“An industrial, computer rated dual triode… This tube is also like a 12AV7 and will work wonders in any 12AT7 spot, and may be just the ticket if you want to boost the gain of a 12AU7 circuit” Read
“6414’s are still used by MANLEY in some of their tube pro (studio) gear and also in some VTL amps, thus this tube should have some audio merits. Certainly worth a try.”
The Raytheon 6414 Black Plates is a great-looking tube that delivers impressive overall sound quality, especially when used in a McIntosh 275. It provides a warm and rich sonic profile complemented by a notably transparent top end, making it a strong contender for high-end audio setups. While it performs admirably, it doesn’t quite reach the transparency levels of the Telefunken 12AT7 short, gray smooth plates, with an estimated 10% difference in clarity between the two.
* Sound Character: Warm and rich tonality that adds body to the music.
* High Frequencies: Features a great transparent top, though it falls slightly short of the absolute best European vintage tubes.
* Build: An industrial-grade, computer-rated tube that is aesthetically pleasing and robustly constructed.
* Comparison: Very close to the legendary Telefunken 12AT7, offering about 90% of its transparency at what is often a more accessible price point.
Final Verdict: The Raytheon 6414 Black Plates is a highly recommended alternative for 12AT7 or 12AU7 circuits, offering a lush, high-quality sound that holds its own against the industry leaders.
Also tried it in Dared VP-300B. The same results – good sound, but transparency is not as good as the best tubes out there. Compared it to RCA 5963 – RCA is a clear winner, but again the difference is 5% – hardly noticeable.