Owner's Manual
Page 1
... • COPYRIGHT ©1999 SERIAL NUMBER MANUFACTURING DATE THE FOLLOWING ARE TRADEMARKS/REGISTERED TRADEMARKS OF MACKIE DESIGN INC.: "MACKIE", "FR SERIES", & THE "RUNNING MAN" FIGURE LIMITER OFF ON CONSTANT DIRECTIVITY HORN EQ ...4.5k Hz OFF ON OFF 170 Hz 2k Hz 6k Hz AIR EQ TYPICAL AMP MODE STEREO MONO BRIDGE CAUTION RISK OF ELECTRIC SHOCK DO NOT OPEN WARNING: TO... + - DO NOT REMOVE COVER. M•800 OWNER'S MANUAL AND WARRANTY REGISTRATION ™ HIGH-CURRENT POWER AMPLIFIER FULL SYMMETRY DUAL DIFFERENTIAL HIGH CURRENT DESIGN 00 00 CH GAIN/dB 1 3v 16 18 20 SIG...
... • COPYRIGHT ©1999 SERIAL NUMBER MANUFACTURING DATE THE FOLLOWING ARE TRADEMARKS/REGISTERED TRADEMARKS OF MACKIE DESIGN INC.: "MACKIE", "FR SERIES", & THE "RUNNING MAN" FIGURE LIMITER OFF ON CONSTANT DIRECTIVITY HORN EQ ...4.5k Hz OFF ON OFF 170 Hz 2k Hz 6k Hz AIR EQ TYPICAL AMP MODE STEREO MONO BRIDGE CAUTION RISK OF ELECTRIC SHOCK DO NOT OPEN WARNING: TO... + - DO NOT REMOVE COVER. M•800 OWNER'S MANUAL AND WARRANTY REGISTRATION ™ HIGH-CURRENT POWER AMPLIFIER FULL SYMMETRY DUAL DIFFERENTIAL HIGH CURRENT DESIGN 00 00 CH GAIN/dB 1 3v 16 18 20 SIG...
Owner's Manual
Page 3
...Mackie Designs Inc., All Rights Reserved. manent hearing loss. We appreciate your serial number here for a power amplifier to handle is paramount to sound reinforcement. please see the Quick Start on real, proven design principles. ing loss. Lend Me Your Ears Exposure to extremely high noise levels may wonder why a power amp... tectors in order to prevent a permanent hearing loss if exposure is the attention to pay extra for choosing a Mackie Designs power amplifier! After all, our equipment has traveled all , you for - Printed in excess of purchase: Part No...
...Mackie Designs Inc., All Rights Reserved. manent hearing loss. We appreciate your serial number here for a power amplifier to handle is paramount to sound reinforcement. please see the Quick Start on real, proven design principles. ing loss. Lend Me Your Ears Exposure to extremely high noise levels may wonder why a power amp... tectors in order to prevent a permanent hearing loss if exposure is the attention to pay extra for choosing a Mackie Designs power amplifier! After all, our equipment has traveled all , you for - Printed in excess of purchase: Part No...
Owner's Manual
Page 4
...is the typical setup for each channel are wired tip = hot (+) ring = cold (-) sleeve = shield (ground) They can mount the M•800 amp in any standard rack system (see page 18), or place it horizontally on a floor or table. one or two inputs, one speaker. In BRIDGE ... impedance you 're using constant directivity horns with separately-adjustable level controls. • BRIDGE mode (sometimes called DualMono mode - An M•800 power amplifier in from your application: • STEREO mode (separate left and right inputs, separate left and right outputs) is for sending the same ...
...is the typical setup for each channel are wired tip = hot (+) ring = cold (-) sleeve = shield (ground) They can mount the M•800 amp in any standard rack system (see page 18), or place it horizontally on a floor or table. one or two inputs, one speaker. In BRIDGE ... impedance you 're using constant directivity horns with separately-adjustable level controls. • BRIDGE mode (sometimes called DualMono mode - An M•800 power amplifier in from your application: • STEREO mode (separate left and right inputs, separate left and right outputs) is for sending the same ...
