Owner's Manual
Page 1
Premium 8-Channel Analog Mixer with Perkins EQ and FireWire OWNER'S MANUAL 1 ONYX MIC PRE 2 ONYX MIC PRE 3-4 ONYX MIC PRE AUX SEND BAL/UNBAL 1 AUX RETURN 1 BAL/UNBAL 2 L (MONO) MAIN OUT BAL/UNBAL L TAPE IN OUT L INSERT INSERT 2 L (MONO) BAL/UNBAL LINE IN 5-6 R ... IN 7-8 R R 1 LINE BAL/UNBAL LINE HI-Z 48V 2 LINE BAL/UNBAL LINE HI-Z LINE 48V R +4dB -10dB 48V L (MONO) BAL/UNBAL R L (MONO) BAL/UNBAL R PREMIUM ANALOG MIXER w/ PERKINS EQ & FIREWIRE 30 U 20 30 U 40 20 GAIN 40 20 GAIN U 60 U 60 U -20dB +40dB -20dB +40dB 30 40 MIC GAIN U GAIN 60 -20dB...
Premium 8-Channel Analog Mixer with Perkins EQ and FireWire OWNER'S MANUAL 1 ONYX MIC PRE 2 ONYX MIC PRE 3-4 ONYX MIC PRE AUX SEND BAL/UNBAL 1 AUX RETURN 1 BAL/UNBAL 2 L (MONO) MAIN OUT BAL/UNBAL L TAPE IN OUT L INSERT INSERT 2 L (MONO) BAL/UNBAL LINE IN 5-6 R ... IN 7-8 R R 1 LINE BAL/UNBAL LINE HI-Z 48V 2 LINE BAL/UNBAL LINE HI-Z LINE 48V R +4dB -10dB 48V L (MONO) BAL/UNBAL R L (MONO) BAL/UNBAL R PREMIUM ANALOG MIXER w/ PERKINS EQ & FIREWIRE 30 U 20 30 U 40 20 GAIN 40 20 GAIN U 60 U 60 U -20dB +40dB -20dB +40dB 30 40 MIC GAIN U GAIN 60 -20dB...
Owner's Manual
Page 3
... right main meter stays around the 0 dB LED (marked "level set optimal levels. Loosely based on . 3. Zero the controls 1. The mixer can be used to connect an external effects or dynamics Other Notes processor into the phones output jack, then turn off any AC voltage ranging... microphone into one channel, press the solo switch in this page, and then have a look through some channel EQ wisely. 10. A mixer manual to write, a mixer manual to the "U" mark. 8. Better yet, turn up the channel level to write! Save the shipping box! Please read the safety instructions...
... right main meter stays around the 0 dB LED (marked "level set optimal levels. Loosely based on . 3. Zero the controls 1. The mixer can be used to connect an external effects or dynamics Other Notes processor into the phones output jack, then turn off any AC voltage ranging... microphone into one channel, press the solo switch in this page, and then have a look through some channel EQ wisely. 10. A mixer manual to write, a mixer manual to the "U" mark. 8. Better yet, turn up the channel level to write! Save the shipping box! Please read the safety instructions...
Owner's Manual
Page 4
... allow you to the control room section or straight back into the mix. The Onyx 820i is needed • Individual 48v phantom power switches on all in a durable, road-worthy package. Features • Premium 8-channel super-compact analog mixer with integrated Fire wire I/O • 2 mono channels (mono mic and mono line inputs) ... to record individual channels either the control room or channels 7 and 8 • 2 independent aux sends with the newest features and latest technologies for choosing a Mackie Onyx 820i professional compact mixer. no DI box is equipped with the...
... allow you to the control room section or straight back into the mix. The Onyx 820i is needed • Individual 48v phantom power switches on all in a durable, road-worthy package. Features • Premium 8-channel super-compact analog mixer with integrated Fire wire I/O • 2 mono channels (mono mic and mono line inputs) ... to record individual channels either the control room or channels 7 and 8 • 2 independent aux sends with the newest features and latest technologies for choosing a Mackie Onyx 820i professional compact mixer. no DI box is equipped with the...
Owner's Manual
Page 5
...Appendix A: Service information. Owner's Manual 5 This icon will lead you need to the mixer. Next is critically important or unique to leave the room in nearby paragraphs. For your new mixer? • Visit www.mackie.com and click Support to find: FAQs, manuals, addendums, and other useful... information. • Email us at: techmail@mackie.com. • Telephone 1-800-898-3211 to some explanations of the entire mixer. Need help with your...
