Crown DriveCore I-Tech 4x3500 HD Operation Manual
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Crown DriveCore I-Tech 4x3500 HD Operation Manual

Drivecore series
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Operation Manual

I-Tech 4x3500 HD DriveCoreSeries
Obtaining Other Language Versions: To obtain information in another language about the use of this product, please contact your
local Crown Distributor. If you need assistance locating your local distributor, please contact Crown at 574-294-8000.
This manual does not include all of the details of design, production, or variations of the equipment. Nor does it cover every possible
situation which may arise during installation, operation or maintenance.
The information provided in this manual was deemed accurate as of the publication date. However, updates to this information may have
occurred. To obtain the latest version of this manual, please visit the Crown website at www.crownaudio.com.
Trademark Notice: Crown, Crown Audio, IQ, BCA, and Amcron are registered trademarks of Crown International. HiQnet is a trademark
of Harman International Industries, Inc. Other trademarks are the property of their respective owners.
Some models may be exported under the name Amcron.
©2012 by Harman International, 1718 W. Mishawaka Rd., Elkhart, Indiana 46517-9439 U.S.A. Telephone: 574-294-8000
I-T 4x3500 HD
®
5006082-1
9/11

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Summary of Contents for Crown DriveCore I-Tech 4x3500 HD

  • Page 1: Operation Manual

    To obtain the latest version of this manual, please visit the Crown website at www.crownaudio.com. Trademark Notice: Crown, Crown Audio, IQ, BCA, and Amcron are registered trademarks of Crown International. HiQnet is a trademark of Harman International Industries, Inc. Other trademarks are the property of their respective owners.

  • Page 2: Important Safety Instructions

    I-Tech HD DriveCore Series Power Amplifiers Important Safety Instructions Wichtige Sicherheitsinstruktionen The I-Tech Series amplifiers are certified only at 120V in Canada. Importantes Instructions de Sécurité Instrucciones de Seguridad Importantes iMPORTANT I-Tech Series amplifiers require Class 2 output wiring. Les amplificateurs de série de I-Tech exigent des câbles de sortie de 1.

  • Page 3: Declaration Of Conformity

    I-Tech HD DriveCore Series Power Amplifiers DECLARATION of CONFORMITY Harman International Sue Whitfield FOR COMPLIANCE QUESTIONS ONLY: ISSUED BY: Harman International sue.whitfield@harman.com 1718 W. Mishawaka Road Elkhart, Indiana 46517 U.S.A. Representative’s Name and Address: David Budge 10 Harvest Close Yateley, gU46 6YS United Kingdom equipment Type: Commercial Audio Power Amplifiers Family Name: I-Tech HD...

  • Page 4: Table Of Contents

    I-Tech HD DriveCore Series Power Amplifiers Table of Contents Important Safety Instructions ............2 14.8 LevelMAX Tranducer Thermal Limiters ........57 7.3 Presets ................... 27 Declaration of Conformity ..............3 7.4 List of Pop-Up and Descriptions ..........28 14.9 Thermal Voltage (VRMS) ............57 Table of Contents ................4 7.5 Digital Audio Options (AES3 and VDrive) ........

  • Page 5: Welcome

    I-Tech HD DriveCore Series Power Amplifiers 1 Welcome The Crown I-Tech HD DriveCore Series offers I-T4x3500HD ® • Onboard high-definition analog devices supply and patented class-I output stage with 20 Hz - 20 kHz 1 kHz 20ms Burst amazing power, light weight and ease of use for Sharc ®...

  • Page 6: Setup

    I-Tech HD DriveCore Series Power Amplifiers 2 Setup When using an equipment rack, mount units 2.1 Unpack and Install Your cAUTiON: Before you begin, make sure directly on top of each other. Close any open Amplifier your amplifier is disconnected from the spaces in rack with blank panels.

