Jump to content

Leaderboard

Popular Content

Showing content with the highest reputation on 05/31/21 in Posts

  1. Thanks to those that served and have passed. My Dad was in Germany as an 18 year old in WW2 . He lived through the war but never recovered from it. If he could only have had a "safe space" and a "cry closet" and that mean ole Adolf would have been "cancelled". Of course he lived in the real world, where you lived or died based on your wits and your fortune, daily.........Thanks Vets !
    7 points
  2. That was an amazing post. I'd hate to be an engineer at a for-profit loudspeaker company. : ) Thanks for the history and questions. I'm going to focus on just one thing in this thread - surveying readily available non-air cored inductors to see if it's possible to approach air-cored electrical performance without their downsides. Much (most?) of the fun of this for me is in the learning. A passing audible grade will be defined as no noticeable difference (to me) between an active low-pass and passive system with the same electrical transfer functions. This is probably achievable because I'm dealing with low frequencies where we have much less ability to hear distortion. I'm also standing or sitting and often falling off the shoulders of those who've gone before me with the measurement vs. audibility stuff. Heyser was all about that and in my feeble attempts, so am I. God bless you and your precious family - Langston I happen to believe that a major purpose of technical audio measurements is to assist in creating better subjective perception, and if that's not happening, then we are getting nowhere with the objective measurement - Richard C. Heyser
    3 points
  3. & leave it the dj to find a vinyl edition Oreo!
    3 points
  4. Don't worry As soon as you have some extra money your hand will start shaking when the mouse rolls over speakers or gear you want on the internet Frequently the shakes will make you start clicking Yes ! yes! yes ! Enjoy your new speakers .....
    3 points
  5. Well, I did the deed and now they sound great! Approximately $300 for speakers and one replacement tweeter. I think I’m done searching for any other bookshelf speakers. Sent from my iPhone using Tapatalk
    3 points
  6. ..............here, the vinyl with matching themed center label, nice !
    3 points
  7. ....and, in the gatefold....lyrics and stats can be found
    3 points
  8. ........the very nice rear cover artwork........and yes, my adult beverage and vintner of choice this evening 🍷
    3 points
  9. Onto another great recording, great musicianship. Thanking our friend Dirt Mudd for sending this great 180 gram recording along to me for the collection Front cover art
    3 points
  10. Thank you Islander, your advice is greatly appreciated.
    3 points
  11. Good evening, good morning everyone. Sunday evening here in Longfellow Music Hall, and that means Sunday's are for vinyl ' Starting off with a glassic Windham Hill recording. Shadowfax, here is the front cover artwork.
    3 points
  12. Just finished this interesting documentary on Belgian national television. I love how they go through the heap of vinyl records on the coffee table. You can't do that with digital files, now can you!
    3 points
  13. I've never written a review on any forum but the KLF 20's prompted me to do so. I've settled in on a McIntosh 2100 solid state amp and Conrad Johnson PV2 pre to run my Klipsch speakers in my listening room so that's the electronics I'm reviewing the KLF's with. Previous speakers were Klipsch Forte 2's with Bob Crites rebuilt crossovers and titanium tweeters. This combination was very nice and enjoyable but a pair of the KLF's came up for sale and I've always wanted to try them. As far as I know the KLF's are not upgraded in any way. I've been listening to a variety of material the last few days and the Forte's have been moved to a different location in the house where they may stay for awhile. They're too good to let go of. But the Legend series KLF's have a bass slam (and what seems to me to be a more accurate sounding bass) over the Forte's that they're a real joy to listen to. They don't seem to give up much in the mids to the Forte's which may have a little better sound stage and presence in the mids. Highs seem about equal, but the KLF's are taller and the mids and highs seem to integrate better over the span to my listening area. Maybe it's just the positioning. These speakers are not just rock and roll monsters but seem capable of delicate nuances in jazz and classical music also. IMHO they're not just home theater speakers either which is what a lot of folks use them for. They sure do that job well but they're also a very, very capable 2 channel transducer. I'm enjoying the heck out of these right now.....next stop might be Cornscalas but for now these will do nicely. If anyone's been on the fence about trying the Legend series I can't recommend them highly enough.
