Phonic AM442D USB, AM642D USB User’s Manual

AM642D USB

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AM442D USB AM642D USB

User's Manual

Benutzerhandbuch

Manual del Usuario

Mode d'emploi

Manual do Usuário

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AM442D USB AM642D USB

COMPACT MIXERS MEZCLADORAS COMPACTAS

ENGLISH	......................................I
ESPAÑOL ......................................	II
......................................	III

V1.0 08/29/2011

USER'S MANUAL
CONTENTS
I N T R O D U C T I O N . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	1
S Y S T E M R E Q U I R E M E N T S . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	1
GETTING STARTED ................................................................	1
CHANNEL SETUP....................................................................	1
C O M P U T E R C O N N E C T I O N . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	1
M A K I N G C O N N E C T I O N S . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	2
C O N T R O L S A N D S E T T I N G S . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	3
SPECIFICATIONS ...................................................................	7
APPENDIX
DIGITAL EFFECT TABLE .........................................................	1
APPLICATION .........................................................................	2
DIMENSIONS..........................................................................	4
BLOCK DIAGRAMS .................................................................	5

Phonic preserves the right to improve or alter any information within this document without prior notice.

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IMPORTANT SAFETY INSTRUCTIONS

The apparatus shall not be exposed to dripping or splashing and that no objects				with liquids, such as vases,

shall be placed on the apparatus. The MAINS plug is used as the disconnect device, the disconnect device shall remain readily operable.

Warning: the user shall not place this apparatus in the area during the operation so that the mains switch can be easily accessible.

1.Read these instructions before operating this apparatus.

2.Keep these instructions for future reference.

3.Heed all warnings to ensure safe operation.

4.Follow all instructions provided in this document.

5.Do not use this apparatus near water or in locations where condensation may occur.

6.Clean only with dry cloth. Do not use aerosol or liquid cleaners. Unplug this apparatus before cleaning.

7.Do not block any of the ventilation openings. Install in accordance with the manufacturer’s instructions.

8.Do not install near any heat sources such as radiators, heat registers, stoves, or other apparatus (including .

9.Do not defeat the safety purpose of the polarized or grounding-type plug. A polarized plug has two blades with one wider than the other. A grounding type plug has two blades and a third grounding prong. The wide blade or the third prong is provided for your safety. If

the provided plug does notinto your outlet, consult an electrician for replacement of the obsolete outlet.

10.Protect the power cord from being walked on or pinched particularly at plug, convenience receptacles, and the point where they exit from the apparatus.

11.Only use attachments/accessories by the manufacturer.

12.Use only with a cart, stand, tripod, bracket, or

table by the manufacturer, or sold with the apparatus. When a cart is used, use caution when moving the cart/apparatus

combination to avoid injury from tipover.

13.Unplug this apparatus during lighting storms or when unused for long periods of time.

14.Refer all servicing to service personnel. Servicing is required when the apparatus has been damaged in any way, such as power-supply cord or plug is damaged, liquid has been spilled or objects have fallen into the apparatus, the apparatus has been exposed to rain or moisture, does not operate normally, or has been dropped.

CAUTION

RISK OF ELECTRIC SHOCK

DO NOT OPEN

CAUTION: TO REDUCE THE RISK OF ELECTRIC SHOCK,

DO NOT REMOVE COVER (OR BACK)

NO USER SERVICEABLE PARTS INSIDE

REFER SERVICING TO QUALIFIED PERSONNEL

The lightning flash with arrowhead symbol, within an equilateral triangle, is intended to alert the user to the presence of uninsulated “dangerous voltage” within the product’

magnitude to constitute a risk of electric shock to persons.

The exclamation point within an equilateral triangle is intended to alert the user to the presence of important operating and maintenance (servicing) instructions in the literature accompanying the appliance.

WARNING: To reduce the risk of or electric shock, do not expose this apparatus to rain or moisture.