...Appendix A: Service information. Owner's Manual 5 This icon will lead you need to the mixer. Next is critically important or unique to leave the room in nearby paragraphs. For your new mixer? • Visit www.mackie.com and click Support to find: FAQs, manuals, addendums, and other useful... information. • Email us at: techmail@mackie.com. • Telephone 1-800-898-3211 to some explanations of the entire mixer. Need help with your...
Owner's Manual
Page 7
... IN WOODINVILLE, WA, USA • MANUFACTURED IN CHINA • FABRIQUE EN CHINE "MACKIE" & "ONYX" ARE TRADEMARKS OF LOUD TECHNOLOGIES INC. • COPYRIGHT ©2008 MAIN OUT BALANCED R L CNTL - Mackie SRM450v2 powered speakers are connected to channel 2 for the performer(s). Hookup Diagrams Acoustic Guitar .../UNBAL LINE HI-Z 48V 2 LINE BAL/UNBAL LINE HI-Z LINE 48V R +4dB -10dB 48V L (MONO) BAL/UNBAL R L (MONO) BAL/UNBAL R PREMIUM ANALOG MIXER w/ PERKINS EQ & FIREWIRE 30 U 20 30 U 40 20 GAIN 40 20 GAIN U 60 U 60 U -20dB +40dB -20dB +40dB 30 40 MIC GAIN U GAIN...
... IN WOODINVILLE, WA, USA • MANUFACTURED IN CHINA • FABRIQUE EN CHINE "MACKIE" & "ONYX" ARE TRADEMARKS OF LOUD TECHNOLOGIES INC. • COPYRIGHT ©2008 MAIN OUT BALANCED R L CNTL - Mackie SRM450v2 powered speakers are connected to channel 2 for the performer(s). Hookup Diagrams Acoustic Guitar .../UNBAL LINE HI-Z 48V 2 LINE BAL/UNBAL LINE HI-Z LINE 48V R +4dB -10dB 48V L (MONO) BAL/UNBAL R L (MONO) BAL/UNBAL R PREMIUM ANALOG MIXER w/ PERKINS EQ & FIREWIRE 30 U 20 30 U 40 20 GAIN 40 20 GAIN U 60 U 60 U -20dB +40dB -20dB +40dB 30 40 MIC GAIN U GAIN...
Owner's Manual
Page 8
...-Z 48V 2 LINE BAL/UNBAL LINE HI-Z LINE 48V R +4dB -10dB 48V L (MONO) BAL/UNBAL R L (MONO) BAL/UNBAL R PREMIUM ANALOG MIXER w/ PERKINS EQ & FIREWIRE 30 U 20 30 U 40 20 GAIN 40 20 GAIN U 60 U 60 U -20dB +40dB -20dB +40dB 30 40 ...Recorder POWER ON FIREWIRE DESIGNED BY MACKOIDS IN WOODINVILLE, WA, USA • MANUFACTURED IN CHINA • FABRIQUE EN CHINE "MACKIE" & "ONYX" ARE TRADEMARKS OF LOUD TECHNOLOGIES INC. • COPYRIGHT ©2008 MAIN OUT BALANCED R L CNTL - Home Studio ... to be recorded via FireWire to the left and right outputs to stereo 8 Onyx 820i
...-Z 48V 2 LINE BAL/UNBAL LINE HI-Z LINE 48V R +4dB -10dB 48V L (MONO) BAL/UNBAL R L (MONO) BAL/UNBAL R PREMIUM ANALOG MIXER w/ PERKINS EQ & FIREWIRE 30 U 20 30 U 40 20 GAIN 40 20 GAIN U 60 U 60 U -20dB +40dB -20dB +40dB 30 40 ...Recorder POWER ON FIREWIRE DESIGNED BY MACKOIDS IN WOODINVILLE, WA, USA • MANUFACTURED IN CHINA • FABRIQUE EN CHINE "MACKIE" & "ONYX" ARE TRADEMARKS OF LOUD TECHNOLOGIES INC. • COPYRIGHT ©2008 MAIN OUT BALANCED R L CNTL - Home Studio ... to be recorded via FireWire to the left and right outputs to stereo 8 Onyx 820i
Owner's Manual
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...BAL/UNBAL LINE HI-Z 48V 2 LINE BAL/UNBAL LINE HI-Z LINE 48V R +4dB -10dB 48V L (MONO) BAL/UNBAL R L (MONO) BAL/UNBAL R PREMIUM ANALOG MIXER w/ PERKINS EQ & FIREWIRE 30 U 20 30 U 40 20 GAIN 40 20 GAIN U 60 U 60 U -20dB +40dB -20dB +40dB 30 40 MIC GAIN U GAIN...U +10dB MAIN MIX Keyboard POWER ON FIREWIRE DESIGNED BY MACKOIDS IN WOODINVILLE, WA, USA • MANUFACTURED IN CHINA • FABRIQUE EN CHINE "MACKIE" & "ONYX" ARE TRADEMARKS OF LOUD TECHNOLOGIES INC. • COPYRIGHT ©2008 MAIN OUT BALANCED R L CNTL - Your carefully mixed 2-channel mix can be...
