ALF40 installation manual
Contents
1. built in protection circuit 40UJ continuous 8 Ohms 4 Ohm when used in passive configurations with AIUJX speakers 60Hz 150Hz 6dB 24dB octave slope 88dB 1m 2 83V RMS 103dB Front or end convertible length adjustable 39mm 1 55 43mm 1 7 3 way binding post accepts 4mm plugs 358 14 1 _ D 43 1 7 134 5 25 64 2 5 v c TECHNOLOGIES d Amina Technologies Ltd Cirrus House Glebe Road Huntingdon Cambs PE29 7DX England tel OO 44 1480 354390 fax 00 44 1480 356564 u Jh2. F40s will be necessary In this scenario the amplifier will need four independent channels Setup Tips When setting up any of the above system scenarios it is advised to experiment with connecting the ALF40 in reverse phase with respect to the RIUJX series speakers Often the reverse phase connection results in better integration and slightly higher sound pressure level through cross over region In scenarios 2 and 3 only a maximum of two ALF4Qs may be connected in parallel to a single amplifier output amplifier must be 4 ohm stable This will help provide the correct low frequency sound pressure levels in large rooms without needing additional amplifier channels Where there is more than one pair of AIUJX speakers in a room decide which of the above scenarios is applicable to the system and multiply the number e g 2 1 by the number of speaker pairs Example a large reception room requires four AIUJ3X speakers and the amplifier has provision for up to 6 independent amplifier channels Therefore this could be an Active 4 2 system 2 1x2 4 2 or a Passive 4 4 system 2 2x2 4 4 depending on how much bass output is required Specifications Dimensions Weight Design Power handling Nominal Impedance Frequency Response Sensitivity Maximum SPL 1m Port location Port diameter I D O D Connection ce A 358 x 159 x 134mm l4 2 x 5 3 x 6 3 3 03Kg 6 67 Ibs Ported acoustic bandpass with
3. USER GUIDE ALF40 Bass Enhancer V2 1 Mar 2010 TECHNOLOGIES Ltd Contents Using the adjustable port system Positioning the ALF40 ALF40 connection options Setup tips Specifications page 3 5 page 6 7 page 8 11 page 12 page 13 Using the Adjustable Port System The ALF40 features a unique port system which allows for great flexibility in positioning and concealing the product The port can be switched between two optional positions in the ALF40 s cabinet An aluminium plate port plate and rubber o ring provides an air tight seal around the port A similar plate is used to cover the unused port hole blanking plate LARNING BE CAREFUL NOT TO DROP ANY OBJECT INTO THE ALF40 ENCLOSURE THROUGH THE PORT HOLES 3 J Top Position MAX 80mm This port position can be useful if you need to stand the ALF40 on its end connection terminal facing upward End Position IMPORTANT NOTES e ALWAYS loosen the 4 screws in the port plate before adjusting the port e the blanking plate MUST always be screwed down over the port position that is not in use e be sure to tighten both the port plate and the blanking plate NEVER over tighten the screws e ensure that the RUBBER O RING is correctly in position around the plastic port and sitting in the circular rebate Positioning the ALF40 Free Standing The ALF40 can be positioned anywhere in the room A location near the corner of the roo
4. m will give the most bass output It is important to allow the bass port to breathe i e do not place any solid objects closer than 50mm 2 directly in front of the port You may place the ALF40 in any orientation that doesn t block the port Concealed Placement The ALF40 may be placed inside a cupboard or other piece of furniture behind wall panelling or even within a ceiling cavity Whatever structure you install the ALF4O inside it is important to create a suitable hole for the port to protrude through so that it may breathe into the listening room There are 3 brackets supplied with the ALF40 These may be used to secure the ALF40 to a structure Please use wood screws not longer than 12mm 1 2 to fix the brackets to the ALF40 cabinet In Ceiling The illustration below shows how the supplied brackets can be used to fix the ALF40 to a ceiling joist Notice the port protrudes from the cabinet this is to allow it to protrude through a suitable hole cut in the plasterboard ceiling layer A suitable lighting trim may be placed over the port opening to improve its appearance ALF40 Connection Options l Passive Stereo 2 1 RIUJ1X RIUJ3X pair ALF4O ALF40 z Passive 2 1 The output of an ALF40 in most situations will match a pair of AIUJIX or AIUJ3X speakers 2x ALF40 might be necessary to match a pair of AIW3X in a large room The ALF40 is designed to be connected in parallel with an AIUJX se
5. ries speaker the APU2 forms part of what is effectively a crossover between ALF40 and AIUJX In this scenario one of the amplifier channels Left or Right is used to drive the ALF40 and one of the AIUJX speakers together It is assumed that bass frequencies are normally mixed in mono however for orchestral music better performance will be obtained with the ALF40 connected to the Left channel of the amplifier J ______ _jj_jjtj j_ 2 Passive Stereo 2 2 AIUJSX pair 2x ALF4O ALF40 y Li ALF40 Passive 2 2 For systems using a pair of AIUJ5X speakers a pair of ALF40s will be necessary In this scenario both channels of the stereo amplifier drive an ALF40 in parallel connection with an AIUJ5X 3 Active Stereo 2 1 RIUJ1X RIUJ3X pair RLF40 ALF40 Multi channel Amplifier Active 2 1 By connecting a single ALF40 to its own amplifier channel its output relative to the AIUJIX AIUJ3X pair can be set optimally In larger rooms care should be taken not to adjust the relative output of the ALF40 so high that its mechanical limits are reached well before those of the accompanying AIUJX speakers consider using two ALF4Os if this is the case see Active 2 2 4 Active Stereo 2 2 RIUJ5X pair 2x RLF40 ALF40 Multi channel Amplifier CH 1 CH 2 CH 3 CH 4 R L R L Active 2 2 For systems using a pair of AIUJ5X speakers a pair of AL
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