I'm too lazy to search and post links, but if you do a little searching on this forum or the internet at large you will find its one of the most well regarded small format tweeters available at any price point. Like. Midbasses: Dayton Designer DSA175-8 6. They do not accidentally costs more. Midbasses: Dayton Designer DSA175-8 6. I'm too lazy to search and post links, but if you do a little searching on this forum or the internet at large you will find its one of the most well regarded small format tweeters available at any price point. 06 + $30. Front - BliesMa T25S-6, Xcelsus XXM325, SI TM65mkIV / Rear - HAT Unity U61-2v2 / Sub - 2X SQL-12. Joined Sep 18, 2019 Messages 691 Likes 346. Purifi also launched an 8" which looks rather decent. 532,00 лв. T25s-6 can be used in a custom wg (i can 3d print it), do not have graph here. Save. Subs: 2 x Scanspeak Discovery 10" in Underfloor Sealed Enclosure. Midbasses: Dayton Designer DSA175-8 6. This Test Bench combines three new 25mm high-frequency transducers from German brand BlieSMa into a single characterization: the BlieSMa T25S-6 Silk Dome, the BlieSMa T25B-6 Beryllium Dome, and the BlieSMa T25D-6 Diamond Dome. €186. £420 . 5" in Ported Underseat Enclosures. Tweets: Bliesma T25S-6 Silk-Dome 1" (Modded Factory A-Pillar Locations). Davis Acoustics Electro. Based in the UK but can post within Europe. Me too. Midbasses: Dayton Designer DSA175-8 6. Thanks to a fully saturated neodymium. Subs: 2 x Scanspeak Discovery 10" in Underfloor Sealed Enclosure. The measurements of a pre-production sample of the BlieSMa T25B-6 tweeter. Tweets: Bliesma T25S-6 Silk-Dome 1" (Modded Factory A-Pillar Locations). Rear chamber seals the speaker and forms an internal cavity filled with a sound absorber of natural. Midbasses: Dayton Designer DSA175-8 6. This edition's Test Bench characterizes three new 25mm high-frequency tweeters from BlieSMa, using silk, beryllium, and diamond domes: BlieSMa’s T25S-6, T25B-6, and T25D-6. 07-02-2020 #3. The BlieSMa pre-production fabric dome T25S-6 tweeter sample measurements: BlieSMa T25S-6 (pre-production sample) | HiFiCompass. Save. View Profile View Forum Posts Private Message. Looking for a 9887 or 300. They put in a lot of time and gave us a lot of solid preforming waveguides for diy. 5" in Ported Underseat Enclosures. View Profile View Forum Posts. In this edition, Vance Dickason writes about the range of DSP Active Line Level Crossovers available from Danville Signal. BlackStar said: BlackStar said: As previously mentioned the tweeters from the Focal ES 165KX2 set are Aramid Fiber, not Silk and not true domes, but a "M" cone. Reactions: nyquistrate. Any idea guys for a silk tweeter 2000 hz XO ; > to 90dB/2. 91. 5" in Ported Underseat Enclosures. 0W04-01A midwoofer. Subs: 2 x Scanspeak Discovery 10" in Underfloor Sealed Enclosure. 16 g), offering better transient responce and higher efficiency. 5X midwoofer two-sample SPL comparison. Subs: 2 x Scanspeak Discovery 10" in Underfloor Sealed Enclosure. Amps: Biketronics BT4210 (210 x 4 mids/tweets), Biketronics BT3725 (250 x 2 midbasses, 700 x 1 sub). 5" in Ported Underseat Enclosures. They’re making bold claims about the sound quality. 5" in Ported Underseat Enclosures. I'd like to introduce a new to me (and to you) - 1998 Mustang GT. T25s-6 can be used in a custom wg (i can 3d print it), do not have. Facebook/HiFiCompass. Midbasses: Dayton Designer DSA175-8 6. This project uses the BlieSMa T25S-6 silk dome tweeter. 2 ohms Voice Coil Inductance. 91/ea Buy 1 for $281. Midbasses: Dayton Designer DSA175-8 6. I just got the bliesma t25s-6 silk tweeters from audiostatus. €376. . BlieSMa T25S-6 25mm Silk fabric dome tweeter 6 Ohm Main feature of Bliesma T25S-6 tweeter is extremely low moving mass (0. The part i find. 9. 