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K K K K K -Series
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FCC COMPLIANCE NOTICE

This equipment has been tested and found to com-
ply with the limits for a Class A digital Device, pursu-
ant to Part 15 of the FCC Rules. These limits are
designed to provide reasonable protection against
harmful interference when the equipment is operated
in a commercial environment. This equipment gener-
ates, uses and can radiate radio frequency energy
and, if not installed and used in accordance with the
instruction manual, may cause harmful interference
to radio communications. Operation of this equip-
ment in a residential area is likely to cause harmful
interference in which case the user will be required to
correct the interference at his own expense.
"The user is cautioned that any changes or modifica-
tions not expressly approved by Crown International
could void the user's authority to operate the equip-
ment."
© 1997 by Crown International, Inc., P.O. Box 1000,
Elkhart, IN 46515-1000 U.S.A. Telephone: 219-294-8000.
Fax: 219-294-8329. Trademark Notice: Balanced Current
Amplifier
, and BCA
registered trademark of Crown International, Inc. Other
trademarks are the property of their respective owners.
are trademarks and Crown
®
is a
102010-1
4/97

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Summary of Contents for Crown K Series

  • Page 1: Fcc Compliance Notice

    “The user is cautioned that any changes or modifica- tions not expressly approved by Crown International could void the user’s authority to operate the equip- ment.” © 1997 by Crown International, Inc., P.O. Box 1000, Elkhart, IN 46515-1000 U.S.A. Telephone: 219-294-8000. Fax: 219-294-8329. Trademark Notice: Balanced Current ™...
  • Page 2: Friendly Page Of Tips And Warnings

    K-Series Balanced Current Amplifier™ Friendly Page of Tips and Warnings Page 2...
  • Page 3 K-Series Balanced Current Amplifier™ Page 3...
  • Page 4: Unpacking Your K-Series Amplifier

    If damage is found, notify the transportation company immediately. Only you can initiate a claim for shipping damage. Crown will be happy to help as needed. Save the shipping carton as evidence of damage for the shipper’s inspection.
  • Page 5: Features

    K-Series Balanced Current Amplifier™ K-Series Features List: Page 5...
  • Page 6: Quick Start

    K-Series Balanced Current Amplifier™ Quick Start! First things first. We know you just can’t wait to crank up your new Crown ® K-Series ampli- fier. And the last thing you want to do is dig through pages of tech-talk to find out where the “ON”...
  • Page 7: Typical Stereo Hookup

    (Now comes the fun!) Supply input, adjust amp levels and enjoy. CAUTION: Excessive output levels may toast your speakers. Crown’s K -Series amplifier has such low distortion, you may not realize the actual level being reached until it’s too late. Please exercise caution and drive your speakers responsibly,...
  • Page 8 K-Series Balanced Current Amplifier™ Page 8...
  • Page 9: Table Of Contents

    K-Series Balanced Current Amplifier™ Contents Friendly Page of Tips and Warnings ..... 2 Unpacking Your K-Series Amplifier ....... 4 Features ..............5 Quick Start ............6 Welcome ............10 Very Detailed Install ..........14 Operation ............21 Other Issues ............25 Specifications .............
  • Page 10: Welcome

    B A L A N C E D C U R R E N T A M P L I F I E R 1 Welcome Thank you for choosing Crown! Mick and his team of enthusi- astic engineers have worked long hours to craft a totally new kind of amplifier—the K-Series.
  • Page 11 K-Series Balanced Current Amplifier™ Clip Clip Enable Enable Signal Signal 0 dB 0 dB 0 dB 0 dB Fig. 1.1 The K-2 Amplifier (K-1 Amplifier appears the same except for nameplate) The K-Series amplifiers are also highly energy-efficient—some of the World’s first “green” amps. As a result, the K-Series amps use less electricity (reducing your utility bills) and save the precious resources of our environment.
  • Page 12: The Big Picture: Controls, Indicators And

    K-Series Balanced Current Amplifier™ Fig. 1.2 The Big Picture: Controls, Indicators & Connectors Removable The Company that invented Hand-crafted Cast Balanced Current Amplifiers Rack Handle Aluminum Front Panel B A L A N C E D C U R R E N T A M P L I F I E R B A L A N C E D C U R R E N T A M P L I F I E R B A L A N C E D C U R R E N T A M P L I F I E R Way Cool...
  • Page 13: Power Switch

    K-Series Balanced Current Amplifier™ Ch-1 Level Ch-2 Level Power Switch Control Control Clip Clip Enable Enable Signal Signal 0 dB 0 dB 0 dB 0 dB TLC, Clip, IOC Enable & Signal Indicators Indicator Power Cable WARNING: FUSE TO REDUCE THE RISK OF FIRE OUTPUT WIRING OR ELECTRIC SHOCK, DO NOT EXPOSE 20 A @ 100-120 VAC...
  • Page 14: Very Detailed Install

