NAD M66 Streaming DAC Preamplifier Owner's Manual

IMPORTANT SAFETY INSTRUCTIONS

WARNING: Please read all safety and operating instructions before operating the product. Retain these instructions for future reference. Adhere to all warnings on the product and in the operating instructions. Follow all operating and use instructions.

Cleaning: Unplug the product before cleaning. Do not use liquid or aerosol cleaners; use a damp cloth.

Attachments: Do not use attachments not recommended by the manufacturer, as they may cause hazards.

Water and Moisture: Do not use this product near water, in wet basements, or near swimming pools.

Accessories: Do not place the product on an unstable cart, stand, tripod, bracket, or table, as it may fall and cause injury or damage. Use only with manufacturer-recommended accessories. Follow mounting instructions.

Cart Movement: Move product and cart combinations with care to avoid overturning.

Ventilation: Do not block ventilation slots or openings. Do not place the product on soft surfaces like beds or sofas. Ensure proper ventilation in built-in installations.

Power Sources: Operate only from the indicated power source and connect to a MAINS socket outlet with protective earthing.

Power-Cord Protection: Route power cords to prevent them from being walked on or pinched.

Mains Plug: Ensure the mains plug (disconnect device) remains readily operable.

Outdoor Antenna Grounding: If an outdoor antenna or cable system is connected, ensure it is grounded according to National Electrical Code (ANSI/NFPA 70) for protection against voltage surges and static charges.

Lightning: For added protection during lightning storms or prolonged periods of non-use, unplug the product and disconnect the antenna/cable system.

Power Lines: Keep outside antenna systems away from overhead power lines or circuits. Contact with power lines can be fatal.

Overloading: Do not overload wall outlets or extension cords, as this may cause fire or electric shock.

Flame Sources: Do not place naked flame sources, such as lighted candles, on the product.

Object and Liquid Entry: Never push objects into openings or spill liquids on the product, as this may cause fire or electric shock.

Headphones: Excessive sound pressure from headphones can cause hearing loss.

Damage Requiring Service: Unplug the product and refer servicing to qualified personnel if the power cord/plug is damaged, liquid has been spilled, objects have fallen in, the product has been exposed to rain/water, it does not operate normally, it has been dropped or damaged, or exhibits a distinct change in performance. Do not adjust controls not covered by operating instructions.

Replacement Parts: Ensure service technicians use manufacturer-specified replacement parts.

Battery Disposal: Dispose of batteries according to governmental regulations and environmental instructions.

Safety Check: After service or repairs, ask the technician to perform safety checks.

Wall or Ceiling Mounting: Mount only as recommended by the manufacturer.

WARNING: The lightning flash with arrowhead symbol indicates the presence of uninsulated "DANGEROUS VOLTAGE" within the product's enclosure that may be of sufficient magnitude to constitute a risk of electric shock.

CAUTION: The exclamation point indicates the presence of important operating and maintenance instructions in the accompanying literature.

CAUTION REGARDING PLACEMENT: To maintain proper ventilation, leave a space around the unit (from largest outer dimensions including projections) of at least 10 cm on the left/right panels, 10 cm on the rear panel, and 10 cm on the top panel.

FCC STATEMENT

This equipment has been tested and found to comply with the limits for Class B digital device, pursuant to Part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference in a residential installation. This equipment generates, uses, and can radiate radio frequency energy and, if not installed and used in accordance with the instructions, may cause harmful interference to radio communications. However, there is no guarantee that interference will not occur in a particular installation. If this equipment does cause harmful interference to radio or television reception, which can be determined by turning the equipment off and on, the user is encouraged to try to correct the interference by one or more of the following measures:

• Reorient or relocate the receiving antenna.
• Increase the separation between the equipment and receiver.
• Connect the equipment into an outlet on a circuit different from that to which the receiver is connected.
• Consult the dealer or an experienced radio TV technician for help.

CAUTION: Changes or modifications not expressly approved by NAD Electronics for compliance could void the user's authority to operate this equipment.

This device complies with Part 15 of the FCC Rules / Industry Canada licence-exempt RSS standard(s). Operation is subject to the following two conditions: 1. This device may not cause harmful interference, and 2. This device must accept any interference received, including interference that may cause undesired operation.