CAUTION: Use of controls or adjustments or performance of procedures other than those may result in hazardous radiation exposure.

Introduction

Thank you for choosing one of Phonic’s many quality compact mixers. The AM442D USB and AM642D USB mixers – designed by the ingenious engineers that have created a variety of mixers fantastic in style and performance in the past – display similar proficiency that previous Phonic products have shown; with more than a few refinements, of course. Featuring full gain ranges, amazingly low distortion levels, and incredibly wide dynamic ranges, these amazing mixers are bound to make a big impression in any venue. The AM442D USB and AM642USB also offer a USB interface for making stereo recordings on any modern Windowsor

Mac-based computer.

We know how eager you are to get started – wanting to get the mixer out and hook it all up is probably your number one priority right now – but before you do, we strongly urge you to take a look through this manual. Inside, you will find important facts and figures on the set up, use and applications of your brand new mixer. If you do happen to be one of the many people who flatly refuse to read user manuals, then we just urge you to at least glance at the Instant Setup section. After glancing at or reading through the manual (we applaud you if you do read the entire manual), please store it in a place that is easy for you to find, because chances are there’s something you missed the first time around.

System Requirements

Windows

Windows™ XP SP2, Vista™ or 7

Intel™ Pentium™ 4 processor or better

512 MB RAM (1 GB recommended)

Macintosh

Apple™ Mac™ OSX 10.5 or higher

G4™ processor or better

512 MB RAM (1 GB recommended)

Getting Started

1.Ensure all power is turned off on your mixer. To totally ensure this, the AC cable should not be connected to the unit.

2.All faders and level controls should be set at the lowest level and all channels switched off to ensure no sound is inadvertently sent through the outputs when the device is switched on. All levels can be altered to acceptable degrees after the device is turned on.

3.Plug all necessary instruments and equipment into the device’s various inputs as required. This may include line signal devices, such as keyboards and drum machines, as well as microphones and/or guitars, keyboards, etc.

4.Plug any necessary equipment into the device’s various outputs. This could include amplifiers and speakers, monitors, signal processors, and/or recording devices.

5.Plug the supplied AC cable into the AC inlet on the back of the device and a power outlet of a suitable voltage.

6.Turn the power switch on.

Channel Setup

1.To ensure the correct audio level of the input channel is selected, each of the Mixer’s Channel’s ON buttons should be disengaged (which should turn the corresponding LED indicator off – otherwise go back and try again), as well as the SOLO buttons on each channel.

2.Ensure the channel you wish to set has a signal sent to it similar to the signal that will be sent when in common use.

For example, if the channel has a microphone connected to it, then you should speak or sing at the same level the performer normally would during a performance; if a guitar is plugged into the channel, then the guitar should also be strummed as it normally would be (and so on). This ensures levels are completely accurate and avoids having to reset them later.

3.Move the Channel’s fader to around the 0 dB mark.

4.Pushing the channel’s SOLO button will send the audio signal to the Control Room / Phones mixing bus and the

Level Meter will display the Control Room’s signal properties (since the Main L/R mixing bus will receive no signal).

5.Set the gain so the level meter indicates the audio level is around 0 dB.

6.This channel is now ready to be used; you can stop making the audio signal.

7.You can now repeat the same process for other channels if you wish.

Computer Connection

By simply connecting the USB cable provided along with your

AM442D USB or AM642D USB to the device and your Personal Computer or Laptop, you are able to send CD quality (16-bit stereo, with a 44.1 kHz sampling rate) signal to and from your mixer. By doing this, you are actually turning your mixer into a highly useful plug’n’play soundcard for your computer.

The USB sends an audio stream of the Main Left and Right (record out) signal of your mixer to the computer. You can use almost any dedicated Digital Audio Workstation (DAW) software to record the signal from the AM mixer. You can also set the mixer as your default audio device.

