I need to do a refresh pass on all the promotional and print assets for Genet Models and see what needs to be done to get it all up to date for 2016. That shouldnt take me more than one or two weekend days. "SR 177" redirects here. For "State route" or "State road" number 177, see. List of highways numbered 177. The, saunders-roe.1s project to develop a combined jet - and rocket -powered interceptor aircraft for the, royal Air Force (RAF) and, royal navy. It was an enlarged derivative of the. Saunders-roe.53, which was itself an experimental combined jet-and-rocket interceptor aircraft. The.177 principally book differed from the smaller.53 in its adoption of a nose-mounted airborne interception radar unit, which allowed it to scan for and lock onto its own targets; a more powerful turbojet engine was also incorporated.
Running the sp95s-V4 from a copland cta505 valve power amplifier in triode mode and a home-made valve pre-amplifier makes this coloration less pronounced, so be sure not to have some aggressive front-end driving this speaker. Sorry for the downtime! I added extra backend functionality today for future workbench posts, a product catalog display, and product information page templates with buttons that point to wargame vault, rpgnow, and Drivethrurpg. The catalog and product page stuff are for future new model releases, and the workbench stuff is for keeping all future workbench posts organized, searchable, and browsable in a nice tidy archive for visitors. I think ive crossed everything off my website to-do list! The model Archive downloads are well behaved. Model Archive now has a central landing page instead of an unwieldy dropdown menu. Site redesign is done, workbench support is done, catalog and product page stuff for future releases are done.
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Swapping back and forth it becomes apparent that the harshness to vocals singing loud is clearly reduced from the 8531 driver. It's doesn't have that sometimes ear-shredding type of distortion as heard from the 8535. Impedance and phase of SP95 from series and parallel filters. I'm afraid this is where it's going to end for the time being. Well, i'm not really sure this 8531 driver was meant to perform in a two-way system up.5 khz. Rather in a three-way system.
A classical set-up would be the 8531 the new 12M sliced paper driver from ss with a point of crossover at some 800 hz -or a rather more modern three-way system with the 15M for midrange taking over at 300-400. The sound from this series-V4 is very transparent and with good tonal balance but I still think the 8531 has a certain "paper-sound". Too much lushness, if you get my meaning. Almost a classical jbl sound despite having a rather flat response requirements contrary to the old jbl speakers (I'm thinking of the L100). I feel very tempted to coat the 8531 driver, but applying coating material to a 300 us driver is a one-way ticket and you may end up ruining the driver. I'll have to consider this carefully. I'm sure some people will say that this is just what they want, and others will notice the "sound" ( colouration) from this 8531 driver giving too much sparkle to a piano note or a vocal performance.
This doesn't look too serious and this driver has a midrange quality that actually makes you consider leaving it there. But the sound is very much right in your face and it's too much in the long run. It's just not natural despite the gain in see-through capability. Without the notch filter you can hear every faint cough from a live audience. The addition of the notch filter can certainly be heard and it adds to the naturalness of voices and instruments.
The current set-up targets the bbc-dip and the apparent drop in tweeter level is in no way felt the way it looks. Having a pair.5 clone identical cabs I reinstalled the.95 set-up. Quite interesting and exiting to hear it again. These speakers sound quite different and I have some trouble describing the sound. I have gone through a number of vocal recordings and two things become apparent: The 8531 (still series filter) has some presence effect, where the.95 has a more lean and distant sound, actually a tonal balance that I think is quite good. But, the 8531 has warmth in the lower midrange and upper bass that makes the.95 sound "smaller" and "thinner". The.95 sound somewhat "cool" - in the sense of cold. The differences in vocal presentation are tricky.
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So i added a mild midrange notchfilter to smooth the performance. Left: SP95, spl response, red V4 series filter. Blue parallel filter (crossover not shown). Readings not normalised for.8 volts/1 meter. System sensitivity 86 dB/2.8 volts/1 meter. Right: Impact on midbass response from midrange lcr notch filter. The mom red graph is without the notch filter.
Bottom panel lifted 4 cm allowing crossover to paper be placed here. Tweeter has it's own chamber. The Crossover, back to index, sP95s, series filter, version. Complete speaker kit available at Jantzen Audio: download kit sales presentation here. Measurements, back to index. Initially i have run the crossover without a midrange notch filter. However, it is apparent that the midrange, hz, is a couple of dBs too loud.
vent, but this leaves too little space between the vent and front panel. I recommend a 60 x 140 mm vent from Monacor, br60tr, 60 x 140. This will fit perfectly well with the intended tuning frequency. Or calculate a new vent length from: New vent length 210 * (new cross section area in cm2/40.7). Driver placement, cabinet damping: Please read here general advise on damping of a 24-32 litre floorstander:. Test cabinets, 33 liter vented, port tuning. Chamfering of the bass driver hole to provide proper ventilation. Cabinet bracing and bitumen pads on internal walls.
Has Scan-Speak really been able to improve make a non-coated paper cone with these properties. Indeed the 18W/8531G00 is a remarkable driver. At this point in time it is being tested in a 33 litre cabinet with a port tuning of 33 hz, vent 60 x 140 mm (ID x L) placed 30 cm above floor level including base support, and the bass from this set-up. I have never experienced such a rich and articulate bass from a single 6" driver. In addition to this, the 8531 has the low-midrange weight and warmth the 8535 is short. Series and parallel crossovers have been constructed to gain similar frequency response and to compare the performance of the two speakers. The sonic impact of the two filters on the resulting sound has been very confusing. Despite very close response profiles, the sound is very much different. The series filter has an immediate appealing sound with lots of see-through capability where the parallel filter gave rather confusing results.
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Sliced paper sp95 18W/8531G00 ScanSpeak d2905/9500, copyright Troels resume Gravesen, crossover. Cabinet, measurements, speaker kit, actually this is a 9700 tweeter. The copper plating of the pole piece is seen through the dome. But it's supposed to be the 9500. The 18W/8531 driver has long been on my wish list. Everything about this driver looks good. The ts data suggest impressive bass performance and the response curves do not appear to have any serious break-ups as seen from so many other drivers. A slightly elevated spl response from 1 - 8 (!) khz should be easy to control in the crossover.