Under Industry Canada regulations, this radio transmitter may only operate using an antenna of a type and maximum (or lesser) gain approved for the transmitter by Industry Canada. To reduce potential radio interference to other users, the antenna type and its gain should be so chosen that the equivalent isotropically radiated power (e.i.r.p.) is not more than that necessary for successful communication.

To prevent electric shock, match wide blade of plug to wide slot, fully insert. Marking and rating plate are found at the rear panel. Do not expose this apparatus to rain or moisture. Objects filled with liquids shall not be placed on the apparatus.

Mains plug is used as the disconnect device and should remain readily operable. To disconnect the apparatus from the mains completely, the mains plug should be disconnected from the mains socket outlet completely.

Battery shall not be exposed to excessive heat such as sunshine, fire or the like. Danger of explosion if battery is incorrectly replaced. Replace only with the same or equivalent type.

An appliance with a protective earth terminal should be connected to a mains outlet with a protective earth connection.

MPE REMINDER: To satisfy FCC/IC RF exposure requirements, a separation distance of 20 cm or more should be maintained between the antenna of this device and persons during device operation. Operations at closer than this distance are not recommended.

IF IN DOUBT CONSULT A COMPETENT ELECTRICIAN.

This product is manufactured to comply with the radio interference requirements of EEC DIRECTIVE 2004/108/EC.

NOTES ON ENVIRONMENTAL PROTECTION: At the end of its useful life, this product must not be disposed of with regular household waste but must be returned to a collection point for the recycling of electrical and electronic equipment. The symbol on the product, user's manual and packaging indicates this. Materials can be reused in accordance with their markings. Through re-use, recycling of raw materials, or other forms of recycling of old products, you are making an important contribution to the protection of our environment. Your local administrative office can advise you of the responsible waste disposal point.

INFORMATION ABOUT COLLECTION AND DISPOSAL OF WASTE BATTERIES (DIRECTIVE 2006/66/EC): Batteries bearing symbols indicate they should be treated as "separate collection" and not as municipal waste. Maximize separate collection of waste batteries and minimize disposal as mixed municipal waste. End-users are exhorted not to dispose waste batteries as unsorted municipal waste. Discard waste batteries separately and properly through an accessible collection point. For more information, contact your local municipality, waste disposal service, or point of sale. By ensuring compliance and conformance to proper disposal of waste batteries, potential hazardous effects on human health are prevented and the negative impact of batteries on the environment is minimized.

FREQUENCY BAND AND TRANSMISSION POWER:

NAD® is a trademark of NAD Electronics International. NAD Electronics International is a division of Lenbrook Industries Limited. ©NAD, All Rights Reserved

INTRODUCTION

This section provides an overview of the M66's contents and initial setup.

WHAT'S IN THE BOX

• Two detachable mains power cords
• SRM1 remote control with 2 AA batteries
• Mic Assembly with Ferrite Base
• USB MIC Sound Adaptor
• USB flash drive
• Cleaning cloth
• Quick Setup Guide

NOTE: Follow the supplied Quick Setup Guide to get started with your M66.

SAVE THE PACKAGING: Please save the box and packaging for safe transport or storage of your M66.

FACTORY RESET

A Factory Reset is recommended if the M66 is not functioning correctly or if an internet firmware upgrade has failed. This action will erase all customizations, including Wi-Fi network configuration, file shares, and saved playlists. These will need to be re-created after the reset.

The M66 can be factory reset using the following methods:

1. Via Front Panel Display: Navigate to Settings > Other > Factory Reset and follow the on-screen prompts.
2. Force Factory Reset:
   1. Switch OFF the rear panel POWER switch.
   2. Press and hold the rear panel RESET tact switch.
   3. While holding the RESET switch, switch ON the rear panel POWER switch. Do not release the RESET switch.
   4. Hold the RESET switch: The STATUS INDICATOR (NAD logo) will blink Red, White, then Red. "BluOS Service Mode" will appear on the front panel display.
   5. Wait for the front panel display to show "Factory Reset..." and then release the RESET tact switch.
   6. A successful Factory Reset is indicated by the unit rebooting.
   7. For wireless connection, the M66 returns to Hotspot mode and the STATUS INDICATOR (NAD logo) turns solid white.
   8. For wired connection, the M66 connects as a new player, and the NAD logo indicator turns solid white.
   IMPORTANT: Releasing the RESET switch before the STATUS INDICATOR (NAD logo) begins flashing red will cancel the reset and leave the M66 in Upgrade Mode. Restart the procedure if this occurs.