The USB interface also returns the audio signal from your computer back to the 2T Returns, the signal of which is controlled by the 2T / USB Return control. If there are input signals from both the USB interface and the 2T Return, the two signals are combined and controlled simultaneously by the 2T return control.

Windows

1.Turn both the AM mixer and the computer on.

2.Connect the AM mixer to the computer via the provided USB cable.

3.Let Windows find the device and install an appropriate driver.

4.Enter the Control Panel and select Sounds and Audio Devices.

5.When here, go to the Audio tab and select the “USB Audio Codec” as your default sound recording and playback device.

6.Depending whether you have Windows XP, Vista or 7, this may differ slightly but the setting can always be found within the Control Panel’s audio menu.

7.If you don’t want to use the AM442D USB and AM642D

USB as your default audio device, you can simply enter your

DAW or other audio program and select it as your default device in the program only.

8.Be sure to set your minimum buffer settings to 64 samples as to avoid clicks and pops.

Mac

1.Turn both the mixer and the computer on.

2.Connect the AM mixer to the computer via the provided USB cable.

3.Enter the AUDIO MIDI SETUP menu.

4.Select the “USB Audio Codec” as your input and output device.

5.Either the AM442D USB or AM642D USB is now your default audio device.

6.Alternatively, enter your DAW software (or other relevant audio program) and select the “USB Audio Codec” in the device preferences.

7.Be sure to set your minimum buffer settings to 64 samples as to avoid clicks and pops.

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AM442D USB / AM642D USB

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Making Connections

Inputs and Outputs

1. XLR Microphone Jacks

These jacks accept typical 3-pin XLR

inputs for balanced and unbalanced signals. They can be used in

conjunction with microphones – such as professional condenser, dynamic

or ribbon microphones - with standard

XLR male connectors, and feature low noise preamplifiers, serving for crystal clear sound replication. The AM442D

USB mixer features five standard XLR microphone inputs, whereas the

AM642D USB features a total of eight.

NB. When these inputs are used with condenser microphones, the Phantom Power should be activated. However, when Phantom Power is engaged, single ended (unbalanced) microphones and instruments should not be used on the Mic inputs.

2. Stereo Channels

The AM442D USB and AM642D USB feature a few stereo channels, thrown in for maximum flexibility. Each of these stereo channels features two 1/4” phone jacks, for the addition of various line level input devices, such as electronic keyboards, guitars and external signal processors or mixers. If you wish to use a mono device on a stereo input, simply plug the device’s 1/4” phone jack into the left (mono) input and leave the right input bare. The signal will be duplicated to the right due to the miracle of jack normalizing.

3. AUX Sends

These 1/4” TS outputs may be used to connect to an external signal processor, or even to an amplifier and speakers (depending on your desired settings) from the mixer. The signal from the AUX Sends is controlled by the main AUX and EFX controls (on the face of the mixer), which obtain their signal from the AUX and EFX controls located on each channel strip. The AM442D USB features 2 AUX sends, whereas the AM642D USB features a total of 3.

4. AUX Returns

These 1/4” TS inputs are for the return of audio to the AM442D

USB and AM642D USB mixers, processed by an external signal processor. If really needed, they can also be used as additional inputs. The feed from these inputs can be adjusted using the

AUX Return controls on the face of the mixer. When connecting a monaural device to the AUX Return 1 and 2 inputs, simply plug a 1/4” phone jack into the left (mono) input, and the signal will appear in the right as well. This, however, does not work for the

AUX Return 3 input on the AM442D USB.

NB. When any device is plugged into the mixer’s corresponding EFX Return inputs (ie. AUX Return 2), the mixer’s internal digital effect engine is then disabled.

5. Foot Switch Jack

These ports are for the inclusion of a foot switch, used to remotely switch the built-in Digital Effect processor between the on and standby modes.

6. Phones

This stereo output port is suited for use with headphones, allowing monitoring of the mix. The audio level of this output is controlled using the Control Room / Phones control.