  • Page 7: Connecting To Ac Mains

    N N N ET ET ETW W W O O O R R R K K K When using network connections, pass the CAT 5 cable five times through a ferrite core (Figure 2.4), available from Crown Audio Inc. This is to ensure compliance with emission regulations.
  • Page 8 I-Tech HD DriveCore Series Power Amplifiers 2 Setup 2.3.2 Choose Input Wire and Connectors cAUTiON – SHOcK HAZARd: Potentially lethal voltages exist at the output connectors when the amplifier is Crown recommends using pre-built or professionally wired, turned on and is passing a signal. bal anced line (two-conductor plus shield), 22-24 gauge cables and connectors.
  • Page 9 I-Tech HD DriveCore Series Power Amplifiers 2 Setup 101-150 ft. 8 AWg 151-250 ft. 6 AWg cAUTiON: Never use shielded cable for output wiring. Channel 1 Channel 2 2.3.4 Stereo Mode Wiring Typical input and output wiring is shown in Figure 2.9. iMPORTANT: Turn off the amplifier and unplug its power cord.
  • Page 10 I-Tech HD DriveCore Series Power Amplifiers 2 Setup Analog ® Table 1 and Figure 2.10: Wire one Speakon cable connector to two speakers. Insert ® ® the Speakon cable connector into the amplifier’s top Speakon connector. 2.3.5 Bridge-Mono Mode Overview: Turn on the amp, enable Bridge-Mono mode using the LCD Control Screen, turn off the amp, wire it, and turn it back on.

  • Page 11: Harman Greenedge - Going 'Green

    I-Tech HD DriveCore Series Power Amplifiers 3 HARMAN GreenEdge -Going ‘Green’ without compromise 3.1 Going ‘Green’ 3.3 Green Savings going ‘green’ is no longer an option – it’s a necessity. Protecting the world Here’s an example of the energy savings offered by Crown’s Class-I we live in against adverse climate change is a major objective of socially tour products: responsible governments, businesses and individuals everywhere.

  • Page 12: Integraded Drivecore Tm Technology

    I-Tech HD DriveCore Series Power Amplifiers 4 Integrated DriveCore Technology Class D and Class I amplifiers are notable for extraordinarily high efficiency and being well suited for driving difficult reactive loads such as subwoofers. Crown engineers developed DriveCore™ Technology – a proprietary hybrid analog-digital integrated circuit (IC) developed with Texas Instruments that drives the “front end”...

  • Page 13: Powered By Crown

    I-Tech HD DriveCore Series Power Amplifiers 5 Powered by Crown This I-Tech HD Series amplifier is compatible with the Powered by Crown app. For more information visit: http://www.crownaudio.com/mobileapplications/index.htm iPad iPad The New System Control App from Crown, Available at the Apple App Store. Instantly connect to your Crown networked amps;...

  • Page 14: Operation

    I-Tech HD DriveCore Series Power Amplifiers 6 Operation 6.1 Protecting Your Speakers 6.2 Startup Procedure 2. Use care when making connections, selecting signal sources and controlling the output level. The load you save may be your own! It’s wise to avoid clipping amplifier signals at the input and output. Not When first turning on your amplifier, follow the procedures in the Quick-Start guide on page 4 (stereo) or page 5 (bridge-mono).

  • Page 15: Front Panel Controls And Indicators

    I-Tech HD DriveCore Series Power Amplifiers 6 Operation 6.4 Front Panel Controls and Indicators d. USB 2.0 connector H. Level control (encoder) M. Ready indicator Accepts a USB drive to transfer presets, device files, Speed-sensitive, 0.5 dB steps, range 0 to –100 dB. green LED, one per channel, illuminates when the and update firmware from the drive to the amplifier This knob affect the Channel 1-4 output levels.

  • Page 16: Back Panel Controls, Indicators And Connectors

    I-Tech HD DriveCore Series Power Amplifiers 6 Operation 6.5 Back Panel Controls, Indica tors operation off of one connector, the bottom NL8 H. Preset indicator It is not recommended to loop through more than four and Connectors LED flashes to signal the number of the current preset if active. amplifiers.

  • Page 17: Advanced Operation

    I-Tech HD DriveCore Series Power Amplifiers 7 Advanced Operation Touch Screen Functions Shortcuts: To Navigate: 7.1 Introduction • From the default display view, press and hold the Method 1 Method 2 The LCD Control Screen and its controls let you configure the encoder wheel (with no channels selected) to mute •...

