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Bass EQ Control

In vehicle sound systems they have a tendency to peak at about

100Hz to 120Hz and to roll off after that. This leaves a hole in the bass
response in the 40Hz to 50Hz range.

To compensate for this effect, ZAPCO has provided all Reference

Series amplifiers with a variable Bass equalization circuit. Each amplifier
has a “Bass Boost” control, which allows adjustment of the bass from 0dB to
as much as 18dB. This adjustment is made at a frequency of 44Hz.

Use the Bass EQ with caution. Too much equalization can easily

cause amplifier clipping and may even damage your speakers.

Bass Equalization Curves

Summary of Contents for Reference 1000.4

Page 1: ......

Page 2: ...m 7 Specifications You Can Hear 8 Warnings 10 Wire Size 11 Installation Guidelines 12 Reference Series Accessory 13 Reference Series 2 Channel Amplifiers 21 Reference 200 2 22 Reference 350 2 26 Refer...

Page 3: ...2 Reference Series Multi Channel Amplifiers 47 Reference 360 4 48 Reference 1000 4 54 Reference 650 6 60 System Diagrams 67 Technical Assistance 92...

Page 4: ...from doing There is absolutely no substitute for experience that is a simple fact of life Another simple fact is that ZAPCO has for over thirty years been the leader in defining quality standards for...

Page 5: ...o run full power on all day long The Reference Series amplifiers have only 1 times the outputs devices required We still overbuild the Reference Series by 50 just not as much as the Studio This is a d...

Page 6: ...able from the transmitter to the amplifier Everyone will get balanced for free What s next Only time will tell But here s one thing you can count on As ZAPCO finds new ways to improve the state of the...

Page 7: ...d in ZAPCO products bipolar and MOSFET MOSFET transistors are rugged high current output devices that are best suited as switches They are the choice for switching power supplies They are however very...

Page 8: ...grade signal fidelity at every turn Capacitive loading due to the long cable lengths the potential for ground loops alternator charging currents or currents generated by the amplifiers themselves are...

Page 9: ...rdless of its power In most amp lines the largest units have damping factors between 100 and 200 Since rock solid bass is perceived as a function of power our 100 watt amp sounds like other brands 300...

Page 10: ...able margin Our superior design and construction give our amplifiers advantages that go beyond power output and provide a sound quality difference you will hear the moment you turn your system on A WO...

Page 11: ...ing hinges and seats This also includes brake gas and clutch pedals hood and trunk hinges etc Caution Continuous exposure to excessive sound pressure levels may cause permanent hearing loss ZAPCO stro...

Page 12: ...10 8 8 6 6 4 4 4 50 60 amps 8 8 6 4 4 4 4 2 65 85 amps 6 6 4 4 2 2 2 0 85 105 amps 6 6 4 2 2 2 2 0 105 125 amps 4 4 4 2 2 0 0 0 125 150 amps 2 2 2 2 0 0 0 0 Lets look at a fairly small system If you u...

Page 13: ...unded or left isolated The amplifier requires adequate ventilation Position the amplifier with sufficient surrounding area for proper cooling Keep fan and vent endplates clear for proper internal cool...

Page 14: ...t the connections from stray hands and feet we have connection covers available for all Reference Series amplifiers ZAPCO s legend hasn t always been built on the appearance of our products but on tec...

Page 15: ...uilt into our products will go unrealized by many users To ensure that every ZAPCO Reference Series amplifier can realize its full potential we provide an SLDIN T F Balanced Line Transmitter with ever...

Page 16: ...nt for our bass equalization circuitry The Reference 500 1 1100 1 and 1000 4 amplifiers have a Bass Boost port on the control plate Simply plug in the optional DBC Dynamic Bass Control and you can mak...

Page 17: ...monic distortion system noise and signal loss due to the long cable runs common in car audio systems Despite these drawbacks RCAs have been around a long time and are very common so ZAPCO has provided...

Page 18: ...es no special tools Whether you have a simple system with a deck and an amp or a system with a deck line driver equalizer crossover and amp the procedure is always the same First hook up the system wi...