Owner's Manual
Page 5
... LIMITER ON for most appliciations. • Make sure the OL lights do not come on . 14. You may lead to the amp. 13. NE PAS OUVRIR CONCEIVED, DESIGNED, AND MANUFACTURED BY MACKIE DESIGNS INC • WOODINVILLE WA • 98072 • USA • MADE IN USA • PATENTS PENDING • COPYRIGHT ... cables to CH 2's red binding post. • Plug nothing into a 3-prong AC outlet capable of delivering at least 12 amps (US model). 12. Turn the M•800's POWER switch on and verify that the NORM Channel Status LED is : The OL LEDs should now hear the lovely music. 15. Slowly...
... LIMITER ON for most appliciations. • Make sure the OL lights do not come on . 14. You may lead to the amp. 13. NE PAS OUVRIR CONCEIVED, DESIGNED, AND MANUFACTURED BY MACKIE DESIGNS INC • WOODINVILLE WA • 98072 • USA • MADE IN USA • PATENTS PENDING • COPYRIGHT ... cables to CH 2's red binding post. • Plug nothing into a 3-prong AC outlet capable of delivering at least 12 amps (US model). 12. Turn the M•800's POWER switch on and verify that the NORM Channel Status LED is : The OL LEDs should now hear the lovely music. 15. Slowly...
Owner's Manual
Page 6
... FEATURE DESCRIPTIONS: Each and every knob, switch, and connector on the M•800 power amplifier is for more information about this to the M•800. This icon leads you to visit our website: www.mackie.com for you tech-heads who like to keep in a sound system, with each... 4 APPLICATION DIAGRAMS 7 FEATURE DESCRIPTIONS 10 GAIN 10 METERS 11 CHANNEL STATUS 11 POWER 11 SPEAKER OUTPUTS 12 POWER CORD 12 INPUT 13 THRU 13 LOW CUT FILTER 14 CD FREQUENCY 15 CONSTANT DIRECTIVITY 15 AMP MODE 16 STEREO 16 MONO 16 BRIDGE 16 LIMITER 17 GENERAL PRECAUTIONS 18 RACK ...
... FEATURE DESCRIPTIONS: Each and every knob, switch, and connector on the M•800 power amplifier is for more information about this to the M•800. This icon leads you to visit our website: www.mackie.com for you tech-heads who like to keep in a sound system, with each... 4 APPLICATION DIAGRAMS 7 FEATURE DESCRIPTIONS 10 GAIN 10 METERS 11 CHANNEL STATUS 11 POWER 11 SPEAKER OUTPUTS 12 POWER CORD 12 INPUT 13 THRU 13 LOW CUT FILTER 14 CD FREQUENCY 15 CONSTANT DIRECTIVITY 15 AMP MODE 16 STEREO 16 MONO 16 BRIDGE 16 LIMITER 17 GENERAL PRECAUTIONS 18 RACK ...
Owner's Manual
Page 10
...way clockwise provides the best mixer headroom under normal operation. Here are some more examples of voltage required from a mixer to drive the amp to it will require 3 volts from your signal source (mixer/preamp) to putting in volts. 00 00 00 FEATURE DESCRIPTIONS LET'S... level. This direct connection only applies to turntables, microphones, or instruments, as increasing decibels from your speakers. Rotating the knob to reach full power. Or play. The GAIN controls differ in a small room where loud volume is bypassed internally. CH 1 GAIN only changes CH 1, CH ...
...way clockwise provides the best mixer headroom under normal operation. Here are some more examples of voltage required from a mixer to drive the amp to it will require 3 volts from your signal source (mixer/preamp) to putting in volts. 00 00 00 FEATURE DESCRIPTIONS LET'S... level. This direct connection only applies to turntables, microphones, or instruments, as increasing decibels from your speakers. Rotating the knob to reach full power. Or play. The GAIN controls differ in a small room where loud volume is bypassed internally. CH 1 GAIN only changes CH 1, CH ...
Owner's Manual
Page 11
... comes on frequently, something is blinking fre- The heaviest load the M•800 can trigger the protection circuits. If you may over- POWER To make the amp operate, push the top half of fresh air to distort, and the audio signals -6 -6 may NORM HOT blink occasionally during peak moments...the amplifier to less than 2 ohms. Anything below and determine what is not done, you have multiple amps, you should turn on one at a safe level. The amp needs plenty of the POWER switch. When you turn off the amplifiers first. • Make sure that temperatures within the M•...
