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Crate Amplifiers SPA-1400 manual

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Table of contents for the manual

  • Page 1

    User ’ s Guide for the CRA TE PRO AUDIO SP A-1400/1400C Rack Mount Power Amplifier In order to achieve maximum performance from your new Crate Pro Audio SP A Series Power Amp we recommend that you read this user ’ s guide prior to its use.[...]

  • Page 2

    2 Contents: Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3 Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3 Front Panel Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4 Rear Panel Information . . . . . . . . . . . . . . . . . . . . . . . . . . . [...]

  • Page 3

    3 Introduction: Congratulations. Y ou have selected one of the finest pieces of sound reinfor cement equipment available, the Crate Pro Audio SP A-1400/1400C Rack Mounted Amplifier . Our many years of experience in high-performance audio equip- ment, combined with our extensive research and development procedures, have enabled us to produce an ampl[...]

  • Page 4

    4 Front Panel Information: 1 4 3 2 2 3 4 5 6 7 1: COOLING F AN EXHAUST VENT : The SP A-1400/1400C employs a pair of variable-speed internal cooling fans to draw air through the unit and keep it running cool even under extreme operating conditions. The air is drawn in through the unit’ s side and rear intake vents and is forced out through the fro[...]

  • Page 5

    5[...]

  • Page 6

    SP A-1400/1400C Rack Mount Power Amplifier ( SP A-1400C ONL Y ) 18 19 20 21 22 23 21 19 18 20 24 18: BALANCED THRU/X-OVER OUT JACKS: These male XLR jacks are independently switchable and have two uses: (1) Balanced Thru: For driving additional amplifiers with the same input signal, set the X-OVER OUT/THRU switch (#19) to the THRU position (switch o[...]

  • Page 7

    7 SP A-1400/1400C Rack Mount Power Amplifier Speakon ® is a registered trademark of Neutrik USA Speaker Impedances And Power Ratings: When connecting speaker cabinets, you must observe proper load impedances. Whenever connecting multiple cabinets to an amplifier , the total load impedance must be calculated to insure proper performance from the am[...]

  • Page 8

    8 Installation and Operation: Stereo Operation : The SP A-1400/1400Ccan be used in the Stereo Mode as two separate power amplifiers, each capable of driving loads down to 2 ohms. Each channel operates independently and has its own input connectors, sensitivity level controls, signal indicator LEDS, automatic limiter , fault protection circuitry , p[...]

  • Page 9

    9 SP A-1400/1400C Rack Mount Power Amplifier Speakon ® is a registered trademark of Neutrik USA Installation and Operation: Main/Monitor Combinations: Another application of the Stereo Mode (see page 8) is using one channel of the amplifier for the house speakers and the other for the monitors. The MONO/STEREO SWITCHES (#16 & #17) must both be[...]

  • Page 10

    10 SP A-1400/1400C Rack Mount Power Amplifier Speakon ® is a registered trademark of Neutrik USA Installation and Operation: Parallel Mono Operation: The two internal power amplifiers (channel 1 and 2) can easily be driven by a single input signal. Connect the input sig- nal to channel 1 and press in the P ARALLEL MONO SWITCH (#16). (The BRIDGE MO[...]

  • Page 11

    11 SP A-1400/1400C Rack Mount Power Amplifier Speakon ® is a registered trademark of Neutrik USA Installation and Operation: Bridged Mono Operation: The two internal power amplifiers can be bridged together to form a single, higher -powered amp. In the Bridged Mono Mode, the amplifier uses channel 1's INPUT jacks and LEVEL CONTROL ; channel 2[...]

  • Page 12

    12 SP A-1400/1400C Rack Mount Power Amplifier Speakon ® is a registered trademark of Neutrik USA Installation and Operation: Patching T wo Bridged Mono Mode Systems: T wo Bridged Mono amplifiers can be patched together by connecting a signal cable between their input jacks (the dashed line in the illustration below). (On the SP A-1400C, another op[...]

  • Page 13

    13 SP A-1400/1400C Rack Mount Power Amplifier Speakon ® is a registered trademark of Neutrik USA Installation and Operation: Connecting Multiple Amplifiers (SP A-1400C only): A single signal may be passed along to multiple amplifiers by using the BALANCED THRU/X-OVER OUT jacks. Set the switch- es to the “Thru” (OUT) position and connect from t[...]

