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NEP New England Providore Subs
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<blockquote data-quote="Dan-NEP" data-source="post: 8529234" data-attributes="member: 671355"><p>To answer the questions about our coil design.</p><p></p><p>The coil was designed to minimize inductance. If you look at our 750W version, it has a 2.5" single 4 ohm coil with a 20mm Xmax. It has an inductance of 1.55mH. That is incredibly low! In combination with the two shorting rings inside the motor assembly, the end result is a super-smooth and accurate frequency response. I know that a 2.5" diameter coils seems small, and I know people do like dual coil designs, but I was not going for more of the same here. You can get this from any number of companies. I was designing for ultimate sound quality, and this is the coil that satisfied my requirements. You can certainly hear the difference once you listen to it. It is much more responsive to an EQ or DSP than most mid to high excursion subwoofers. You can do a lot to shape the sound, or just add a lot of boost if that is what you are after.</p><p></p><p>Xmax was intentionally chosen to be 40% longer than this subwoofer needs during its natural maximum excursion at 1200W RMS so you can add boost. The natural excursion you get with this design is lower than most subwoofers. This adds to improved sound quality. The less it has to move the cone, the more accurate it will be. Lower excursion at the same frequency under the same power will only help a subwoofer in the SQ department. We are currently doing some comparison tests with similarly priced subwoofers.</p><p></p><p>When it comes to heat: The motor assembly is very well vented, and the entire cone assembly acts as a heat sink due to having an anodize aluminum coil former and carbon reinforced pressed paper cone. The 2.5" coil can easily handle up to 1200W RMS all day long.</p><p></p><p>We will consider dual coil options down the road, and single 2 ohm is definatly a possibility, but there are a lot of things involved in changing the coil and still retaining the same characteristics that make this design work so well.</p><p></p><p>Another thing that we considered is that amplifiers generally have a lower level of output distortion at 4 ohms vs 2 or 1 ohm. All of these things add up to create a fantastic sounding system. The sub-bass blends very easily with the mid-bass, and you can play a much larger variety of music without having to constantly adjust your EQ settings. Everything sounds smooth with great impact, and yes, these do get pretty loud. //content.invisioncic.com/y282845/emoticons/smile.gif.1ebc41e1811405b213edfc4622c41e27.gif</p><p></p><p>Dan</p></blockquote><p></p>
[QUOTE="Dan-NEP, post: 8529234, member: 671355"] To answer the questions about our coil design. The coil was designed to minimize inductance. If you look at our 750W version, it has a 2.5" single 4 ohm coil with a 20mm Xmax. It has an inductance of 1.55mH. That is incredibly low! In combination with the two shorting rings inside the motor assembly, the end result is a super-smooth and accurate frequency response. I know that a 2.5" diameter coils seems small, and I know people do like dual coil designs, but I was not going for more of the same here. You can get this from any number of companies. I was designing for ultimate sound quality, and this is the coil that satisfied my requirements. You can certainly hear the difference once you listen to it. It is much more responsive to an EQ or DSP than most mid to high excursion subwoofers. You can do a lot to shape the sound, or just add a lot of boost if that is what you are after. Xmax was intentionally chosen to be 40% longer than this subwoofer needs during its natural maximum excursion at 1200W RMS so you can add boost. The natural excursion you get with this design is lower than most subwoofers. This adds to improved sound quality. The less it has to move the cone, the more accurate it will be. Lower excursion at the same frequency under the same power will only help a subwoofer in the SQ department. We are currently doing some comparison tests with similarly priced subwoofers. When it comes to heat: The motor assembly is very well vented, and the entire cone assembly acts as a heat sink due to having an anodize aluminum coil former and carbon reinforced pressed paper cone. The 2.5" coil can easily handle up to 1200W RMS all day long. We will consider dual coil options down the road, and single 2 ohm is definatly a possibility, but there are a lot of things involved in changing the coil and still retaining the same characteristics that make this design work so well. Another thing that we considered is that amplifiers generally have a lower level of output distortion at 4 ohms vs 2 or 1 ohm. All of these things add up to create a fantastic sounding system. The sub-bass blends very easily with the mid-bass, and you can play a much larger variety of music without having to constantly adjust your EQ settings. Everything sounds smooth with great impact, and yes, these do get pretty loud. [IMG]//content.invisioncic.com/y282845/emoticons/smile.gif.1ebc41e1811405b213edfc4622c41e27.gif[/IMG] Dan [/QUOTE]
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