GETTING STARTED

QUICK SETUP GUIDE

Your M66 can be connected to your home network via Wired or Wireless connection. Ensure you have a broadband router that supports Ethernet and/or Wi-Fi standards.

Mobile Device Controller: Tablets and smartphones supporting iOS or Android can be used as controllers. Download and install the "BluOS Controller" App from the respective app stores. Desktop Apps for Windows and macOS are available from the BluOS homepage: https://www.bluesound.com.

When the BluOS App is opened after network setup, the M66 may show a "NEEDS SETUP" prompt. Select your M66 and follow the instructions to complete setup. Software upgrades will be checked automatically.

WIRED CONNECTION

Using an Ethernet cable (not supplied), connect one end to the M66's LAN port and the other end directly to your wired network or router.

WIRELESS CONNECTION

Configure wireless network connection using a smartphone, tablet, or computer. The M66 must be in hotspot mode (default setting) for wireless setup. Ensure no wired connection is established.

A WIRELESS ACCESSORY CONFIGURATION (WAC) USING iOS DEVICE

1. Select "Settings" on your iOS device.
2. Go to "WiFi" and select your desired network.
3. Scroll down to "SETUP NEW AIRPLAY SPEAKER" and select your M66 (indicated by M66-xxxx, where xxxx are the last 4 digits of the MAC address). The complete MAC address is on the M66 rear panel sticker.
4. On the "AirPlay Setup" screen, select "Next". You can customize the speaker name here.
5. AirPlay Setup proceeds automatically. Follow prompts until "Setup Complete" is shown. Select "Done" to exit.

B USING iOS DEVICE

1. Open the BluOS App and select the "Players" tab.
2. Select + (Add a Player) to launch the setup wizard.
3. From the "My Players" screen, select your M66's unique network ID under "Needs Setup".
4. On the "AirPlay Setup" screen, select "Next". You can customize the speaker name.
5. AirPlay Setup proceeds automatically. Follow prompts until "Setup Complete" is shown. Select "Done" and then "Finish" to exit.

C USING ANDROID DEVICE

1. Open the BluOS App and select the "Players" tab.
2. Select + (Add a Player) to launch the setup wizard.
3. Select your M66's unique network ID from the "My Players" window.
4. Under "Choose WiFi Network", select your Home WiFi Network or "Custom SSID" if hidden.
5. Enter your network's SSID and Security Method.
6. Enter your WiFi Password and select "Continue".
7. Select or enter a preferred "Name" for your M66 and select "Continue".
8. Network setup proceeds automatically. Follow prompt messages.
9. Connection is completed when "All done!" is shown. Select "Finish" to exit.

* The M66's unique network ID is the product name (e.g., M66) followed by the last four digits of the MAC address (e.g., M66-001A).

D WIRELESS MANUAL SETUP

1. Select your M66's unique network ID from your device's WiFi settings and connect.
2. A "Control Panel" menu window should open. If not, open a web browser and visit http://10.1.2.3.
3. Select "Configure WiFi" from the menu.
4. Select your network name (SSID) from the "Configure Wireless" drop-down menu.
5. Enter your network's Wireless Password (Passphrase/WEP/WAP key).
6. Select a "Player name" or enter a "Custom name".
7. Select "Update" to save settings. A "Congratulations..." screen will appear.
8. Go back to your device's WiFi Settings and confirm reconnection to your correct WiFi network.
9. Your M66 is now connected and ready for use with the BluOS controller App.

NOTES: Procedures may change. Check the NAD M66 product page for the latest updates.

IDENTIFICATION OF CONTROLS

FRONT PANEL

The front panel features a touch-sensitive display, a standby button, a status indicator, a headphone jack, and a volume control knob.

Diagram Description: The front panel shows a circular standby button (1) with an LED indicator, a NAD logo status indicator (2), a 1/4" headphone jack (3), a touch panel display (4), and a volume control knob (5).

1 o(STANDBY)

Press and hold to switch between operating mode and standby mode. The STATUS INDICATOR (NAD logo) is amber in standby mode and white when operating. The button requires the rear panel POWER switch to be ON.