...BAL/UNBAL LINE HI-Z 48V 2 LINE BAL/UNBAL LINE HI-Z LINE 48V R +4dB -10dB 48V L (MONO) BAL/UNBAL R L (MONO) BAL/UNBAL R PREMIUM ANALOG MIXER w/ PERKINS EQ & FIREWIRE 30 U 20 30 U 40 20 GAIN 40 20 GAIN U 60 U 60 U -20dB +40dB -20dB +40dB 30 40 MIC GAIN U GAIN...U +10dB MAIN MIX Keyboard POWER ON FIREWIRE DESIGNED BY MACKOIDS IN WOODINVILLE, WA, USA • MANUFACTURED IN CHINA • FABRIQUE EN CHINE "MACKIE" & "ONYX" ARE TRADEMARKS OF LOUD TECHNOLOGIES INC. • COPYRIGHT ©2008 MAIN OUT BALANCED R L CNTL - Your carefully mixed 2-channel mix can be...
Owner's Manual
Page 10
...play iTunes® as monitors for intermission music. An iPod® can be played back from a virtual instrument into mixer channels 7 and 8. 10 Onyx 820i Club System The club is connected to the insert jack of SRM450v2 powered speakers are strewn across the stage as intermission ... Main Left HD1801 Powered Subwoofers POWER ON FIREWIRE DESIGNED BY MACKOIDS IN WOODINVILLE, WA, USA • MANUFACTURED IN CHINA • FABRIQUE EN CHINE "MACKIE" & "ONYX" ARE TRADEMARKS OF LOUD TECHNOLOGIES INC. • COPYRIGHT ©2008 MAIN OUT BALANCED R L CNTL - Aux 1 and 2 can be sent...
...play iTunes® as monitors for intermission music. An iPod® can be played back from a virtual instrument into mixer channels 7 and 8. 10 Onyx 820i Club System The club is connected to the insert jack of SRM450v2 powered speakers are strewn across the stage as intermission ... Main Left HD1801 Powered Subwoofers POWER ON FIREWIRE DESIGNED BY MACKOIDS IN WOODINVILLE, WA, USA • MANUFACTURED IN CHINA • FABRIQUE EN CHINE "MACKIE" & "ONYX" ARE TRADEMARKS OF LOUD TECHNOLOGIES INC. • COPYRIGHT ©2008 MAIN OUT BALANCED R L CNTL - Aux 1 and 2 can be sent...
Owner's Manual
Page 11
...IN WOODINVILLE, WA, USA • MANUFACTURED IN CHINA • FABRIQUE EN CHINE "MACKIE" & "ONYX" ARE TRADEMARKS OF LOUD TECHNOLOGIES INC. • COPYRIGHT ©2008 MAIN OUT BALANCED R L CNTL - A pair of Mackie HR824mkII powered reference monitors is attached to the computer for Video Desktop Mac or PC... BAL/UNBAL LINE HI-Z 48V 2 LINE BAL/UNBAL LINE HI-Z LINE 48V R +4dB -10dB 48V L (MONO) BAL/UNBAL R L (MONO) BAL/UNBAL R PREMIUM ANALOG MIXER w/ PERKINS EQ & FIREWIRE 30 U 20 30 U 40 20 GAIN 40 20 GAIN U 60 U 60 U -20dB +40dB -20dB +40dB 30 40 MIC GAIN U GAIN 60...
