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Alesis Matica 900 manual

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Table of contents for the manual

  • Page 1

    A L ES I S Matica 500/900 Reference M a nu a l[...]

  • Page 2

    Contents Matica 500/900 Reference Manual 1 C ONTENTS 1: Introduction ............................................................................. 3 About Alesis Maticaª Amplifiers .........................................................................3 Why Another Power Amplifier? ................................................................[...]

  • Page 3

    2 Matica 500/900 Reference Manual[...]

  • Page 4

    Introduction Matica 500/900 Reference Manual 3 C HAPTER 1 I NTRODUCTION AC BRKR POWER CHANNEL A CLIP CHANNEL B CLIP 0 1 2 3 4 6 7 8 9 10 0 5 0 1 2 3 4 6 7 8 9 10 0 5 Figure 1: Amplifier front panel controls. About Alesis Maticaª Amplifiers Thank you for purchasing an Alesis Matica power amplifier, one of the most advanced and highest value amplifi[...]

  • Page 5

    Introduction 4 Matica 500/900 Reference Manual clipping, not just a designated output voltage which may not correspond to the clipping point if power line voltage is low. The rear panel inputs can be via gold plated 1/4" (6.3 mm) phone jacks, gold plated 3 pin XLR-type connectors or barrier screw terminals, all of which are standard equipment.[...]

  • Page 6

    Introduction Matica 500/900 Reference Manual 5 of recent developments in electronic componentry, and innovative design concepts make the Alesis power amplifiers ideal for any professional application.[...]

  • Page 7

    Installations 6 Matica 500/900 Reference Manual C HAPTER 2 I NSTALLATIONS Unpacking and Inspection Carefully unpack the amplifier and inspect it for physical damage originating in shipping. Do not discard the packing materials; they may be helpful in shipping the amplifier when it is not mounted in a rack or other enclosure. If damage is discovered[...]

  • Page 8

    Installations Matica 500/900 Reference Manual 7 Electrical Installation One of the most important considerations for proper installation and operation of a power amplifier is the capacity of the line feeding the mains voltage to the amplifier. If the line does not have sufficient current capacity, the amplifier may not be able to deliver its full r[...]

  • Page 9

    Installations 8 Matica 500/900 Reference Manual Audio Installation: Input Wiring SHOCK HAZARD – DO NOT OPEN RISQUE DE CHOC ELECTRIQUE – NE PAS OUVRIR TO PREVENT ELECTRICAL SHOCK DO NOT REMOVE COVERS. NO USER SERVICEABLE PARTS INSIDE. REFER SERVICING TO QUALIFIED SERVICE PERSONNEL. TO REDUCE THE RISK OF FIRE OR ELECTRICAL SHOCK DO NOT EXPOSE THI[...]

  • Page 10

    Installations Matica 500/900 Reference Manual 9 Figure 5. Balanced wiring of a 1/4Ó (6.3 mm) three-wire phone plug. Figure 6. Unbalanced wiring of a 1/4Ó (6.3 mm) three-wire phone plug All input wiring should be done with shielded cable. To use an unbalanced source with an Alesis amplifier, connect the High (+) signal wire as shown in Table 1 and[...]

  • Page 11

    Installations 10 Matica 500/900 Reference Manual multiple loudspeakers or systems to any amplifier, care should be taken that the actual load impedance does not drop below the amplifierÕs rated output load. Alesis amplifiers will not be damaged by excessively low output load impedances, but they will not be able to provide full output power and th[...]

  • Page 12

    Installations Matica 500/900 Reference Manual 11 Banana plugs are inserted in the ends of the plastic insulating nuts on each output terminal. The terminals are spaced to accept standard 3/4Ó (19 mm) spaced dual banana plugs. Alternately, the insulating nuts may be loosened so that stranded or solid wire may be attached. The threaded posts under t[...]

  • Page 13

    Installations 12 Matica 500/900 Reference Manual What we're doing here is compensation for the fact the Matica's B Channel is normally internally inverted and then re-inverted at its output. This improves the amplifier's ability to respond to high power low frequency signals better than conventional amplifiers. The input and output w[...]

  • Page 14

    Installations Matica 500/900 Reference Manual 13[...]

  • Page 15

    Installations 14 Matica 500/900 Reference Manual C HAPTER 3 A MPLIFIER O PERATIONS Once all gain adjustments are made and proper operation is confirmed, no special considerations are required for Matica amplifiers. Aside from the front panel gain controls, there are no user adjustments or routine maintenance operations necessary (or available). Whe[...]

  • Page 16

    Installations Matica 500/900 Reference Manual 15[...]

  • Page 17

    In Case of Trouble 16 Matica 500/900 Reference Manual C HAPTER 4 I N C ASE O F T ROUBLE No Sound ¥Is the power switch on? If not, turn it on. ¥Is the power light on? If not, confirm that the amplifier is plugged into a live AC mains circuit of appropriate voltage and current capacity. ¥Check the circuit breaker and reset it if it is open. If the[...]

  • Page 18

    In Case Of Trouble Matica 500/900 Reference Manual 17 Hum and/or Noise ¥Is the signal source working correctly? ¥Are the systemÕs electrical and audio ground connections proper? ¥Are there any noise-producing sources on the AC mains circuit, such as light dimmers, motors, etc.? If so, it may be necessary to run a separate power line for the aud[...]

  • Page 19

    In Case of Trouble 18 Matica 500/900 Reference Manual C HAPTER 5 R EFERENCE Preliminary Amplifier Specifications Power Output* 8 W 2 Channel 4 W 2 Channel 2 W 2 Channel 8 W Bridged 4 W Bridged Matica 500 162 W 250 W 350 W 500 W 650 W Matica 900 270 W 450 W 680 W 900 W 1350 W *Typical, 1% THD @ 1 kHz; two-channel ratings are for each channel, with b[...]

  • Page 20

    In Case Of Trouble Matica 500/900 Reference Manual 19 Rear Panel: Balanced gold plated 1/4Ó (6.3 mm)/latching XLR-type input connectors, slotted/Phillips screw terminal barrier input connector, heavy gauge 5-way binding post output connectors, recessed stereo/bridged mono slide switch, DB-25 aLinkª accessory connector and mounting holes for acces[...]