7. 2T Record / Record Out

These outputs will accommodate RCA cables, able to be fed to a variety of recording devices. Also included is a mini stereo jack for the addition of recording devices such as MD players, and even laptop computers.

8. 2T Return

These RCA inputs are used to connect the mixer with parallel external devices, such as sub mixers or external effect processors, receiving the processed signal from another source and feeding it to either the Main L and R or the Phones mixing bus.

9. Main Out

These two 1/4” phone jacks will output the final stereo line level signal sent from the main mixing bus. The primary purpose of these jacks is to send the main output to external devices, which may include power amplifiers (and in-turn, a pair of speakers), other mixers, as well as a wide range of other possible signal processors (Equalizers, Crossovers, etcetera).

AM442D USB / AM642D USB

Rear Panel

10. Line Inputs

These inputs accept typical 1/4” TRS balanced or TS unbalanced inputs, for balanced or unbalanced signals. There are various numbers of these inputs depending which mixer you are using.

They can be used in conjunction with a wide range of line level devices, such as keyboards, drum machines, electric guitars, and a variety of other instruments.

11. Channel Inserts

Located on the rear of the AM442D USB and AM642D USB, the primary use for these TRS

phone jacks is for the addition of external devices, such as dynamic processors or equalizers, to the mono input channels on both of these units. This includes channels

1 to 4 on the AM442D USB and

channels 1 to 6 of the AM642D USB. This will require a Y cord that can send (pre-fader and pre-EQ) and receive signals to and from an external processor.

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14. Main Out

These two XLR ports will output the final stereo line level signal sent from the main mixing bus. The primary purpose of these jacks is to send the main output to external devices, which may include power amplifiers (and in-turn, a pair of speakers), other mixers, as well as a wide range of other possible signal processors (equalizers, crossovers, etcetera).

15. USB Port

This USB connector can be used to connect the AM442D USB and AM642D USB to any modern Windows or Mac-based computer. Doing so will allow users to get a stereo signal both to and from the computer.

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16. Phantom Power Switch

When this switch is in the on position, it activates +48V of phantom power for all microphone inputs, allowing condenser microphones (well, the ones that don’t use batteries) to be used on these channels. Activating Phantom Power will be accompanied by an illuminated LED above the left channel Level Meter. Before turning Phantom Power on, turn all level controls to a minimum to avoid the possibility of a ghastly popping sound from the speakers.

AM442D USB	NB. Phantom Power should be used in conjunction with balanced
	microphones. When Phantom Power is engaged, single ended

		(unbalanced) microphones and instruments should not be used on the
		Mic inputs. Phantom Power will not cause damage to most dynamic
	10	microphones, however if unsure, the microphone’s user manual should
		be consulted.

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AM642D USB

12. Control Room Outputs

These two 1/4” phone jack outputs feed the signal altered by the

Control Room / Phones level control on the face of the mixer. This output has extensive use, as it can be used to feed the signal from the mixer to an active monitor, for the monitoring of the audio signal from within a booth, or, alternatively, for the addition of external signal processing devices or mixers, as well as acting as a “side fill” output, supplying audio to indoor areas that the main speakers do not reach.

13. Group Out

These 1/4” phone jacks output the final feed from the Group 1 and 2 faders on the main mixer. These outputs can be used to feed a wide range of devices, such as mixers, signal processors, and even to connect an amplifier and speakers to be used along with the Main Speakers, for a more rounded audio experience.

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17. Power Switch

This switch is used to turn the mixer on and off.

18. Power Connector

This port is for the addition of a power cable, allowing power to be supplied to the mixer. Please use the power cable that is included with this mixer only.

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Controls and Settings

Channel Controls

19. Line/Mic Gain Control

This controls the sensitivity of the input signal of the Line/

Microphone input. The gain should be adjusted to a level that allows the maximum use of the audio, while still maintaining the quality of the feed. This can be accomplished by adjusting it to a level that will allow the peak indicator occasionally illuminate.

