McIntosh MB20 Bluetooth Transceiver

Safety First

It is important to read all enclosed MB20 SAFETY INFORMATION, even if you are familiar with such content, to ensure your safety.

Compliance Information

Safety Information

WARNING: Cancer and Reproductive Harm - www.P65Warnings.ca.gov

General Instructions:

1. Read these instructions.
2. Keep these instructions.
3. Heed all warnings.
4. Follow all instructions.

CAUTION: RISK OF ELECTRIC SHOCK - DO NOT OPEN

Usage and Care:

1. Do not use this apparatus near water.
2. Clean only with a dry cloth.
3. Do not use or place near any heat sources such as radiators, heat registers, stoves, or other apparatus that produce heat.
4. Only use attachments/accessories specified by the manufacturer, including the supplied AC/DC adapter.
5. Unplug the supplied AC/DC Adapter during lightning storms or when unused for long periods of time.
6. Refer all servicing to qualified service personnel. Servicing is required when the apparatus has been damaged in any way, the AC/DC Adapter 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.
7. Do not expose this apparatus to dripping or splashing, and no objects filled with liquids should be placed on the equipment.
8. This equipment is supplied with an AC/DC Adapter with a separate power supply cord, or the AC/DC Adapter plugs directly into an a.c. receptacle; they shall remain readily operable. To completely disconnect this equipment from the a.c. mains, remove the AC/DC Adapter mains power supply cord from the a.c. receptacle or remove the AC/DC Adapter when it is directly plugged into the a.c. receptacle.
9. Working temperature: 0-35° C.

This product is intended for use only with the adapter provided:

• Manufacturer: GOLDEN PROFIT ELECTRONICS LTD.
• Model: GPE-013B-050240-Z

WARNING: Do not expose apparatus to excessive heat such as sunshine, fire or the like. No naked flame sources such as lighted candles should be placed on the apparatus.

Rating Plate: The rating plate is located at the bottom enclosure of the apparatus.

Statement for Class B digital device acc. to FCC 15.105:
NOTE: This equipment has been tested and found to comply with the limits for a 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.
This device complies with Industry Canada licence-exempt RSS standard(s). Le présent appareil est conforme aux CNR d'Industrie Canada applicables aux appareils radio exempts de licence.

Thank You

McIntosh thanks you for purchasing the MB20 Bluetooth Transceiver. This precision instrument is designed to provide many years of enjoyment. Please take a few moments to familiarize yourself with its features and instructions to achieve maximum performance.

For further technical assistance, contact your dealer or McIntosh directly for additional questions or service needs.

McIntosh Laboratory, Inc.
2 Chambers Street, Binghamton, New York 13903
Technical Assistance Phone: (607) 723-3512
Customer Service (for repairs) Phone: (607) 723-3515
Fax: 607-724-1917
Email: support@mcintoshlabs.com
Website: mcintoshlabs.com

Make a Note

For future reference, record your serial number and purchase information here:

Introduction

The MB20 functions as either a Bluetooth receiver or a Bluetooth transmitter. It is designed to provide a superior Bluetooth connection to audio equipment lacking Bluetooth connectivity. The MB20 is a Class 1 Bluetooth device, offering a transmission range up to ten times that of a typical Class 2 Bluetooth device (like most cell phones). As a receiver, it employs an extremely sensitive receiver for better reception, even from Class 2 devices. As a transmitter, its range is up to ten times that of Class 2 devices, typically reaching 150 feet (45.7 meters) in ideal conditions with mobile devices. Actual range can be affected by physical obstacles and the performance of the connected devices.

The MB20 features internal sampling and bit shifting for sophisticated up-sampling, enabling high-speed digital processing. Its internal DAC processing at 192 kHz offers gentle audio signal filtering, with a digital output at 96 kHz for wider compatibility with other DACs.

The MB20 supports Bluetooth Transmit and Receive with aptX HD for improved sound quality, and aptX™ Low Latency for synchronized audio and video transmission. Using two MB20 units, one as a receiver and one as a transmitter, creates a full wireless aptX HD code and decode bridge.

Receiver or Transmitter

The MB20 can operate as either a Receiver (RX) or a Transmitter (TX). It can switch between these modes but can only perform one function at a time. The mode is set by pushing the RX/TX Button located on the rear of the unit.