    K-Series Balanced Current Amplifier™ 2 Very Detailed Install Follow these instructions for a detailed explanation of K-Se- ries installation procedures and options. If you just want to get up and running as quickly as possible, see the Quick Start section on page 6. Begin with the amplifier turned off and disconnected from the power receptacle.
  • Page 15: Mono Mode Switches

    K-Series Balanced Current Amplifier™ Set the mono mode switches. Both the Bridge Output and “Y” input switches should be in the OFF position when you’re running in Stereo Mode. Stereo Mode allows independent inputs on the right and left channels to feed separate speakers at the output.
  • Page 16: Typical Input Wiring

    K-Series Balanced Current Amplifier™ Connect the inputs of the K-Series amp to your mixer, preamplifier, or other equipment ahead of the amp. Two types of balanced input connectors are provided, allow- ing you to choose either 1/4-inch phone or 3-pin XLR con- nectors.
  • Page 17: Stereo Output Wiring

    K-Series Balanced Current Amplifier™ If you are running with both the Y-Input and Bridge Output switches "ON", you may choose to make use of the un- used input connectors as daisy-chain outputs—perhaps to other amplifiers in your system. For instance, if you’re running in “Y”...
  • Page 18: Bridge Mono Output Wiring

    K-Series Balanced Current Amplifier™ If the Bridge Output switch is turned ON, connect a mono load across the red binding posts of each channel as shown in Figure 2.6. Do NOT use the black binding posts when the Bridge Output switch is turned on. OUTPUTS CH-2 CH-1...
  • Page 19: Stereo Hookup

    K-Series Balanced Current Amplifier™ INPUT BRIDGE INPUT Fig. 2.7 "Y" INPUT SENSITIVITY OUTPUT SENSITIVITY Stereo Hookup— 1.4 V 26 dB 1.4 V 26 dB two stacks, one amp, stereo in, BALANCED INPUT WIRING THIS DEVICE COMPLIES WITH PART 15 OF THE FCC RULES. CAUTION: TO PREVENT ELECTRIC SHOCK DO NOT FUSE...
  • Page 20: Y" Mono Input Hookup

    K-Series Balanced Current Amplifier™ Fig. 2.9 INPUT BRIDGE INPUT "Y" INPUT OUTPUT SENSITIVITY SENSITIVITY "Y" Mono Input 1.4 V 26 dB 1.4 V 26 dB Hookup—Great for when you want BALANCED INPUT WIRING THIS DEVICE COMPLIES WITH PART 15 OF THE FCC RULES. CAUTION: TO PREVENT ELECTRIC SHOCK DO NOT FUSE...
  • Page 21: Operation

    Clip: The orange Clip indicators turn on when distortion of any type becomes audible in the amplifier output. For the first time in its 50 year history, Crown has added clip lights to an amplifier. We had resisted this feature in the past because our IOC system was more sensitive than clip indica- tors.
  • Page 22 K-Series Balanced Current Amplifier™ IOC: The yellow Input/Output Comparator indicators are super-sensitive distortion indicators that turn on long before ⁄ distortion is audible (approximately the level that would 30th trigger one of the Clip indicators). This circuit compares the actual waveforms of the input and output. It immediately alerts you of any distortion that exceeds 0.05% to provide dynamic proof of distortion-free performance.
  • Page 23: Back Panel Controls

    K-Series Balanced Current Amplifier™ CAUTION: BALANCED INPUT WIRING THIS DEVICE COMPLIES WITH PART 15 OF THE FCC RULES. TO PREVENT ELECTRIC SHOCK DO NOT OPERATION IS SUBJECT TO THE FOLLOWING CONDITIONS: BOTTOM COVER. NO USER SERVICEABALE PARTS REFER SERVICING TO QUALIFIED SERVICE PERSO 1) THIS DEVICE MAY NOT CAUSE HARMFUL INTERFERENCE.
  • Page 24: Back Panel Fuse Location

    K-Series Balanced Current Amplifier™ WARNING: FUSE TO REDUCE THE RISK OF FIRE OUTPUT WIRING OR ELECTRIC SHOCK, DO NOT EXPOSE 20 A @ 100-120 VAC STEREO BRIDGE-MONO THIS EQUIPMENT TO RAIN OR MOISTURE. 10 A @ 200-240 VAC OUTPUTS CH-2 CH-1 Fig.
  • Page 25: Other Issues