  • Page 18: Operation Example 1

    I-Tech HD DriveCore Series Power Amplifiers 7 Advanced Operation 7.2 Operation Examples 7.2.1 Basic Selections Mute/Unmute (in the Attenuation screen) • To mute a channel: The display will alternate between MUTE and the attenua tion level. While the amplifier is muted, you can adjust Opening Screen: On power-up, the LCD Control Screen dis plays the Operation example 1 attenuation for each channel by tapping to select and turning the...
  • Page 19 I-Tech HD DriveCore Series Power Amplifiers 7 Advanced Operation Sample Rate: Starting from the Attenuation screen, press Menu/exit to go Amp Mode: This screen lets you set up the amplifier for Dual, Input Y or Presets: A preset is a group of DSP and amplifier settings for a particular Bridge Mono mode.
  • Page 20 I-Tech HD DriveCore Series Power Amplifiers 7 Advanced Operation Attenuator Limits: You can set the maximum attenuation from 0 dB to input Sources: For each channel, turn the Encoder to select ana log, digital, Maximum Analog input: Touch the screen to select: +21 dBu or +15 dBu. –100 dB.
  • Page 21 I-Tech HD DriveCore Series Power Amplifiers 7 Advanced Operation AeS input Status: “Lock” indicates that an AES cable is plugged in and the Bandpass gain: In each channel of the I-Tech HD’s DSP, just before the input delay: Sets the input signal delay in each channel. Turn the Encoder amplifier is receiving (and locking to) the AES phase logs logs.
  • Page 22 I-Tech HD DriveCore Series Power Amplifiers 7 Advanced Operation Led Meter display Type : Here you can set the LCD bar meters to display LevelMax - RMS Voltage Limiter: Limits the output rms voltage to an Front Panel Blackout: This screen lets you black out the front panel display average or peak levels.
  • Page 23 I-Tech HD DriveCore Series Power Amplifiers 7 Advanced Operation 7.2.2 MONiTOR MeNU Thermal Temp deg. c: This screen displays the temperature in degrees Watts Output: This displays the slow-averaged continuous output power of Celsius of the Ch. 1 output devices, Ch. 2 output devices, Ch. 3 output each channel in watts.
  • Page 24 I-Tech HD DriveCore Series Power Amplifiers 7 Advanced Operation Low Limit Load errors: This screen lets you view low-load errors without SLM (Sweep Load Monitoring) errors: This screen lets you view SLM Fan errors: When a fan error occurs, the count displayed in this screen is using the control software.
  • Page 25 I-Tech HD DriveCore Series Power Amplifiers 7 Advanced Operation 7.2.4 NETWORKING MENU HiQnet Node Address: This screen lets you set the HiQnet address of this Subnet Mask: You set the Subnet Mask of the amplifier here. See Section 12 This menu has screens for setting up audio network parameters. Push an amplifier (a node in the network).
  • Page 26 I-Tech HD DriveCore Series Power Amplifiers 7 Advanced Operation 7.2.5 COBRANET MENU cobraNet Tx: Tap the icon then turn the Encoder knob to adj. To access the CobraNet Menu from the Attenuation screen, press the Encoder knob, then press Prev. This menu has selections for setting CobraNet parameters.

  • Page 27: Presets

    I-Tech HD DriveCore Series Power Amplifiers 7 Advanced Operation 7.3 Presets 7.3.3 Downloadable Presets We will describe each type of preset in detail. Crown and JBL engineers have designed I-Tech HD DSP presets that are 7.3.1 Introduction 7.3.2 User Presets opti mized for various JBL loudspeakers, such as VerTec Line Arrays.

  • Page 28: List Of Pop-Up And Descriptions

    I-Tech HD DriveCore Series Power Amplifiers 7 Advanced Operation “Lockout” is displayed when front panel lockout has been enabled from either the Lockout software or front panel. It prevents any changes from the display. “USB Lockout” is displayed when USB lockout has been enabled from the software. Lockout It disables all USB functions.