    2 points
  14. Hello: My first post here. Incredibly impressive forum on two counts - some genuinely serious audio (Chris A. and others) and secondly, rare for today, allowing some difficult conversations without censorship. I spent a few decades in pro audio (concert production) with the intent on bringing the best sound in the world to my audiences. Of course I rarely pulled it off, but I enjoyed the pursuit. : ) Much of the endeavor involved modifying the weakest link in the chain: loudspeakers. My hero in the realm is Dick Heyser and he did a review on the mighty Klipschorn in a 1986 Audio Magazine article and ever since then I wanted to purchase a pair and have a go at making them all they could be without violating PWK's vision. Now I'm retired and have the time to make a mess of home audio, so I found a very nice pair of 1974 vintage Klipschorns, Polk SDA SRS 1.2TL's, Martin Logan CLS II's and some other stuff. I'm into inverse filtering per Dave Gunness's work and I'm also a huge Tom Danley fan though and may end in his court, we'll see. --- What's my first post about? My stubbornness to stay with passive crossovers per the original Klipschorn design and thus have to deal with something I avoided with professional loudspeakers: cored inductors. Something this "simple" ended up taking much of a month to figure out and I'd like to share my findings. Sure, air core is the way to go as long as you keep them away from ferrous materials and magnetic fields. That's not so hard with the smaller values required for mids and highs, but at low frequencies, reasonable DCR is a challenge. I thought it would be easy getting a high quality 4mH cored inductor with less than 0.5Ω DCR for the Crites cast frame woofer (replaced the square magnet K-33P), but even some of the best of these generate too much distortion for my taste. --- What do I mean by distortion? To begin with, THD is a poor, but not quite useless distortion measurement for devices that exhibit natural low-pass characteristics; such as inductors and horn loaded bass cabinets. THD is all about comparing the unwanted odd and even harmonics to a fundamental, and the harmonics are largely filtered out! Thus you can get good THD numbers and still have audibly unacceptable levels of distortion with low pass devices. The solution is to measure distortion components within the passband of the device, and that can be done with intermodulation techniques that use two or more simultaneously generated tones within the passband to generate sum and difference frequencies as well as harmonics of the (two or more) fundamentals. I chose Audio Precision's "MOD" IMD measurement technique as well as a high resolution, low frequency Multitone stimulus to compare 4mH inductors loaded by a 4Ω power resistor. 4Ω is what the Klipschorn and a great majority of low frequency systems use, thus 8Ω wattage specifications tend to be marketing ploys IMO. Inductors are current limited animals, not wattage limited. An inductor that is clean at 10 amps into 4Ω behaves identically at 10 amps into 8Ω. Ohm's law states that Amps(squared) times resistance equals watts, thus the 8Ω load will provide the marketing department with twice the wattage specification compared to the more realistic 4Ω. --- It has been a personal endeavor to select a low DCR woofer inductor for my 2nd order (electrical) low pass filter. There is a 12awg copper foil air core inductor that boasts a 0.3Ω-ish DCR, but I wanted to learn about cored inductors, thus purchased the following 4mH coils (that's what their nominal spec's were, but the truth turned out to be 3.4mH - 4.2mH). 1. ERSE SuperQ 16awg 2. ERSE SuperQ 14awg 3. ERSE IQ 18awg 4. Jantzen C-coil 14awg 5. Madisound Sledgehammer 15awg 6. Crites Steel Core 0.46Ω DCR (don't know the awg yet, either 18 or 20) I won't have inductor #5 until 2 June. Would the results of my testing be of interest? God bless you and your precious families - Langston
    2 points
  15. Selling my DG-SE1 EL84 pure Class A, Single Ended amp It started life as a Magnavox Design. They have a huge thread over on AK about the Mods and results. This particular amp was scratch built has all new X-Formers etc... Uses a pair of EL84 (RCA Included that measure 90+ on my Tester) it uses the 12A-7 Variant driver tubes, I will include a vintage 12ax7 which offers the most gain (I personally preferred a 12au7) I am also including a Dumont 5ar4 rectifier. There is a schematic of the design attached to the bottom plate inside the amp. I am Selling the ugly duckling for 350.00, Plus shipping. On this amp. I will only accept Friends and Family because of the DIY nature and appearance of the amp, I do guarantee it will not be DOA beyond that its AS IS. I have no reason to believe this amp will not last for years I have played it several times for 4-5 hours straight without any issues. It holds Bias well Bias is to be set at 5.6 VDC up to a max of 5.85 VDC The Bias being lower or higher can theoretically change the sound, I personally like to stress my tubes less and set all my amps on the low side of Bias.......................You will need a multi meter that measures DC, there are test ports on top of the amp along with Pots to adjust the Bias The amp is 100% functional, and IMHO you will have to spend a considerable amount more to get better SQ.......................I have no use for 4 different EL84 amps, My other amps do not necessarily sound better they did however cost 3X as much Link to the thread discussing the amp's https://www.audiokarma.org/forums/index.php?threads/magnavox-flea-power-getting-more-out-of-the-8600-series-a-lot-more.665735/
    2 points
  16. Do you know the warm progress under the stars? Do you know we exist? Have you forgotten the keys to the kingdom? Have you been born yet, and are you alive? Let's reinvent the gods, all the myths of the ages Celebrate symbols from deep elder forests Have you forgotten the lessons of the ancient war? We need great golden copulations. The fathers are cackling in trees of the forest Our mother is dead in the sea Do you know we are being lead to slaughters by placid admirals and that fat slow generals are getting obscene on young blood? Do you know we are ruled by T.V.? The moon is a dry blood beast Guerrilla bands are rolling numbers in the next block of green vine amassing for warfare on innocent herdsman who are just dying O great creator of being, grant us one more hour to perform our art and perfect our lives The moths & atheists are doubly divine and dying We live, we die and death not ends it. Journey we more into the Nightmare Cling to life our passioned flower Cling to C..ts & c..ks of despair We got our final vision by clap Columbus's groin got filled with green death I touched her thigh and death smiled. We have assembled inside this ancient insane theatre To propagate our lust for life flee the swarming wisdom of the streets The barns are stormed The windows kept And only one of all the rest will dance & save us With the divine mockery of words. Music inflames temperament. When the true King's murderers are allowed to roam free a 1000 Magicians arise in the land Where are the feasts we are promised? Where is the wine, The new wine, dying on the vine?
