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Crown k series Reference Manual

Balanced current amplifier
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K-Series
© 1999 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
™
are trademarks and Crown
registered trademark of Crown International, Inc. Other
trademarks are the property of their respective owners.
Watch for these symbols:
Lightning Bolt Symbol:
This symbol is used to alert the
user to the presence of danger-
ous voltages and the possible
risk of electric shock.
Exclamation Mark Symbol:
This symbol is used to alert the
user to make special note of im-
portant operating or mainte-
nance instructions found in the
reference manual.
®
is a
102010-4
9/99

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  • Page 1 K-Series © 1999 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 ™ are trademarks and Crown ® is a registered trademark of Crown International, Inc. Other trademarks are the property of their respective owners.

  • Page 2: Friendly Page Of Tips And Warnings

    K-Series Balanced Current Amplifier™ K-Series Balanced Current Amplifier™ Friendly Page of Tips and Warnings Protect the power cord attached to your K-Series am- plifier. Route it to avoid foot traffic or other situations where the cord might be stretched or pinched. Pay spe- cial attention to the cord connector and attachment points.

  • Page 3: Table Of Contents

    K-Series Balanced Current Amplifier™ K-Series Balanced Current Amplifier™ Important Safety Instructions Contents Friendly Page of Tips and Warnings ...... 2 1) Read these instructions. Important Safety Instructions ......... 4 2) Keep these instructions. Unpacking Your K-Series Amplifier ......6 Quick Start ............7 3) Heed all warnings.

  • Page 4: Quick Start

    Only you can initiate First things first. We know you just a claim for shipping damage. Crown will be happy to help as can’t wait to crank up your new needed. Save the shipping carton as evidence of damage for Crown ®...

  • Page 5: 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 responsi-...

  • Page 6: Welcome

    1 Welcome The K-Series amplifiers are also highly energy-efficient—some Thank you for choosing Crown! Mick and his team of enthusi- astic engineers have worked long hours to craft a totally new of the World’s first “green” amps. As a result, the K-Series kind of amplifier—the K-Series.

  • Page 8: Very Detailed Install

    K-Series Balanced Current Amplifier™ K-Series Balanced Current Amplifier™ Set the mono mode switches. Both the Bridge Output 2 Very Detailed Install and “Y” input switches should be in the OFF position when you’re running in Stereo Mode (see Figure 2.2). Ste- Follow these instructions for a detailed explanation of K-Series reo Mode allows independent inputs on the right and left installation procedures and options.
  • Page 9 K-Series Balanced Current Amplifier™ K-Series Balanced Current Amplifier™ Connect the inputs of the K-Series amp to your mixer, If you are running with both the Y-Input and Bridge Output preamplifier, or other equipment ahead of the amp. Two switches “ON”, you may choose to make use of the un- types of balanced input connectors are provided, allow- used input connectors as low-voltage daisy-chain out- ing you to choose either 1/4-inch phone or 3-pin XLR con-...

  • Page 10: Bridge Mono Output Wiring

    K-Series Balanced Current Amplifier™ K-Series Balanced Current Amplifier™ If the Bridge Output switch is turned ON, connect a mono Fig. 2.7 load across the red binding posts of each channel as Stereo Hookup— two stacks, one shown in Figure 2.6. Do NOT use the black binding amp, stereo in, posts when the Bridge Output switch is turned on.

  • Page 11: Y" Mono Input / Bridged Output

    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 12 K-Series Balanced Current Amplifier™ 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.
  • Page 13 K2 - Full Power into 8 Ohms K-1 amplifiers. Sensitivity Power at 8 ohms Gain IMPORTANT: Contact a Crown Service Center or our 1.4 V (+5.21 dBu) 500 W 32.88 dB Technical Support Group for information on changing fuses. 3.09 V (+12 dBu)

  • Page 14: Other Issues

    K-Series Balanced Current Amplifier™ K-Series Balanced Current Amplifier™ 4 Other Issues If you can’t, or don’t want to change the preceding conditions, two possible alternatives are available to add the necessary air movement. First, you can add fans to direct air onto any Ya Gotta Know When to Kool It! surface of the amplifier.

  • Page 15: Balanced Input Wiring

    K-Series Balanced Current Amplifier™ K-Series Balanced Current Amplifier™ 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. These balanced legs exhibit identical imped- Hum and Buzz Tips ance characteristics with respect to ground, and may also carry the audio signal at the same level, but with opposite po-...
  • Page 16 K-Series Balanced Current Amplifier™ 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 17 K-Series Balanced Current Amplifier™ K-Series Balanced Current Amplifier™ Bridge Output: An on/off switch located on the back panel Input Impedance: Nominally 20 k ohms, balanced. Nominally between the input connectors which, when turned on, bridges 10 k ohms, unbalanced. the two output channels for twice the output voltage..WATCH- Input Sensitivity: 1.4 volts for standard 1-kHz power, or 26 dB OUT SPEAKERS!! gain.

  • Page 18: Awesome Frequency (Amplitude) Response

    K-Series Balanced Current Amplifier™ K-Series Balanced Current Amplifier™ Construction Beautiful cast-aluminum front panel from hand-crafted mold. Lovingly coated with the most durable powder coat. Front Test of K2 Amp, panel labels are painstakingly printed in color on Lexan for Serial Number 106390!! durability and fingerprint resistance (fully chocolate proof).
  • Page 19 You may choose either. It is important that you have your plicates! copy of the bill of sale as your proof of purchase. If you have any questions, please call or write the Crown Tech- Service at a North American Service Center nical Support Group.

  • Page 20: North America

    No person has the authority to enlarge, amend, or modify this Crown Warranty. This Crown Warranty is not extended by the length of time which you are deprived of the use Crown Warranty is not extended by the length of time which you are deprived of the use of the new Crown product.
  • Page 21 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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