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DEQ 30 MANUAL

HIGH PERFORMANCE CAR AUDIO

HIGH PERFORMANCE CAR AUDIO

©2002 Directed Electronics, Inc. - All rights reserved - G41700  8-02

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DESIGNED AND ENGINEERED IN THE USA

Summary of Contents for DEQ 30

Page 1: ...PERFORMANCE CAR AUDIO HIGH PERFORMANCE CAR AUDIO 2002 Directed Electronics Inc All rights reserved G41700 8 02 HIGH PERFORMANCE CAR AUDIO AMPLIFIERS SIGNAL PROCESSORS AND LOUDSPEAKERS DESIGNED AND ENG...

Page 2: ...EQ 30 presets can be set for Sound Quality RTA SPL and regular listening The addition of a DEQ 30 to a system is a must for a competition system and for people who demand the best This manual is desig...

Page 3: ...2 51 WHAT S IN THE BOX QTY Description 1 DEQ 30 1 4 conductor 12 gauge power connector 4 8 Phillips Pan Head Screws 1 DEQ 30 Reference Manual NOTES...

Page 4: ...year period there will be no charge for this replacement PROVIDED the unit is returned to Directed shipping pre paid This warranty is non transferable and does not apply to any unit that has been mod...

Page 5: ...es 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...

Page 6: ...port that supports a IBM computer compatible RS 232 data interface Additionally there will be an optional remote interface that will be released in the future SPECIFICATIONS TRUE DIGITAL EQUALIZATION...

Page 7: ...as needed Speakers are blown or damaged Check system with known working speakers and fix or replace as needed Poor bass response Speakers wired with wrong Check speaker polarity and fix as needed pol...

Page 8: ...t amplifier and fix as needed Fuse blown Check power wire integrity and check for speakers shorts Fix as needed and replace fuse Power wire not connected Check power wire and ground connection and fix...

Page 9: ...quency response that has smooth transitions from octave to octave and compensates for the road and vehicle noise To get the best sound quality in a system use an RTA to detect and resolve problems but...

Page 10: ...additional trunk mounted signal processors This connection provides 12V to the remote turn on leads of the amplifiers to amplifiers on NOTE A power reset button located next to the power connections...

Page 11: ...DEQ 30 first as a cut only device to try to smooth out the non linearity of the system Cut frequencies gradually starting with the center point of the problem area Do not cut the centered band to get...

Page 12: ...g It is the same converter used in high end professional recordings The result is a near invisible conversion from the analog to the digital domain Properly setting the level of the DEQ 30 requires a...

Page 13: ...amine the surrounding of the speaker If any object blocks the path of the speakers remove it If this is not possible minimize the effect of the obstruction by applying a type of absorption material on...

Page 14: ...is now perfectly level matched for your system Maximum output on your CD player will yield more than 4 volts rms per phase output The DEQ 30 is also optimally configured for digital output CLIP LED I...

Page 15: ...starting frequency where the roll off begins and R is the nominal impedance of the tweeter In the above situation the nominal impedance is 4 the starting roll off frequency is 12 500Hz The capacitance...

Page 16: ...for digital input TOSLINK or COAX When the digital output is selected the level button when pressed accesses a digital attenuation control This can be used for a volume control or to set the digital...

Page 17: ...increase the level of the tweeter If you have an active system balance the level between the midrange and the tweeter by raising the level of the midrange Once you have achieved a balance between the...

Page 18: ...performance digital to analog converter with a built in 30 band equalizer Digital outputs incorporate a professional grade SPDIF transmitter that supports both TOSLINK and COAX digital connections Thi...

Page 19: ...the crossover frequency Non Equalizer Solutions The first thing to try is to change the polarity of one of the drivers A general rule of thumb change the polarity of the driver that has a lower operat...

Page 20: ...d simultaneously The channels are LINKED When only the L LED is illuminated only the left channel is being adjusted The channels are UNLINKED When only the R LED is illuminated only the right channel...

Page 21: ...ieved a balance between the tweeter and midrange integrate the level of the woofer by similar tuning techniques Equalizer Solutions If you have followed the instructions above there should be little n...

Page 22: ...n Pressing the L R button selects the DEQ 30 for either left channel right channel or both channels to be adjusted The channel being adjusted will be indicated by the illuminated LED indicators Pressi...

Page 23: ...ic but repetitive frequency response errors The response errors are determined by the frequency wavelengths and the speaker locations and phase relationships relative to the listening area This type o...

Page 24: ...sponse Only after accomplishing the above items can you effectively and correctly equalize your system To begin with basic equalization first familiarize yourself with user interface controls as descr...

Page 25: ...ade as a result of listening fatigue As you become more aware of the effects of listening fatigue you can better judge the duration of your listening interval to minimize this effect Resonance is the...

Page 26: ...roblems with your system and not a particular recording Continue this process until all the frequency irregularities have been eliminated Since the DEQ 30 has four preset working zones work in three o...

Page 27: ...y of a system frequency response Typically this response is displayed in 1 3 octave bands A 1 3 octave display has enough resolution to detect non linear frequency response problems Optimized to work...

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