    2 points
  17. Thats what she said 🤣 AMP IS SOLD Pending funds
    2 points
  18. Thanks for the nice words but there was one thing you got wrong. Laurie is a girl who smokes a lot of Marlboros [emoji2372] Anyway, it’s hard enough to deal with the loss of my brother but trying to deal with the estate as well is tough. So once again thank you for your kind words it is truly appreciated [emoji3590] Sent from my iPhone using Tapatalk
    2 points
  19. We had our first Heathkit color TV ~1964. In 1965 we moved to Kalamazoo and built our second Heathkit color TV (the first one was sold with the house). In addition to color TV we had Fetzer Cable, which allowed us to watch stations from Detroit, South Bend, and Chicago. We probably got a dozen channels. Without cable you could get CBS and NBC pretty well, but ABC not so great. Happy Memorial Day. Remember those men and women who gave all in service to our country.
    2 points
  20. A great Marillion album
    2 points
  21. You would be surprised how much the output changes by not using the same value and spec capacitor. This applies mostly to caps in series with the driver. On the woofer section, if the cap is in parallel, then is should be ok to keep it electrolytic. Using a different type of cap here is not so critical because it is in parallel with the driver.
    2 points
  22. Well my fellow vinyl lovers, this will be it for this evening. Side TWO with a variation on the center label, and about to move the cue lever 🍷 Goodnight for now until the next visit, enjoy your music ...
    2 points
  23. Of course, it would be an evening in the 'Hall' without sharing a current spinning vinyl 'vibe' photo
    2 points
  24. ......all cued up and ready, but currently now listening and enjoying a very fine pressing of this recording
    2 points
  25. ............just before giving this recording a listen, a photo on the 960 .....cheers 🍷 This is sounding VERY nice with it's brand new stylus, wish you could all join me
    2 points
  26. I've chosen (3) measurements for inductors: 1. THD up to 0.5% from 10Hz to 20kHz. 2. IMD up to 0.5% using equal levels at 50Hz and 500Hz. 3. Multitone from 10Hz to 20kHz with 48,000 sample points (crazy high res). I'm using a Powersoft K20 amp through the coil under test, then into a 4Ω power resistor rated at 100W. I'm using 2 second THD sweeps that avoid heating the resistor too much even at 110V (3,000W), which is way more than any cored inductor can tolerate that I've come across. The amp is very comfortable at this level, thus doesn't pollute the results with distortion products of its own. THD Not the right tool for analysis due to the low pass characteristic of inductors. I found it useful to ballpark maximum current an inductor can handle prior to severe saturation. 0.5% THD fits the bill although it understates the actual distortion going on within an inductor's limited passband. IMD This has been the go-to for many years. Audio didn't use to have the bandwidth it has today and IMD was the primary way to assess distortion in limited bandwidth devices - it was also one of PWK's favorites. Stimulating the device with multiple tones is also more like what devices are exposed to in use and the harmonics that fall out of these tests have no harmonic relationship to music, thus sound terrible, thus is something you want to avoid, thus test for. IMD measurements can scream bloody murder when THD looks fine. Keeping IMD under 0.5% through the maximum current the inductor will see in use is the bottom line for me. This is what ERSE, Jantzen and others should be doing when they rate their inductors' maximums. I found several inductors that can't go under even 1% at ANY drive level. Multitone This is cool, but nobody really knows how to objectively correlate it among differing devices to how the devices will sound. Nevertheless, it is very telling to look at a bunch of simultaneously generated tones located in specific areas (it's complicated) and seeing the crap that fills the gaps between these tones. I think this is the future of objective distortion measurement once we figure it out. Sorry for all the words. : ) Next post will compare (3) 4mH steel plate cores (you'll be surprised): 1. ERSE IQ 18awg 2. ERSE SuperQ 16awg 3. ESRE SuperQ 14awg PS: You've heard this, but it's true - air cores are effectively perfect, you just have to deal with magnetic sensitivity, DCR, size and cost. God bless you and your precious family - Langston An experiment is a question which science poses to Nature, and a measurement is the recording of Nature’s answer - Max Planck
    2 points
  27. I would get the La Scala centre speaker, get it integrated into your system, and then listen, for weeks or more, and then decide if you find any timbre mismatches severe enough to make replacing some of your other speakers necessary or beneficial. Rather than relying on theoretical considerations, let your own ears decide.