  • Page 29: Digital Audio Options (Aes3 And Vdrive)

    I-Tech HD DriveCore Series Power Amplifiers 7 Advanced Operation 7.5 Digital Audio Options (AES3 and VDrive) 3. The card is setup to obtain its address from a DHCP server, and no You can make the following settings via the device front panel or by DHCP server is available.
  • Page 30 I-Tech HD DriveCore Series Power Amplifiers 7 Advanced Operation 7.7.1 Amplifier DSP Selection Screen On the left of this screen is the Input and Output Signal Level Monitor (explained later on this page). On the right side are rows of DSP selection buttons for each channel. When you double click on a button, a control panel opens for that button’s function.
  • Page 31 I-Tech HD DriveCore Series Power Amplifiers 7 Advanced Operation 7.7.3 Input Level, Fades, Mute, Link, I/O Level Meters, and Indicators This panel is on the left side of the I-Tech HD’s main control panel shown above. Channels 1, 2, 3, and 4 Level Controls set the input signal level of each channel.
  • Page 32 I-Tech HD DriveCore Series Power Amplifiers 7 Advanced Operation 7.7.4 Input Signal Router Each channel of the I-Tech’s signal processing has an Input Signal Router that lets you choose the audio signal that will be used by the channel. Choose one of the following configurations: •...
  • Page 33 I-Tech HD DriveCore Series Power Amplifiers 7 Advanced Operation 7.7.5 Source Configuration In this screen you can configure the levels and settings of the analog, AES and CobraNet inputs. The input signal of each channel can be independently muted. The I-Tech HD amplifier can be set to work as a fixed gain amplifier: any input signal is given a fixed amount of gain, either 26dB or 32dB.
  • Page 34 I-Tech HD DriveCore Series Power Amplifiers 4 Advanced Operation 7.7.6 CobraNet Advanced Settings In the CobraNet Advanced Settings screen you can set the parameters shown here. Indicators that are green can’t be modified. The latency on this screen is the CorbaNet transport latency or buffering.
  • Page 35 I-Tech HD DriveCore Series Power Amplifiers 7 Advanced Operation 7.7.7 Input Signal Compressor An input signal compressor is available for each channel. Several parameters control this feature: On/off button: Enables or disables this function. Threshold: Sets the level, in dBu, above which the compressor begins to attenuate the input signal.
  • Page 36 I-Tech HD DriveCore Series Power Amplifiers 7 Advanced Operation 7.7.9 Input EQ and Output EQ These screens let you adjust channel equalization for up to 16 frequencies. You can select filter type, frequency, gain, and bandwidth in octaves or Q as set by the user preferences in System Architect.
  • Page 37 I-Tech HD DriveCore Series Power Amplifiers 7 Advanced Operation The amplifier contains four FIR blocks which can be used in various Each audio channel has three separate places where filters can be placed in the 7.7.10 Crossover Filters configurations: system: input EQ (16 filters), Crossover, and Output EQ. Up to 24 filters per The Crossover section lets you use infinite impulse response (IIR) or In Duplicate mode the same settings are used on both channels, allowing channel are available, plus crossover filters and 4 filters for the signal...
  • Page 38 I-Tech HD DriveCore Series Power Amplifiers 7 Advanced Operation 7.7.11 LevelMax Suite This is a suite consisting of a peak voltage limiter, average power limiter, clip limiter and thermal transducer limiter. First you will set the mode to automatic or advanced: •...
  • Page 39 I-Tech HD DriveCore Series Power Amplifiers 7 Advanced Operation Continuous Load Monitoring 7.7.13 Amplifier Settings The load supervision feature allows real-time monitoring of the The Amplifier Output enable button turns each channel on load connected to each amplifier channel. When enabled, the I- or off.
  • Page 40 I-Tech HD DriveCore Series Power Amplifiers 7 Advanced Operation 7.7.14 Amplifier Information Information about the amplifier is stored in the software system inven tory and is displayed on the software control panels. Information includes manufacturer, model, date code, and serial number. The green items can’t be edited.
  • Page 41 I-Tech HD DriveCore Series Power Amplifiers 7 Advanced Operation 7.7.17 Preset Manager The control settings for all the functions can be stored as presets. Up to 50 presets can be saved in the I-Tech amp’s nonvolatile memory. Each preset can be named with a 30 character name describing its function, which is also stored in memory.
  • Page 42 I-Tech HD DriveCore Series Power Amplifiers 7 Advanced Operation 7.7.18 Signal Generator All channels share a noise generator that allows noise to be mixed into the audio signal. This is useful for noise masking applications and testing. Each channel has the following controls: •...
  • Page 43 I-Tech HD DriveCore Series Power Amplifiers 7 Advanced Operation Maximum analog Fixed gain input Low +21 26/32 dB Low +21 dBu (0 dB) High +15 dBu (+6 dB) +15 32/38 dB Analog input Source select Fixed Analog Output gain input attenuator compensation AES input trim...