When the RX/TX Button is depressed (pushed in), the MB20 is in Receive Mode. When the button is in the released position, the MB20 is in Transmitter Mode. Pushing the RX/TX button toggles between these two modes.

Figure 1 shows the location of the RX/TX Button on the rear panel.

MB20 Front View

The front panel features the McIntosh logo, product name, and a multi-function Front Panel Button. The button's status indicates the operating mode:

• White: Standby
• Blue: Bluetooth Receiver Mode
• Green: Bluetooth Transmitter Mode
• Flashing (Blue or Green): Discovery Mode

Figure 2 illustrates the MB20 front panel.

Power the MB20

Use the supplied AC/DC adapter and the included USB cable to power the MB20. Plugging the USB cable into a computer may not supply sufficient power for proper operation.

The DC input labeled DC 5V IN is located next to the antenna connection on the rear panel (see Figure 3).

To properly reset the MB20 when powering off and on, allow 5 to 10 seconds between removing and re-inserting the power cord.

MB20 Rear View

The rear panel provides all input and output connections:

• Analog Balanced (XLR) Inputs: Left and Right
• Digital Coax Input
• Antenna Connection
• Digital Coax Output
• Analog Balanced (XLR) Outputs: Left and Right
• Low Latency/High Definition Preference Button
• Digital Optical Input
• RX/TX Button
• DC 5 Volt Power Micro USB Input
• Digital Optical Output
• Analog Unbalanced (RCA) Inputs: Left and Right
• Analog Unbalanced (RCA) Outputs: Left and Right

Figure 3 provides a detailed view of the MB20 rear panel connections.

Attach the Antenna

Attach the included Bluetooth Antenna to the ANT Connection on the center of the rear panel. Tighten the brass nut at the base of the antenna until finger tight.

Transmitter Mode

In Transmitter Mode (TX), the MB20 accepts a signal from one of the following inputs:

• Analog Balanced (XLR)
• Analog Unbalanced (RCA)
• Digital Coax
• Digital Optical

The MB20 then sends (transmits) the signal to a connected Bluetooth device. The Front Panel Button glows Green in Transmitter Mode.

To Power On: Press and hold the Front Panel Button for two seconds. The MB20 will automatically search for the last paired device. After one minute, it enters Discovery Mode, where it remains for 15 minutes.

The MB20 will pair with a previously paired device or a new device in Discovery Mode. If no pairing occurs after 15 minutes, the MB20 powers off. If the MB20 has not been previously paired, it enters Discovery Mode more quickly (in 10 seconds).

Discovery Mode is indicated by the Front Panel Button flashing green (single blink on and off). To facilitate pairing, it is recommended to minimize other discoverable Bluetooth devices competing with the MB20.

When the MB20 pairs successfully with another device, the Front Panel Button turns solid green. When connected, the MB20 transmits the input signal via Bluetooth.

Upon powering on, the MB20 attempts to pair with the last paired device for one minute. If unavailable, it enters Discovery Mode. If a brief power interruption occurs, confirm volume settings before using connected devices.

Low Latency/High Definition Preference Button: This button sets a preference for either Low Latency or High Definition connections when the MB20 is in Transmitter mode. If both protocols are available on the receiver, this button selects which one to use. Low Latency is preferable for video viewing to better sync video and audio.

Receiver Mode

In Receiver Mode (RX), the MB20 receives a Bluetooth signal and sends it to all connected outputs:

• Analog Balanced (XLR)
• Analog Unbalanced (RCA)
• Digital Coax
• Digital Optical

The Front Panel Button glows Blue in Receiver Mode.

To pair the MB20 to receive from your device:

• Ensure the RX/TX Button is in the receive (RX) position (depressed).
• Power on the MB20. The Front Panel Button will glow blue and blink (single blink on and off) in pairing mode.
• On the device you wish to connect, scan for Available Devices. The MB20 will be listed as "MB20".
• Select "MB20" and confirm pairing if prompted.

When successfully paired, the Front Panel Button will display solid blue. Unsuccessful pairing will display solid white. You can use the Bluetooth menu of your connected device to connect and disconnect the MB20.

Clearing and Resetting

To reset the MB20 and clear the pairing list:

• Press and hold the Front Panel Button for 10 seconds. The LED will blink, pause, and then double blink. Release the button.
• Disconnect the DC USB Power Connector from the rear of the MB20 for 10 seconds, then reconnect it.