    2 points
  28. forgot which aerosmith quad I had searching for rocks quad !
    1 point
  29. And given all of that, the question remains---Habs, or Leafs?
    1 point
  30. The rare Salvador Dali edition of the La Scala.
    1 point
  31. And to those that toil with the scars of conflict also.
    1 point
  32. Congrats they are fine speakers for sure!
    1 point
  33. For a start auto transformer increases impedance seen by C2. And not sure raw impedance's you have chosen are correct. For ex. K33 is 4 Ohm impedance speaker. Horn loaded it will be higher but it's not the case as it's Cornwall so judging by measurement around 400Hz it's closer to 5 or 6 Ohms. For other it will be similar + additionaly autotransformer impact. K77 impedance looks closer to 7.5. And then other factors needs to be taken into consideration as actual frequency response and more. Calculator you have used is good only for ideal drivers with flat response and same efficiency.
    1 point
  34. Two rescued dogs with us.
    1 point
  35. This is an recent photo of my buddy Leo that listens to music with me He is a 12yo Irish Terrier
    1 point
  36. I will be checking it out. Thanks!
    1 point
  37. Not being critical here, it is what it is. The JEM kits and Crites kits are in the same ballpark - and he did say he didn’t want to spend that much. The 7uF and 68uF are electrolytic capacitors. Are you staying with electrolytics in those two spots?
    1 point
  38. Holy cow! Just imagine the THD and IMD of a voice coil!!
    1 point
  39. Congrats on freedom to use retirement time and money for what it's for! Please share as you see fit
    1 point
  40. Bennic or Dayton Audio if you want to keep costs down.
    1 point
  41. I actually studied computer programming in HS and Jr college.... Our "programs" were on that tape...had a teletype machine to connect to the computer... We went to the U of AZ Computer Science building [in HS] to visit the computer. We took programs with us.... on key punch cards. Try keeping those in order....Felt like we needed a wheelbarrow to haul the program. I learned to hate computers.... it took really well, too. I still intensely dislike them. Mostly the over application of them. Yeah... they save us a lot of running... so we can go to the gym and get the exercise we missed. I'll cut my rant short... ------------------------ Was up at 4AM. Did a quick clean on the floors and ran the vac... we had the kid last night. She and the wife sleep at the cottage when she's here. That's how I was able to get things done....The dogs appreciate the company and the kid has a habit of planting her feet in your back when she sleeps. King size bed over there.
    1 point
  42. We made the drive up to the top of Mauna Kea for the sunset. Around 13,800 ft elevation. Maui is on the right horizon in the photo above and below stars just becoming visible
    1 point
  43. First pot full of backyard goodness: orange, red, purple, and yellow tomatoes, a small hot and one large sweet Chile, 1\4 garlic clove, medium onion. Oregano, prickly pear balsamic reduction, extra virgin olive irl. Dice all solids, apply heat. Wait 4-6 hrs, chow down. swerved from my intent to make sauce. Cooked a pound of mixed beans in a pressure cooker. Browned two pounds of sweet Italian sausage. Threw it all together, simmered, and will call it paella. Changed my mind: will call it delicious. Me Gusta......
    1 point
  44. $$ C'mon we know you're kidding, it makes sense to get more for less per piece! Waiting for a deal on a set of Snap-Ons. Or backup for a highly recognizable rationalization
    1 point
  45. Not good, hope he's getting all he needs. He's been such a good player for so long...
    1 point
  46. That is SCARY! We've got a nuclear power station thirty miles north of here at the river north of town. Why can't the govt follow it's d*mn job description? & some great guests with him too @dtel * Just saw that pic of your etouffee on the last page, looks like it is roux based. Haven't done that is so long I'd have to use "the book" for making it right!
    1 point
  47. Yessir! Used to watch Justin Wilsons' show, he even made a Turducken one time! Mentioned the trinity often. Outer Banks used to be one of the highlights. You could walk almost a half mile it seemed to get to the waves from the lighthouse before they moved it in from the washed away sand. * Do you know how hard it was to type Justin's last name? Twice I put Williams in there(Mr. Game 7), and I'm on my second cup already☕
    1 point
  48. I’m changing mine to Dave’s tweeters, I may sell my H1’s tweeters Pm me and let’s see what kind of deal we can make Sent from my iPhone using Tapatalk
    1 point
×
×
  • Create New...