. I recommend wiping It Down with solvent and let dry before applying the caulk. If you really want it to stick, apply one coat of contact cement to the area around the hole and let dry for 10 minutes or until it no longer sticks to your fingers when you touch it. For the implementation of weatherstripping to the paved surface, you only have one chance deposit in the right place. As soon as the weather stripping key contact cement, it will not come back up. ----------------------------------- --------------- ------------------------------ The finished appearance of your case is strictly a matter of personal taste. Although you can not believe it is important, most people want the firm to complete the interior of the vehicle. Phoenix Gold (800 - 445-9229) and the Division Rockford Fosgate AIT (602-967 - 3565) selling tissue for this purpose. 4 Season Carpet Phoenix Gold is available in eleven colors and costs about $ 10 per square meter. Overdrive Perfect Interface is a cross between mat and feel what is available in twelve different colors, you will run about $ 12 per square meter. Your local installer might be able to help there too. Typically, spray adhesives are used for tissue binding to the surface of the enclosure. (3M adhesive spray sells for about $ 8 Cdn.) You will need your razor knife to remove excess material and cut around the opening speaker. You can also use paint or Formica at the end of your case. While Formica looks good, it is very difficult to work with. Painting, on the other hand, is easy to apply, but can make mailbox rough appearance. ------------------------------- ------------------- ------------------------------ mount the drivers before installing the speakers, you'll need to drill some holes. First make a hole in the bottom of the rear panel of the housing for the speaker connector cable. Then put the drivers in their respective holes and mark the location of each screw hole with a pencil. Remove speaker and drill pilot holes. Before proceeding, remove all the wood chips. Snake length generous the speaker cable into the hole at the rear of the enclosure. Then mount the connector of your choice (Radio Shack sells several different types) and, Using your fingers, seal the opening with silicone. Then, attach the speaker cable into the connector. If you do not use connectors (In the case of a permanent installation, perhaps), a node in the speaker cable to where it exits the chamber. Now mount your switchgear and son of the speaker cables. (Remember, no polarity.) With all the cables in place (I recommend soldering), Secure pilots in the baffle board, using extreme caution - the last thing you need at this stage is a screwdriver-size hole in the speaker. Covering the speakers with some type of grid can be a good idea considering the location of the box in your vehicle. ---------------------------------- ---------------------------------------------- Using T-Nuts If you have very heavy woofers will need to remove your woofers frequently, you'll need use T-nuts. T-nuts are threaded metal fasteners that are used to provide a solid attachment point in the wood. They are inserted into the back of the card chicanery. A hole is drilled just large enough to accept the cylindrical part of the T-nut You insert the T-nut in hole and (if possible) give a good solid hit with a hammer. If you are unable to hit her with a hammer, they can sometimes be pulled up by simple tightening the screws. This works well on softer woods, but will not always work with MOF. Sometimes the band son or screws break before the T-nut is in place. If you have problems to get them to take all down, using a C-clamp to seat them. If you do not bring it to sit down before mounting the speaker, the screws will continue to loosen the nuts T continue to pull down. Only after they are in place will stay tight screws. ---------------------------------------------- ---- Securing housing ------------------------------ Once your box is full, the next step is to secure the vehicle. A close inspection of the area surrounding the enclosure will help you determine the best and safest ways to achieve it. L-brackets are usually sufficient, or you can remove the drivers and bolt the box directly on the vehicle. If you choose this latter approach, be extremely careful when drilling holes. It's amazing how much damage may be caused to a vehicle If you are not watching where you're drilling. (Do not forget the gas tank.) The last step: Connect your new creation to its power source and press the play button on your radio. Now you can give yourself a pat on the back to improve the performance of your car sound system. I built many enclosures over the years, and with each, I took a new turn or two. Patience is the key but it is even more important to talk to manufacturers and experienced installers. Following their directions are sailing smoothly on the road to good sound. ------------------------------------ -------------------------------------------- Forms and other tips you should always correspond RMS (Root Mean Square) watts per channel of Subs and AMP as well (impedance resistors). For example, if your amp is rated at 4Ω not exposed to 2Ω, fry it. The formula of submarines in parallel: Z = 1 / (+ + + 1/sub1 1/sub2 1/sub3 ....) For series, just add them up (sub1 sub2 + + ...). You can mix and match these equations to obtain the right impedance required by your amp. Example 1: Amp is 2 channel and rated at 4Ω bridged, 4 subs @ 4Ω each. If I connect two parallel and two in parallel and connect the two pairs in series, I would have a total impedance (resistance) of 4Ω. So for the amplifier is just a sub in bridged mode. Example 2: Amp is estimated at 1Ω Mono, 2 subs @ 4Ω