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Positive Feedback Feature Review Sneak Peek: The Duelund-Corona 832A Project - Serendipity to Ecstasy!


As is my custom, I like to give you a "sneak peek" into my upcoming Positive Feedback feature articles, which in this case is "The Duelund-Corona 832A Project - Serendipity to Ecstasy!" article describing the Duelund CAST crossover build that Frederik Carøe and I collaborated on for the vintage Altec Corona 832A loudspeakers from the... Read More »


Today's Fresh Catch: Vintage Luxman AS-10 Transformer-Based Constant Impedance Attenuators for the Duelund-Corona 832A Project! Update!


"Today's Fresh Catch" is a bit of a misnomer when it comes to the Luxman AS-10 transformer-based constant impedance attenuators, as these are vintage audio products from the 1970s that were available primarily in the Japanese audio marketplace, and are not in production any more.   Above: Luxman AS-10 transformer-based constant impedance attenuators. You might... Read More »


The Duelund-Corona 832A Project: bedding-in revelations!


I'm in the bedding-in stage for the Duelund-Corona 832A Project. I'm only about 15 hours in of the 100 hours or so needed for bedding-in of the breadboard phase of the crossovers, but the overall sound quality, tonality, and level of emotional engagement is already really shaping up impressively. There's a couple of things about... Read More »


Jeff Checking In: Audio Note (UK) M8 RIAA & AN-S8L SUT, Duelund-Corona Project, Ortofon SPU GTX S phono cartridge, and more!


Greetings friends, I hope you are doing well. 🙂 I have been so busy lately with audio projects and life events that I don't know which way is up, but it's all good!  The Audio Note (UK) M8 RIAA phono pre & AN-S8L SUT combination is bedding-in nicely. I've listened to 104 LPs now of... Read More »


The Duelund-Corona 832A Project: Project primer & the Duelund CAST Air-Core Inductors!


Greetings friends, I hope you are well! 🙂 I'm in the "roll up your sleeves and get to work" phase for the Duelund-Corona 832A Project.  I'm also trying to be mindful of what I write as being a useful guide to the steps one goes through for building crossovers, so you can use what I... Read More »


The Duelund-Corona 832A Project: The resistance network!


Greetings friends, I hope you are well! 🙂 As a refresher, The Duelund-Corona 832A Project is about building new high-performance crossovers for my beloved vintage Altec 832A Corona loudspeakers (above) using the state-of-art Duelund CAST inductors and capacitors (below).  In particular, I'm building replacements for the stock Altec N800E crossover - or "dividing network" -... Read More »


Today's Fresh Catch: Capacitors & Inductors for the Duelund-Corona 832A Project!


It's exciting times here at my place with the arrival of the Duelund CAST pure copper capacitors and inductors for the Duelund-Corona 832A Project - woo hoo!  When the FedEx driver rang my doorbell yesterday, I knew I was in for a remarkable & exciting audio adventure when I saw the parcel from Frederik at... Read More »