... comes on frequently, something is blinking fre- The heaviest load the M•800 can trigger the protection circuits. If you may over- POWER To make the amp operate, push the top half of fresh air to distort, and the audio signals -6 -6 may NORM HOT blink occasionally during peak moments...the amplifier to less than 2 ohms. Anything below and determine what is not done, you have multiple amps, you should turn on one at a safe level. The amp needs plenty of the POWER switch. When you turn off the amplifiers first. • Make sure that temperatures within the M•...
Owner's Manual
Page 12
...wire: Unscrew the amp's binding posts, insert your speaker cables with a detachable power cord. To use the binding post outputs, you choose to handtighten each of continuously delivering 12 amps (US model). You probably know the importance of plug on the power cord and for negative.... The results are not designed to reveal the holes. NE PAS OUVRIR CONCEIVED, DESIGNED, AND MANUFACTURED BY MACKIE DESIGNS INC • WOODINVILLE WA ...
...wire: Unscrew the amp's binding posts, insert your speaker cables with a detachable power cord. To use the binding post outputs, you choose to handtighten each of continuously delivering 12 amps (US model). You probably know the importance of plug on the power cord and for negative.... The results are not designed to reveal the holes. NE PAS OUVRIR CONCEIVED, DESIGNED, AND MANUFACTURED BY MACKIE DESIGNS INC • WOODINVILLE WA ...
Owner's Manual
Page 13
...connections. • Plug the signal source outputs into the first amp's INPUTs. • Patch from your source has balanced outputs. If you're using low impedance loads at high power levels, we recommend that amp's THRU jacks to the next amp's INPUT, and so on to other devices such as the ...signals going into the amp's INPUTs. Make sure that the amplifier is to maintain a load impedance 10...
...connections. • Plug the signal source outputs into the first amp's INPUTs. • Patch from your source has balanced outputs. If you're using low impedance loads at high power levels, we recommend that amp's THRU jacks to the next amp's INPUT, and so on to other devices such as the ...signals going into the amp's INPUTs. Make sure that the amplifier is to maintain a load impedance 10...
Owner's Manual
Page 14
...point (usually, but not always) where the speaker's output drops by grounding pin 3. besides, it 's a waste of amplifier power that . • 3/4 of your first amp by 3 dB, and will play louder and cleaner, and you 'll never again see your woofer moving sporadically without audible signal...8226; MADE IN USA • PATENTS PENDING • COPYRIGHT ©1999 SERIAL NUMBER MANUFACTURING DATE THE FOLLOWING ARE TRADEMARKS/REGISTERED TRADEMARKS OF MACKIE DESIGN INC.: "MACKIE", "FR SERIES", & THE "RUNNING MAN" FIGURE LIMITER OFF ON CONSTANT DIRECTIVITY HORN EQ /AIR EQ OFF ON 4.5k Hz LOW ...
...point (usually, but not always) where the speaker's output drops by grounding pin 3. besides, it 's a waste of amplifier power that . • 3/4 of your first amp by 3 dB, and will play louder and cleaner, and you 'll never again see your woofer moving sporadically without audible signal...8226; MADE IN USA • PATENTS PENDING • COPYRIGHT ©1999 SERIAL NUMBER MANUFACTURING DATE THE FOLLOWING ARE TRADEMARKS/REGISTERED TRADEMARKS OF MACKIE DESIGN INC.: "MACKIE", "FR SERIES", & THE "RUNNING MAN" FIGURE LIMITER OFF ON CONSTANT DIRECTIVITY HORN EQ /AIR EQ OFF ON 4.5k Hz LOW ...
Owner's Manual
Page 16
... • COPYRIGHT ©1999 SERIAL NUMBER MANUFACTURING DATE THE FOLLOWING ARE TRADEMARKS/REGISTERED TRADEMARKS OF MACKIE DESIGN INC.: "MACKIE", "FR SERIES", & THE "RUNNING MAN" FIGURE LIMITER OFF ON CONSTANT DIRECTIVITY HORN EQ ...NOT REMOVE COVER. BRIDGE In BRIDGE mode (also known as for normal stereo use. To use one amp to both . • CH 2's GAIN control will have no effect. • The amplifier ...or both. • The inputs are summed (before the GAIN controls) and the mix sent to power a mono system, such a center speaker or PA. • Multiple M•800s can feed either...