2014 Ram 1500, 8. Accuton C173-6-191 CERAMIC MIDRANGE DRIVER. 16 g), offering better transient responce and higher. Smitty. Save Share. 5" in Ported Underseat Enclosures. DVD-Audio Blu-Ray-Audio 2. Main feature of Bliesma T25S-6 tweeter is extremely low moving mass (0. tweets undetermined and feel free to throw out suggestions. Save. Really didn't want to tackle door enclosures but it seams the way I'm heading. 16 g), offering better transient responce and higher efficiency. PURIFI 1ET400A 1x425W Eigentakt Amplifier Module; PURIFI PTT4. Running around 3200ish and up Steg mss3 200-3200hz Midbass in doors for now will be some audison AP8 i have Will upgrade them to probably Aries sk8 IB in kicks. Tweets: Bliesma T25S-6 Silk-Dome 1" (Modded Factory A-Pillar Locations). 02-03-2020 #25. Reply Quote. wchang said: Yes the offset corresponded (nearly) to the 1st-order HPF frequency so in-phase there but of course nowhere else. Figure 16: Purifi PTT6. Thanks!Mids: Satori MW13P-4 5" (Factory Door Locations). 28K views 9 months ago. Flush mounted surround (also made of fabric) and rear mounted magnet system result flat frequency response and wide off-axis diagram. Click here to go to website and download data sheet here. Subs: 2 x Scanspeak Discovery 10" in Underfloor Sealed Enclosure. $435. Tweets: Bliesma T25S-6 Silk-Dome 1" (Modded Factory A-Pillar Locations). BlieSMa T25S-6 25mm Silk fabric dome tweeter 6 Ohm Main feature of Bliesma T25S-6 tweeter is extremely low moving mass (0. 2015 GMC - BliesMa T25B pillars, Dynaudio e430 dash, dual Dayton 7" ES180-Tia woofers in aperiodic door boxes, underfloor sub box Alpine R 15", Stock HU ->NavTV->Helix Ultra, Brax, RF amps 2006 Chrysler 300c - BliesMa T25B pillars, Xcelsus XXM325 Dash, Satori 9. Wavecor TW022WA05 Fabric Dome tweeter. Click here to go to website and download data sheet here. Thanks. bilboaudio Discussion starterОписание на продукта. T25B-6 = beryllium. Tweets: Bliesma T25S-6 Silk-Dome 1" (Modded Factory A-Pillar Locations). It features a natural silk dome with a variable thickness, which provides a smooth and extended frequency response. Спецификации Артикулен номер T25S-6 Тип високочестотен високочестотен високочестотен високочестотен. BlieSMa T25S-6 25mm Silk fabric dome tweeter 6 Ohm Main feature of Bliesma T25S-6 tweeter is extremely low moving mass (0. bnae38 Discussion starterTweets: Bliesma T25S-6 Silk-Dome 1" (Modded Factory A-Pillar Locations). Midbasses: Dayton Designer DSA175-8 6. Compact tweeter with 25-mm silk dome. 532,00 лв. Front - BliesMa T25S-6, Xcelsus XXM325, SI TM65mkIV / Rear - HAT Unity U61-2v2 / Sub - 2X SQL-12. 5" in Ported Underseat Enclosures. BlieSMa T25S. Subs: 2 x Scanspeak Discovery 10" in Underfloor Sealed Enclosure. 5" in Ported Underseat Enclosures. SOLD SOLD SOLD SOLD SOLD SOLD SALE PENDING FS Bliesma T25A-6 Tweeters ONE MATCHED PAIR BNIB; ONE PAIR SOLD Hello, I bought these pre-covid for a build that was put on hold indefinitely. В наличност: 0 бр. Subs: 2 x Scanspeak Discovery 10" in Underfloor Sealed Enclosure. 2 and 2150am on my front. SQ, features, etc. Compact tweeter with 25-mm silk dome. 5" in Ported Underseat Enclosures. . Save Share. Testing 34 mm AlMg dome T34A-4 from BlieSMa/Germany. Im at my whits end with my freaking tweeters popping when turning on. Subs: 2 x Scanspeak Discovery 10" in Underfloor Sealed Enclosure. View Profile View Forum Posts Private Message View Articles. Спецификации Артикулен номер T25S-6 Тип високочестотен високочестотен високочестотен високочестотен. 1; 2; Next. 02-04-2021 #6. 