American Acoustic Development C -11 User's Manual
Contents
1. L O o Fig 4 1 2 Power switch on off Upper position Power on Lower position Power off Middle position Auto on At this position the subwoofer amplifier is ina stand by mode awaiting an input signal When there is no signal the amplifier is shut down As soon as the signal appears the amplifier switches on If signal is absent the amplifier will shut down automatically after a pre determined period of time The power indicator is red when the switch is at OFF position and green when the switchis at ON or AUTO position 2 Volume Control Use this control to balance the level of the woofer with the level of your main speakers Crossover Frequency control If you are using small loudspeakers 4 to 6 woofers in your main system you will need to set the crossover frequency ata high position 100 to 160 Hz If your main speakers have larger woofers 8 and above you will need to set the crossover frequency to much lower position 40 to 80 Hz Generally the larger the speaker the greater the low frequency output will be If the frequency control is set too high the bass will appear boomy due to outputs of subwoofer and main speakers overlapping each other If it is set too low the bass will be ill defined and the subwoofer will sound detached from the rest of the system 4 Phase Control Use this control to determine the best possible bass performance of your system There can be interferenc2. PUTS OUTPUTS OUTPUTS o USE RCA CABLE FROM SW OUTPUT ON RECIEVER INPUT ON SUBWOOFER AAD American Acoustic Development LLC y RO Pir o o HIGHLEVEL Connection method 2 Fig 5 Connecting subwoofer between pre amplifier outputs and power amplifier inputs see Fig 6 1 5 CONNECTION METHOD 2 CONNECT RCA CABLE FROM PRE AMP LEFT amp RIGHT OUTPUTS TO SUB WOOFER LEFT amp RIGHT LOW LEVEL INPUTS CONNET RCA CABLE FROM POWER AMP le LEFT amp RIGHT INPUTS TO SUB WOOFER HH Hp REE EH SY LEFT amp RIGHT LOW LEVEL OUTPUTS 2 Fig 6 Connection method 3 Connecting subwoofer from speaker outputs of receiver see Fig 7 CONNECTION METHOD 3 o AAD American Acoustic Development LLC B weurth mourrurm aeg e e o o AUDIO AUDIO D a o O INPUTS OUTPUTS HIGH LEVEL L CONNECT A SPEAKER CABLE FROM LEFT MAIN SPEAKER OUTPUT TERMINALS ON RECEIVER TO LEFT HI LEVEL INPUT TERMINALS ON SUBWOOFER MAIN MAIN LEFT RIGHT SPEAKER SPEAKER ee ae 2 CONNECT A SPEAKER CABLE FROM LEFT HI LEVEL OUTPUT TERMINALS ON SUB WOOFER TO INPUT TERMINALS OF LEFT MAIN SPEAKER REPEAT PROCEEDURE 1 amp 2 FOR RIGHT SPEAKER USING RIGHT CHANNELS Fig 7 1 6 Setting up EQ or the Room Play some familiar pieces of music tha
3. al world subwoofers generally do not have a flat frequency response Only in ideal conditions such as open air or large anechoic test chambers do they have a perfect response measurement When a subwoofer is played in a listening room the bass frequencies can be up or down 10 dB from the ideal response The sound can have a boomy or ill defined bass that will impair the overall musical performance The Y 5 band equalizer is designed to control offending bass notes that booms louder than they should It features precisely aligned 1 3 octave equalization filters that are only found on the best professional audio equipment The cabinet has been designed using extensive computer modeling for the best possible alignment between driver and box Coupled with two high excursion 1 1 proprietary 10 drivers the C 11 produces clean powerful and controlled bass Three large rear firing vents ensure ventilation of both driver and amplifier for cool running at high power The vent s large bore and gas flowed cross section reduces air turbulence that causes audible distortion Functions and Connections Please refer to Fig 3 Front control panel and Fig 4 Back panel for functions on C 11 Subwoofer amplifiers VOLUME FREQUENCY PHASE MIN MAX 30 Hz 160 o 180 American Acoustic Development LLC INPUT gy OUTPUT AC INPUT CAUTION 10 A N NO USER SERVICEABLE PARTS INSIDE a i CE REFER TO OWNERS MANUA
4. ause damage to the subwoofer and your amplifier receiver Low level Input amp Output Connect this to the pre amp output of your amplifier receiver If you do not have a pre amp output or a power amplifier input you can connect up the subwoofer using the Low Level Input Output utilizing a tape input output amplifier receiver Connect the tape output to the Low Level Input on the subwoofer then connect the tape input to the Low Level Output on the Subwoofer To switch the subwoofer into the circuit switch the tape monitor input on your amplifier receiver Use this in conjunction with your receiver amplifier Connect this output to the power amplifier input of your amplifier receiver Power input socket and Fuse For continued protection replace only with same type fuse A spare fuse is enclosed for replacement Connection Please see diagrams below for different method of connecting the subwoofer to your main amplifier receiver It may be possible to use alternative connecting methods Please refer to the owner s manual of your amplifier receiver or seek professional advice from your retailer or installer CAUTION Before switching power on please make sure all connections are made properly i e positive to positive negative to negative Connection method 1 Connecting the subwoofer using dedicated subwoofer RCA output from receiver see Fig 5 CONNECTION METHOD 1 AUDIO AUDIO SPEAKER IN