20. Low Cult Filter (75 Hz)

This button will activate a high-pass filter that reduces all frequencies below 75 Hz at 18 dB per Octave, helping to remove any unwanted ground noise or stage rumble.

AM442D USB

AM642D USB

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21. Compressor Control and Indicator
This controls the onboard compressor
function on mono channels. Turning
this control up towards the 12 o’clock		19
position will adjust the threshold and
ratio of the compressor at varying		20
degrees. Once you reach the 12
o’clock position, the control will then		21
adjust the compression settings along
with an onboard expander (or, in other

words, a compander). The LED that accompanies this control will light up when the compressor is triggered.

	22. High Frequency Control
	This control is used to give a shelving
	boost or cut of ±15 dB to high frequency	22
	(12 kHz) sounds. This will adjust the
	amount of treble included in the audio
	of the channel, adding strength and
	crispness to sounds such as guitars,	23
	cymbals, and synthesizers.

23. Middle Frequency Control
This control is used to provide a peaking	24
style of boost and cut to the level of
middle frequency sounds at a range of
±15 dB. These mixers also provide a
sweep control, allowing you to select a
center frequency between 100 Hz and	25
8 kHz. Changing middle frequencies
of an audio feed can be rather difficult
when used in a professional audio mix,
as it is usually more desirable to cut	26
middle frequency sounds rather than
boost them, soothing overly harsh vocal
and instrument sounds in the audio.	27
The stereo channels of the AM442D

USB and AM642D USB mixers feature a High-Mid and Low-Mid control

instead of the typical controls described above. They provide a peaking style of boost and cut to middle frequencies, where the frequencies are set at 3 kHz and 800 Hz (High-Mid is set at 3 kHz and Low-Mid is set at 800 Hz).

24. Low Frequency Control

This control is used to give a shelving boost or cut of ±15 dB to low frequency (80 Hz) sounds. This will adjust the amount of bass included in the audio of the channel, and bring more warmth and punch to drums and bass guitars.

25. AUX Control and Pre/Post Button

This control alters the signal level that is being sent to the AUX 1 mix, the signal of which is suitable for connecting stage monitors, allowing artists to listen to the music that is being playing. Also included is a Pre/Post button, which alternates the feed to the AUX mix between a postand pre-fader feed. The AM642D USB features a second AUX send mix, and thus offers a second AUX control.

26. EFX Control

This control alters the signal level that is sent to the EFX send (AUX 2 or 3) output and the built-in digital effect processor. The

EFX send signal can be used in conjunction with external signal processors (this signal of which can be returned to mixer via the

AUX return input), or simply as an additional auxiliary output.

27. Pan / Balance Controls

This alternates the degree or level of audio that the left and right side of the main mix should receive. On mono channels, the PAN control will adjust the level that the left and right should receive (pan), where as on a stereo channel, adjusting the BAL control will attenuate the left or right audio signals accordingly (balance).

28. On Button and Indicator

This turns the channel on, allowing the user to use the feed from the channel’s inputs to supply the MAIN L/

R, GROUP 1/2,AUX and EFX buses. The corresponding indicator will be illuminated when turned on.

29. 1-2 and L-R Buttons

These handy buttons allow you to decide the audio path of the corresponding channel. Pushing the “1-2” button allows the signal to be sent to the Group 1-2 mix, where the “L-R” allows it to be sent to the Main L-R mix.

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30. Peak Indicator

This LED indicator will illuminate when the channel hits high peaks, 6 dB before overload occurs. It is best to adjust the channel level control so as to allow the PEAK indicator to light up on regular intervals only. This will ensure a greater dynamic range of audio.

31. Solo Button

The Solo button is pushed to allow the signal of a corresponding channel to be sent to the Control Room / Phones control (pre or post fader, depending on the properties selected by the pre / post button, located by the Control Room / Phones control), for use with either headphones or studio monitors. This also allows easier setting of the input gain and tracking of audio by sound engineers. The corresponding green LED will illuminate when the

Solo button is engaged.