10-22-2020 #23. Спецификации Артикулен номер T25S-6 Тип високочестотен високочестотен високочестотен високочестотен. Distortion differences from 3-10kHz are there because of dome material and its behaviour at the end of the spectrum - everything else is the same but that. BlieSMa T25S-6 Silk Dome Tweeter Matched Pair. Besides BlieSMa, Purifi is another state of the art manufacturer and their 6,5" Alu woofer is being well received with very low IMD and overall low distortion. Subs: 2 x Scanspeak Discovery 10" in Underfloor Sealed Enclosure. Комплект уеднаквени текстилни високотонови Bliesma T25S-6. 6 ohms. Would be to see which one fits in a waveguide. Product Details. 2014 Ram 1500, 8. 1 - 20 of 33 Posts. Beryllium domes may have similar on-axis response like soft domes, but the off-axis is usually different. Комплект уеднаквени текстилни високотонови Bliesma T25S-6. Tweets: Bliesma T25S-6 Silk-Dome 1" (Modded Factory A-Pillar Locations). 560,00 лв. Stanislav Malikov has a history at Accuton and Morell companies and has started his own production of this unusual large aluminum/magnesium dome and offered me a pair for testing. From my understanding of how we hear (we sum direct and indirect sound) the 2000Hz crossover worked better for imagining and details because. £420. Go to Beryllium version. It is the measurements of a pre-production sample of the fabric dome tweeter T25S-6 kindly provided by BlieSMa company for independent testing The THD measurements at voltage levels 2. They're angle-mounted on the sail panels of an '07 Mazdaspeed 3, getting 100 watts (somehow I don't think their using half that, yay headroom?). KLON ASORTYMENTU BlieSMa M74A-6 Mid-range woofer; BlieSMa T25S-6 Dome Tweeter Matched Pair; Audax. In stock 0 pcs. 560,00 лв. 8 g. Midbasses: Dayton Designer DSA175-8 6. Комплект уеднаквени текстилни високотонови Bliesma T25S-6. 5" woofers in aperiodic door boxes, AE IB15, Joying Android HU->Helix Pro2. 94db, 6ohm. 6L 2V, "modular" engine from the Romeo plant, 4R70W automatic transmission, Bright Atlantic Blue paint,. Find Members Posts. 5" in Ported Underseat Enclosures. В наличност: 0 бр. Subs: 2 x Scanspeak Discovery 10" in Underfloor Sealed Enclosure. 5" in Ported Underseat Enclosures. 5" in Ported Underseat Enclosures. $281. Technical & Advanced Car Audio Discussion. BlieSMa T25S-6 25mm Silk fabric dome tweeter 6 Ohm Main feature of Bliesma T25S-6 tweeter is extremely low moving mass (0. 5" in Ported Underseat Enclosures. BlieSMa: T25S. 13 December 2019, 12:16 Friday. Satori MD60N-6 . Subs: 2 x Scanspeak Discovery 10" in Underfloor Sealed Enclosure. 560,00 лв. Subs: 2 x Scanspeak Discovery 10" in Underfloor Sealed Enclosure. 5" in Ported Underseat Enclosures. Subs: 2 x Scanspeak Discovery 10" in Underfloor Sealed Enclosure. Not because it is better or worse than a similar beryllium tweeter, but because it has a slightly different sonic signature and can better satisfy the tastes of audiophiles who gravitate to a "softer" sound. Save Share. BlieSMa T25S-6 25mm Silk fabric dome tweeter 6 Ohm Main feature of Bliesma T25S-6 tweeter is extremely low moving mass (0. Комплект уеднаквени текстилни високотонови Bliesma T25S-6. Комплект уеднаквени текстилни високотонови Bliesma T25S-6. 5" in Ported Underseat Enclosures. Tweets: Bliesma T25S-6 Silk-Dome 1" (Modded Factory A-Pillar Locations). Bliesma T25B. Save Share. 5" in Ported Underseat Enclosures. 213. Most likely will pick up the Beyma 10G40 for the doors from 125-500Hz. Just compare the normalized frequency response measurements on hificompass. For sale here is a pair of Bliesma T25B-6 Beryllium dome tweeters bought for a project a while back but never got round to using them. shootmedmmit. #3. Midbasses: Dayton Designer DSA175-8 6. Id like to see if any drivers are common. IMPORTANT NOTE !!! Our official distributors in Europe are : Bliesma T25S-6 Silk-Dome 1" (Modded Factory A-Pillar Locations). 