Packing the MB20

When shipping the MB20, it is highly recommended to pack it in its original shipping materials to prevent damage. Save the original box and packing material. If needed, contact McIntosh Customer Service for replacement packing material. Use only packing material in good condition.

License Information

Trademark Logo:

• Bluetooth®: The Bluetooth word mark and logos are registered trademarks owned by Bluetooth SIG, Inc. Use of these marks by McIntosh Group, Inc. is under license. Other trademarks and trade names belong to their respective owners.
• Qualcomm® aptX™: Qualcomm® aptX™ is a product of Qualcomm Technologies, Inc. and/or its subsidiaries. Qualcomm is a trademark of Qualcomm Incorporated, registered in the United States and other countries. aptX is a trademark of Qualcomm Technologies International, Ltd., registered in the United States and other countries.

Technical Specifications

Product Information

McIntosh Laboratory, Inc. is committed to the continuous improvement of its products and reserves the right to improve design without notice. Printed in the U.S.A.

McIntosh Part Number: 24109000 revF

Product Overview

The MB20 Bluetooth Transceiver is an easy and simple solution to add McIntosh quality Bluetooth streaming capabilities to virtually any McIntosh (or non-McIntosh) home audio system of any era.

It allows you to quickly turn a vintage McIntosh system into a modern home music system capable of playing digital music stored on your phone, in cloud accounts, or from preferred streaming services.

The MB20 is a small, stand-alone, complete Bluetooth streaming solution that does not require any third-party apps.

Engineered as a Class 1 Bluetooth device, the MB20 provides a superior Bluetooth connection to audio equipment lacking this feature. As a receiver, it offers exceptional sensitivity for better reception. As a transmitter, it boasts a range 10x greater than typical Class 2 devices.

It includes balanced analog inputs and outputs, offering superior audio connections for top-quality performance, along with digital inputs and outputs.

The MB20 utilizes Bluetooth® 5.0, supporting Advanced Audio Coding (AAC) and Qualcomm® aptX™ HD for high-resolution audio playback, as well as Qualcomm aptX Low Latency.

A smartphone is shown in the product image but is not included.

Stream to a McIntosh of Any Era.

Technical Summary

Frequency Response: +/-0.5dB from 20Hz to 20kHz

Total Harmonic Distortion: 0.005%

Digital Input Sample Rate: Up to 24-Bit/192kHz

Digital Output Format: 24-Bit/96kHz

Inputs: 1 Balanced XLR, 1 Unbalanced RCA, 1 Coax, 1 Optical

Outputs: 1 Balanced XLR, 1 Unbalanced RCA, 1 Coax, 1 Optical

Overall Dimensions (W x H x D): 9-29/64" (24cm) x 2-1/2" (6.35cm) (antenna in upright position adds additional 1-3/8" (3.43cm)) x 3-15/16" (10.01cm)

Weight: 2.5 lbs (1.2 kg) net, 3.5 lbs (1.6 kg) in shipping carton

For the Consumer's Protection: McIntosh products should only be purchased from an Authorized McIntosh Dealer to ensure the highest level of customer satisfaction. McIntosh does not warrant products purchased from unauthorized sources or those with altered serial numbers.

Companion Products: The MB20 can enhance any system requiring music streaming. Contact your Authorized Dealer for information on other McIntosh products.

The MB20 Bluetooth Transceiver is shown with a McIntosh system comprising MC2205 Stereo Power Amplifier (1975-1981), C33 Stereo Preamplifier (1981-1986), MCD7005 Compact Disc Player (1987-1988), and ML-1C Loudspeakers (1970-1977).

One Year Limited Warranty

Welcome to the McIntosh family. This warranty covers your new McIntosh Portable Product ("Product") for one year from the date of purchase from an Authorized McIntosh Dealer. It is designed to provide many years of trouble-free performance. Please read this warranty carefully, as it contains important rights, limitations, exclusions, and obligations. If you have questions, contact McIntosh. This is the only warranty McIntosh provides; your dealer cannot modify or expand it. Keep your Warranty Registration Card and sales receipt for service.

Scope and Duration: McIntosh warrants the Product against defects in workmanship or materials for one (1) year from the purchase date from an Authorized McIntosh Dealer.

Limitations on Persons and Products Covered: This warranty is limited to the original owner and terminates upon transfer of ownership. It is void if purchased from an unauthorized dealer or if serial numbers are altered or defaced.