Page 19: ...ion the input stage will combine the left channel and right channel information into a single mono channel and feed that information to both sides of the amplifier You can then bridge the outputs into...

Page 20: ...or this effect ZAPCO has provided all Reference Series amplifiers with a variable Bass equalization circuit Each amplifier has a Bass Boost control which allows adjustment of the bass from 0dB to as m...

Page 21: ...e exactly what crossover frequency the amp will use In the example above the crossover is set at 95Hz and is set for high pass Some of the Reference amplifiers have a range switch as well By pushing t...

Page 22: ...21 Reference Series 2 Channel Amplifiers...

Page 23: ...22 Reference 200 2...

Page 24: ...2 2 14 Bridged Mono 134 watts x 1 8 046 T H D 205 watts x 1 4 12 T H D Frequency Response 20 20kHz 12dB S N Ratio 95dB Transient Distortion 4 40W 01 Slew Rate 23 V S Damping Factor 166 4 Input Sensiti...

Page 25: ...24 Front Panel Layout...

Page 26: ...CA Unbalanced Inputs Two Ohm Stereo Stable 18 dB Variable Bass Boost Control Built in Variable Electronic Crossover Bridgeable Three Channel Capable High Current Bipolar Outputs Optically Isolated MOS...

Page 27: ...26 Reference 350 2...

Page 28: ...2 2 047 Bridged Mono 210 watts x 1 8 046 T H D 330 watts x 1 4 12 T H D Frequency Response 20 20kHz 25dB S N Ratio 96dB Transient Distortion 4 40W 015 Slew Rate 29 V S Damping Factor 200 4 Input Sensi...

Page 29: ...28 Front Panel Layout...

Page 30: ...CA Unbalanced Inputs Two Ohm Stereo Stable 18 dB Variable Bass Boost Control Built in Variable Electronic Crossover Bridgeable Three Channel Capable High Current Bipolar Outputs Optically Isolated MOS...

Page 31: ...30 Reference 750 2...

Page 32: ...dged Mono 780watts x 1 4 Mono 2 Frequency Response 20 20kHz 0 5dB S N Ratio 90dB Transient Distortion 4 40W 03 Slew Rate 40 V S Damping Factor 1000 4 Input Sensitivity Balanced DIN 560mV 10V Unbalance...

Page 33: ...32 Front Panel Layouts...

Page 34: ...33...

Page 35: ...e 18 dB Variable Bass Boost Control Two Built in Independent Variable Electronic Crossovers Bridgeable One to Three Channel Capable High Current Bipolar Outputs Optically Isolated MOSFET Power Supply...

Page 36: ...ifiers you will also want to preserve the performance and reliability of your vehicle when making modifications to your electrical system Even though the Reference Series amplifiers are very efficient...

Page 37: ...36 Reference Series Monaural Amplifiers...

Page 38: ...balanced line input only You will notice that there are no RCA inputs on your 500 1 or 1100 1 ZAPCO has included the SLDIN T F with every amplifier Simply plug your head unit or processor into the SLD...

Page 39: ...38 Reference 500 1...

Page 40: ...350 watts x 1 4 04 500 watts x 1 2 20 Frequency Response 20 20kHz 0 5dB S N Ratio 80dB Transient Distortion 4 35W 013 Slew Rate 25 V S Damping Factor 250 4 Input Sensitivity Balanced DIN 250mV 10V Ma...

Page 41: ...40 Front Panel Layout...

Page 42: ...Voltage Output Circuitry Heavy Duty High Current Terminals Compact Chassis Design Two Ohm Mono Stable Dynamic Bass Boost Port 12 dB Variable Bass Boost Control Built in Variable Electronic Crossover H...

Page 43: ...42 Reference 1100 1...

Page 44: ...T H D N 825 watts x 1 4 03 1100watts x 1 2 05 Frequency Response 20 20kHz 0 5dB S N Ratio 90dB Transient Distortion 4 40W 03 Slew Rate 40 V S Damping Factor 700 4 Input Sensitivity Balanced DIN 250mV...