IMPORTANT NOTES:

• The unit must be plugged into mains power.
• The rear panel POWER switch must be set to ON.
• When the rear panel POWER switch is ON, the unit automatically turns ON (operating mode) without needing to press the front standby button.

AUTO STANDBY MODES

• Network Standby Mode: Unit enters standby (less than 8W) after 15 minutes of inactivity. Network and Bluetooth connections are maintained. The M66 can be woken by touching the standby button, front panel display, rotating the volume knob, playing network/Bluetooth sources, or pressing the [ON] button on the SRM1 remote.
• Deep Standby Mode: Activated by pressing and holding the o(Standby) button for over 5 seconds. The unit enters standby with lowest power consumption (less than 0.5W). Network and Bluetooth connections are not maintained. The M66 can be woken by touching the standby button or rotating the volume knob.

2 STATUS INDICATOR (NAD LOGO)

• Amber: Standby mode.
• Solid White: Powered up from standby, connected to network, ready to use.
• Solid Red: Powering up, rebooting, booting up.

Table of Color Blink Codes and Descriptions:

3 HEADPHONE

A 1/4" stereo jack socket is provided for headphone listening. Volume and tone controls are operative. Inserting a headphone jack automatically switches off output at ANALOG AUDIO OUTPUT and SUBWOOFER OUTPUT.

4 DISPLAY (TOUCH PANEL DISPLAY)

Displays visual information about music, media sources, settings, and menu options. Touch controls are also displayed. Touching the panel switches the unit from low power standby to operating mode.

5 VOLUME

Adjusts the overall loudness for speakers or headphones. Turn clockwise to increase, counterclockwise to decrease. Rotating the knob also switches the unit from low power standby to operating mode.

REAR PANEL

The rear panel houses all input/output connections and controls.

Diagram Description: The rear panel features numbered ports from 1 to 24, including Service/Reset, HDMI eARC, Bluetooth/Wi-Fi antenna terminals, LAN/USB, Digital Inputs (Optical, Coaxial, AES/EBU), Subwoofer Outputs (Single-Ended and Balanced), RS232, IR IN, +12V Trigger, Phono inputs (MC/MM), Ground connector, Line Inputs, Balanced Input, Analog Audio Outputs (Balanced and Single-Ended), Fuse Holder, and AC Mains Input.

1 SERVICE

USB port and tact switch for servicing purposes only.

2 RESET

Tact switch for forcing a factory reset. Refer to the FORCE FACTORY RESET section.

3 HDMI eARC

Connect to a TV supporting HDMI Control (CEC) and Audio Return Channel (ARC) or Enhanced Audio Return Channel (eARC). Use an Ultra High Speed HDMI cable. The M66 will output audio from the TV. IMPORTANT: Ensure ARC/eARC-connected devices are set to PCM only. Only TV audio output is supported.

4 BLUETOOTH (BT) ANTENNA TERMINAL

Install the supplied antenna here.

5 LAN/USB

LAN: Connect to your wired Ethernet broadband router using a standard Ethernet cable for wired network connection. Your router should have a DHCP server enabled. USB: Connect a USB drive formatted as FAT32, NTFS, or Linux ext4. The USB drive can be shared with other players on the network (access via "Library" in BluOS App) or restricted to M66 access (appears as "Local Source (USB)" in BluOS App).

NOTES: NAD is not responsible for internet connection malfunctions due to communication errors. Contact your Internet Service Provider (ISP) for assistance.

6 WI-FI ANTENNA TERMINAL

Install the supplied antenna here.

7 OPTICAL 1-2/COAXIAL 1-2

Connect to the digital outputs of sources like CD players, cable boxes, etc. Sources appear as "Optical 1", "Optical 2", "Coaxial 1", "Coaxial 2" in the BluOS App.

8 AES/EBU IN

Connect professional audio sources with XLR connectors. Recommended for high-end sources with high sampling rates (176kHz, 192kHz). Source appears as "AES/EBU" in BluOS App.

9 SUBWOOFER OUTPUT SINGLE-ENDED 1-4

Connect to the low-level inputs of powered subwoofers. Reproduces low-frequency information below the selected crossover setting.

10 RS 232

For integration with smart control and automation systems (e.g., Control4, Crestron). Connect to a Windows-compatible PC using an RS-232 serial cable for remote control. Refer to NAD website for protocol documents.