  • Page 14

    14 SP A-1400/1400C Rack Mount Power Amplifier Speakon ® is a registered trademark of Neutrik USA Installation and Operation: Biamping: SP A-1400 – One Amp, Single Cabinet: One SP A-1400 can be used to separately power the lows and highs of a cabinet with biamp inputs. The MONO/STEREO SWITCHES (#16 & #17) must both be in the OUT position. (W [...]

  • Page 15

    15 SP A-1400/1400C Rack Mount Power Amplifier Speakon ® is a registered trademark of Neutrik USA Installation and Operation: Biamping: SP A-1400 – One Amp, Separate Cabinets: One SP A-1400 can be used to power separate low and high frequency cabinets. The MONO/STEREO SWITCHES (#16 & #17) must both be in the OUT position. (W e show use of cha[...]

  • Page 16

    16 SP A-1400/1400C Rack Mount Power Amplifier Speakon ® is a registered trademark of Neutrik USA Installation and Operation: Biamping: SP A-1400C – One Stereo Amplifier: A single SP A-1400C can be used to power separate low and high frequency cabinets (shown below), or to separately power the lows and highs of a cabinet with biamp inputs (for sp[...]

  • Page 17

    17 SP A-1400/1400C Rack Mount Power Amplifier Speakon ® is a registered trademark of Neutrik USA Installation and Operation: Biamping: SP A-1400C – Multiple Amplifiers: A single SP A-1400C can be used to power separate low and high frequency cabinets (shown below), and to connect addi- tional biamped speakers, using multiple amplifiers. The MONO[...]

  • Page 18

    18 SP A-1400/1400C Rack Mount Power Amplifier Speakon ® is a registered trademark of Neutrik USA Installation and Operation: Biamping: SP A-1400C – T wo Mono Bridged Amplifiers : A pair of SP A-1400C can be used to power separate low and high frequency cabinets. The BRIDGE MONO SWITCH (#17) of each amplifier must both be in the IN position. Use [...]

  • Page 19

    19 SP A-1400/1400C Rack Mount Power Amplifier Speakon ® is a registered trademark of Neutrik USA Installation and Operation: T riamping: SP A-1400: A pair of SP A-1400s can be used to power separate low , mid and high frequency cabinets, or a separate subwoofer and biamped full range cabinet. In the example shown below , with a mono bridged subwoo[...]

  • Page 20

    20 SP A-1400/1400C Rack Mount Power Amplifier Speakon ® is a registered trademark of Neutrik USA Installation and Operation: T riamping: SP A-1400C: A pair of SP A-1400Cs can be used to power separate low , mid and high frequency cabinets, or a separate subwoofer and biamped full range cabinet. In the example shown, a bridged mono subwoofer , the [...]

  • Page 21

    21 SP A-1400/1400C Rack Mount Power Amplifier Speakon ® is a registered trademark of Neutrik USA System Block Diagram, SP A-1400: System Block Diagram, SP A-1400C: RED (+) BLK ( – ) CH 2 INPUTS RING TIP 2 3 + 1 LIMITER CONTROL PROTECT LIMIT SIGNAL SIGNAL LIMIT PROTECT CH 2 LEVEL CH 2 AMP PARALLEL MONO BRIDGE MONO MONO ST MONO ST CH 1 INPUTS RING[...]

  • Page 22

    22 Mode Block Diagrams: The following diagrams are excerpts from the system block diagrams and are intended to provide a simplified view of the three operating modes of the amplifier . For more complete information please refer to the text on page 5 (items #16 & 17), and the text and/or illustrations on pages 8 – 21. Stereo Mode: SP A-1400/14[...]

  • Page 23

    23 SP A-1400/1400C Rack Mount Power Amplifier Installation Notes / Mounting Dimensions: The SP A-1400/1400C is specifically designed to be rack mounted, either as a permanent fixture or in a “mobile” rack case. As with any large, heavy object, a proper installation could mean the difference between success and disaster . The front of the unit i[...]

  • Page 24

    www .crateamps.com © 1999 SLM Electronics, Inc. • A Division of St. Louis Music, Inc. 1400 Ferguson Avenue • St. Louis, MO 63133 47-658-01 • 01/99 SP A-1400/1400C Rack Mount Power Amplifier T echnical Specifications POWER OUTPUT Stereo Mode: 260 watts / channel @ 8 ohms 20Hz–20kHz 425 watts / channel @ 4 ohms 20Hz–20kHz 660 watts / chann[...]