NHT CS-6.1 Ci Speaker User Manual
Contents
1.2. cross braces horizontally roughly one foot to either side of the speaker location Use wood glue and extra screws when attaching the drywall to the joists around the speaker Additionally once the speaker cutout has been made in the drywall add a strip of wood glue where the drywall meets the joists and cross braces For more controlled bass response add insulation to the ceiling cavity around and behind the speaker to provide acoustic damping Be sure to add the same amount of insulation to speakers in the same room to ensure consistent sound Use R 12 or R 19 fiberglass insulation and be sure to wear protective gloves to avoid contact with the fibers If the insulation is paper or foil faced position the paper or foil side away from the speaker If the new or existing insula tion is the loose type place a thin sheet of fiberglass over the top of the speaker to keep out small debris gently cut through the lath being careful not to vibrate plaster off the ceiling 5 To mount the CS 6 1 Ci or CS 6 3 Ci into an existing ceiling the use of a mounting bracket is optional 6 Connect the speaker cable to the spring clips CS 6 1 Ci or spring posts CS 6 3 Ci on the back of the bezel making sure to observe correct polarity see Connections 7 The bezel with driver mounts to the existing ceiling via four plastic mounting clamps on the back of the bezel that swivel to sandwich the bezel in place between its protruding out
3. bezel with driver attaches to the bracket via four plastic mounting clamps on the back of the bezel that swivel to sandwich the drywall between the bezel frame and the clamps fig 4 First rotate the mounting clamps counterclockwise so that the body of the bezel can slide through the mounting bracket Exercise caution not to damage the driver 7 Holding the bezel in one hand rotate the mounting clamps via the four Philips nhead screws surrounding the driver on the front of the bezel fig 5 Tighten screws snugly making sure not to over tighten as this may compromise the fit of the bezel The use of power screwdrivers is not recommended The absorptive strip on the drywall side of the bezel frame reduces unwanted vibrations against the drywall and will compress slightly to allow the bezel frame to rest flush against the wall 8 If the bezel frame and grille are to be painted in the ceiling install the paint shield to protect the dri ver from overspray see Painting Once painting is complete remove the paint shield and set it aside for use in Step 9 9a CS 6 1 Ci only The CS 6 1 Ci uses two absorptive foam pads on the inside of the grille to con trol sound radiation fig 6 There are two circular sections in the center of the paint shield that serve as templates for attaching them Punch out the larger circle and the smaller circle from within it Place the paint shield minus the circular sections on the inside of
4. the metal grille and attach the larger absorptive pad onto the grille through the circular cutout Then attach the smaller absorptive pad on top of the larger pad using the larger cutout circle as a template When attached correctly the two pads resemble a stepped cone 9b CS 6 3 Ci only The CS 6 3 Ci uses one absorptive foam pad on the inside of the grille to con trol sound radiation fig 6 There are two circular sections in the center of the paint shield that serve as templates for attaching it Punch out the larger circle not the smaller circle within it Place the paint shield minus the circular section on the inside of the metal grille and attach the larger absorp tive pad onto the grille through the circular cutout Do not attach the smaller absorptive pad 10 Attach the metal grille by inserting it into the grooves in the bezel CS 6 1 Ci 8 5 16 Diameter E Installation Existing Construction retrofitting finished ceilings Warning Exercise caution when drilling into existing ceilings Do not drill through existing wires pipes conduits heating or air conditioning ducts If you feel resis tance while drilling stop immediately Do not install the speaker into a drop ceiling or soft ceiling as this type of construction will not support its weight 1 4 Diameter 1 Using a studfinder or the knocking method locate the joists in the ceiling area where you wish to mount the speaker The speaker will be m
5. two thin coats making sure to let the first coat dry completely before applying the second This will avoid running When using a compressor and spray gun apply the paint using its finest setting Painting with a brush is not recommended but when necessary be sure to thin the paint so as not to cover the holes in the grille If paint does cover any of the grille holes poke them out with a paper clip 3 Once painting is complete remove the paint shield from the bezel by carefully punching out the round hole in the middle and using this hole to pull the shield free Keep the paint shield and the round cutout as they will serve as tem plates for attaching the absorptive foam pad s to the inside of the grille E Connections Before connecting speakers to your system it is important that you turn off the power to your amplifier receiv er to avoid damage to the equipment Before installing the CS 6 1 Ci or CS 6 3 Ci map out the wiring paths between the speakers and the amplifier Make sure that the speaker cable does not rest on sharp or pointed objects The CS 6 1 Ci and CS 6 3 Ci are compatible with virtually all quality amplifiers Proper wiring of the speakers is essential to good sound At a minimum 16AWG 2 conductor speaker cable is recommended for runs of 10 feet or less with heav ier special purpose speaker cable used for longer runs When permanently installing cable inside walls be sure to use cable that is rated for in wall use an