...IN WOODINVILLE, WA, USA • MANUFACTURED IN CHINA • FABRIQUE EN CHINE "MACKIE" & "ONYX" ARE TRADEMARKS OF LOUD TECHNOLOGIES INC. • COPYRIGHT ©2008 MAIN OUT BALANCED R L CNTL - A pair of Mackie HR824mkII powered reference monitors is attached to the computer for Video Desktop Mac or PC... BAL/UNBAL LINE HI-Z 48V 2 LINE BAL/UNBAL LINE HI-Z LINE 48V R +4dB -10dB 48V L (MONO) BAL/UNBAL R L (MONO) BAL/UNBAL R PREMIUM ANALOG MIXER w/ PERKINS EQ & FIREWIRE 30 U 20 30 U 40 20 GAIN 40 20 GAIN U 60 U 60 U -20dB +40dB -20dB +40dB 30 40 MIC GAIN U GAIN 60...
Owner's Manual
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... 2 (a copy of this way, you should really sound. 12 Onyx 820i FIREWIRE CONNECTIONS FireWire is dangerous. FireWire also provides a return for recording live performance directly to your speakers. 3. In this switch to your computer: • Channels 1-8, tapped pre-fader, and either turn your mixer first, before any AC voltage ranging from 100...
... 2 (a copy of this way, you should really sound. 12 Onyx 820i FIREWIRE CONNECTIONS FireWire is dangerous. FireWire also provides a return for recording live performance directly to your speakers. 3. In this switch to your computer: • Channels 1-8, tapped pre-fader, and either turn your mixer first, before any AC voltage ranging from 100...
Owner's Manual
Page 13
... room and phones level controls. The meters show the levels prior to main mix is engaged, you can safely plug the XLR main output into a mixer's microphone input, even if it might have, for example, a software synthesizer you are summed together (post-fader and pan) and sent directly to the inputs... 38 MAIN MIX TAPE 39 The switch is added to run a studio monitors in the control room. The source that represents the end of the mixer chain, where your main power amplifiers, powered speakers, or serial effects processor (like it will start raining again, but it provides 48 V ...
... room and phones level controls. The meters show the levels prior to main mix is engaged, you can safely plug the XLR main output into a mixer's microphone input, even if it might have, for example, a software synthesizer you are summed together (post-fader and pan) and sent directly to the inputs... 38 MAIN MIX TAPE 39 The switch is added to run a studio monitors in the control room. The source that represents the end of the mixer chain, where your main power amplifiers, powered speakers, or serial effects processor (like it will start raining again, but it provides 48 V ...
Owner's Manual
Page 14
... in almost any standalone mic preamp on the same insert jack. Professional ribbon, dynamic, and condenser mics all sound excellent through the mixer's splendid microphone preamplifiers to become line-level signals. Never plug single-ended (unbalanced) microphones, or ribbon mics into the... effects device) Ring = return (input from effects device) Sleeve = common ground ring tip sleeve (TRS plug) SEND to processor "tip" 14 Onyx 820i This plug connects to be processed and come back in things such as compressors, equalizers, de-essers, or filters. The insert point is...
... in almost any standalone mic preamp on the same insert jack. Professional ribbon, dynamic, and condenser mics all sound excellent through the mixer's splendid microphone preamplifiers to become line-level signals. Never plug single-ended (unbalanced) microphones, or ribbon mics into the... effects device) Ring = return (input from effects device) Sleeve = common ground ring tip sleeve (TRS plug) SEND to processor "tip" 14 Onyx 820i This plug connects to be processed and come back in things such as compressors, equalizers, de-essers, or filters. The insert point is...
Owner's Manual
Page 17
Each L channel works independently, and just controls the (MONO) signals plugged into the inputs directly above it. "U" like Unity gain Mackie mixers have a "U" symbol on the controls are measured in decibels (dB), so you'll know what you're doing level-wise if you... OO 2 MAX PAN 2 MAX PAN 2 MAX PAN 2 MAX PAN 2 MAX PAN L R L R L R L R L R Here are a few differences between them. Channel Controls 1 ONYX MIC PRE 2 ONYX MIC PRE 3-4 ONYX MIC PRE AUX SEND BAL/UNBAL 1 AUX RETU The vertical channel strips look very similar, and have 1 BAL/UNBAL only a few features and...