11 IR IN

Connect to an IR repeater or compatible device output to allow remote control from a distance.

12 +12V TRIGGER IN 1, IN 2, OUT

+12V TRIGGER OUT: Controls external equipment with a +12V trigger input. Output is 12V when M66 is ON, 0V when OFF or in standby.

13 SUBWOOFER OUTPUT BALANCED 1-4

Connect to the low-level inputs of powered subwoofers. Reproduces low-frequency information below the selected crossover setting.

14 POWER

Supplies AC mains power. When switched ON, the unit automatically turns ON. Switch OFF if not using for extended periods. With the POWER switch OFF, neither the front standby button nor the remote control can activate the M66.

15 PHONO MC

Input for a Moving Coil phono cartridge. Connect turntable's twin RCA lead here.

16 PHONO GROUND CONNECTOR

Connect the turntable's single wire earth lead here.

17 PHONO MM

Input for a Moving Magnet phono cartridge. Connect turntable's twin RCA lead here.

18 LINE IN 1, IN 2

Inputs for line-level sources like CD players or tuners. Use dual RCA-to-RCA cables. Sources appear as "Line 1" and "Line 2" in BluOS App.

19 BALANCED IN

Connect XLR audio sources. Ensure proper pin configuration (Pin 1: Ground, Pin 2: Positive, Pin 3: Negative). Digital audio streams from professional sources with high sampling rates are recommended for the AES/EBU IN connector.

20 ANALOG AUDIO OUTPUT (BALANCED)

Use for external sources with BALANCED audio input. Offers superior audio quality with noise reduction.

21 ANALOG AUDIO OUTPUT (SINGLE-ENDED)

Use for sources not equipped with BALANCED analog audio input. Connect to amplifiers or receivers using twin RCA-to-RCA leads.

IMPORTANT: No audio output at ANALOG AUDIO OUTPUT (BALANCED and SINGLE-ENDED) if headphones are connected or if M66 is in Bluetooth Headphones mode.

22 FUSE HOLDER

Accessible only by qualified NAD service technicians. Opening may void warranty.

23 GROUND

Connect a ground lead wire here if a separate earth ground is necessary.

24 AC MAINS INPUT

Connect the supplied mains power cord appropriate for your region. Ensure the cord is firmly connected to the unit before plugging into the mains outlet. Always unplug from the mains outlet before disconnecting from the unit.

SRM 1 REMOTE CONTROL

Diagram Description: The SRM 1 remote control features an LED indicator (1), buttons for Status Indicator brightness (2), Standby (3), Volume Up/Down (5), Mute (4), EQ (6), user-defined buttons (p/+, -/q) (7), playback controls (8), and numbered preset buttons (1 to 10).

1 LED indicator

Blinks whenever a command is sent.

2 [Brightness]

Set indicator brightness level of Status Indicator (NAD logo).

3 o [Standby]

Switch between low power standby mode and operating mode.

4 [Mute]

Temporarily switch off or restore audio. Press again or adjust Volume to restore audio.

5 VOL +/-

Increase or decrease volume level.

6 EQ

Toggle to select through saved Dirac Filter settings.

7 p/+, -/q [User Defined]

Function can be assigned via IR Learning.

8 Playback Controls

• 4: Go to the next song/file.
• 3: Go to the beginning or previous song/file.
• 56: Toggle to select through Sources.
• ENTER: Start or pause playback.

1 to 10 numbered buttons

Select Preset number.

OPERATION

USING THE FRONT PANEL DISPLAY

The intuitive front panel display allows navigation through functions, features, and sources. Touch anywhere on the display to access menu options.

NAVIGATING THE FRONT PANEL DISPLAY ITEMS AND MAKING CHANGES

Use your finger to touch, swipe (left, right, upwards, or downwards) to select or configure items.

SAMPLE DISPLAY SCREEN NOW PLAYING

The "Now Playing" display shows album art (3), music information (2), source icons, elapsed playback time (6), playback controls (7), volume level (8), and the play queue (5). The display defaults to a "Front View" if no user interaction occurs for 10 seconds.