6. Thank you for your purchase of the NHT CS 6 1 Ci or CS 6 3 Ci in ceiling loudspeaker Please take a few minutes to read through this Owner s Manual prior to installing your new speakers The information provided will help you to obtain maxi mum performance from your audio system If you have questions or need assistance at any time during the installation or operation of your new speakers please call your NHT Dealer or our Toll Free Customer Hotline at 1 800 NHT 9993 Specifications CS 6 1 Ci CS 6 3 Ci System Type 2 way in ceiling design 2 way in ceiling design Driver Complement 6 5 long throw polypropylene woofer and 6 5 long throw polypropylene woofer and 1 soft dome tweeter coaxially mounted 3 x 1 soft dome three tweeter array Crossover 2 2KHz 18dB octave high pass 2 2KHz 18dB octave high pass and 12dB octave low pass and 12dB octave low pass Response 69Hz 20KHz 3dB 66Hz 20KHz 3dB Sensitivity 86 5dB 2 83V at 1M 86 5dB 2 83V at 1M Impedance 8 ohms nominal 8 ohms nominal Recommended Power 10W ch minimum 100W ch maximum 10W ch minimum 100W ch maximum Inputs Spring clips Professional grade spring posts Weight 4 6 lbs each 5 Ibs each Cutout Diameter 8 13 16 without PCB 8 1 2 8 13 16 without PCB 8 1 2 Bezel Diameter 9 11 16 9 11 16 Depth behind wall 4 13 16 4 13 16 Finish Matte white paintable Matte white paintable Specifications are subject to change without notic
7. ad using the larger cutout circle as a template When attached correctly the two pads resemble a stepped cone 10b CS 6 3 Ci only The CS 6 3 Ci uses one absorptive foam pad on the inside of the grille to control sound radiation fig 6 There are two circular sections in the center of the paint shield that serve as templates for attaching it Punch out the larger circle not the smaller circle within it Place the paint shield minus the circular section on the inside of the metal grille and attach the larger absorptive pad onto the grille through the circular cutout Do not attach the smaller absorptive pad 11 Attach the metal grille by inserting it into the grooves in the bezel E Painting The bezel frame and grille of the CS 6 1 Ci and CS 6 3 Ci are finished in a matte white powder coated finish that may be painted to match the ceiling The frame and grille may be painted either before or after the speaker is installed Keep in mind that the grille contains hundreds of tiny holes that are essential to the sound of the speaker Take care not to cover these holes with paint 1 Paint the bezel frame and the grille at the same time using the same paint Use the supplied paint shield to protect the driver and inside of the bezel from overspray Fold the edge of the shield down and insert it into the groove in the bezel where the grille would attach Be careful not to punch through the round hole in the middle 2 When using spray paint apply
8. ard 2 wood joists Their moisture resis tant drive units allow them to be installed in moisture prone interior environments such as bathrooms indoor swimming pool and sauna rooms Outdoor use is not recommended Spend some time considering placement prior to installing the speakers Once they are installed they are permanent so their location should be selected carefully When possible locate the speakers at least 3 feet from adjacent side walls The speakers should be mounted on a flat surface to ensure a good seal between the baffle and the mounting surface When possible position the speakers so that they are equidistant from the most likely listening area If the CS 6 1 Ci or CS 6 3 Ci is going to serve as rear Surround channels in a home theater system make sure to install them toward the rear of the room the opposite side from where the television will likely be If you wish to get an idea how they will look try taping the supplied cutout templates to the ceiling E Parts List each speaker Speaker pack includes 1 Bezel with driver 1 Metal grille 2 Absorptive foam pads 1 paint shield cutout template Metal grille QO Mounting Bracket pack includes 1 Mounting bracket 2 Mounting wings 4 5 x 50mm flathead screws a Tools Needed Bezel with Paint shield Mounting Mounting 2 Philips screwdriver driver cutout template bracket wing Pencil Tape measure Utility knife or
9. ch vary from state to state To Obtain Service NHT has appointed a number of authorized service companies throughout the USA should your product ever require service To receive warranty service you will need to present your sales receipt showing place and date of original owner s transaction To find the name and address of the nearest authorized NHT service location call or write Customer Service Department Now Hear This 6400 Goodyear Road Benicia CA 94510 800 NHT 9993 Please do not return product to this address It is not a service location Keep this warranty with your sales receipt Record date and place of purchase for future reference Tech Tips Placement For best results position the CS 6 1 Ci and CS 6 3 Ci 20 to 30 degrees off axis from the listening position The polar plots below indicate smoother frequency response from these areas 180 170 9 170 160 160 150 150 140 5 140 130 lt q Jf 130 i 10 aN va 120 lt 120 SAA ie J 110 SN oy ae 110 100 j SANA A 100 170 160 a 150 140 5 130 10 120 15 110 100 Sa 90 80 70 60 180 170 160 150 140 130 120 CS 6 1 Ci dB 1kHz B 2kHz dB 4kHz dB 8kHz 110 60 100 90 80 70 IJI SPECIALTY AUDIO CS61POL AMPL dBr vs FREQ Hz 21 OCT 97 11 33 34 CS 6 3 Ci dB 4kHz dB 1kHz B 2kHz dB 8kHz
