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sixsigma

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About sixsigma

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  1. La Scala driven with a tube amp? That is exactly what I setup. I had a similar question as yours after hearing a friends La Scalas and decided they were the right choice for my 2 channel setup. I got lucky and found a really nice set within driving range. Here is my setup, and and I can say I am continually blown away by how good this sounds. The imaging, stage, depth is incredible. I added a powered Polk 12" sub (seen in the right corner of the pic) that use speaker level inputs (in parallel with the LS). Crossover is around 70hz, so it is only adding the very lowest bass. I have the gain on the sub at 100%, and it does generally make an improvement but isn't what I'd say is required. My 2-channel room is far from ideal - rectangular with lots of flat surfaces for reflection, including a bar on one side of the room. My HT setup is in a different room with in-wall speakers so I could not place the LS in there. I vote for the La Scalas in your situation! I have them both toed in a bit, the right speaker is toed in more than the picture shows. The left speaker is in a corner which helps with the bass response. 1977 La Scalas with recapped crossovers Yaqin MS-30L amp, using EL-34Bs Audio-Technica LP120 turntable (using internal RIAA equalized phono stage) A cheap Sony DVD/CD player Aux input for streaming audio
  2. So I decided to deploy a sub with my La Scalas. I went with the Polk PSW505 which is a powered 12-inch sub, great reviews and relatively inexpensive. I am going to be using the speaker/line level inputs as my Yaqin amp doesn't have a pre or sub out. According to https://www.upscaleaudio.com/pages/subwoofer-tips this is not a bad way to go. I do not intend to connect the LS to the speaker-out on the sub, which means I will continue to have full range going to the LS. The sub has a variable crossover point, from 60-120hz. What would you recommend as the sub xo point, given that the LS will continue to receive the full range signal. I've read the LS drop off completely at ~50hz and are weak below 90hz, so I'm thinking 90hz is a good point. I'll experiment but wondered what the community thinks best given your experience and this specific config.
  3. I've been doing a little non-scientific experimentation to see if I can find a media format that consistently sounds better to me. I am an admitted vinyl fan and collector, and I prefer vinyl for some recordings, usually pre 90s stuff. I think your point is good that it's the people and processes that really determine how it sounds, more than the format. For example, I have a treasured near-mint, not played much, original 1969 pressing of Led Zeppelin II that will damn near bring me to tears it sounds so good. I also have a copy of the new vinyl reissue, which is remastered by Jimmy Page himself (although I wonder what role he really had in it). The reissue sounds like crap. Flat, no range, just dull. So the vinyl format itself is not the golden key. I also have a Mobile Fidelity Sound Lab (MFSL) copy of Led Zeppelin II that was pressed in 1982 (if I recall correctly). MFSL claims to use the original master tapes played at half speed to create the analog vinyl master cut, and the highest quality vinyl material. The MFSL copy sounds good - I'd say as good as the original 1969 pressing with any differences chalked up to condition of the vinyl. I'm curious why the reissue vinyl sounds worse. Is it the remastering? Did they use the CD master as a source? Is it the new vinyl pressing equipment? What did they change in remastering? Why didn't they use the original master tapes as they were? Are the original master tapes still good or have they degraded? Another example is Dire Straits Brothers in Arms album. I have it on original vinyl and CD. The CD sounds as good as the vinyl, maybe even better because it is clean and there is enough clear open sound in many of those songs where clean clear silence makes a difference. Also, that album came out in 1985. It was one of the first all digital albums (DDD) and was intended to be issued on CD, along with vinyl. But that was before the CD loudness wars and I can only assume the mastering wasn't customized for CD. The CD sounds as good or better than the vinyl to me. So again, it isn't the format that makes or breaks the sound. I think for new music I prefer a high-res digital audio source, with a few exceptions. But if I wanted to showcase the best sound from my 2-channel setup, I'd go to some vintage, good condition vinyl.
  4. new 2 channel setup

    I ordered the amp on Amazon, with Prime shipping. Since it weighs ~55lbs the free Prime shipping was a nice benefit. The turntable I got on sale at my local Best Buy who had it for less than anyone online. I got the LaScalas off Ebay from a semi-local seller, so I could pick them up myself.
  5. new 2 channel setup

