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Photos and specs Bowers & Wilkins CDM 9NT |
manual abstract
.................................15 Dansk .........................................17 Slovenska navodila ..................18 .........................................20 ........................................21 >0.5m >1.5m >0.5m . . . Figure 6 INTRODUCTION Thank you for purchasing the B&W CDM™9NT speakers. Founded in 1966, B&W has always striven for perfect sound reproduction in its products. To this end, the company has invested heavily in research and development in order to maintain its position at the forefront of acoustic design. Through the years, B&W has introduced many advanced features and techniques. Although many of these have been developed initially for the more expensive models, our “waterfall” design policy has seen them incorporated, wherever possible, elsewhere in the product range. Features to be found in the CDM™NT Series include cabinets with contoured edges to reduce sound diffraction (the radiation of sound waves from sharp edges that interfere with and blur the direct sound from the drive units). An integral part of the CDM™ range is the use of Kevlar® cone bass/midrange drive units for lowest coloration and maximum definition. The treble units incorporate Nautilus™ tube technology, which eliminates resonances behind the dome diaphragm. It is important to spend time setting up the speakers, as care spent on the installation process will reap the reward of many hours of listening pleasure. Reading this manual fully will help you obtain the best from your audio system. B&W distributes to over 65 countries worldwide and maintains a network of dedicated distributors who will be able to help should you have any problems your dealer cannot resolve. Their mailing addresses can be found on the web site or by calling B&W direct. UNPACKING (Figure 1) • Fold the top carton flaps right back and invert the carton and contents. • Lift the carton clear of the contents. • Remove the inner packing from the product. • We suggest you retain the packing for future use. Check in the carton for: • 4 Spike feet with lock nuts • 1 Foam bung • 1 International warranty booklet The midrange drive unit is fitted into the enclosure using flexible anti-vibration mounts. To prevent excessive movement of the drive unit in transit, a clamping disc is fitted to the rear mounting point on the back of the enclosure, which should be removed before using the speaker. To remove the disc, unscrew the crosshead screw in the centre. A label is fitted to the clamp to further illustrate the procedure. Retain the disc and screw for future transport of the speaker. Removal of the clamping disc reveals a larger slotted screw head. This screw sets the tension of the anti-vibration mount. Its position is pre-set at the factory and should not be altered. If the setting becomes altered accidentally, refer to your B&W dealer to have it correctly adjusted. CONNECTIONS (Figure 2 & 3) All connections should be made with the equipment switched off. There are 2 pairs of terminals at the back of the speaker which permit bi-wiring if desired. On delivery, the separate pairs are connected together with high-quality links for use with a single 2-core cable. For single cable connection, leave the links in place and use either pair of terminals on the speaker. Ensure the positive terminal on the speaker (marked + and coloured red) is connected to the positive output terminal of the amplifier and negative (marked – and coloured black) to negative. Incorrect connection can result in poor imaging and loss of bass. To bi-wire, remove the links by loosening the terminal caps and use a separate 2-core cable from the amplifier to each pair of terminals. This can improve the resolution of low-frequency detail. Observe the correct polarity as before. When bi-wiring, incorrect connection can also impair the frequency response. The terminals accept bare wire. Always make sure terminals are screwed down tight as otherwise they may rattle. Ask your dealer for advice when choosing cable. Keep the total impedance below the maximum recommended in specification and use a low inductance cable to avoid attenuation of the highest frequencies. POSITIONING (Figure 4) Some experimentation with the position of the speakers is well worthwhile to optimise the interaction between them and the listening room. However, as an initial guide: • Do not fit the spike feet until you have found the best position for the speakers. • Place the speakers and the centre of the listening area approximately at the corners of an equilateral triangle. • Keep the speakers at least 1.5m (5ft) apart to maintain left-right stereo separation. • Keep the speaker baffles at le...