  • Page 44: Troubleshooting

    I-Tech HD DriveCore Series Power Amplifiers 8 Troubleshooting CONDITION: Power indicator is CONDITION: Thermal indicator is off and power switch is not illu­ minated. POSSIBLE REASON: POSSIBLE REASON: • The amplifier is becoming too hot for safe • The amplifier has lost AC power. operation.
  • Page 45 I-Tech HD DriveCore Series Power Amplifiers 8 Troubleshooting CONDITION: Data indicator not flash­ CONDITION: No sound, even though ing, even though host computer the amp has power. Power LED is on software is active. with out flashing and the amp is receiving an input sig nal.

  • Page 46: Specifications

    I-Tech HD DriveCore Series Power Amplifiers 9 Specifications Minimum guaranteed Power i-T4x3500Hd 20 Hz - 20 kHz with 0.35% THd, all channels driven 20 Hz - 20 kHz 1 kHz 20ms Burst 3,500W 2,100W 2-ohm 3,800W 2,200W 2.7ohm 4,000W 2,400W 4-ohm 1,900W 1,900W...
  • Page 47 I-Tech HD DriveCore Series Power Amplifiers 9 Specifications Performance i-T4x3500Hd Damping Factor (8 ohms): 20 Hz to 100 Hz > 5000 Crosstalk (below rated power, 20 Hz to 1 kHz) > 80 dB Common Mode Rejection (CMR) (20 Hz to 1 kHz) >...
  • Page 48 I-Tech HD DriveCore Series Power Amplifiers 9 Specifications Charts Figure 9.1 Typical Frequency Response (1W) Figure 9.2 Typical Crosstalk vs. Frequency Operation Manual page 48...
  • Page 49 I-Tech HD DriveCore Series Power Amplifiers 9 Specifications Figure 9.3 Typical Damping Factor vs. Frequency Operation Manual page 49...

  • Page 50: Ac Power Draw And Thermal Dissipation

    I-Tech HD DriveCore Series Power Amplifiers 10 AC Power Draw and Thermal Dissipation I-Tech 4x3500HD AC Current Draw and Thermal Dissipation: I-Tech 4x3500HD AC Current Draw and Thermal Dissipation: Pink noise 12dB crest factor, bandwidth limited 22Hz to 22kHz. Pink noise 12dB crest factor, bandwidth limited 22Hz to 22kHz. Typical line impedance used.

  • Page 51: Advanced Features

    I-Tech HD DriveCore Series Power Amplifiers 11 Advanced Features 11.1 Protection Systems 11.2 Global Switching Power distro (and couple noise into other sys tem Sup ply with PFC components), PFC draws a smooth and quiet Your Crown amplifier provides extensive current waveform that is in phase with the mains pro tection and diagnostic capabilities, including Thanks to its global power supply, the I-Tech...

  • Page 52: Appendix A: Network And Cobranet Basics

    I-Tech HD DriveCore Series Power Amplifiers 12 Appendix A: Network and CobraNet Basics 12.1 HiQnet Networks Background: A Local Area Network (LAN) is a group of computers in a venue that share data, either through cables or via wireless transmission. ethernet is a popular LAN communication protocol for PCs.
  • Page 53 I-Tech HD DriveCore Series Power Amplifiers MAc address: Short for Media Access Control, MAC is an address for an audio compo nent that is burned into firmware in the component by its manufacturer, and cannot be changed. Every component in a network has its own unique MAC address. The MAC address is printed on a label outside the component.