32. Channel Level Fader

This control will alter the signal level that is sent from the corresponding channel to the main mixing bus.

33. +4 / -10 Buttons

These buttons, located on each stereo input channel, are used adjust the input sensitivity of the corresponding channel, which will adapt the mixer to external devices which may use different operating levels. If the input source is -10 dBu (consumer audio standard), it is best to engage the switch, allowing the signal to be heard. If the input source is +4 dbV (professional audio standard) the corresponding input channel’s button should be disengaged to ensure the integrity of the Mixer’s circuitry. If you are unsure of the source’s operating level, we suggest leaving the switch disengaged until you test the source’s signal. You can then engage if necessary (if the level of input is obviously too low).

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AM442D USB / AM642D USB

Digital Effect Engine

34. Digital Effect Display

This 2-digital numeric display shows the program number that is currently applied to your EFX audio signal. When you rotate the Program control, you can scroll through different program numbers; however the display will revert back to the original program if a new program is not selected within a few seconds. For a list of available effects, please observe the Digital Effect Table.

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AM642D USB

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AM442D USB

35. Sig and Clip Indicators

Located within the Digital Effect Display are Clip and Sig LEDs. The Sig LED will light up when any signal is received by the effect processor, and the Clip LED will light up shortly before excessive signals are dynamically clipped. If the Clip LED lights up too often, it may be advisable to turn down the AUX 3/EFX control on one or all input channels to ensure the signal level is not excessive.

36. Program Control

This control is used to scroll through the various effects. Turning the control clockwise will allow users to ascend into higher program numbers, and turning it counter-clockwise will allow users to descend into lower program numbers. Pushing this control will apply the new effect. When a tap-delay effect is selected, pressing this control will allow users to select the tapdelay time.

By pushing the button several times, the effect processor interprets the time between last two pushes and remembers this as the delay time – until the button is pushed again. This is kept even after the power is turned off. When the tap delay effect is selected, a small LED will flash within the digital effect display window at the selected intervals.

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	AM442D USB	AM642D USB
AM442D USB / AM642D USB

37. Effect On Button (AM642D USB)

This button is pushed to turn the corresponding effect panel on or off. When effects are bypassed, there will be 2 flashing LEDs in the effect display. This button is not featured on the AM442D USB. Users must use a footswitch to activate and deactivate effects on this model.

Master Section

38. AUX Return Controls

These controls adjust the signal level of audio fed through to the stereo AUX Return inputs, which will be added to the main mix.

The two “To AUX” controls adjust the post-fader level of the signal from the AUX Return control to the AUX 1 mix.

On the AM642D USB, the AUX return control also features a SOLO button, which sends the signal to the Control Room / Phones mixing bus, most commonly for monitoring.

39. EFX Return Control

This control adjusts the signal level of audio fed through to stereo AUX Return 2 inputs. If no device is plugged into the AUX Return 2 inputs, this control then acts as the final level control of the built-in Digital Effect Engine. The signal of this control is sent to the appropriate mixing bus, as selected by the Main L-R / Group 1-2 button.

On the AM642D USB, the EFX return control is a little different, as it is, in fact, a 6 mm fader, and takes its feed from AUX Return

2. Along with what was already stated above, the AM642D USB’s also features a SOLO button (with indicator), which sends the signal to the Control Room / Phones mixing bus; an L-R button, which allows you to send the EFX Return post-fader signal to the

Main Left and Right mixing bus; and a 1-2 button, allowing you to send the EFX Return post-fader signal to the Group 1 and 2 mix.

40. Main L/R - Group 1/2 Button

This button changes the destination of the signal sent from the

AUX Return 1 through to AUX Return 3 mixing buses between the Main L/R and Group 1/2 mixing buses.

