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justinsweber

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Everything posted by justinsweber

  1. Sunvalley pre is a marantz 7 circuit. Can get made brand new for under $1200
  2. The Elect pre is amazing. It includes a phono stage and responds well to rolling. Ive built 2 of them previously and would happily own again. The phono is Opp amp based but is great sounding for MM. You can roll in your own App amps for subtle changes. Re, my ad for the Sunvalley Thats a great pre as well. You can special request one from https://www.vkmusic.ca. Sunvalley is a division of Toyota Corp... its about as old school Japanese as you can get.Line stage tube pre with tube power supply. The PS is on a PCB, the rest is point to point. Its uses the orig Marantz circuit. All good choices. 2 other choices are the ground grid which are amazing and idiot prof to build. Lastly the Akido circuits/PCBs are reference level choices. All ideas Ive suggestedI used/built and consider them incredibly good pre amps.,
  3. Kristo Seems the wisest thing to do be to use a switcher or get a 2nd amp. I think you will lose sound quality and push your amp a great deal harder configuring it to run both sets of speakers at the same time.
  4. You might consider opening up the back and show us what drivers youre using. Crites crossover is great but is intended for stockish drivers, if we see the drivers we can check their efficiency. An adjustable crossover may help you dial in your room even further. Lovely speakers!
  5. SunValley SV-Pre1616D Tube Preamp Line Stage. Condition is New; built but never used. Was enchanted by the idea the Marantz 7 circuit done right. Kit was $700 without upgrades. Fantastic kit, Swapped the stock pot for an Alps Blue Velvet, all wiring was done with Silver plated copper with teflon. Solder is Cardis silver. Based on Marantz 7 circuit. Can be used with 3 AXU7s or any combination of 12AX7 or AU7 tubes. Tube rectifier, GZ34/5AR4. Comes with full tube set, Pre tubes are NOS, rectifier is new. Its a really fantastic pre. I rub all XLR and as such it hangs out in my cabinet unused. https://wallofsound.ca/misc/diy/coming-soon-sun-valley-sv-pre1616d-tube-preamp-kit/ Shipped with FedEx Ground or FedEx Home Delivery.
  6. The kappalite 3015lf4 is a 12” woofer. If doing a cornscala you need 15”. So, Buy a 15” from bob crites. He has 2 very good choices or get a eminence Kappa 15C from parts express.
  7. Are you discussing a cornscala or super heresy. The 15c is a suggestion for a cornscala. I believe the original post is about building a cornscala. He was showing his previous efforts with the super Heresy.
  8. The universals are 6db filters and don’t have same issue. I’d want a specific woofer then the cornscalawal but I’d want higher older filters... need to be kliapxh compatible with k33 or 15C
  9. If I can make 2 suggestions. ALK ES and AP12 networks expect to see a predicted inductance of the voice coil. Meaning that it’s set for a K33/K43 woofer. The Kappa 15C has been measured by Al and is also compatible. If you use something different the crossover could not be expected to perform as predicted. Maybe it wouldn’t matter. Al and only a handful of other people can do the level of calculations needed. In short, use a k33 or kappa 15C or ask Al. Secondly, the DE85 is lovely, is perfect especially for this application. That said. The DE750 was a monster. Bass was much improved. It’s the same diaphragm but 2x the magnet.
  10. They really sound fantastic. Less bass then the cornscala imaging and tonal balance is incredible. Think Dynaco A25/Devore O93. At this point Id say the cornscalaa and the AN15 are my 2best speakers. Big but not huge and incredibly impressive.
  11. Yes it was worth it. Special thanks to Dave Harris for the design and baffles. My cornscala is a truer to source output but these sound like music. I would easily place them on par with my cornscalas. Though I built both and didn’t skimp at all. I would say the cornscala is still more stoutly made. If You ever get a chance to hear the 15 take it upon yourself. I’ve had the 8 inch and heard the 10, but neither compare to the scale and detail and ease the 15 provides.
  12. Thats sooooo stupid... The LED should turn on when charging. It has charged... but I didnt know I could turn off and still charge... thanks for the information, super helpful. I took your advise and just reversed them.
  13. I have my done... Sounds good. Only curious aspect is that you have to have it "On" for it to charge.
  14. I’m not the same Justin. That said, been building SET amps and modifying Klipisch speakers for 20 years. Given that I’m 40, means I’ve been at it for a tinny but of time ;-). On all the forums I’ve always used my full name or company name. I don’t like aviators which sometimes hide identity. If you guys want some more shots of the Cit V let me know. It’s interesting. I’m getting 32watts rms with the 7581a and tube rectification but it’s very very wide bandwidth. I think the bandwidth makes amp sound much more powerful.
  15. Ive used Pi3s with Roppiee for a roon bridge. You can add a DAC hat if you dont have a dac already. With Roopie XL you can also use as Airplay end point. Trying the Pi4 ive had compatibility issues with my DAC. I might just add a HAT to fix and bypass the DAC.
  16. The magic of the HK designs are that the transformers are relatively common. HK, complicated circuits... basic iron... UL for Cit II and Non UL for Cit 5. Macintosh... simple circuits, complex transformers. Its very difficult to duplicate Mac Iron... HK outputs can me made for any number of great suppliers.
  17. The last step it to make our own customer transformer covers. Ill try to laser etch the bias instructions... I figure Ill never have to search out the instructions that way.
  18. So Ive been working on a project for a hair over a year... Its kinda my moonshot. Its a Cit V Mono. It was an effort to make the Cit monos repeatable. My Cit IIs are incredible but the metal work is far too time consuming... to make it work the metal work had to be CNCd. The hardest part of the project was the metal work. We worked on paper first, then an Al chassis... which we have spare and then linked up with a sheet metal fab shop. 12Gage SS is a total pain to work with but the end results are incredible. 12gage, with 2 12gage mid braces, all seems are welded and ground flush... surfaces are jitterbugged. All labels are laser etched. The Chassis with its bottom plate and 2 mid braces was ~ 30lbs before any parts were installed. Rather than rehabbing a Cit V, I wanted to build anew... new connectors, new turret boards and enough room to make serving for the next 50 years a breeze. We like went a bit over spec on the transformers... 200% or so on the power... 8A on the filaments... think I can lightup anything and tube Rect. Our measured performance was 4hz to 110khz -3db @ 1watt and 10hz to 100khz -3db @ 10watts. 32watts RMS... Not the power monster my Cit II is with KT120s but digs sooo deep with a flat fr. Here are some of the pics...
  19. If I may provide some thoughts. The 510 is awesome you may need to remove all dampening, 2ndly. Bob has sold a cs500 that had HF ep for 2way setups. I had a m2380 and hf200 with his crossover. May just need to ask about it. with that said, the 510 makes much much much more sense in 3 way. If you had a K77 or any horn loaded/compression driver tweeter and a ALK cornscalawal. You get the Large mid range sound stage and be able to adjust the presence of the tweeter. You’ll be able to adjust the crossover to your preferences. You can get a good copression driver for $25-$50 each and there are a wide range of horns. Happy to show you ones that you can make fit. So... If want 2way, ask bob for crossover with eq. if want 3 way. Get tweeter and cornscalawal crossover. Lastly, feel free to call me and talk it over further. 949-636-9076 PST
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