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Red Spade Audio June 21, 2017 Rythmik 12" unappetizing pack We now have a standard unappetizing pack for the Rythmik 300W kit: This is designed for the 300W Hypex amp version, which has a slightly larger enclosure than F12. The height is increased to proceeds uneaten volume. Posted by Paul Spencer No comments: Links to this post Email ThisBlogThis!Share to TwitterShare to FacebookShare to Pinterest Rythmik custom curved sub prototype We're offering this prototype build for sale. Contact us to express interest. CAD diagrams show the diamond details which might not be as well-spoken in the photos. Posted by Paul Spencer No comments: Links to this post Email ThisBlogThis!Share to TwitterShare to FacebookShare to Pinterest June 17, 2017 JV60 crossover upgrades It's not unusual for us to receive numerous emails each week asking if we still offer upgraded crossovers for JV60. This is one that we built yesterday: These are hand made with quality parts and the modifications I used as a JV60 owner. The mods were make or unravel in my case, resulting in keeping my JV60 speakers for many years. I unquestionably found the sound to be increasingly enjoyable than many upper end speakers, priced well whilom $10k. The sound is smoother and increasingly refined. Crossover upgrades We unquestionably offer crossover upgrades for any speaker. This includes: Hand built crossovers using the same diamond but upgraded partsDiamondmods to retread the sound to your preferences Modified designs to suit new drivers Custom crossovers for custom speakers Posted by Paul Spencer No comments: Links to this post Email ThisBlogThis!Share to TwitterShare to FacebookShare to Pinterest June 13, 2017 Emerald Rock Studio In most cases, our services are engaged without a vendee has once purchased sensory treatment. Very often we are tabbed in when there is a specific and objectionable problem they were not worldly-wise to solve with generic and self-ruling translating on the internet. Here we started working with the vendee surpassing the studio was built and so this meant we could ensure a unconfined result right from the start.Tonedtraps Most toned traps on the market are weightier described as "low midrange" absorbers. Their effectiveness is typically very limited. Here we built custom toned traps, running floor to ceiling. The traps are 340mm deep and 1000mm wide. One in each corner. The toned traps are resistive and operate deliberately into the mid and treble regions. The wholesomeness here is that they serve a dual function and unquestionably reduce the value of midrange absorbers that would otherwise be required. The traps were built as 8 modules, which were then bolted together once delivered onsite. A remoter wholesomeness of the large depth is that they are increasingly stable. These traps were made with Polymax XHD which we moreover sell as raw panels for DIYers. Vicoustic Wavewood panels are mounted either side of the rear corner toned traps. This space is moreover a wreath practise space. It was important to create a neutral sounding room which was not overly dead. Part of creating this wastefulness was mixing wastage and absorption. Vicoustic Multifusors are installed on the ceiling. These are very cost-effective panels and we like how easy they are to install.Stuffa light weight polystyrene panel, they can be installed with self wrapper picture hanging strips. It's an easy DIY install, which avoids the uneaten forfeit of a professional install job. It was unquestionably this product that first prompted us to wilt a Vicoustic dealer - it was well-spoken that many of our clients needed an easy to install low forfeit diffusor. SVS SB1000 subwoofer set up under the mixing desk. We consider this sub to be a value leader. It's a capable sub with very good performance for the price of a raw suburbanite and amp. Many studios install a cheapie sub and most of them are simply not worth using. The temptation is often there to buy a sub in the $500 - 700 price range. These can only be considered "junk subs." It's a very good idea to spend just a little increasingly for a sub that is far superior. We provided the sub withal with calibration. We tested every feasible sub location, finally opting for the most practical placement with the weightier performance. Here a nearfield location worked best. Very often the placement of the monitors and their relationship with their surrounds can create issues. A very well-judged monitor is hands undermined with poor setup and a hit and miss approach. We worked through various options with placement to determine the optimal setup. Products and services included here: Consultation on diamond and layout of the space prior to constructionSensorytreatment diamond Custom sensory treatment SVS sub Sub integration Audio scale Posted by Paul Spencer No comments: Links to this post Email ThisBlogThis!Share to TwitterShare to FacebookShare to Pinterest June 4, 2017 Point source mini - realising a meaty point source speaker This is a speaker we've wanted to create for some time. Perhaps our most versatile ever. We wanted to create a meaty point source speaker. It would cater to some unique situations: nearfield monitors a small room where a tightly involving sound stage is desired valve and lower powered amplifiers a centre waterworks speaker that can be placed on its side a surround speaker with equal horizontal and vertical dispersion to serve increasingly than one row of seats a premium Atmos ceiling surround speaker (which doesn't measure so immensely the response plot has to be hidden) These are quite diverse situations but all of them goody profoundly from a point source speaker. We decided to embark working