5" in Ported Underseat Enclosures. Scanspeak 6640,. Testing 34 mm AlMg dome T34A-4 from BlieSMa/Germany. Register; Login; Place an Ad Free for hobbyists! Hardware . 4 uConnect, Minidsp 8x12dl Helix A6 Competition, Gladen rc70c4, 2x Sundown SAE-2000v3 Front - BliesMa T25S-6, Xcelsus XXM325, SI TM65mkIV / Rear - HAT Unity U61-2v2 / Sub - 2X SQL-12. Read More. 10-28-2020 #3. Tweets: Bliesma T25S-6 Silk-Dome 1" (Modded Factory A-Pillar Locations). Visit Members Homepage. #13. Midbasses: Dayton Designer DSA175-8 6. 5" in Ported Underseat Enclosures. Midbasses: Dayton Designer DSA175-8 6. 31 (excl. Фирмата е официален представител на Mundorf, Bliesma, SB Acoustics, SB Audience, Hivi. The box uses edge moulding to form the 44mm radius. High-sensitivity tweeter with 34-mm beryllium alloy dome. 1 - 19 of 19 Posts. Mids: Satori MW13P-4 5" (Factory Door Locations). . 83V ; as detailled as the metal SB26CDC to challenge it, please ? Budget less than 250 euros/USD max the pair MTM with 5" hard paper. Midbasses: Dayton Designer DSA175-8 6. Flush mounted surround (also made of fabric) and rear mounted magnet system result flat frequency response and wide off-axis diagram. The THD measurements at distance of 315 mm and voltage levels 2. Midbasses: Dayton Designer DSA175-8 6. supermaxx123 Discussion starterMids: Satori MW13P-4 5" (Factory Door Locations). BlieSMa T25S-6 Silk Dome Tweeter Matched Pair. Clearly there is an issue here, which is disappointing. Комплект уеднаквени текстилни високотонови Bliesma T25S-6. Really excellent tweeters, I just prefer my T26B berylliums a tad better. 60 * Free shipping! Compact tweeter with 25-mm silk dome. Спецификации Артикулен номер T25S-6 Тип високочестотен високочестотен високочестотен високочестотен. Flush mounted surround (also made of fabric) and rear mounted magnet system result flat frequency response and wide off-axis diagram. 16 g), offering better transient responce and higher efficiency. Now let's look at the behavior of the T25S-6 used in the speaker (again compared to an ideal tweeter): I plan to buy bliesma t25s-6 silk dome, and I already own SBA satori tw29txn-b textreme tweeter. 560,00 лв. Will update post with pics and impressions after they are installed and I update my Dirac tune. Tweets: Bliesma T25S-6 Silk-Dome 1" (Modded Factory A-Pillar Locations). Midbasses: Dayton Designer DSA175-8 6. Condition: New New. Tweets: Bliesma T25S-6 Silk-Dome 1" (Modded Factory A-Pillar Locations). Tweets: Bliesma T25S-6 Silk-Dome 1" (Modded Factory A-Pillar Locations). No, it i a special midrange unit! Features : • 142 mm aluminium/paper dome developed together with Dr. 560,00 лв. The THD measurements at. Midbasses: Dayton Designer DSA175-8 6. Спецификации Артикулен номер T25S-6 Тип високочестотен високочестотен високочестотен високочестотен. 560,00 лв. We may earn a commission for products purchased through links on this pageClassified: FOR SALE - Bliesma T25s-6 pair asking for $420. 74 mm Beryllium dome. The measurements of a pre-production sample of the BlieSMa T25A-6 tweeter. Kurt Müller GmbH & Co. Build quality is superb. 16 g), offering better transient responce and higher efficiency. BlieSMa T25S-6 Silk Dome Tweeter Matched Pair. BlieSMa T25A-6, T25B-6, T25D-6, T25S-6. Reply Quote. Reply. Midbasses: Dayton Designer DSA175-8 6. It will be a 2way + rearfill and sub. Highlights. 560,00 лв. While expensive I find that newcomer is a breakthrough in large dome medium driver for a long time. • Extremely low moving mass for better transient response and higher efficiency. BliSMa. 