  • Page 54: A Closer Look At Cobranet

    I-Tech HD DriveCore Series Power Amplifiers 12.2 A Closer Look at CobraNet Licensed by Cirrus, CobraNet is a protocol, firmware and hardware that lets you trans- mit digital audio over a 100Base-T Fast-Ethernet network. This section provides an overview of CobraNet. Cirrus Logic has provided a number of technical papers that describe CobraNet in detail.
  • Page 55 I-Tech HD DriveCore Series Power Amplifiers In System Architect, you create audio connections between sending 12.2.4 The Conductor In effect, each network port in an audio component has 100MB of devices (transmitters) and receiving devices (receivers). For example, band width. The network can be as large as 100MB times the number A CobraNet system is coordinated by one audio device in the network a mixer could be a transmitter, and a power amp could be a receiver.

  • Page 56: Levelmax Tm Limiter Suite

    I-Tech HD DriveCore Series Power Amplifiers 13 LevelMAX Limiter Suite The I-Tech HD LevelMAX™ Limiter Suite features three types of limiting: • Peak • • Transducer Thermal and three modes of operation: • Auto • Advanced • Manual (OEM Factory Locked) The standard i-Tech HD LevelMAX limiter panel (Advanced Mode) is shown below: LevelMAX has been designed to limit accurately to the specified voltage...

  • Page 57: Levelmax Limiters

    I-Tech HD DriveCore Series Power Amplifiers 14 LevelMAX Limiters 14.1 LevelMAX Peak Limiter constant regardless of whether the LevelMAX Limiter suite is enabled 14.8 LevelMAX Transducer Thermal Limiter (ON) or bypassed (OFF). LevelMAX Peak limiting instantaneously limits the output voltage to LevelMAX Transducer Thermal limiting is designed to protect not exceed the defined peak threshold voltage.

  • Page 58: Appendix B: Table Of Parameters Modified By Each Mode

    I-Tech HD DriveCore Series Power Amplifiers 15 Appendix B: Table of Parameters Modified by Each Mode with LevelMAX Limiter Suite Enabled Parameter Auto Advanced Visible in Main Panel   Peak Enable   Peak Threshold   Peak Attack ...
  • Page 59 (See Below) Peak Release 0.1ms-10s I-Tech HD 9000 217.6 RMS Threshold 1-200V I-Tech HD 12000 233.4 RMS Attack 0-10s I-Tech 4x3500 HD 217.6 RMS Release 0-10s RMS Detector Time 1ms-1s Thermal Threshold 1-200V 0.1V Thermal Attack 1-600V Thermal Slope (Kp & Ki)

  • Page 60: Application Of Fir Filters To Loudspeakers Crossovers

    I-Tech HD DriveCore Series Power Amplifiers 16 Application of FIR Filters to Loudspeaker Crossovers 16.1 FIR Overview Digital filters may be further classified into two general types: Infinite 16.3 Pros and Cons of IIR and FIR Filters Impulse Response (IIR) and Finite Impulse Response (FIR). Fundamen- The powerful DSP processing in the latest Crown I-Tech HD Series The following table lists several characteristics of the two types of tally, IIR filters include feedback (recursion) in their implementation...

  • Page 61: High Rolloff And Steep Slopes

    I-Tech HD DriveCore Series Power Amplifiers 16 Application of FIR Filters to Loudspeaker Crossovers 16.5 High Rolloff and Steep Slopes 16.7 Polar Lobing Error 16.9 FFT Convolution Polar lobing is a potential problem when spatially separated The resource requirements of a high-performance FIR filter in terms of FIR filters can be designed to have extremely high stop-band rolloffs non-coincident drivers are crossed over.