each double coil. If I connect both coils in parallel and both other coils in series and connect the two subs in parallel, I would have a total impedance of 1.6Ω. This would be perfect for a mono amp stable 1Ω. You must use a capacitor as well. They help "stiiffen" the power of your battery can not provide, and the lengthening of the life of your equipment and the electrical system .. Recommend to 500 watts MAX you are using a 0.5 Farad cap Example: 1000 watts MAX - 1 Farad cap You will also need what is called a level line "converter" If your car has no RCA outputs or your stock amp does not have high level inputs. length calculations Port tube: input = Radius of Port (R), tuning frequency in Hz (FB), box volume in cubic inches (Vb), (L) be the resulting length tube. (1.463 x 10 ^ 7 XR ^ 2) = ------------ (Fb ^ 2 x Vb) - XR ----------------- 1.463 ----------------------- -------------------------- -------------- inrush and Wire Gauge Power Chart --- --------------------------------------------- --------------------------- ----- Look for this when buying an amp ... CEA-2006 Compliant On May 28, 2003, the Consumer Electronics Association published standard CEA-2006, "Test & Measurement Methods for Mobile Audio Amplifiers." This "voluntary" standard advocates a uniform method for determining the RMS power amplifier and the signal to noise ratio. Using 14.4 volts, watts RMS are measured in a load impedance of 4 ohms at 1 percent total harmonic distortion (THD) plus noise, a range of frequencies (for amplifiers General purpose) from 20 Hz to 20,000 Hz Signal to Noise is measured in decibels absolute weighted (dBA) at a reference of 1 watt into 4 ohms. It applies to both external amplifiers and the amplifiers of the dashboard in receivers. If an amp does not have this rating, it may not produce the wattage indicated! -------------------------------------- ------------ Some unknown truths ------------------------------ Some people get really confused with some aspects of mechanics how subwoofers and amplifiers work. There are even meaner than underpowering myths as a result of damage. Too little power will only cause the level Maximum output should be low. Abuse and "failure wingnut" (an idiot) connected to the speakers, volume control amplifier low blow fed. If driving a speaker of low power would make them fail, the speakers would not every time you turn the volume on the radio. Clipping and distortion of clipping is a form of distortion that occurs when an amplifier is saturated, what happens when he tries to increase tension or current beyond its limits. Distortion refers to any type of deformation of a waveform, compared to entry. Table above shows an oscilloscope screen of an amplifier "clipping". The amplifier output should be a clean sine wave, but Instead the top and bottom of the wave is turned off, or "cut". This can be observed because the ups and downs of the waves, which must be rounded, are flat. The term "clipping" is used because the top and bottom of the waveform visually appear to have been "cut" with a pair of scissors. When an amplifier is asked to create a signal greater than its maximum capacity, it will amplify the signal up its maximum capacity at which the signal will be amplified no further. As the signal simply "cuts" or "clip" the ability Maximum amplifier, a signal is said to be "cut". The extra signal which is beyond the capacity of the amplifier is simply cut, resulting in a fixed signal. Note that this fixed signal suffers from other forms of distortion, such as total harmonic distortion. Because the form wave-cut an area below the smaller unclipped waveform, the amplifier produces more power in case of clipping. This additional power can damage a part of the enclosure, including the cabinet or tweeter. The clipping introduces additional high frequency components, which means the signal will be cut more weight to high frequencies that the signal clipping. Some people believe that weight is more acute hazardous tweeters. Others believe that it is not dangerous, noting that music recordings sometimes have normal acute energy and yet does not damage tweeters. Here are some more unknown truths: I can drive speakers with 100% square wave cut all day without problems as the limits thermal and mechanical properties of the speaker are not exceeded. I can feed a speaker 100% distortion all day without damage to the extent thermal and mechanical limits of the speaker are not exceeded. I can exceed the thermal and / or mechanical limits of a speaker and watch it fail in the short term. These are electrical and physical truths and anything else is a myth. ------------------------------------------- ------------------------------------- My projects (below) are an area of Band passbass 4th order (AKA SLR tape), which holds two 12 years. There also plans for a fan cooling system with an automatic thermostat, a fuse and an indicator of 4th order Linkwitz-Riley 33 Hz high pass filter at 24 dB / Octave. The image quality is not good here, but if you want I'll provide it for free. Any e-mail me at --------------------------------------- sparky3489@yahoo.com ----------------------------------------- I chose my Blaupunkt subs TSw1200 with Sony Xplod XM2200GTX. Amp is 1200 watts (200 watts RMS X2), submarines are 600 watt (200 watts RMS), the CAP is 1.5 Farad W / Digital reading SPL is about 112 dB Total cost (so far) = 410 5:37 p.m. $ Permalink Trackbacks (0) Blog it Permalinkhttp: / / spkrbox1.spaces.live.com/blog/cns! 7E8A7A27CB8AE19C! 141.entry Photos | My Assistant BoxJuly 02 pic1 Photo 1 of 16 SlowerFasterComments (0) | Close All Comments (0) More albums (2) My Sub Box (16) On July 2 and electrical wiring - patterns (8) July 25