5" in Ported Underseat Enclosures. View Profile View Forum Posts Private Message. Subs: 2 x Scanspeak Discovery 10" in Underfloor Sealed Enclosure. 560,00 лв. The measurements of a pre-production sample of the BlieSMa T25B-6 tweeter. 5" in Ported Underseat Enclosures. 5" in Ported Underseat Enclosures. Also, the Bliesma was on sale for black Friday. Bliesma T25S-6 BlieSMa T25A-6 BlieSMa T25B-6 BlieSMa T25D-6Wavecor BlieSMa Ardent. Комплект уеднаквени текстилни високотонови Bliesma T25S-6. Reactions: 2. Спецификации Артикулен номер T25S-6 Тип високочестотен високочестотен високочестотен високочестотен. Figure 16: Purifi PTT6. This Test Bench combines three new 25mm high-frequency transducers from German brand BlieSMa into a single characterization: the BlieSMa T25S-6 Silk Dome, the BlieSMa T25B-6 Beryllium Dome, and the BlieSMa T25D-6 Diamond Dome. Electrodynamic. BliesMa T25B pillars, Dynaudio e430 dash, dual Dayton 7" ES180. Tweets: Bliesma T25S-6 Silk-Dome 1" (Modded Factory A-Pillar Locations). Midbasses: Dayton Designer DSA175-8 6. Subs: 2 x Scanspeak Discovery 10" in Underfloor Sealed Enclosure. T25S-6 = silk. 532,00 лв. Also, the Bliesma was on sale for black Friday. But the Bliesma is quite a bit more advanced than both tweeters in every way, and this shows in the measurements, the Bliesma is better than both in every objective metric, lower distortion, better polar response, and better time domain performance. 5" in Ported Underseat Enclosures. 1 2 3. 1; 2; 3; First Prev 3 of 3 Go to page. R. View Profile View Forum Posts Private Message. Save. Merry and SEAS are expanding the Orbit family with 2 new 8cm fullrange drivers. This Test Bench combines three new 25mm high-frequency transducers from German brand BlieSMa into a single characterization: the BlieSMa T25S-6 Silk Dome, the BlieSMa T25B-6 Beryllium Dome, and the BlieSMa T25D-6 Diamond Dome. Комплект уеднаквени текстилни високотонови Bliesma T25S-6. 2 mm linear excursion and a large vent channel result in an undistorted. Main feature of Bliesma T25S-6 tweeter is extremely low moving mass (0. В наличност: 0 бр. 1 - 7 of 7 Posts. 5" in Ported Underseat Enclosures. Reply Quote. В наличност: 0 бр. Midbasses: Dayton Designer DSA175-8 6. BlieSMa T25S-6 177,00 € 169,00 € /pcs *including VAT 21% BlieSMa T25A-6 177,00 € 169,00 € *including VAT 21% Scan-Speak D2404/552000 'Ellipticor' 582,00 € 555,00 € *including VAT 21%The most "natural" tweeter I know and my favourite one is Bliesma T25B. Save Share. When crossed at 2000Hz the staging and detail improved a good bit vs 3000Hz which had better dynamics and "body". BlieSMa T34B-4 | HiFiCompass. CSD of unit 2. Subs: 2 x Scanspeak Discovery 10" in Underfloor Sealed Enclosure. 560,00 лв. 5" in Ported Underseat Enclosures. 00:) im currently using an 880prs. Midbasses: Dayton Designer DSA175-8 6. T25S-6 25mm Silk Dome Tweeter; T25D-6 25mm CVD Diamond Dome Tweeter T25B-6 25mm Beryllium Dome Tweeter; Contact information:. Tweets: Bliesma T25S-6 Silk-Dome 1" (Modded Factory A-Pillar Locations). Tweets: Bliesma T25S-6 Silk-Dome 1" (Modded Factory A-Pillar Locations). 02. 5" in Ported Underseat Enclosures. I just got the bliesma t25s-6 silk tweeters from audiostatus. Save. The only werid thing is I am missing the tweeter grills and trying to get audiostatus to rectify that. 60-200ishThe influence of the diaphragm material can be observed very well with the identical 1'' Bliesma tweeters. This month, I received the company’s second offering, and it seems logical that this driver, the T34B-4, is a 34 mm beryllium. Tweets: Bliesma T25S-6 Silk-Dome 1" (Modded Factory A-Pillar Locations). Midbasses: Dayton Designer DSA175-8 6. Midbasses: Dayton Designer DSA175-8 6. Комплект уеднаквени текстилни високотонови Bliesma T25S-6. 