MENU OPTIONS

• SOURCES: Select preferred source to access or playback content. A new screen shows configurable Sources and Players.
• PRESETS: Use the BluOS App to program favorite radio stations, music streams, playlists, or sources into Presets.
• SETTINGS: Configure M66 settings. Options include:
  • Player: Sleep Timer, Room Name, Tone Controls (Bass/Treble adjustment, ON/OFF, Reset), Select Attached Speakers (1-4 subwoofers), Crossover setting, Digital Dynamic Headroom (DDH) for reduced distortion, LCD Brightness, Indicator Brightness (Normal, Dim, Off), Dark Mode, Standby settings (Network/Deep), Bluetooth settings (Manual, Automatic, Guest, Disabled), Volume Limits, LCD Temporary Display, Volume In Percent display, Disable Wi-Fi/Bluetooth.
  • Source Setup: Configure Sources, customize Source Name, assign Icon, configure Front View display (Source Simple/Detailed, Analog/Digital VU meter, Album art variations), MQA Pass-through (for Coaxial/Optical sources, requires AV Mode disabled), A/V Mode (for audio/video sync, requires Lip-sync delay adjustment), Lip-sync delay (50-150ms), Hide Source, Analog Direct (bypasses digital processing for analog inputs).
• MUSIC LIBRARY: Reindex Library to scan for new, deleted, or updated files.
• OTHER: Language selection, Reboot unit, Factory Reset, BluOS Upgrade.
• SYSTEM INFO: Displays BluOS firmware version, IP Address, MAC Address (Ethernet and Wi-Fi).
• DISCONNECT/FORGET DEVICE: Manage Bluetooth devices.

USING SRM 1 REMOTE CONTROL

The SRM 1 remote control allows operation of the M66. Refer to the "SRM 1 REMOTE CONTROL" section for button descriptions.

OTHER FUNCTIONS AND FEATURES

BLUETOOTH HEADPHONE/SPEAKER PAIRING

Bluetooth headphones/speakers can be paired to your M66 using the BluOS Controller App.

MASTER QUALITY AUTHENTICATED (MQA)

The M66 includes a powerful decoder and audio renderer for the MQA system, ensuring MQA-encoded audio files sound exactly like the source. MQA indicators are shown on the front panel display and in the BluOS app.

MAKING THE MOST OF YOUR M66

Download the BluOS Controller App for Apple iOS, Android, Kindle Fire, Windows, or macOS. Launch the app to explore streaming music services, internet radio, and networked music collections with easy search functionality. Visit https://support.bluos.net for more information.

DIRAC LIVE

The M66 integrates Dirac Live Full Frequency and Dirac Live Bass Control. Connect the supplied calibrated microphone to the M66's USB port and launch the Dirac Live app on a smart device or computer. Create a Dirac account to activate the included licenses. The app guides you through calibration, generating correction filters to compensate for acoustic issues, resulting in improved bass, tonal accuracy, clarity, and imaging.

The M66 features four balanced and four single-ended subwoofer outputs, integrating Dirac Live Bass Control for independent calibration of multiple subwoofers. This optimizes subwoofer output in frequency and time domains for a seamless blend with main speakers and smooth, consistent bass response throughout the listening area.

REFERENCE SPECIFICATIONS

PREAMPLIFIER SECTION

LINE IN, SINGLE-ENDED ANALOG AUDIO OUTPUT

BALANCED IN, BALANCED ANALOG AUDIO OUTPUT

DIGITAL SOURCE IN, SINGLE-ENDED ANALOG AUDIO OUTPUT

DIGITAL SOURCE IN, BALANCED/ANALOG AUDIO OUTPUT

LINE IN, SINGLE-ENDED SUBWOOFER OUTPUT/2SUBWOOFERS

BALANCED IN, BALANCED SUBWOOFER OUTPUT/2SUBWOOFERS

PHONO INPUT, SINGLE-ENDED ANALOG AUDIO OUTPUT (Analog Direct)

LINE IN, HEADPHONE OUT (Analog Direct)

POWER CONSUMPTION

BLUOS SECTION

AUDIO

CONNECTIVITY

USER INTERFACE

SUPPORTED SERVICES**

DIMENSION AND WEIGHT

* - After 15 minutes of no user interface interaction and no active source input.

** - Some supported services are not available in all geographic regions due to copyright laws and licensing agreements. Check supported services availability in your area or region.

*** - Gross dimension includes feet, volume knob and extended rear panel terminals.

Specifications are subject to change without notice. For updated documentation and features, please check out www.NADelectronics.com for the latest information about M66.