Page 45: ...44 Front Panel Layout...

Page 46: ...45...

Page 47: ...ircuitry Two Ohm Mono Stable Dynamic Bass Boost Port 12 dB Variable Bass Boost Control Heavy Duty High Current Terminal Blocks Compact Chassis Design Gate Drive Boost Circuitry Built in Variable Elect...

Page 48: ...47 Reference Series Multi Channel Amplifiers...

Page 49: ...48 Reference 360 4...

Page 50: ...2 13 Bridged Mono 110 watts x 2 8 05 180 watts x 2 4 1 Frequency Response 20 20kHz 12dB S N Ratio 95dB Transient Distortion 4 40W 01 Slew Rate 23 V S Damping Factor 160 4 Input Sensitivity Balanced DI...

Page 51: ...50 Front Panel Layout...

Page 52: ...A Unbalanced Inputs Two Ohm Stereo Stable 18 dB Variable Bass Boost Control Built in Variable Electronic Crossover Dual Bridgeable 4 ohm Four Channel High Current Bipolar Outputs Optically Isolated MO...

Page 53: ...ectronic crossover The 360 4 however has two crossovers They vary slightly from standard however at the signal mode switch While other reference amps bridge to the right channel the 360 4 bridges the...

Page 54: ...o fade between front and rear The 2 CH mode allows the front inputs to pick up their signal from the rear inputs This lets you run the entire amp on only one set of input cables This is very useful wh...

Page 55: ...54 Reference 1000 4...

Page 56: ...x 4 2 05 Bridged to Dual Mono 500 watts x 2 4 04 Frequency Response 20 20kHz 0 5dB S N Ratio 90dB Transient Distortion 4 40W 03 Slew Rate 36 V S Damping Factor 300 4 Input Sensitivity Balanced DIN 560...

Page 57: ...56 Front Panel Layout...

Page 58: ...57...

Page 59: ...onic Crossovers Dual Bridgeable 4 Ohms Variable Electronic Sub Sonic Filter ZAPCO EHVC Output Circuitry Optically Isolated MOSFET Power Supply 2 Channel 3 Channel or 4 Channel Operation 2 Channel or 4...

Page 60: ...dly the Sub Sonic filter of these units is variable to allow proper tuning of the car and the enclosure Ported enclosures can easily double the acoustic output of a sub woofer at the port tune frequen...

Page 61: ...60 Reference 650 6...

Page 62: ...6 2 2 Max Power 90 watts x 4 2 175 watts x 2 1 2 Frequency Response 20 20kHz 0 5dB S N Ratio 95dB Transient Distortion 4 40W 02 Slew Rate 23 V S Damping Factor 160 4 Input Sensitivity Balanced DIN 500...

Page 63: ...62 Front Panel Layout...

Page 64: ...63...

Page 65: ...s Two Ohm Stereo Stable One Ohm Stereo on Sub Channels 18 dB Variable Bass Boost Control Built in Variable Electronic Crossover Bridgeable Three to Six Channel Capable High Current Bipolar Outputs Opt...

Page 66: ...tion from the other channels 2 CH w Bass See the system diagram section for examples This section of the 650 6 has two separate crossovers available The two crossovers allow channels 1 2 to be used in...

Page 67: ...watts Left 150 watts Right and 350 watts Bass see system diagrams The right hand section of the 650 6 controls channels 5 6 There are two notable differences in this section of the 650 6 First the SO...

Page 68: ...iagrams Reference 200 2 350 2 Page 68 71 Reference 360 4 Page 73 78 82 Reference 750 2 Page 79 81 83 84 Reference 650 6 Page 86 91 Reference 500 1 Page 72 78 Reference 1000 4 Page 85 Reference 1100 1...

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Page 93: ...ctory for a Return Materials Authorization RMA number We will ask you for information that will include your name return shipping address daytime phone number model and serial number and a detailed de...

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