10. d has special jacketing for fire prevention In the U S the U L standard is CL 2 CL 3 and CM cable and in Canada the CSA standard is FT4 cable The cables should be run in accor dance with National Electrical Code and any applicable local building codes Prepare the cable by stripping 1 4 to 3 8 of insulation from the ends and twisting the exposed wire strands tightly The spring loaded binding posts on the back of the speakers will accept raw wire only Be sure to wire both the left and right speakers in phase That is the Positive red terminal on the amplifier output must be connected to the corresponding Positive red terminal on the speaker Likewise with the Negative black terminals All speaker cables have some sort of marking along one or both conductors to help you make the correct connections Incorrect speaker phase is indicated by weak bass and the lack of a well defined stereo image E Operation The CS 6 1 Ci and CS 6 3 Ci are designed to handle a wide range of listening levels but every speaker has limits It is important to use common sense and listen for signs of possible distress from the speakers Underpowered amplifiers are most often the cause of speaker damage For example a 60 watt amplifier runs out of power when called upon to produce more than 60 watts and the resulting distortion can damage the speaker If you tend to listen at high volume lev els more powerful amplifiers are preferable because they are les
11. e in accordance with our policy of continuously upgrading the performance of our products E Design NHT loudspeakers are designed to deliver refined musical sound from attractive and affordable packages Our efforts are guided by the study of human hearing and are optimized for real world use Every NHT speaker undergoes rigorous testing and quality control at the factory to ensure you years of listening pleasure The CS 6 1 Ci and CS 6 3 Ci are designed to deliver the sonics and value of NHT s acclaimed freestanding speakers while offering the invisibility of in ceiling installation The drive units are custom designed to achieve a level of performance not normally associated with in ceiling speakers while its intuitive mounting system makes it ideal for new or existing construction The CS 6 1 Ci features one coaxially mounted tweeter while the CS 6 3 Ci employs NHT s innovative three tweeter array for more even sound dispersion to a wider range of listening areas Caution The CS 6 1 Ci and CS 6 3 Ci should be installed by an experienced and licensed custom installation profes sional Be sure that the installer possesses sufficient skill the proper tools knowledge of local fire and building codes and a familiarity with the structure of the building especially wall and or ceiling materials layouts electrical and plumbing lines etc E Placement The CS 6 1 Ci and CS 6 3 Ci are designed for in ceiling installation between stand
12. er frame and the rear surface of the drywall First rotate the mounting clamps counterclockwise so that the body of the bezel can slide through the cutout in the ceiling Exercise caution not to damage the driver fig 4 8 Holding the bezel in one hand rotate the mounting clamps via four Philips head screws surrounding the driver on the front of the bezel fig 5 Tighten screws snugly making sure not to over tighten as this may compromise the fit of the bezel The use of power screwdrivers is not recommended The absorptive strips on the back the bezel frame reduce unwanted vibrations against the drywall and will compress slightly to allow the bezel frame to rest flush against the ceiling 9 If the bezel frame and grille are to be painted in the ceiling install the paint shield to protect the driver from overspray see Painting Once painting is complete remove the paint shield and set it aside for use in Step 10 10a CS 6 1 Ci only The CS 6 1 Ci uses two absorptive foam pads on the inside of the grille to control sound radia tion fig 6 There are two circular sections in the center of the paint shield that serve as templates for attaching them Punch out the larger circle and the smaller circle from within it Place the paint shield minus the circular sections on the inside of the metal grille and attach the larger absorptive pad onto the grille through the circular cutout Then attach the smaller absorptive pad on top of the larger p
13. keyhole saw Level Wire strippers Safety goggles Protective gloves Absorptive z Foam Pads e Tech Tips Pre Wiring for New Construction 1 For best results avoid running speaker cable near electrical wire as it may induce a 60Hz hum in the audio signal It s a good idea to run the speaker cable after the electrical wiring has already been completed so that you can route the speaker cable at least three feet away from the electrical wiring If speaker cable and electrical wiring must run parallel install the cable within a metal conduit Note that low voltage wiring doorbell intercom telephone security etc are unlikely to induce hum and can typically be run parallel to speaker cable with no detrimental effects 2 When drilling holes through wall studs or ceiling joists use a drill bit that is at least as wide as the speaker cable that will be routed through them Always drill through the center of the stud or joist If the hole must be drilled within one inch of the edge of a wall stud add a nail plate to the drywall side to protect the cable from possible nails and screws put in the wall later Line up the holes in the studs or joists as you go so that pulling the cable through them will be easier E Installation New Construction unfinished ceilings 1 Once you ve selected the desired loca