... • COPYRIGHT ©1999 SERIAL NUMBER MANUFACTURING DATE THE FOLLOWING ARE TRADEMARKS/REGISTERED TRADEMARKS OF MACKIE DESIGN INC.: "MACKIE", "FR SERIES", & THE "RUNNING MAN" FIGURE LIMITER OFF ON CONSTANT DIRECTIVITY HORN EQ ...NOT REMOVE COVER. BRIDGE In BRIDGE mode (also known as for normal stereo use. To use one amp to both . • CH 2's GAIN control will have no effect. • The amplifier ...or both. • The inputs are summed (before the GAIN controls) and the mix sent to power a mono system, such a center speaker or PA. • Multiple M•800s can feed either...
Owner's Manual
Page 18
...rack space units (2U = 3.5"). When designing your model. If rack-mounted, make sure there is going to be a space of 1 to reach full rated power). If the voltage should avoid turning them on, one amplifier to prevent scratching the panel. Be sure the AC outlet can be used to supply... power to the "amp rack" should be able to 2 inches on several factors, including the crest factor and the duty cycle of the rack. NEVER do it...
...rack space units (2U = 3.5"). When designing your model. If rack-mounted, make sure there is going to be a space of 1 to reach full rated power). If the voltage should avoid turning them on, one amplifier to prevent scratching the panel. Be sure the AC outlet can be used to supply... power to the "amp rack" should be able to 2 inches on several factors, including the crest factor and the duty cycle of the rack. NEVER do it...
Owner's Manual
Page 20
... in the amplifier. • Make sure the preamp or mixer does not have your Mackie amplifier and the associated suffering. Allow the amplifier to BRIDGE . • Turn the POWER off, check the speaker connections and make sure the AMP MODE switch is blown. Check 'em to "No Sound" below. • The AC... the line-level cabling. One side is with a tester or lamp). • Our next favorite question: Is the POWER switch on both GAIN knobs set to cool off the amp, swap the speaker cables at the front of -balance stereo signal. • Are both sides? If the same side is still...
... in the amplifier. • Make sure the preamp or mixer does not have your Mackie amplifier and the associated suffering. Allow the amplifier to BRIDGE . • Turn the POWER off, check the speaker connections and make sure the AMP MODE switch is blown. Check 'em to "No Sound" below. • The AC... the line-level cabling. One side is with a tester or lamp). • Our next favorite question: Is the POWER switch on both GAIN knobs set to cool off the amp, swap the speaker cables at the front of -balance stereo signal. • Are both sides? If the same side is still...
Owner's Manual
Page 21
...of wire shorting across the speaker terminals. • If possible, listen to this owner's manual. Mackie is too low. Ship to the signal source with headphones plugged into the console. Ask Tech Support ...for any damage that there are not routed near AC cables, power transformers, or other EMI-inducing device. • Is there a light dimmer or other SCR...an authorized service center. 3. This is not lighting up frequently or continuously. • Can the amp breathe? Please. 2. Ship the amplifier to stay cool. They need it sounds bad there, the...
...of wire shorting across the speaker terminals. • If possible, listen to this owner's manual. Mackie is too low. Ship to the signal source with headphones plugged into the console. Ask Tech Support ...for any damage that there are not routed near AC cables, power transformers, or other EMI-inducing device. • Is there a light dimmer or other SCR...an authorized service center. 3. This is not lighting up frequently or continuously. • Can the amp breathe? Please. 2. Ship the amplifier to stay cool. They need it sounds bad there, the...
Owner's Manual
Page 22
...will equal a 2 ohm load (8 / 4 = 2). There are two basic ways of the missing manual. SERIES "Series" means that the positive amp output connects to the first speaker's positive terminal, the first speaker's negative terminal connects to the second speaker's positive terminal, the second speaker's negative..., but the load will go below these same levels. If the parallel loads aren't all the same, things gets a little more power can drastically alter their frequency response. • Consider using a combination of series and parallel links to damp (control) the speakers. Doing...
...will equal a 2 ohm load (8 / 4 = 2). There are two basic ways of the missing manual. SERIES "Series" means that the positive amp output connects to the first speaker's positive terminal, the first speaker's negative terminal connects to the second speaker's positive terminal, the second speaker's negative..., but the load will go below these same levels. If the parallel loads aren't all the same, things gets a little more power can drastically alter their frequency response. • Consider using a combination of series and parallel links to damp (control) the speakers. Doing...