5. by Phil Jones C 11 Powered Subwoofer Owner s Information American Acoustic Development LLC C 11 Powered Subwoofer Information Important Instructions 1 Read your owner s manual carefully before using the product Retain this manual for future reference 2 The subwoofer should be placed at a ventilated dry and cool location away from any heat sources such as radiators or amplifiers Do not obstruct the amplifier in the C 11 from ventilation Itis necessary that air can flow around the finned heat sink onthe rear panel ofthe amplifier 3 Donot use the subwoofer near water or expose it to rain or moisture 4 Always unplug the power cord first when making connections Switch power on only after you check and make sure all connections are made correctly 5 Unplug the power cord from the outlet when you are not going to use the subwoofer fora long period of time 6 To clean unplug the power cord from the outlet first Use a damp cloth only to wipe dust off the surface Do not use any liquid cleaners 7 Donot put coffee cups or other objects on top of the cabinet They can be shaken off when the subwoofer is in operation as it can produce a lot of vibration Introduction C 11 is ahome theater subwoofer equipped with a build in equalizer The 22 5 band equalizer is a powerful tool in correcting anomalies of subwoofers caused by room acoustics It will greatly increase subwoofer performance when used properly In the re
6. e between your main speakers and subwoofer at the frequency where they cross over due to placement room acoustics and type of main speakers used By carefully positioning the subwoofer in the room in combination with the level and crossover control you should be able to get a seamless transition between your main speakers and subwoofer Start with the full anticlockwise 0 position This means that the subwoofer will push out positive pressure wave corresponding to a positive electrical input The 180 full clockwise position inverts this so the subwoofer will put out a negative 1 3 pressure wave You can use this position if you are unable to get a good integration between the subwoofer and main speakers Equalizer on off At off position the amplifier will function normally without the effect of the 5 band equalizer 5 band Equalizer Please refer to Setting up EQ forthe Room High LevelInputs L amp R These inputs should be connected to the left and right speaker terminals of your amplifier receiver if you intend to connect the subwoofer using this option instead of the low level RCA input connections High Level Output L amp R You could connect your main speakers from the subwoofer amplifier instead of the main amplifier receiver Use this option if you are connecting the subwoofer up via the High Level Input CAUTION Do not use both low level and high level connection methods simultaneously This may c
7. greatest bass output but may not provide the best sound as this position will cause maximum room mode resonance You can start with this position and then move the subwoofer to different areas until you find the sound satisfactory The best method is to try different positions Keep aclearance of 1 00mm 4 from the wall or furniture to provide best performance 1 7 Service and Warranty The C 11 Subwoofers have a warranty period of 1 year starting from the date of purchase This warranty is provided to the original owner who purchased the product from an authorized 24 dealer This warranty covers defect in materials or workmanship that occurs in normal use only and excludes damage that results from abuse mis use accidents shipping or repairs or modifications by anyone other than authorized 44 representatives The warranty is void if serial number has been removed Should you need service on your speakers please bring it to the dealer whom you pur chased from along withsales slip If this is not possible call or write to American Acoustic Development LLC 8559 Page Ave St Louis MO 63114 USA Tel 314 814 3383 Fax 314 628 9941 E mail info aadsound com www aadsound com C 11 Product C 11 Specifications Amplifier type Solid state Class A B Power 160 watts continuous into 4Ohm Woofer Proprietary 10 diaphragm Aluminum Cone 60 Az magnet 2 voice coil Frequency res
8. ponse 30 Hz to 160 Hz 3 dB Electronic crossover Continuously variable from 30 Hz to 160 Hz 24dB octave Phase control Variable 0 180 5 Band EQ 10dB at 25Hz 40Hz 60Hz 80Hz 100Hz inpnts Low level RCA 300mv sensitivity in both channel P High level 5 way binding post 10v sensitivity Outputs Low level RCA High level 5 way binding post Enclosure type Vented bass reflex Cabinet dimensions 514 H x375 W x445 D mm Net weight 23 5 Kg Finish Cherry Classic Black viny1 1 9 by Phil Jones American Acoustic Development LLC 8559 Page Ave St Louis MO 63114 USA Tel 314 814 3383 Fax 314 628 9941 E mail info aadsound com www aadsound com
9. t have prominent bass lines Start with the EQ switched out and then adjust the EQ filters one by one switching the EQ in and out It is better to start with the EQ cutting the frequencies and not boosting them Remember that a 10 dB boost is adding ten times the power at that frequency so it would be easy to overload the system at high power levels with the EQ sliders set at maximum Room Size and Room Position The size of the room and the position of sub woofer placement will also determine low frequency limit of the subwoofer So by adjusting the EQ settings the ideal response can be obtained without having to place the subwoofer in an unpractical location Small rooms usually add gain to low frequencies which can be overpowering to the rest of the music Large rooms need greater low frequency energy to sound balanced The EQ settings can be adjusted to fit the room size The 5 band equalizer should be used with great caution The power levels to the speaker can be boosted by as muchas 10 times So if the subwoofer is running at 100 watts the EQ boost at maximum will try to push the amplifier to an impossible 1000 watts Although the amplifier and speakers are designed to handle overload conditions it is still possible to cause damage from mis use Placement of Subwoofer The subwoofer can be placed virtually anywhere in your room without affecting the stereo image of your main speakers Placing the unit in acorner of the room will yield the
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