Zaphod Beeblebrox Posted June 24, 2015 Posted June 24, 2015 I had an experience this week, which has caused me to author this thread. An SNA member sent me an Audio-gd DAC for repair. I diagnosed the fault as a failed power transformer, which was potentially a major problem if the part was not able to be supplied by the manufacturer, due to the large number of secondary windings (4) used. The client contacted Audio-gd and, after a couple of emails, they promised to send a replacement transformer. It arrived in less than a week, AND free of charge! Astonishing service. Even better, the original transformer, which was a toroidal type, was replaced with a vastly superior 'R' core type transformer. Kudos to Audio-gd for excellent service. As I have previously extolled, I have also found Parasound to offer superb backup service for their products too. I have found a few companies which offer zero backup for their products. I do not intend to mention them in this thread. 10
Guest Sime Posted June 24, 2015 Posted June 24, 2015 What are the advantages with the newer type transformer?
Zaphod Beeblebrox Posted June 24, 2015 Author Posted June 24, 2015 What are the advantages with the newer type transformer? Toroidal transformers are the absolute WORST choice for low level applications. Toroidal transformers are very closely coupled, thus they allow mains bourne interference to be transferred most efficiently. 'EI' type transformers are significantly better in their ability to isolate mains problems from products. Next up the ladder are 'R' core transformers. They are THE best choice, by a very considerable margin for low level audio products. 2
Gee Emm Posted June 24, 2015 Posted June 24, 2015 OPPO have provided me sensational after sales in the past. @Zaphod Beeblebrox How much would it cost to get you to upgrade my existing Audio-gd DAC toroidal transformer to a R type?
Guest Sime Posted June 24, 2015 Posted June 24, 2015 Interesting, thanks for that @@Zaphod Beeblebrox
Recommended Posts