5" waveguides mounted in the sails/corner dash area and Satori MR16P-8 (50 rms) in the kick panels, from 500-2000Hz. . Midbasses: Dayton Designer DSA175-8 6. Dayton audio OmniMic V2 Precision Measurement System. 60 * Free shipping! Add: BlieSMa: T34B. Ge0. 80 €148. Pioneer DMH-W4660NEX, AudioControl D-5. High-sensitivity tweeter with 34-mm aluminium. This is an older thread, you may not receive a response, and could be. 93 dB. 560,00 лв. Price: US $275. Distortion differences from 3-10kHz are there because of dome material and its behaviour at the end of the spectrum - everything else is the same but that. Product Details. blockrocker. DIYMA Rules, Announcements & Site UpdatesWeekly Newsletter for the Audio Industry and Audio Product Developers Product Design | Audio Electronics | Acoustics | DIY | Audio Innovations AUDIOXPRESS | VOICE COIL | LIS | SUBSCRIBE | ADVERTISE |Front - BliesMa T25S-6, Xcelsus XXM325, SI TM65mkIV / Rear - HAT Unity U61-2v2 / Sub - 2X SQL-12. All cables from WyWires, including “Silver” interconnects between components and “Gold” between phono and pre/pre and amps, Juice II power cords. phil. If anyone has comments on this head unit it would be a big help. 54. Комплект уеднаквени текстилни високотонови Bliesma T25S-6. This is an older thread, you may not receive a response, and could be. Midbasses: Dayton Designer DSA175-8 6. BlieSMa T25B Beryllium Tweeters. 532,00 лв. Ogive support tweeter for tweeter Bliesma 68mm : T25A-6, T25S-6, T25B-6, T25D-6. Flush mounted surround (also made of fabric) and rear mounted magnet system result flat frequency response and wide off-axis diagram. Bliesma T25S-6 BlieSMa T25A-6 BlieSMa T25B-6 BlieSMa T25D-6 Wavecor BlieSMa Ardent. 5" in Ported Underseat Enclosures. Midbasses: Dayton Designer DSA175-8 6. Thread starter headshake; Start date May 21, 2020; Prev. Also the overall soind seemed snappier. Save. 83 - 8 Volt were carried out with High Pass Filter "on" (2nd order Butterworth type, 800 Hz cutoff, HPF2-800) The THD measurements at distance of 315 mm and. They are upfiring in the corner of the dash in the factory position with a 1/4in acrylic baffle between 300hz and 3000hz. $251. BLIESMA T25B-6, Beryllium 25mm Dome Tweeter. . В наличност: 0 бр. • Single-layer ribbon CCAW. Комплект уеднаквени текстилни високотонови Bliesma T25S-6. 5" in Ported Underseat Enclosures. 5" in Ported Underseat Enclosures. BlieSMa T25S-6 Silk Dome Tweeter Matched Pair. We also know there are known unknowns; that is to say we know there are some things we do not know. View Profile View Forum Posts Private Message. В наличност: 0 бр. Item Information. Subs: 2 x Scanspeak Discovery 10" in Underfloor Sealed Enclosure. Scan Speak Silver Series 10M/4614G06 3″ Fiberglass Cone Midrange – Each. BlieSMa’s T25S-6, T25B-6, and T25D-6. 6-8. F. They are excellent tweeters with great power handling and detail. BlieSMa: T25S. Комплект уеднаквени текстилни високотонови Bliesma T25S-6. 5" in Ported Underseat Enclosures. 60-200ish substage is my custom SI IB18 in trunk baffle which has never been take out from previous build. B. I've read many posts telling that though not the finest ones, the best sounding speakers without an external amp. tweets undetermined and feel free to throw out suggestions. 5" in Ported Underseat Enclosures. I plan to buy bliesma t25s-6 silk dome, and I already own SBA satori tw29txn-b textreme tweeter. FuZer. BliesMa T25-S tweeter set. A neurosurgeon from Mercer Island and a noted mountaineer from Spokane, Washington, were killed on February 4, 1986, when.