ADS EQ300 Owner's Manual

EQ300

analog and digital systems, inc 300 wildwood avenue woburn, ma 01801

319-0724 revA 3/99

frequency

25Hz --

31.5Hz -40Hz -50Hz -63Hz -80Hz --

100Hz -125Hz -160Hz -200Hz -250Hz -315Hz -400Hz -500Hz -630Hz --

800Hz -1000Hz -1250Hz -1600Hz -2000Hz -2500Hz -3150Hz -4000Hz -5000Hz -6300Hz -8000Hz --

10000Hz -12500Hz -16000Hz -20000Hz --

level

preset 1

level

preset 2

level

preset 3

level

preset 4

2 27

warranty information

There are two things you must do to ensure trouble free service in the event you need warranty repairs. 1 - Keep your original sales receipt in a safe place. A copy of the receipt will be required to obtain warranty service. 2 - Be sure your retail dealer has written the date, the model number , and the serial number (if applicable) of the Pr oduct on the receipt. To give yourself an extra measure of protection, make a separate record of the information about your purchase and keep it in a safe place. In the event you misplace the sales receipt, your dealer may be able to give you a copy. Take a moment now to r ead the terms of your warranty. Check to be sure your sales receipt is dated and has the Product model number and serial number (if applicable) on it. Then put it away in a safe place.

When shipping a Product in for service:

• Enclose a copy of your original sales receipt that has the date, the Product model number and serial number (if applicable) written on it.

• Always ship Products in the complete original packing material.

• Avoid shipping Products via the Postal service. If you must use the Postal service, be sure to register and insure the package.

a/d/s/ Limited Warranty

Analog and Digital Systems, Inc. (a/d/s/) warrants to the original consumer purchaser of the a/d/s/ Products described in this manual, that the Product will be free from defects in materials and workmanship for a period of one (1) year after the date of purchase. If the product is installed by an authorized a/d/s/ retail dealer, the warranty is extended to three (3) years, a/d/s/' sole obligation under this warranty shall be to provide, without charge, parts and labor necessary to remedy the defects, if any, that appear during the warranty period.

introduction

Thank you for your purchase of the a/d/s/’s EQ300. The latest technological advancement in car audio signal processing. The EQ300 processes all the equalization in the digital domain and comes equipped with both analog to digital and digital to analog converters. The EQ300 contains four preset stations called “presets” which allow storage of several useful equalization curves. This is especially useful in sound-off competition where the EQ300 presets can be set for “Sound Quality”, “RTA”, “SPL” and regular listing. The addition of a EQ300 to a system is a must for a competition system or for people who demand the best.

This manual is designed to answer your questions about this product. To accomplish this task, the manual is divided into several different sections according to the type of questions you may have. These sections are Introduction, What’s in the Box, Technical Overview, System Planning, Installation, User Interface, International Reference, Tr ouble Shooting, Specifications and Warranty . In the event you have questions not covered in this reference, please refer questions to your local Authorized a/d/s/ Dealer. Additionally, you can call a/d/s/’s Technical Support Hotline at

781.729.1140 for assistance.

Record your serial number and date:

This warranty is the sole and exclusive express warranty given with respect to the Product. All other express warranties are hereby excluded. Neither a/d/s/ nor the authorized dealer who sells the Product is responsible for indirect, incidental, or consequential damages. Some states do not allow the exclusion or limitation of incidental or consequential damages, so the above limitation or exclusion may not apply to you. This warranty gives you specific legal rights and you may also have other rights which vary from state to state. IMPORTANT - Keep your original sales receipt. Be sure the retail dealer has written on it the date, model number, and serial number (if applicable) of the Product. This information is required for warranty service.

This warranty is limited to:

• Products purchased from authorized a/d/s/ retail dealers in the United States. a/d/s/ will supply a list of authorized dealers on request.

In order to obtain warranty service you must:

• Return the Product, freight prepaid, to the a/d/s/ dealer from which it was purchased, an authorized a/d/s/ independent service agency, or to a/d/s/. If necessary you may call a/d/s/ Customer Service Department for the names and addresses of authorized independent service agencies in your area.

• Provide proof of purchase in the form of a copy of your original sales receipt. The date, model number, and serial number (if applicable) of the Product must be written on the sales receipt.

This warranty does not cover:

• Damage that is the result of misuse, abuse, accident (including but not limited to damage by water), faulty hookup, defective or maladjusted associated equipment, or the use of the Product with equipment for which it was not intended.

• Cosmetic defects that appear more than thirty (30) days after the date of purchase. Cosmetic damage caused by improper handling is also excluded.

• Products that are used for commercial purposes.

• The cost of removing or reinstalling the Product.

• Damage that occurs while the Product is being shipped to whoever will service it. See the information above regarding shipping procedures.

This warranty is void if:

• The Product identification or serial number label is removed or defaced in any way.

• The Product is serviced or repaired by any one other than a/d/s/ or an authorized a/d/s/ dealer or service agency.