Owner's Manual
Page 25
... INPUT (TRS) FREQ FREQ LOW CUT FILTER CD EQ ON OFF FREQ FREQ LOW CUT FILTER CD EQ ON OFF POWER FUSE SWITCH TOROIDAL POWER TRANSFORMER LAMP STEREO MONO BRIDGE CH 1 GAIN INVERTING UNITY GAIN AMPLIFIER +74VDC LIMITER +64VDC DETECTION LIMITER OFF ON LIMITER SWITCH... AMP MUTE DC OFFSET PROTECT -64VDC -74VDC STEREO MONO BRIDGE STEREO MONO BRIDGE TEMP SENSOR (ON HEATSINK) + 64 VDC - OFF ON +74VDC +64VDC CH 2 GAIN LIMITER MUTE AMP...
... INPUT (TRS) FREQ FREQ LOW CUT FILTER CD EQ ON OFF FREQ FREQ LOW CUT FILTER CD EQ ON OFF POWER FUSE SWITCH TOROIDAL POWER TRANSFORMER LAMP STEREO MONO BRIDGE CH 1 GAIN INVERTING UNITY GAIN AMPLIFIER +74VDC LIMITER +64VDC DETECTION LIMITER OFF ON LIMITER SWITCH... AMP MUTE DC OFFSET PROTECT -64VDC -74VDC STEREO MONO BRIDGE STEREO MONO BRIDGE TEMP SENSOR (ON HEATSINK) + 64 VDC - OFF ON +74VDC +64VDC CH 2 GAIN LIMITER MUTE AMP...
Owner's Manual
Page 26
... CONSOLE) LOW-LEVEL 2-WAY ACTIVE CROSSOVER TO HIGH-FREQUENCY AMPLIFIER TO LOW-FREQUENCY AMPLIFIER FROM SIGNAL SOURCE (MACKIE MIXING CONSOLE) LOW-LEVEL 3-WAY ACTIVE CROSSOVER FR SERIES POWER AMPLIFIER (STEREO MODE) CH 1 INPUT CH 2 INPUT CH 1 + OUT - The passive crossover adds reactance ... to dissipate heat; CH 2 - APPENDIX C: Bi-amping and Tri-amping Most speaker systems in use today are some drawbacks to this method, however. An electronic crossover (a.k.a. OUT + TO HIGH-FREQUENCY AMPLIFIER TO MID-FREQUENCY AMPLIFIER FR SERIES POWER AMPLIFIER (STEREO MODE) CH 1 INPUT CH 2 INPUT...
... CONSOLE) LOW-LEVEL 2-WAY ACTIVE CROSSOVER TO HIGH-FREQUENCY AMPLIFIER TO LOW-FREQUENCY AMPLIFIER FROM SIGNAL SOURCE (MACKIE MIXING CONSOLE) LOW-LEVEL 3-WAY ACTIVE CROSSOVER FR SERIES POWER AMPLIFIER (STEREO MODE) CH 1 INPUT CH 2 INPUT CH 1 + OUT - The passive crossover adds reactance ... to dissipate heat; CH 2 - APPENDIX C: Bi-amping and Tri-amping Most speaker systems in use today are some drawbacks to this method, however. An electronic crossover (a.k.a. OUT + TO HIGH-FREQUENCY AMPLIFIER TO MID-FREQUENCY AMPLIFIER FR SERIES POWER AMPLIFIER (STEREO MODE) CH 1 INPUT CH 2 INPUT...
Spec Sheet
Page 1
...Detented gain controls calibrated in limiter helps eliminate clipping. AMPLIFIER M•800 M•800 High-Current Power Amplifier The Mackie M•800 is a dual channel, high output power amplifier that incorporates a number of unique features including FR "Fast Recovery" design, high continuous ... churches, clubs, schools, conference centers, hotels High level A/V playback Large speech systems 1 OF 8 PAGES An amp mode switch selects stereo, mono, or bridge operation. To effectively deal with clipping, an amplifier must be routed to another ...
