Carvin 742 b owners manual

Page 1

INPUT For any distance over 25, use a balanced source. Use the balanced XLR or 1/4 connectors featured on the rear connect plate. You may DAISY-CHAIN as many speakers as you wish. All connectors are wired in parallel. 12dB PAD To start the initial hook up, be sure the 12dB pad switch is in the IN position. This will be the least sensitive position for your input source. If your signal is weak, depress the Pad switch to the OUT position, which will raise the level of your powered speaker. SOFT LIMITINGUnlike other limiters, the SPS™ incorporates an exclusive optoisolater limiter system, which does not add distortion when limiting. Soft limiting starts to occur when you approach the maximum output of your powered speaker allowing you to get more usable power out of your system without severe clipping. However, when you hear distortion, hard clipping or cutting out, reduce the overall level as you have exceeded the systems capacity. POWER/PROTECTWhen the system has been activated by the power switch, the LED will indicate GREEN. If the system should go into protect, the LED will indicate YELLOW which may occur if; a) one of the internal drivers short or b) if the power amp should require service. AC POWERThe 742P is available in either 120V or 240V models. Always use dedicated circuits for powered speakers. Every Carvin SPS™ powered speaker is designed to be left on continuously in the case of permanent installations. SPS™ 742P POWERED AMP SPECS Frequency Response:20 Hz to 20 kHz ±1 dB THD:less than .1% Power :300 watts @ 8Ω Duty Cycle :Continuous without power reduction circuits Sensitivity:.5VAC for full output, 12 dB pad Input/Through:XLR & 1/4" Balanced Input Impedance:10k Ω, (for 100 to 600 Ωinputs) Input Common Mode Rejection:72 dB @ 1k Hz Overload Protection:Ye s AC Power Muting:Ye s Power Supply:Toroid Design Power Amp Design:High Slew Rate Digital DDPA™ Power Amp Efficiency :91% AC Voltage, VA:120 or 240 VAC models, 400VA Idle VA:15VA AC Connection:3 prong connector (grounded) AC Power Cable:16 Ga (heavier for long runs) Wt:52 lbs. 742P SPS™ POWERED SPEAKER FEATURES Carvins SPS™ SMART POWERED SPEAKERS™ are more than just another power amp in a cabinet. They offer advanced electronics to perfectly control every speaker component. Woofers are power-managed through active filtering, allowing more low-end punch and preventing over excursion. The mid range has exceptional detail without harshness and the top-end remains crystal clear. The exclusive optoisolator limiter helps keep your peaks under control reducing distortion. Surprising transparency is delivered by pure, uncolored power from ultra- fast slew rate power amps. The heart of every Carvin SPS™ powered speaker is our exclusive Digital Powered Processing Amplifier (DPPA™), which is fundamentally, a very sophisticated delta-sigma V/A converter. The amplifier's THD is less than .1% from 20-20k Hz. The 742P SPS™ offers 300 watts direct to the drivers with no cable loss. SPS™ powered speakers have an incredible 91% efficiency allowing you to run more powered speakers from the same 15 or 20 amp AC circuit. They run cool because power is not wasted into the heat sink. This also means you can expect full output 24 hours continuously - not reduced as with other systems when they get hot. Of course, mute and protection circuits are standard to save your gear from any unfriendly stage conditions. The biggest advantage of Carvin powered speakers is rock-solid reliability and convenience while only adding 6 lbs over the weight of our standard enclosures! SMART POWERED SPEAKERS™ are easy to connect via a 1/4 or XLR balanced inputs. Daisy-chain as many powered speakers as you need for additional coverage. A 12 dB gain switch matches every audio source. A removable AC cord frees the enclosure when transporting. Read general information about the 742 enclosure for specs, warranty and precautions on the other side. REAR POWERED CONNECT PLATE 742P PRO SOUND REINFORCEMENT MADE IN THE USA POWER 300 Watts CAUTIONRISK OF ELECTRIC SHOCK DO NOT OPEN CAUTION - TO PREVENT ELECTRICAL SHOCK DO NOT DEFEAT THE SAFETY GROUND ON THE POWER CORD - DO NOT REMOVE COVER . WARNING - TO PREVENT FIRE OR SHOCK HAZARD DO NOT EXPOSE TO RAIN OR MOISTURE. REFER SERVICING TO QUALIFED PERSONNEL. Serial No. AC power connector Power Switch Status LED GREEN-Normal YELLOW-Protect Use any of the 3 connectors from your audio source. Daisy-chain to other systems. All connectors are balanced. 12dB PAD switch to reduce the level Serial Number 742P POWERED SPEAKER INSTRUCTIONS