User manual NAIM N-SUB

[. . . ] WORLD CLASS HI FI OWNERS MANUAL Speakers: SL2, allæ, Ariva, axent, axess, n-SATS, n-CENT, n-SUB. IMPORTANT In order to comply with current European safety regulations it is essential that the Naim loudspeaker connectors supplied with amplifiers and loudspeakers are used. Do not under any circumstances allow anyone to modify your Naim equipment without first checking with the factory, your dealer, or your distributor. For your own safety do not under any circumstances open Naim equipment without first disconnecting it from the mains. Warning: an apparatus with CLASS I construction shall be connected to a mains socket outlet with a protective earthing connection. [. . . ] Please read these instructions before installing and using the loudspeakers. Please also retain the packaging for future use. The performance of any loudspeaker will be influenced by the room in which it is located and even small changes of loudspeaker position can significantly influence the sound. Alignment with the listening position and proximity to room boundaries will in particular influence the subjective performance. The position of a centre channel loudspeaker tends to be influenced by the type and location of the associated video screen. However, the influence of the room boundaries and alignment to the listening position should still be taken into account. The axent and axess are designed to reproduce full bandwidth, full power signals and are intended to be positioned centrally just below the screen. If the location of the loudspeaker results in too much bass some adjustment of low frequency equalisation via the AV processor may be necessary. Best results from axent and axess are likely to be gained if they are directly coupled to the floor via a rigid, spiked stand. Both speakers are equipped with spike location pads on the underside to help enable such mounting. If however the screen stand is also to carry the speaker it is advisable to at least decouple the screen, perhaps with compliant pads, so that vibration from the speaker does not disturb the picture. However, the extreme sensitivity of some CRT tubes to low levels of magnetic flux may mean that, in rare cases, the shielding may not be sufficient. Should your screen suffer picture distortion caused by the proximity of a centre speaker contact your dealer or installer for advice. Loudspeakers, like many hi-fi components, will take time to stabilise and "run-in" and can be expected to improve with use even over a period of weeks. For this reason it is prudent not to finalise axent and axess positioning until they have been operating for at least one week. 8. 1 Connection If the axent or axess are to be used with Naim amplification, Naim loudspeaker cable will produce the best results and is necessary with some amplifiers. Cable length should be between 3. 5 metres and 20 metres (11. 5ft and 66ft). Your local retailer will be able to make up cables of the appropriate length. Connect the loudspeaker cables with their custom Naim plugs to the input sockets located on the rear of the enclosure. Ensure that the positive plug - identified by a rib on the side of the cable and a tag marked "pos" on the side of the connector body - is inserted to the red input socket. 8. 2 Tweeter Adjustment The tweeter is mounted on an adjustable suspension plate. It is important both that the tweeter "bounces" freely on the plate and that it is held in line with the front panel of the enclosure. If the tweeter does not bounce or it is not held in the correct position (i. e. Carefully remove, one at a time, the appropriate fixing screws and gently bend the appropriate arm or arms of the plate to correct the bend. Replace the screws, tightened as lightly as possible to ensure security, and re-test the "bounce". [. . . ] 11. 4. 6 Label A three character alpha-numeric display label can be defined for each n-SUB preset. Use the handset mode5or mode6 keys (control panel: mode) to select label, followed by the handset mute key to select the character position and the up or down keys (control panel: up or down buttons) to select an alphanumeric character. 11. 5 n-SUB Gain, Filter Frequency and Polarity Setting n-SUB gain, filter (freq) and polarity (invert) parameters will require some careful listening and experimentation if optimum subjective performance is to be achieved. Try to put yourself in the position of the film sound designer or music mix engineer and aim for a sound that is consistent, well balanced and free of undue bass or midrange emphasis. It may be useful to listen with and without the n-SUB by using its mute function. [. . . ]