The crossover was set one octave above this natural cut-off, reducing distortion significantly. With this design change, not only was the whole woofer cone unobstructed, but the wider horn aperture meant a lower cut-off frequency for the tweeter. Tannoy's first Dual Concentric, released in 1947, improved upon the coaxial principal by utilizing a specially-shaped (and expensive) 15" woofer cone that served as the outer flare of the horn tweeter. The Duplex featured a conventional horn tweeter with its compression driver mounted within the center of the woofer's magnet structure, and the outer flare of the horn in front of the woofer cone. The latter is commonly known as the "604"-probably the most popular soffit-mounted studio speaker of all time.
The original coaxial speaker was the Altec Duplex, first available as a 12" version in 1941 followed soon thereafter by a 15" version in 1943. So I was excited to demo Tannoy's top-of-the-line Ellipse powered monitors, which use the British company's trademarked Dual Concentric technology. #50) that I have in my living room for their accurate imaging these were my first long-term experience with coaxial drivers featuring a tweeter mounted within the center of the woofer. It will even remember your bookmarks.I love the Bag End M-6 Time-Align monitors (Tape Op Use the portable version of FireFox Legacy 52.9ESR and install it on a USB stick. Using a work computer or not allowed to install something? No problem. You can download this version of FireFox here. If you can, we absolutely recommend you upgrade your operating system to a newer version. Have you been wondering why you can't access a lot of websites anymore? It's time to jump off the sinking ship.įor your own safety, and that of our other visitors, we ask that you please download and install FireFox version 52.9ESR for WindowsXP, which has modern secure connection support and does run on your operating system. Unfortunately it's very difficult to maintain modern security practises while also having backwards compatibility with WindowsXP. In fact, less than 10% of websites support SSLv3 and that number is dropping every day. The bad news? Your operating system (WindowsXP) is now out of date and cannot properly handle modern secure connections. The good news is this server now serves its web pages over a secure connection using modern encryption protocols. Please use FireFox on WindowsXP to continue browsing diyAudio. IE and Chrome on WindowsXP are now unsupported.
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