Bowers & Wilkins DM601 User's Manual
Contents
1. OW NER 5 MANUAL DM 60 1 DM 6O0O 2 S EE LISTEN AND YOU LL FIGURE 1 FIGURE 2 FIGURE 3 INTRODUCTION Thank you for purchasing B amp W DM600 Series speakers since its foundation in 1966 the continuing philosophy of B amp W has been the quest for perfect sound reproduction Inspired by the company s founder the late John Bowers this quest has entailed not only high investment in audio technology and innovation but also abiding appreciation of music to ensure that the technology 15 put to maximum effect is also our policy to make sure the advanced features pioneered one product are incorporated into others we manufacture DM600 Series systems have cabinets with rounded edges to reduce sound diffraction the re radiation of sound waves from sharp edges that interfere with and blur the direct sound from the drive units incorporating woven Keviar cone bass midrange drive units for lowest coloration and maximum definition They also have alloy dome tweeters with magnetic fluid cooling to ensure good definition to the limits of audibility and maintain dynamics to high sound levels All these features were originally developed for the acclaimed B amp W 800 Series systems and go towards the realisation of fine transducers However no matter how good the speakers themselves they must work well into the listening room and time spent on the installation process will reap the reward of many hour2. ffles at least 0 5m 20in clear of walls Having the speakers too close to walis increases the level of bass relative to the midrange and may give a boomy quality to the sound FINE TUNING Before fine tuning the installation double check the polarity and security of the connections the level of bass is uneven with frequency this is usually due to strong excitation of resonance modes in the room Even small changes In the position of the speakers within the listening room can have a profound effect on the perceived sound quality by altering the excitation of these modes Try mounting the speakers along a different wall Even moving large pieces of furniture about can have an effect the general level of bass is too high try moving the speakers further away from the walls Conversely if you need more bass move the speakers closer to the walls Space behind the speakers also improves the impression of perspective on well recorded material the central image is poor try moving the speakers closer together or toeing them in so they point at or just in front of the listening area figure 5 If the sound is too harsh increase the amount of soft furnishing in the room For example use heavier curtains Conversely reduce the amount of soft furnishing if the sound is dull and lifeless Test for flutter echoes by clapping your hands and listening for rapid repetitions These can smear the sound but may be reduced by irregular s
3. haped surfaces such as bookshelves and large pieces of furniture Ensure the speakers are firmly supported Speaker stands should be regarded as part of the speaker and chosen with care Ask your dealer for advice on the best stands for your needs AFTERCARE The vinyl veneers normally only require dusting If you wish to use an aerosol cleaner remove the grille first by gently pulling it away from the cabinet Spray onto the cleaning cloth not directly onto the cabinet The grille fabric may be cleaned with a normal clothes brush after removing the grille from the cabinet Avoid touching the drive units especially the tweeter as damage may result FIGURE 4 FIGURE 5 DESCRIPTION DRIVE UNITS FREQUENCY BANGE FREQUENCY RESPONSE DISPERSION SENSITIVITY HARMONIC DISTORTION HOMIA AL IMPEDANCE CROSSOVER FREQUENCT POWER HANDLING MAX RECOMMENDED CABLE IMPEDANCE DIMENSIONS NET WEIGHT FIMISHES1 Z waoy 4th order vented bor rystem Vx 165mm 6 in Kevlor boss mid Tx 24mm Min metal doma high frequency of 50 and 70Hz 20 398 on reference axis Within 28 of response on rolerance axis Horizontal over 40 Vertical over 10 are BEdB sp LEIV Tm Ind amp Jrd harmonics lt 1 BEH Z0kHr 9048 spi Im BEI minimum 4 252 IkHu 25 W 100W concert into BL DM60 2 2 woy dth order venled box syrtem Te 180mm Tin 0 bosu
4. ng the speakers loosen the terminal caps and remove the links Use a separate twin cable from the amplifier terminals to each pair of speaker terminals figure 3 Correct polarity connection 15 even more critical in this case to maintain the frequency response of each speaker as well as the correct balance between left and right speakers The use of separate cables can improve the reproduction of low level detail by reducing interaction in the crossover and allowing optimum choice of cable for each frequency range Always make sure all the terminal caps are screwed down tight as otherwise they may rattle When choosing cable keep the total electrical impedance out and back below the maximum recommended in the specification In particular the cable to the tweeter should have low inductance otherwise the very high frequencies will be attenuated Ask your dealer for advice as the optimum cable will depend on the length required 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 Place the speakers on firm stands or bookshelves that place the tweeters approximately at ear level 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 5f apart to maintain left right stereo separation Keep the speaker ba
5. s listening pleasure Please read through this manual fully will help you optimise the performance of your audio system B amp W distribute to over 50 countries world wide and maintain a network of dedicated distributors who will be able to help should you have any problems your dealer cannot resolve UNPACKING ligure 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 packaging for future use 0 600 Series speakers are supplied in veneer matched pairs Check that your Speakers have consecutive serial numbers CONNECTIONS figures 2 amp 3 All connections should be made with the equipment turned off FIGURE 4 FIGURE 5 FIGURE 1 FIGURE 2 FIGURE 3 There are two pairs of gold plated terminals at tne back of each speaker one pair to the bass midrange and one pair to the tweeter which permit bi wiring or bi amplification if desired On delivery both pairs are connected together by high quality gold plated copper links for use with a single twin cable For single cable connection connect either of the positive terminals on the speaker marked and coloured red to the positive terminal on the power amplifier and negative black to negative figure 2 Failure to observe correct polarity will resull in poor sound balance and image focusing When bi wiri
6. vmid la 24mm lin metal dame high lragueney dB of 43 ond 57Hz 20 IdE on reference axis Within 2dB of responte on reference oxis Horizental over 40 ore Vertical 9048 sp 2 83 1m Znd amp 3rd harmonier lt 1 over 10 arc 60H 20 spl Tm Bi minimum 4 30 25W 120W continuous into BL on unclipped programme en unclipped programme 0 20 Haight 254mm 14 in Height 490mm 19 74 in Width 204mm 8 in Width 23 amp mm 9 jain Depth 244enim 9 Yi in 306mm 12 in 6 13 4 lb 9 Bleg 216 Ib Cabinet Black Ash vinyl Cabinet Black Ash vinyl Grille Black Cloth Grille Black Cloth LISTEN AND YOU LL SEE Kevlar registered trademark of Dupont B amp W Loudipooker Lid reserves the right to amend details of the specication without notice in line with technical developments Coppright BAW Loudspeokers Lid Printed in England BAW Loudspeakers Lid Meadow Rood Worthing 28X Tel 44 0 1903 524801 44 0 1903 524725 14553
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