User manual THETA DIGITAL CASANOVA

[. . . ] THETA DIGITAL C O R P O R A T I O N Casa Nova Owner's Manual Digital Done Right TM PREFACE CONGRATULATIONS You have just acquired the most advanced component for the control and processing of audio and video ever to have been developed. IMPORTANT Save all packaging in a dry place away from fire hazards. Your Casa Nova is a precision electronic instrument and should be properly packaged any time shipment is made. In the unlikely event that you have to return your Casa Nova to the factory for service, or if you send it to us for updating, the original packaging will best protect the unit from shipping damage. In order to achieve the fullest flexibility and enjoyment from your Casa Nova, we at Theta recommend that you read this manual in full before connecting the unit to your audio/video system. WARNING United Stated law prohibits disposition of these commodities to Libya, Laos, North Korea, Cambodia or Cuba unless otherwise authorized by the United States. NOTE: This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to Part 15 of the FCC rules. [. . . ] Then, the high pass signal is subtracted from the original input signal, resulting in the low pass signal, which is usually routed to the subwoofer. A positive attribute of this type of crossover is that if the high and low pass signals are added together, an exact replica of the original input signal results, 22 thus the term "phase perfect". A potentially negative attribute of this type of crossover is that, due to phase relationships and vector mathematics, higher order filters (12, 18, 24 dB/octave) always produce 6dB/octave low pass slopes, in terms of electrical energy sent to the subwoofer. The high pass portion will have the expected 6, 12, 18 or 24 dB /octave slope. Due to this phenomenon, this type of crossover is best suited for subwoofers that can operate linearly up to the 500 Hz range. Please consult your dealer or subwoofer manufacturer to determine if this is suitable for your particular subwoofer. If the subwoofer is capable of handling this range, this is potentially the best sounding of Casa Nova's crossover types. Butterworth This is the most common type of crossover used in home theater, speakers and outboard electronic crossovers. Separate high and low pass slopes and crossover frequencies may be set for speaker sets [Left/Right], [Center] and [Surround Left / Surround Right]. Additionally, it is possible to invert the phase of the low pass for each of these speaker sets. This allows precise tailoring of the subwoofer response to the main speaker's response. A negative attribute of this crossover type is that the high and low pass signals have different phase shifts. Linkwitz-Riley This type of crossover, developed in 1976 by Siegfried Linkwitz and Russ Riley, eliminates some of the inherent problems of Butterworth filters. Specifically, a Butterworth filter of 12, 18 or 24 dB/octave (or higher) slope exhibits different phase shifts between the high and low pass outputs. A Linkwitz-Riley alignment solves this problem, as it exhibits zero phase difference between outputs at all frequencies. Acoustically, this means that if the sound sources are in proper time-alignment, a smoother frequency response will be realized at the listening position. The Linkwitz-Riley crossover is only applicable to slopes of 12 and 24 dB/octave. A proper Linkwitz-Riley crossover with a 12dB slope should have the low pass portion inverted. A note on crossovers Casa Nova's complement of crossover options can at first appear daunting. Most surround sound processors offer a simple selection to set their crossovers: Speaker Small or Speaker Large. When set to small, normally a 12dB/octave Butterworth crossover is performed at 80Hz. This simple setting does not take into account the huge variations in speaker design and room acoustics and more often than not results in non-optimum performance. [. . . ] Operating Temperature: Storage Temperature: Relative Humidity: 32 to 95 F (0 to 35 C) -22 to 167 F (-30 to 75 C) 95% maximum without condensation. Remote Control: 1 hand-held, battery powered control unit uses 2 AAA batteries. Specifications subject to change without notice. 67 90 DAY LIMITED WARRANTY TERMS AND CONDITIONS (5 Year optional extended service contract) 1. Theta Digital Corporation, henceforth referred to as Theta, warrants the product designated herein to be free of manufacturing defects in material and workmanship, subject to the conditions set forth herein, for a period of 90 days from the date of purchase by the original purchaser, henceforth referred to as purchaser. If the purchaser registers the unit with Theta by mailing in the warranty card, together with a copy of the bill of sale, within 14 days of the date of purchase, said purchaser will be registered for an extended service contract. [. . . ]