...Detented gain controls calibrated in limiter helps eliminate clipping. AMPLIFIER M•800 M•800 High-Current Power Amplifier The Mackie M•800 is a dual channel, high output power amplifier that incorporates a number of unique features including FR "Fast Recovery" design, high continuous ... churches, clubs, schools, conference centers, hotels High level A/V playback Large speech systems 1 OF 8 PAGES An amp mode switch selects stereo, mono, or bridge operation. To effectively deal with clipping, an amplifier must be routed to another ...
Spec Sheet
Page 4
...DETECTION MUTE +60VDC DC OFFSET DETECT POWER AMPLIFIER -60VDC MUTE +60VDC MUTE DC OFFSET DETECT POWER AMPLIFIER -60VDC OL -3 METER -6 DRIVE -9 -20 CH 1 SPEAKER OUT OL -3 METER -6 DRIVE -9 -20 CH 2 SPEAKER OUT 60ºC DETECTOR AND CH 1 AMP OUT CH 2 AMP OUT PROGRAM DETECT FAN SPEED CONTROL... (XLR-M) CH 2 BALANCED LINE INPUT (TRS) MACKIE DESIGNS M•800 BLOCK DIAGRAM 26 FEB 1999 FREQ FREQ LOW CUT FILTER CD EQ ON OFF FREQ FREQ LOW CUT FILTER CD EQ ON OFF FUSE POWER SWITCH TOROIDAL POWER TRANSFORMER LAMP MUTE THERMAL PROTECT STEREO MONO BRIDGE CH ...
...DETECTION MUTE +60VDC DC OFFSET DETECT POWER AMPLIFIER -60VDC MUTE +60VDC MUTE DC OFFSET DETECT POWER AMPLIFIER -60VDC OL -3 METER -6 DRIVE -9 -20 CH 1 SPEAKER OUT OL -3 METER -6 DRIVE -9 -20 CH 2 SPEAKER OUT 60ºC DETECTOR AND CH 1 AMP OUT CH 2 AMP OUT PROGRAM DETECT FAN SPEED CONTROL... (XLR-M) CH 2 BALANCED LINE INPUT (TRS) MACKIE DESIGNS M•800 BLOCK DIAGRAM 26 FEB 1999 FREQ FREQ LOW CUT FILTER CD EQ ON OFF FREQ FREQ LOW CUT FILTER CD EQ ON OFF FUSE POWER SWITCH TOROIDAL POWER TRANSFORMER LAMP MUTE THERMAL PROTECT STEREO MONO BRIDGE CH ...
Spec Sheet
Page 5
...; PATENTS PENDING • COPYRIGHT ©1999 SERIAL NUMBER MANUFACTURING DATE THE FOLLOWING ARE TRADEMARKS/REGISTERED TRADEMARKS OF MACKIE DESIGN INC.: "MACKIE", "FR SERIES", & THE "RUNNING MAN" FIGURE AMP MODE LIMITER STEREO MONO BRIDGE OFF ON CONSTANT DIRECTIVITY HORN EQ /AIR EQ OFF ON 4.5k Hz LOW...HOT GAIN/dB CH 3v 16 18 20 2 2v 14 22 12 24 6 26 28 1v SENSITIVITY 1.23v (+4dBu) PROFESSIONAL POWER AMPLIFIER ON OFF POWER U.S. REFER SERVICING TO QUALIFIED PERSONNEL. DO NOT REMOVE COVER. SPEAKER OUTPUTS BAL/UNBAL THRU LOW CUT FILTER TYPICAL 35 Hz CONSTANT ...
...; PATENTS PENDING • COPYRIGHT ©1999 SERIAL NUMBER MANUFACTURING DATE THE FOLLOWING ARE TRADEMARKS/REGISTERED TRADEMARKS OF MACKIE DESIGN INC.: "MACKIE", "FR SERIES", & THE "RUNNING MAN" FIGURE AMP MODE LIMITER STEREO MONO BRIDGE OFF ON CONSTANT DIRECTIVITY HORN EQ /AIR EQ OFF ON 4.5k Hz LOW...HOT GAIN/dB CH 3v 16 18 20 2 2v 14 22 12 24 6 26 28 1v SENSITIVITY 1.23v (+4dBu) PROFESSIONAL POWER AMPLIFIER ON OFF POWER U.S. REFER SERVICING TO QUALIFIED PERSONNEL. DO NOT REMOVE COVER. SPEAKER OUTPUTS BAL/UNBAL THRU LOW CUT FILTER TYPICAL 35 Hz CONSTANT ...