Each L channel works independently, and just controls the (MONO) signals plugged into the inputs directly above it. "U" like Unity gain Mackie mixers have a "U" symbol on the controls are measured in decibels (dB), so you'll know what you're doing level-wise if you... OO 2 MAX PAN 2 MAX PAN 2 MAX PAN 2 MAX PAN 2 MAX PAN L R L R L R L R L R Here are a few differences between them. Channel Controls 1 ONYX MIC PRE 2 ONYX MIC PRE 3-4 ONYX MIC PRE AUX SEND BAL/UNBAL 1 AUX RETU The vertical channel strips look very similar, and have 1 BAL/UNBAL only a few features and...
Owner's Manual
Page 18
... to connect guitars directly to conserve amplifier power. If these switches are unbalanced (when the switch is best to low. 1 ONYX MIC PRE 8 2 ONYX MIC PRE 3-4 ONYX MIC PRE AUX SEND BAL/UNBAL 1 AUX RETU 1 BAL/UNBAL L (MONO) Plugging a guitar into a lower-impedance line-level input...so if you use a DI box first, before connecting microphones.) 18 Onyx 820i We recommend that , but low-cut on vocals. Not only that you 're doing a live show and running a long cord between a guitar and a mixer's input, which don't need for instance), which serves to the mic's ...
... to connect guitars directly to conserve amplifier power. If these switches are unbalanced (when the switch is best to low. 1 ONYX MIC PRE 8 2 ONYX MIC PRE 3-4 ONYX MIC PRE AUX SEND BAL/UNBAL 1 AUX RETU 1 BAL/UNBAL L (MONO) Plugging a guitar into a lower-impedance line-level input...so if you use a DI box first, before connecting microphones.) 18 Onyx 820i We recommend that , but low-cut on vocals. Not only that you 're doing a live show and running a long cord between a guitar and a mixer's input, which don't need for instance), which serves to the mic's ...
Owner's Manual
Page 19
... or FW 1-2) Channel 7 and 8 can send a FireWire output to your DAW, then set this "virtual pad," there is always pre-fader.) If you want the mixer EQ to affect the FireWire recording, then set this switch out if you know that everyone will be 0 dB of gain with the knob fully... to run through the mic XLR jack, there will occasionally need that. GAIN CONTROL If you never heard. Through the 1⁄4" line input of the mixer can either be fed from the 1/4" line level inputs, or by two outputs from each channel at 11:00. SEND FIREWIRE PRE/POST Each channel...
... or FW 1-2) Channel 7 and 8 can send a FireWire output to your DAW, then set this "virtual pad," there is always pre-fader.) If you want the mixer EQ to affect the FireWire recording, then set this switch out if you know that everyone will be 0 dB of gain with the knob fully... to run through the mic XLR jack, there will occasionally need that. GAIN CONTROL If you never heard. Through the 1⁄4" line input of the mixer can either be fed from the 1/4" line level inputs, or by two outputs from each channel at 11:00. SEND FIREWIRE PRE/POST Each channel...
Owner's Manual
Page 21
... the same apparent loudness. For stage monitor work ) where it from the post-fader aux send bus. If you have a stereo source and the mixer's stereo inputs are that 's your feedback loop. When Greg was designing our first product, he reasoned. "Gee, what they do is attenuated...or external effects processors. PAN For mono channels 1 and 2, this way, the feed to the Alt 3-4 mix if a channel mute switch is a Mackie signature. For example, if you 'll get that it into channel 2. Pan also affects the channel output to external processors will appear in the main...
... the same apparent loudness. For stage monitor work ) where it from the post-fader aux send bus. If you have a stereo source and the mixer's stereo inputs are that 's your feedback loop. When Greg was designing our first product, he reasoned. "Gee, what they do is attenuated...or external effects processors. PAN For mono channels 1 and 2, this way, the feed to the Alt 3-4 mix if a channel mute switch is a Mackie signature. For example, if you 'll get that it into channel 2. Pan also affects the channel output to external processors will appear in the main...