    5. Reconnect the amplifier to the AC receptacle and turn the amplifier back on. 6. Readjust the level controls. IMPORTANT: Contact a Crown Service Center or our Technical Support Group if 4 Other Issues the amplifier continues to blow fuses.
  • Page 26: Balanced & Unbalanced Input Wiring

    K-Series Balanced Current Amplifier™ tors illuminate and no steps are taken to reduce the input signal or attempts made to improve air circulation. The amplifier will not shut down, you’ll still be rockin’ with plenty of distortion-free decibility! Balancing the Line A balanced audio circuit typically will have both positive (+) and negative (–) legs of the circuit that are isolated from the ground circuit.
  • Page 27: Balanced Input Wiring

    K-Series Balanced Current Amplifier™ Hum and Buzz Tips 1. It is imperative that all of your electrical equipment share the same power ground reference. 2. Unless you are interfacing to a microphone, the shield of the cable should only be connected at one end. (See Fig. 4.2.) 3.
  • Page 28: Unbalanced Input Wiring

    K-Series Balanced Current Amplifier™ – INPUT Shield connected Floating to ground terminal source Output 2-wire line cord – (or battery power) INPUT Shield is not Grounded connected source at this end Output 3-wire grounded line cord (or other ground connection) –...
  • Page 29: Specifications

    K-Series Balanced Current Amplifier™ 5 Specifications Note: All specifications relate to both the K1 and K2 amplifiers in both 50- and 60-Hz versions, unless noted otherwise. Performance...Just How Good Is It? Frequency Response: ±0.25 dB from 20 Hz to 20 kHz. The frequency response is band limited with an 8-Hz double- integrated 3rd-order Butterworth high-pass filter and a 30-kHz 7th-order Gaussian low-pass filter.
  • Page 30 K-Series Balanced Current Amplifier™ “Y” Input: An on/off switch located on the back panel between the input connectors which, when turned on, parallels the two input channels. Indicators TLC: A TLC (thermal level control) LED for each channel which turns on with a dim glow shortly before the amplifier needs help dissipating heat.
  • Page 31: Output Signal

    K-Series Balanced Current Amplifier™ Output Connectors: Two sets of color-coded binding posts for banana plugs, spade lugs or bare wire (European models are fruit-phobic and do not accept banana plugs). DC Output Offset: ±10 millivolts. Output Signal Stereo: Unbalanced, two-channel. Bridge-Mono: Balanced, single-channel.
  • Page 32 K-Series Balanced Current Amplifier™ Construction Beautiful cast-aluminum front panel from hand-crafted mold. Lovingly coated with the most durable powder coat. Front panel labels are painstakingly printed in color on Lexan for durability and fingerprint resistance (fully chocolate proof). Aluminum chassis with durable black finish. Cooling: High-performance passive convection cooling sys- tem allows the amplifier to drive 2-ohm loads to high music sound levels (6 dB into clip) in a 40°...
  • Page 33: Awesome Frequency (Amplitude) Response

    K-Series Balanced Current Amplifier™ -10.0 -20.0 10 K 100 K FREQUENCY (Hz) Fig. 5.1 Awesome Frequency (Amplitude) Response 100,000 10,000 DAMPING MA-2400 1,000 Brand X 001 1000 FREQUENCY (Hz) Fig. 5.2 Superior Damping Factor Provides Best Bass Control in the Industry! Page 33...
  • Page 34: Service

    To obtain factory service, fill out the service information page that follows and send it along with your proof of purchase and the defective unit to the Crown factory. For warranty service, we will pay for ground shipping both ways in the United States after receiving copies of the shipping receipts.
  • Page 35 Do not send this in- struction manual, if we forget what we said, we have du- plicates! If you have any questions, please call or write the Crown Tech- nical Support Group. Crown Audio Division Technical Support / Factory Service Plant 2 SW, 1718 W.
  • Page 36 THREE YEAR FULL WARRANTY...
  • Page 37 ITEMS EXCLUDED FROM THIS CROWN WARRANTY This Crown Warranty is in effect only for failure of a new Crown product which occurred within the Warranty Period. It does not cover any product which has been damaged because of any intentional misuse, accident, negligence, or loss which is covered under any of your insurance contracts.
  • Page 39 Crown Factory Service Information Shipping Address: Crown International, Inc., Factory Service, Plant 2 SW, 1718 W. Mishawaka Rd., Elkhart, IN U.S.A. 46517 Phone: 1-800-342-6939 or 1-219-294-8200 Fax: 1-219-294-8124 Owner’s Name: __________________________________________________________ Shipping Address: _______________________________________________________ Phone Number: ________________________ Fax Number: ____________________...

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