    Thanks! The MS-30L has a remote control (motorized volume control), automatic delayed start tube protection circuit, selectable Ultralinear and Tripole modes, EL-34B power tubes, and higher quality transformers. It is about $100 more than the 13s which I thought was worth it for the upgrades. I wasn't sure exactly what to expect from a Chinese brand, but am actually really impressed. The remote control is a single machined block of aluminum. The amp itself is made from high quality materials and is very heavy (>50 lbs). It sounds incredible, lots of depth and punch, and it drives the LaScalas cleanly into painful territory. The amp gets very hot though. I could prob heat the room it is in! Here's a pic with the cage removed.
  6. new 2 channel setup

    The bias on a tube regulates the idle current. The bias setting can vary by tube model and even within a batch of same model tubes. There are a few ways it can be done in circuit design, and most of that is over my head. On this Yagin, it uses an adjustable fixed bias, where each tube has +/- multimeter contacts and a bias pot to adjust. Only took a few seconds to complete.
  7. new 2 channel setup

    Here's a better pic of the amp. I set the bias on each of the EL34s to .45 volts, as indicated in the manual. Yaqin included a handy little Torx type driver for the bias adjustments.
  8. new 2 channel setup

    I'm working on my new to me 2-channel system. I set out to build a good sounding 2-channel system without falling into the expensive black hole of high end audio equipment. I wanted to keep this all-in under $2500. I started with a really good set of 1977 La Scalas that I had Bob Crites rebuild the crossovers (great job and highly recommended). For the amp I chose the Yaqin MS-30L with EL34B tubes. The Yaqin has surprisingly good build quality and weighs over 50 pounds. The power transformers are Japanese with claimed 'audio grade' materials. I chose the MS-30L model because it has a few higher quality components, has a remote control, tube protection circuit, and offers user-selectable Ultralinear or Triode modes. Ultralinear mode provides 50 watts power and Triode mode offers 25 watts. The turntable is Audio-Technica LP120. I'm using the supplied cartridge and built-in SS phono stage (RIAA standard). Not an expensive turntable but very good quality and has a lot of high end features. I really like it for the money. The sound is overall amazing. It sounds very broad and wide, lots of dynamic range. I was worried that the bass may be weak with the La Scalas but that is not the case. It seems to have a very solid low end. Maybe not vibrate the walls deep but I don't hear that I'm missing much in most of the music I listen to (rock, primarily). I find myself wanting to keep turning it up, which is a sign that it sounds good. I thought I might like the Triode mode better as it drives the tubes a little harder, but I think I like Ultralinear mode a little better as it seems to have slightly more punch and depth. The difference is subtle though, and I think depends on the specific track. I like that I can switch between modes to experiment. The LS are very directional though and I am still trying different speaker angles and sitting positions for best sound. I'll update more later as I get some more experience with the Yaqin and system. I'll add a CD player later and I have a feed from streaming digital audio as well.
  9. transporting La Scala

    They are 10Rxxx serial numbers, which means 1977 right? The serial numbers on the paper tags match what is stamped in the top edge of the back panel. They appear to be completely intact and original, but I suppose it is possible the trim was been modified. They are missing the Klipsch labels on the front, and wow I'm surprised how much replacements cost!
  10. transporting La Scala

    Got the LS home safely with no issues using a Suburban. They fit nicely on their sides and were protected with blankets all around. I don't have them hooked up yet. I cleaned them up with some OrangeGlo furniture polish and the birch lacquer really shines. They are in really good shape. I may go ahead and replace the caps on the crossovers as I'm assuming they are not in spec after 40+ years.
  11. transporting La Scala

    Thanks all for the advice. The LS are relatively short and squat, so I may try standing them vertically and wrap them with blankets so there is no contact with each other or anything else. If I do lay them down, it sounds like laying on their back might be best. I'll use tie downs (over blankets and insulation) to secure them regardless of how they are positioned. This is only a 3 hour drive. Weather forecast is clear, so i should be good to go. I'm excited to get these home safe and sound. I've looked for a decent set of LS within driving range for a little while now, and finally found a pair. I believe I paid a little too much for them, but they are in great shape and are relatively close by, which is worth something. These are from the 70s and have original AA crossovers so I'll probably need to replace the caps. Hopefully that's all they need for rehab!
  12. transporting La Scala

    Hello, I am picking up a pair of vintage La Scala this week and am wondering the best way to transport them. I'll be using a pickup truck and I am thinking of placing them face down on a large blanket. I'd cover the backsides with a tarp. Any issues with them being face down? Would face up be better? I could carry them vertically although I worry about stabilizing them well enough so they wouldn't fall over if I had to brake hard or swerve. Lots of good information in this community. I hope to contribute after I learn more about the LS. Thanks for the help!
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