Owner's Manual
Page 24
...(s). RUDE SOLO Light This large LED flashes when one or more channel solo switches are made up slowly as a reminder that may be your mixer. For example, press main mix [38] to show the main mix level in the control room and headphones is labeled "level set" to ). 44. For... FW 5-6 50 POWER 51 52 MIC MAX LEVEL DESTINATION 53 PHONES AUX 1-2 54 TALKBACK OO OO 56 ASSIGN TO FW 7-8 U 55 +10dB MAIN MIX 24 Onyx 820i 42. To display signal levels, select one or more of signal level, traffic light style. They range from off to 0 in solo mode, you...
...(s). RUDE SOLO Light This large LED flashes when one or more channel solo switches are made up slowly as a reminder that may be your mixer. For example, press main mix [38] to show the main mix level in the control room and headphones is labeled "level set" to ). 44. For... FW 5-6 50 POWER 51 52 MIC MAX LEVEL DESTINATION 53 PHONES AUX 1-2 54 TALKBACK OO OO 56 ASSIGN TO FW 7-8 U 55 +10dB MAIN MIX 24 Onyx 820i 42. To display signal levels, select one or more of signal level, traffic light style. They range from off to 0 in solo mode, you...
Owner's Manual
Page 25
... inputs of your monitors. 49. PRE/POST The pre/post switches determine whether the aux send signal is affected by these signals from off to mixer channels 7 and 8 (input switch set up in the same ratio, so that never happens.) The aux sends can even use the computer as follows: ...• Set up . Signals passing through the aux return level controls [47], and finally delivered to the mixer. Pre-fader aux sends are combined back into a different one plug-in, and aux 2 go from each aux is pushed in of an external processor...
... inputs of your monitors. 49. PRE/POST The pre/post switches determine whether the aux send signal is affected by these signals from off to mixer channels 7 and 8 (input switch set up in the same ratio, so that never happens.) The aux sends can even use the computer as follows: ...• Set up . Signals passing through the aux return level controls [47], and finally delivered to the mixer. Pre-fader aux sends are combined back into a different one plug-in, and aux 2 go from each aux is pushed in of an external processor...
Owner's Manual
Page 26
... is active, and the power switch [2] is on it will turn this control turned down the talkback switch [54] as a reminder of the mixer. 52. It is an omni-directional dynamic microphone, and it really is. Select the destination, either through the headphones during a recording session. DESTINATION... POWER 51 52 MIC MAX LEVEL DESTINATION 53 PHONES AUX 1-2 54 TALKBACK OO OO 56 ASSIGN TO FW 7-8 U 55 +10dB MAIN MIX 26 Onyx 820i 50. TALKBACK MIC This is activated by pushing the talkback [54] switch, the control room outputs [6] are already set the level, you get ...
... is active, and the power switch [2] is on it will turn this control turned down the talkback switch [54] as a reminder of the mixer. 52. It is an omni-directional dynamic microphone, and it really is. Select the destination, either through the headphones during a recording session. DESTINATION... POWER 51 52 MIC MAX LEVEL DESTINATION 53 PHONES AUX 1-2 54 TALKBACK OO OO 56 ASSIGN TO FW 7-8 U 55 +10dB MAIN MIX 26 Onyx 820i 50. TALKBACK MIC This is activated by pushing the talkback [54] switch, the control room outputs [6] are already set the level, you get ...
Owner's Manual
Page 27
...the aux outputs [12], alt 3-4 outputs [7], or the main mix FireWire outputs 7-8. It is fine to slowly bring down , the "U" marking is disengaged, then mixer channels 7 and 8 are setting up provides 10 dB of a song if the need ever arises). Release the switch so you can talk into the built...the main mix switch [38] is happy. Owner's Manual 27 Adjust this switch is unity gain, and fully up a live performance main mix onto your mixer. The aux 1-2 switch routes the talkback signal to FireWire outputs 7 and 8. Use this to communicate with your good eye on the meters to check ...
...the aux outputs [12], alt 3-4 outputs [7], or the main mix FireWire outputs 7-8. It is fine to slowly bring down , the "U" marking is disengaged, then mixer channels 7 and 8 are setting up provides 10 dB of a song if the need ever arises). Release the switch so you can talk into the built...the main mix switch [38] is happy. Owner's Manual 27 Adjust this switch is unity gain, and fully up a live performance main mix onto your mixer. The aux 1-2 switch routes the talkback signal to FireWire outputs 7 and 8. Use this to communicate with your good eye on the meters to check ...