41. AUX Send Master Controls

These controls adjust the final level of the AUX mixes (as taken from the AUX level controls on each channel strip), the audio of which is sent to corresponding AUX send outputs. The corresponding SOLO button allows you to send the AUX Send signal to the Control Room / Phones mixing bus. The AM442D

USB offers one AUX send, while the AM642D USB offers two

(excluding the EFX sends, of course). The AM642D USB’s AUX 1 send is a 60 mm fader and also features an on/off button.

42. EFX Send Master Control

This control adjusts the final level of the EFX mixing bus (as taken from the EFX level controls on each channel strip), the audio of which is sent to the AUX Send 2 (on the AM442D USB) and the

AUX Send 3 (on the AM642D USB) outputs, as well as the built-in digital effect processor. The corresponding SOLO button allows you to send the signal to the Control Room / Phones mixing bus.

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AM642D USB

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43. Control Room / Phones Controls							47. Main L/R Faders
This control is used to adjust the audio level of the phones feed,							These two faders are the final level control for the Main Left
as well as the signal sent to the Control Room output, for use							and Right audio feeds, sent to the Main L and R outputs. These
in monitoring, as side fill, or for the addition of other, external							faders are possibly fed by the various mono and stereo channels,
devices.							as well as AUX and EFX returns and 2T inputs, depending on
44. Pre / Post Control							the your selections. When pushed all the way up, these faders
							provide 10 dB of gain to the signal, and, when set all the way
This button alternates the Control Room / Phones source signals							down, effectively mute the signal.
between those of post-fader and pre-fader feeds.							48. +48V Indicator
45. 2T / USB Return Controls
							This indicator will illuminate when Phantom Power is activated.
Turning the 2T Return level control							49. Power Indicator
adjusts the signal level of the feed
from the 2T return inputs, as well as							The Power Indicator will light up when the power of the mixer is
the USB return signal. These signals						45	on; in case you weren’t too sure.
will then be fed to the Main stereo							50. Level Meter
mix. The “to Ctrl Rm” button, found
on the AM642D USB only, sends the							These dual 11or 12-segment level meters give an accurate
signal to the Control Room/Phones							indication of when audio levels of the Main L/R output
mix.							signals reach certain levels. The 0 dB indicator illuminates is
46. Group 1/2 Controls							approximately equal to an output level of +4 dBu, and the PEAK
							indicator illuminates about 6 dB before the signal is dynamically
These two faders are the final level control for the Group 1 and 2							clipped. It is suggested for the maximum use of audio to set the
audio feeds, sent to the Group 1 and 2 outputs. These faders can							various levels controls so that it sits steadily between 0 and 8 dB
be fed a signal from the various mono and stereo channels, as							to make full use of audio, while still maintaining fantastic clarity.
well as AUX and EFX returns, depending on the your selections.							When no signal is being fed through the Main L/R mixing bus, the
When pushed all the way up, these faders provide 10 dB of gain							level meter will then display the audio properties of the Control
to the signal, and, when set all the way down, effectively mute							Room / Phones feed. This is especially helpful when setting the
the signal. The Group 1/2 Controls also feature Left and Right							levels of each individual channel, as is shown in the Channel
buttons, which allow you to send the Group 1/2 post-fader signals							Setup section of this manual. The “Solo” button will illuminate
to the Main left and right mixes (as selected). The AM442D USB							when the Level Meter displays the audio properties of the Control
also features a Solo button on each Group.							Room / Phones signal.

51. Graphic Equalizer (AM642D USB only)

This stereo 9 band graphic equalizer allows the user to adjust the frequency response of a signal, with a maximum of ±12 dB of signal boost or cut for each of the frequencies. The AUX 1 / MAIN switch alternates the use of the equalizer between the use of the AUX 1 bus and MAIN L/R bus signals. Pushing the on button in activates the equalizer, which is accompanied by an illuminated

LED.