on this project and the first step was finding the right driver. One promising suburbanite was the Eminence Beta8CX. The parameters were quite useful and initially it seemed quite well-flavored that any pinch suburbanite with a thread could be tested. We're quite fussy on which pinch suburbanite we use as they are very often make or unravel with HE designs. Price was moreover an lulu feature. We know that people don't tend to spend big on surround speakers, so this was a key issue. The Eminence suburbanite has useful sensitivity and works well in a reasonably meaty enclosure. However, when we tested various pinch drivers, we noticed a serious problem. There is a wholesale 15 dB valley from 4 - 11k. We tried various pinch drivers but all exhibited a similar problem.Planewith the goody of a DSP zippy crossover, the sonic result was poor. One of our requirements was the worthiness to use a passive crossover, where we don't have the option to simply add EQ to a valley this large. A remoter rencontre with coaxial drivers is that they tend to be expensive. Money does not necessarily buy you unrenowned performance. The reality is the coaxial drivers are difficult to get right. Here is an example of one of the largest units: This woofer is mounted in a variegated enclosure so it's not directly comparable in all respects, however, the far superior response in the treble region is clear. Despite stuff one of the best, we can still see some obvious problems. Numerous dips in the woofer response whilom 1k where we are likely to want to navigate to the tweeter. A peak just whilom 4k which is very audible. We can moreover see that the pinch suburbanite has very limited marrow end response. The Game changer Here we have a suburbanite that changes the game. Without this driver, this project would not get off the ground. In unrelatedness to the cheaper stamped steel frame of the Eminence, we have a very solid tint frame. There is no pebbles cap here. An accordion reticulum surround ensures very long life and very tenancy of the cone edges. The pinch suburbanite is integral to the design. Shown whilom is the when of the phase plug and you may moreover notice the copper shorting ring. This wattle provides much largest structuring of the sensory centres. Here we can see the weightier of both previous drivers. The woofer has a well behaved response, self-ruling from the problemmatic dips and breakup of the pro coax. We moreover have a very nicely extended top end without a falling response that needs to be corrected - this makes for a simpler crossover. Overall, a much increasingly usable driver. Our first trial with a very transplanted crossover revealed a musical result - this is a very good sign. Posted by Paul Spencer 3 comments: Links to this post Email ThisBlogThis!Share to TwitterShare to FacebookShare to Pinterest Rythmik Audio Subs in Australia As our long time blog readers will know, we've held Rythmik subs in upper esteem for a long time. We first wits them when in 2006 and it was well-spoken from the first moment they were fired up that these are yacky subs. The very wipe and dry toned sound was well-spoken plane surpassing they had been calibrated correctly. We are now Australian dealers for Rythmik subs. We offer their full range of kits and we moreover custom build finished subs, subtracting Australian-made enclosures to Rythmik kits. Kits Rythmik kits include the suburbanite and servo enabled amplifier. Both are integral to the diamond and sold together only. We moreover offer unappetizing packs, which are CNC machined to fit together and make for an easier build. These start at $399. Our standard designs are modestly sized 12" and 15" sealed subs, however, we can moreover create custom unappetizing packs to suit any project. We can offer: sealed ported unshut thwart horns Custom made subs in Australia We manufacture subs in Australia based on the Rythmik kits. This is one of our 15" subs (sealed). Neo magnets are unseen within the enclosure - they serve to nail the grille without unsightly old clips. Featured here is a custom sub with dual 12" drivers, serving to reduce vibration. The vendee wanted a perspex imbricate instead of a conventional grille. Designed to match the existing entertainment cabinet in solid teak. Posted by Paul Spencer No comments: Links to this post Email ThisBlogThis!Share to TwitterShare to FacebookShare to Pinterest June 2, 2017Zippykeyboard monitors A vendee approached us to help upgrade their music system. This using was unique considering the system would be unfluctuating to a digital keyboard. It could be argued that they wanted to create a live music wits at home, literally. Initially the interest was surrounding an well-judged custom sub. However, when we heard well-nigh the monitors they would be using, the conversation changed. They were intending to purchase some monitors we had worked with before. We do come wideness quite a range of studio monitors in our consulting work. We proposed an volitional custom monitor and the result is seen here. Drivers First we start with an Air Motion tweeter. Well regarded by many for their transparency and air. Of course, a tweeter with "air" in it's name must have air! And it must have motion, or it won't tweet very well. Bad attempts at humour aside, these are tweeters we don't normally use. One of the reasons is that many of them don't suit our designs. Another is that the response is often not as smooth as we'd like. However, in this case, we are using an zippy crossover which can overcome this aspect. Here we offered a nomination between a silk dome and an air motion - they chose the latter. For the midwoofer, we were looking for a smooth response with an extended top end. One particular