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View Classified FOR SALE: KR Audio 300B tubes, Riccardo Kron Anniversary edition, MATCHED QUAD I have a virtually new matched quad of the famous KR Audio 300B DHT tubes, but these are the special Riccardo Kron Anniversary edition to commemorate the original founder Riccardo Kron. These tubes are definitely top notch construction. I am the first owner and were arrived in mid September 2023 as part of my Lampizator DAC, and I have used this quad for less than 20 hours and put them back in the box. With the import tax, they cost around $1200 US dollars a pair / $2400 for matched quad. Asking $950 per pair shipped or $1850 for matched quad. Prefer to keep this quad together but will consider selling as separate pairs. Here’s the specs from their website. KR AUDIO 300B RICCARDO KRON LIMITED SERIES Use of Zirconium - as the coating for the anodes Improved structure support in the least vibrating glass points with double mica Ceramic bases Gold plated base pins Triple thickness glass Doubled cooling radiation surface for anode cooling Barium heaters that run colder and have better emission Closer tolerance matching 9th degree of vacuum for extended longevity Precise matching of the real original 300B specs and layout. KR Audio warranty on their tubes: https://www.kraudiousa.com/pdfs/13___KR_AUDIO_VACUUM_TUBE_WARRANTY.pdf Seller keithc Date 12/06/23 Price 950.00 USD Category Accessories  

If you are considering have a set of Quad ESL (57's, 63's, etc.) refurbished, please be aware of some unsavory business practices by one of the leading firms, Quad Unlimited and its owner Wayne Piquet (aka PK). If you do research on the various companies refurbishing Quad's, PK has a sterling reputation. His work even received a TAS "Golden Ear" award in 2007. And, one of the main Quad ESL information websites have a webpage dedicated to PK's services. Well, I have personal experience with PK. Back in late 2011, I contracted him to refurbish a pair of Quad 63's. After months of delay in delivering my speakers and at $500 additional cost over our initial agreement, the speakers were basically worthless. They almost immediately started having issues with arching. Eight months after receiving my speakers I ended up selling them for $250 (my total costs were well over $3000). I tried to have my money refunded but PK absolutely refused. Given that I reside in Colorado and PK resides in Florida, taking legal action, which I seriously considered, was not in the cards. Besides, it was my word against a well known & respected industry expert. For the most part, I had moved on until a recent development this week where I was able to learn that several other of PK's customers have had similar experiences (and worse). This all came about when PK did an e-mail blast to a large group of people to solicit the sale of a special pair of Quad's he had. He included everyone's e-mail address (vs doing a BCC). I did a "Reply All" to request removal from the list because of my previous experience with PK. I also included a very brief paragraph of my issue with PK. As a result, 2 other people came forward (via public e-mails) and related similar experiences. All of us lost $1000's so this is not trivial. As I mentioned earlier, I know that people including some on CA had been very happy with PK's work but there is another side. If you want more information such as copies of the other complaints (e-mails), please PM me.

I have now been enjoying music in glorious surround for almost a year. I urge everybody to share good surround experiences, whether the source is SACD, DVD/BluRay, ripped or from disk or any other source. State source, way of playback and number of channels. Let me begin with my surround album from last night: Emil Richards - Joe Porcaro Allstar Big Band - Odd Men In 24/96 5.1 download from AIX Records - DVD Premium - The Emil Richards/Joe Porcaro All Star Big Band - Odd Men In Played with Decibel from internal HD on system listed below. Almost overwhelming big band experience, thanks Aix PS. This thread is inspired by Chris' thread Album of the Evening. I hope we surround connoisseurs can give the CA community a similar list of great surround experiences.