14. or rebuilt at the option of NHT What s Not Covered This warranty does not cover any product which is used in any trade or business or in an industrial or commercial application This warranty does not cover the cabinet or any appearance item or any damage caused to the product resulting from alterations modifications not authorized in writing by NHT accident misuse or abuse damage due to lightning or power surges or being subjected to power in excess of the speaker s published power rating This warranty does not cover the cost of parts which would otherwise be provided without charge under this warranty obtained from any source other than an authorized NHT service location This warranty does not cover defects or damage caused by the use of unauthorized parts or labor or from improper maintenance Altered defaced or removed serial numbers void this warranty Your Rights The liability of NHT will be limited to the purchase price of the product and NHT will not be liable for incidental or consequential damages NHT limits its obligations under any implied warranties under state laws to a period not exceeding the warranty period Some states do not allow limitations on how long an implied warranty lasts and some states do not allow the exclusion or limitation of incidental or consequential damages The above limitations or exclusions may not apply to you This warranty gives you specific legal rights and you may have other rights whi
15. ounted between adjacent joists no closer than two inches from either joist 2 Determine that there are no obstructions above the desired cutout area This may be accomplished by drilling a hole in the center of the cutout area and using an L shaped piece 1 of metal like a coat hanger to feel around above the ceiling If you discover an obstruc Studs wert tion fill the hole with patching compound and try another location _ _ i 3 If there are no obstructions found above the ceiling use the supplied cutout template and j a pencil to draw a 8 1 2 diameter outline of the area to be cut out Begin by drilling a hole on the inside of the circle with a 1 4 bit Then cut out the ceiling section with a utility knife or keyhole saw following the line traced around the cutout template fig 7 If the ceiling is painted use the keyhole saw Once installed the bezel outer frame will extrude out about 1 2 inch beyond the perimeter of the cutout to hide minor imperfections in the cutout 4 If the ceiling is constructed of lath and plaster outline the penciled circle with masking tape drill a 1 4 hole and use a utility knife to cut through the plaster down to the lath Use a saber saw with a metal cutting blade or a pair of tin snips to Tech Tips Optimizing Sonic Performance Bass response is smoothest when the speaker is mounted into a rigid ceiling that flexes very little For improved per formance add 2 x 4
16. s likely to run out of power Noticeable distortion or harsh breakup is an indication that either your amplifier or your speakers are running beyond their capacity and the volume should be decreased Speaker damage most often occurs from sustained high volume levels not from transient sounds or brief musical peaks Excessive boosting of bass treble or equalizer controls can worsen the problem and is not recommended E Maintenance The CS 6 1 Ci and CS 6 3 Ci require minimal maintenance under normal use The grille and bezel frame may be cleaned using a damp cloth or a mild non abrasive cleaner Do not expose the speakers to direct sunlight or high temperatures Do not attempt to clean the actual drivers CS 6 1 Ci and CS 6 3 Ci In Ceiling Loudspeakers OWNER S MANUAL Now Hear This 535 Getty Court Benicia CA 94510 800 NHT 9993 Limited Warranty Valid Only in the U S A Warranty Period For the period of 5 years for parts and 5 years for labor from date of original purchase the warranty period from an authorized NHT dealer Now Hear This NHT warrants that if our product fails to function properly under normal use due to a manufacturing defect when installed and operated according to the owner s manual instructions enclosed with the unit it will be repaired or replaced with a unit of comparable value at the option of NHT without charge to you for parts or actual repair work Parts supplied under this warranty may be new
17. tion for the speaker begin by installing the mounting bracket between adjacent ceiling joists First attach the mounting wings to the bracket by inserting them into the locking plastic tabs in the side of the bracket fig 1 ai 2 The wings feature progressively elongated sections 1 1 2 2 2 3 3 with screw holes spaced in one inch increments Attach the wings to the joists O with the 5 x 50mm flathead screws For maximum stability use two screws for each wing Break off the extra portion of the wing by snapping it at one of the Q j pre molded break lines fig 2 oO 3 Complete the pre wiring before the drywall goes up see Tech Tips Pre Wiring for New Construction Leave an extra few feet of speaker cable and tie it to the the mounting bracket for later 4 During the drywall phase cut a hole 8 13 16 around the bracket so that the drywall surrounds the protruding lip of the mounting bracket Once installed the bezel outer frame will extrude out about 1 2 inch beyond the perimeter of the cutout to hide minor imperfections in the cutout fig 3 5 After the drywall is complete connect the speaker cable to the spring clips CS 6 1 Ci or spring posts CS 6 3 Ci on the back of the bezel making sure to observe correct polarity see Connections CCCUK N la 6 The
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