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48 49

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AM442D USB	AM642D USB
	51
	AM642D USB

AM442D USB / AM642D USB

SPECIFICATIONS

	AM442D USB	AM642D USB
Inputs
Total Channels	8	10
Balanced Mono Mic / Line Channel	5	6
Balanced Mic / Stereo Line channel	-	2
Balanced Stereo Line Channel	3	2
AUX Return	3 stereo	2 stereo
2T Input	Mini stereo and stereo RCA	Mini stereo and stereo RCA
Outputs
Main L/R Stereo	2 x 1/4” TRS, Bal. & 2 x XLR	2 x 1/4” TRS, Bal. & 2 x XLR
Group	2	2
Rec Out	Mini stereo and stereo RCA	Mini stereo and stereo RCA
CTRL RM L/R	2 x 1/4” TS	2 x 1/4” TS
Phones	1	1
Channel Strips	8	10
EFX Send	2	3
Pan/Balance Control	Yes	Yes
Volume Controls	60mm fader	60mm fader
Inserts	5	6
Master Section
Phones Level Control	Yes	Yes
Main L/R Level Control	60 mm fader	60 mm fader
Level Meter	13-segment	13-segment
Phantom Power Supply	+48V DC	+48V DC
Frequency Response (Mic input to any output)
20Hz ~ 60KHz	+0/-1 dB	+0/-1 dB
20Hz ~ 100KHz	+0/-3 dB	+0/-3 dB
Crosstalk (1KHz @ 0dBu, 20Hz to 20KHz bandwidth,
channel in to main L/R outputs)
Channel fader down, other channels at unity	<-90 dB	<-90 dB
Noise (20Hz~20KHz; measured at main output, Chan-
nels 1-4 unit gain; EQ flat; all channels on main mix;
channels 1/3 as far left as possible, channels 2/4 as
far right as possible. Reference=+6dBu)
Master @ unity, channel fader down	-86.5 dBu	-86.5 dBu
Master @ unity, channel fader @ unity	-84 dBu	-84 dBu
S/N ratio, ref to +4	>90 dB	>90 dB
Microphone Preamp E.I.N. (150 ohms terminated,	<-129.5 dBm	<-129.5 dBm
max gain)
THD (Any output, 1KHz @ +14dBu, 20Hz to 20KHz,	<0.005%	<0.005%
channel inputs)
CMRR (1 KHz @ -60dBu, Gain at maximum)	80dB	80dB
Maximum Level
Mic Preamp Input	+10dBu	+10dBu
All Other Input	+22dBu	+22dBu
Balanced Output	+28dBu	+28dBu
Impedance
Mic Preamp Input	2 K ohms	2 K ohms
All Other Input (except insert)	10 K ohms	10 K ohms
RCA 2T Output	1.1 K ohms	1.1 K ohms

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AM442D USB / AM642D USB

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Equalization		3-band, +/-15dB	3-band, +/-15dB
Low EQ		80Hz	80Hz
Mid EQ		100-8k Hz, sweepable	100-8k Hz, sweepable
L-Mid EQ		800 Hz	800 Hz
H-Mid EQ		3 kHz	3 kHz
Hi EQ		12 kHz	12 kHz
Low Cut Filter		75 Hz (-18 dB/oct)	75 Hz (-18 dB/oct)
USB Audio		Stereo In/Out	Stereo In/Out
Connector Type		USB Type B	USB Type B
Bitrate		16-bit	16-bit
Sampling Rate		48 kHz	48 kHz
Digital Effect Processor		100 effects with tap delay control and	100 effects with tap delay control
		test tones	and test tones
Footswitch		EFX on/off	EFX on/off
Power Requirements		100-240 VAC, 50/60 Hz	100-240 VAC, 50/60 Hz
Weight		8.40 lbs (3.81 kg)	10.6 lbs (4.8 kg)
Dimensions (WxHxD)		11.8” x 4.1” x 13.6”	16” x 4.12” x 14”
		(300 x 104.5 x 346 mm)	(407 x 103.5 x 357 mm)

AM442D USB / AM642D USB