Serial Number: Date of Purchase:

what’s in the box

QTY Description 1 EQ300 1 4 conductor 12 gauge power connector 4 #8 Philips Pan Head Screws 1 EQ300 Reference Manual

technical overview

Designed for the person who competes or wants the maximum performance possible, the EQ300 is a must for all high-end systems. Each channel of the EQ300 can be adjusted individually or be linked together. The EQ300 can accept direct digital input (TOSLINK and COAX) from a digital output source unit or changer, RCA input or Balanced input (Mini-XLR) for use with balanced output signal processors or OEM integration. The EQ300 process all Equalizer and output level functions digitally. After the information is processed, The EQ300 can transmit the information digitally (via TOSLINK or COAX) for an outboard Digital-to-Analog converter or can convert the digital signal internally with its built-in Digital-to-Analog converter for either balanced output or conventional RCA . There is also a serial data port for future remote and IBM compatible laptop computers control. T rue Digital Equalization: All equalization is performed digitally by proprietary digital algorithms. Digital equalization achieves perfect phase response. The signal-to-noise ratio is unaffected by equalization adjustments. Frequency centers, boost levels and “Q” values are exact. There is no variance like analog circuits. Additionally, digital equalization eliminates oscillations normally associated with analog circuits.

symptom

Poor bass response

probable cause

poor output connections

Signal processors are blown or damaged

Amplifiers are blown or damaged

Speakers are blown or damaged

Speakers wired with wrong polarity causing cancellation at low frequency

action to take

Check output connections and fix or replace as needed

Check system with know working signal processors and fix or replace as needed

Check system with know working amplifiers and fix or replace as needed

Check system with know working speakers and fix or replace as needed

Check speaker polarity and fix as needed

30 bands separate left and right adjustment: 30 bands of equalization set to the exact frequencies on 1/3 Real Time Analyzers. Left and right channels can be adjusted individually.

4 presets: 4 working presets allows for different preset curves for differ ent listening preferences.

Analog Input Section: The EQ300 Uses an 18 bit balanced sigma delta analog-to-digital

converter with 196 times oversampling. It accepts both RCA and Balanced (Mini XLR) inputs. Left and right input sensitivity adjustments are fully variable and independent.

Digital Input Section: The digital input section uses a Professional Grade SPDIF receiver. This is the same receivers used in high-end home audio and professional applications. The EQ300 supports 44.1 kHz and 48 kHz sampling frequencies and both TOSLINK and COAX digital inputs.

Analog Output Section: The analog output section is a wide dynamic range 18 bit continuous bitstream calibration digital-to-analog converter (made by Phillips) with 196 times oversampling. It has low total harmonic distortion with no “zero crossover” distortion and incorporates digital de-emphasis. The EQ300 has both RCA and Balanced (Mini XLR™) Outputs. The output voltage is 9 Volts rms. output for the RCA outputs and 18 Volts rms. output (9 Volts rms. output per phase) for a balanced system.

Digital Outputs: Digital outputs use Professional Grade SPDIF transmitters. Theses are the same receivers used in high-end home audio and professional applications. The output frequency

44.1 kHz. The EQ300 supports both TOSLINK and COAX digital formats.

C-Lock™ Anti-Jitter Reduction Circuit: C-Lock anti-Jitter clock recovery system virtually

eliminates jitter from a digital signal. Jitter in a digital signal creates amplitude errors in rapidly changing signals. The C-Lock circuitry strips away the existing clock information and replaces it with a reconstituted correctly time clock. The result is a perfectly timed digital signal.

Battery fuse blowing

Balanced inputs are wired with wrong polarity causing cancellation at low frequency

Short in power wire or incorrect power connections.

Fuse used is smaller than recommended

Too much current being drawn

Fuse used is smaller than recommended

Check Balanced cable polarity and fix as needed

Check power and ground connections and fix or repair as needed

Replace with proper fuse size

Check power and ground connections and fix or repair as needed

Replace with proper fuse size

Power Supply: The power supply used in the EQ300 is a balanced high-frequency power supply. For optimal noise isolation, power and signal grounds are isolated.

Computer interface: The EQ300 uses a RJ-11 port that supports a IBM computer compatible RS-232 data interface that will be released in the future.

troubleshooting

symptom

No output

probable cause

Low or no remote turn-on input

Fuse blown

Power wires not connected

Audio input not connected

action to take

Check remote turn-on voltage output at amplifier and fix as needed

Check power wire integrity and check for speaker shorts. Fix as needed and replace fuse

Check power wire and ground connections and fix or replace as needed

Check input connections and fix or replace as needed

call out features

1. LED Display

2. Parameter Adjustment Key Pad

3. Parameter Selection Buttons

4. RS-232 Data Control Port

5. DSP Reset Button

6. Power connections

7. TOSLINK digital inputs and outputs

8. Digital input selection switches

9. COAX digital inputs and outputs

10. Balanced outputs

11. RCA inputs and outputs

12. Balanced inputs

13. Analog input level adjustment

No output

Audio cycles on and off

Distorted output

Audio output not connected

Speakers are blown

Amplifier not working

Analog/Digital input selector improperly configured

TOSLINK/COAX input selector improperly configured

Analog input gains set to low

Thermal protection engage when unit temperature exceeds 90°C

Loose or poor audio input

Loose power connections

Units input sensitivity set too high. Exceeding maximum capability of audio outputs

Check output connections and fix or replace as needed

Check system with known working speaker and fix or replace speakers as needed

Test with known working amplifier and repair or replace amplifier as needed.

Reconfigure Analog/Digital input selector to its proper setting

Reconfigure TOSLINK/COAX input selector to its proper setting.

Reset input gains. Refer to the section “SETTING ANALOG INPUT LEVELS” in this manual for details.

Make sure there is proper ventilation for unit and improve ventilation as needed

Check RCA connections and fix or replace as needed

Check power wire and ground connections and fix or replace as needed

Reset input gain. Refer to section “SETTING ANALOG INPUT LEVELS” in this manual for detailed instructions

installation

The installation of all a/d/s/ components will determine the overall performance result. Improper installation will not only limit the performance of your a/d/s/ system but also potentially compromise the reliability of this digital processor. To ensure proper sonic results and component reliability, please refer to your Authorized a/d/s/ dealer for installation assistance of advice. If you decide to perform the installation yourself, read the entire installation section of this manual before beginning the installation.

+ 9 hidden pages

ADS EQ300 Owner's Manual

Specifications and Main Features

Frequently Asked Questions

User Manual