  • Page 62: Filter Design

    I-Tech HD DriveCore Series Power Amplifiers 16 Application of FIR Filters to Loudspeaker Crossovers 16.10 Filter Design 16.11 Low Latency 96 kHz Studio Quality Filters Real World Benefits IIR filters are typically based on an equivalent analog circuit. Because Because of the extreme computational load imposed by high rolloff FIR 16.12 Measurements of Two-way of this, the IIR design process is a straightforward matter of converting crossover filters, a potent DSP and highly optimized FFT Conbolution...
  • Page 63 I-Tech HD DriveCore Series Power Amplifiers 16 Application of FIR Filters to Loudspeaker Crossovers Note that the individual driver responses were first equalized using the The following two graphs in Fig. 16.4 show the theoretical frequency The next two graphs in Fig. 16.5 show the measured individual driver amplifier’s parametric equalizer to be more of less flat over a response magnitude (left) and phase (right) of a 3 kHz LR 4 -order...

  • Page 64: Fir Measurements

    I-Tech HD DriveCore Series Power Amplifiers 16 Application of FIR Filters to Loudspeaker Crossovers The remaining two LR crossover graphs in Fig. 17.6 show the 16.13 FIR Measurements reversed-polarity on-axis response and the ±25° off-axis response. The Crown I-Tech HD amplifier was used to create a linear-phase FIR note that when the tweeter leads are reversed, the response exibits a crossover with a 3.67 ms latency.

  • Page 65: Conclusions

    I-Tech HD DriveCore Series Power Amplifiers 16 Application of FIR Filters to Loudspeaker Crossovers 16.15 Refereces For those who want a more in depth treatment of the topics in this white paper, here are three good reverences. [1.] A.V. Oppenheim, R. W. Schafer, Digital Signal Processing, Woofer (Prentice Hall, Englewood Cliffes, NJ, 1975).

  • Page 66: Service

    Complete the Crown Audio Factory Service Information 1. Fill out and include the Crown Audio Factory Ser vice For more information, please contact us direct. form, in the back of this manual, when returning a Crown 4. Enclose the completed Crown Audio Factory Service Information sheet in the back of this manual.

  • Page 67: Warranty

    I-Tech HD DriveCore Series Power Amplifiers 18 Warranty UNiTed STATeS & cANAdA SUMMARY OF WARRANTY the actual purchase price, not including inter est, THIS INCLUDES ANY DAMAgE TO ANOTHER insurance, closing costs, and other finance PRODUCT OR PRODUCTS RESULT INg FROM Crown International, 1718 West Mishawaka Road, charges less a reasonable depreciation on the SUCH A DEFECT.
  • Page 68 I-Tech HD DriveCore Series Power Amplifiers 18 Warranty WORLdWide eXcePT USA & cANAdA SUMMARY OF WARRANTY WHAT THe WARRANTOR WiLL dO diScLAiMeR OF cONSeQUeNTiAL ANd iNcideNTAL dAMAgeS Crown International, 1718 West Mishawaka Road, We will remedy any defect, regardless of the Elkhart, Indiana 46517-4095 U.S.A.

  • Page 69: Product Registration

    I-Tech HD DriveCore Series Power Amplifiers PROdUcT RegiSTRATiON Harman International 1718 W. Mishawaka Rd. Elkhart, IN 46517-9439 Phone: 574-294-8000 Fax: 574-294-8329 www.crownaudio.com Online registration is also available at http://crownweb.crownintl.com/webregistration. Warranty is only valid within the country in which the product is purchased. When this form is used to register your product, it may be mailed or faxed.
  • Page 70 I-Tech HD DriveCore Series Power Amplifiers THIS PAgE INTENTIONALLY LEFT BLANK Operation Manual page 70...

  • Page 71: Crown Audio Factory Service Information

    Crown Audio Factory Service Information Shipping Address: Crown Audio Factory Service, 1718 W. Mishawaka Rd., Elkhart, IN 46517 PLEASE PRINT CLEARLY SRA #: __________________(If sending product to Crown factory service.) Model: ____________________________________________ Serial Number: _____________________ Purchase Date: _____________ PRODUCT RETURN INFORMATION...

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