suburbanite that stood out is the Vifa NE180W-04 6.5" midwoofer. In this regard, this suburbanite is uncommonly smooth out to virtually 14k with the exception of one peak virtually 5k. A curious thing well-nigh this particular suburbanite is the very variegated response shown for the 8 ohm version. Differences are worldwide here but usually they are quite subtle.Moreoverimportant here is the worthiness to unzip reasonable toned extension in a sealed enclosure - unobjectionable to navigate to a sub. Often our goals would suggest a 4" or 5" mid but the toned requirements suggested a larger woofer. We moreover liked the unshut basket design, which is platonic in terms of lamister any coloration. Low diffraction diamond Given the intended use as a nearfield monitor, we considered that thwart whet diffraction on turning is unquestionably increasingly important than usual. We can hands see diffraction effects in our testing and crossover development, but in a typical real world situation, much of what we see becomes swamped by the room effects. In a nearfield situation, what we measure in our testing is closer to what the listener experiences. Room effects are increasingly subtle. In order to minimise diffraction, we did two things. Firstly, we thoughtfully placed each suburbanite with offsets optimised to tame the impact of diffraction on frequency response. Secondly, the thwart edges are rounded, which is expressly important when using a small tweeter without any loading from a waveguide. Here you can see the impact of the roundovers on a 1" tweeter that is mounted in the middle of the box. This is the lattermost case, as this is the worst possible position for a tweeter. Again we've removed the round overs and shown the impact of tweeter position only. We've now moved the tweeter into its final position. Here we can see that now subtracting the round over remoter improves the smoothness (red). Now with the woofer, we compare the impact of the roundovers with the woofer (below). As you can see, the roundover has less effect than with the tweeter. We have little nomination with placement of the woofer but some welding is still beneficial. The woebegone line shows how the final position compares to the middle of the box. There is not a unconfined deal of difference but if we did have a crossover near 2k, we might be facing a challenge. Now we've widow the impact of the roundover and we can now see that it benefits us increasingly than when placed in the centre. The dip virtually 2k is reduced, although the effect is subtle. Enclosure The enclosure we used here is a braced 32mm MDF with separate sealed chamber for the tweeter and DSP amplifier. The walls are internally lined with 15mm rubber sheets. The result is when knocked, it's like knocking on a touchable column. The cabinet is internally filled with sensory material. Here we can see the raw farfield frequency response. In this measurement, the drivers are simply mounted in the enclosure and then tested with no DSP filters in place. We did test with a cap on the tweeter, so its low end roll off has been modified. We see a gentle hump virtually 1k which is moreover seen in the datasheet. The woofer peak at 4.3k is related to the suburbanite itself and is moreover seen in the data sheet. The smaller ripples in the woofer response are +/- 1 dB excluding the unstipulated trend. The tweeter exhibits a rising response. This may be overdue many of the subjective comments well-nigh these tweeters when this isn't corrected. In comparing it to other tweeters, we did notice what sounded like greater deal but moreover a thin sounding marrow end. This measurement explains what we heard. Crossover Here we used a MiniDSP ICE amplifier with two channels for each speaker. The DSP crossover allows for very precise control. One of the things we like well-nigh DSP zippy crossovers is the precision with which we can tenancy the response. Although passive crossovers can be quite sophisticated, we find there are limits to what we can achieve, at times with a difficult compromise between response shaping and part count. With a DSP crossover, we typically have increasingly filters than any diamond is likely to need. Here we have now achieved a response of +/- 2 dB. We moreover evaluated various settings to retread the tweeter level. In this case, we found that a near unappetizing treble response produced the weightier results and the most well-turned sound. One the crossover diamond work was complete, the original weft of the tweeter reverted significantly. The exaggerated top end detail and thin sound was replaced with a very well-turned sound. Still, there was no question that its detail was very appealing. Posted by Paul Spencer No comments: Links to this post Email ThisBlogThis!Share to TwitterShare to FacebookShare to Pinterest Older Posts Home Subscribe to: Posts (Atom) Translate search PSE-144 LSK JV60 crossovers Project showcase DIY Point source horn kit 20 Hz custom HT horn sub Celestion Ditton 66 redesigned CustomZippyMonitors Feedback or questions? Contact > (Click to launch contact form) Follow by Email Popular Posts DIY point source horn Update: DIY point source kit This point source horn combines a unique mix of features that make it very appealing. It has the extremely... Diffuser panels: why you need them and how to make your own An sensory diffuser is often increasingly difficult to diamond and build, hence increasingly expensive. They are moreover a little increasingly difficult to integra... DIY Transmission Line Speakers Update: I'm now offering crossover upgrades. Read increasingly > If you are looking for a upper end transmission line kit, I recomme... 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