Geographical Limitations: This warranty applies only to Products purchased and used within the United States and Canada.

Limitations on Non-McIntosh-Provided Services: McIntosh is not liable for issues arising from third-party services (e.g., streaming services) used with the Product, such as interruptions, reduced functionality, or other damages.

What McIntosh Will Do: McIntosh will provide free parts, materials, and labor to restore the Product to original specifications. McIntosh may also replace the Product or refund the purchase price if repair or replacement is not feasible within a reasonable time.

Owner's Responsibilities: Deliver or ship the Product to McIntosh or an Authorized McIntosh Service Agency, properly packaged, prepaid, and insured, at the owner's expense. Provide proof of purchase (completed Warranty Registration Card or original sales receipt).

Owner Payment: The owner is responsible for shipping expenses to and from McIntosh/Agency, and for repairs if proof of purchase is not provided.

Obtaining Service: Contact McIntosh Customer Service by phone (888-979-3737 or 607-723-3512), mail (2 Chambers Street, Binghamton, NY 13903-2699), or visit www.mcintoshlabs.com for nearest service agency information or warranty questions.

Note: This warranty grants specific legal rights, and other rights may vary by state.

Share Your System with Us

McIntosh values customer excellence and innovation. Share your McIntosh story and experience with fellow owners.

Submit two images (max 600x400 pixels at 72 dpi) and a 100-word description of your system to mymcintosh@mcintoshlabs.com. Tell us about yourself and your McIntosh experience.

Customer Survey

McIntosh is developing new products and services relevant to its owners. Please take a moment to fill out this survey to help with this goal. Your answers are confidential and will be used to form a better picture of customer needs.

Please Print:

1. What publications do you regularly read?

• 1-1 Wall Street Journal, 1-2 Forbes, 1-3 Departures, 1-4 Robb Report, 1-5 Wine Spectator, 1-6 Stereophile, 1-7 Home Theater, 1-8 Sound and Vision
• 1-9 Other (please specify): _________________________

2. What websites do you visit regularly?

2-1: __________ 2-2: __________ 2-3: __________ 2-4: __________

3. What hobbies do you participate in?

• 3-1 Winemaking, 3-2 Fine Dining, 3-3 Audio/Home Entertainment/Music, 3-4 Gardening, 3-5 Cooking, 3-6 Photography, 3-7 Painting, 3-8 Hunting/Fishing, 3-9 Other (please specify)

4. What types of music do you listen to?

• 4-1 Rock, 4-2 Classical, 4-3 Folk, 4-4 Easy Listening, 4-5 Jazz, 4-6 Country, 4-7 Blues, 4-8 Rap/Hip Hop, 4-9 Other (please specify)

5. In a few short words, describe what the McIntosh name means to you.

____________________________________________________________________________________________________

6. In your opinion what sets McIntosh apart from the competition?

____________________________________________________________________________________________________

7. Where did you first learn about McIntosh products?

• 7-1 Friend, 7-2 Salesperson, 7-3 Advertising, 7-4 Web Site (please specify): _________________________, 7-5 Other (please specify): _________________________

8. How long have you been a McIntosh owner?

• 8-1 0-5 years, 8-2 5-10 years, 8-3 10-20 years, 8-4 20+years

9. What other McIntosh products do you own?

____________________________________________________________________________________________________

10. Prior to purchasing your audio-video products, from what sources did you get information?

• 10-1 Internet, 10-2 Friend, 10-3 Magazine, 10-4 Other (please specify): _________________________

11. What was the name of the dealer you purchased this piece from?

____________________________________________________________________________________________________

12. Rate the dealer on the following (1 being least, 5 being most):

• Courteous: 12-1(1) 12-2(2) 12-3(3) 12-4(4) 12-5(5)
• Knowledge about McIntosh: 12-6(1) 12-7(2) 12-8(3) 12-9(4) 12-10(5)
• Quality of Product Demonstration: 12-11(1) 12-12(2) 12-13(3) 12-14(4) 12-15(5)

13. What additional McIntosh components would you buy in the future?

• 13-1 Loudspeakers, 13-2 Amplifiers, 13-3 CD player, 13-4 DVD player, 13-5 Music servers, 13-6 Preamplifiers, 13-7 A/V Control Centers, 13-8 Tuners, 13-9 Turntable

14. How satisfied were you with the quality of the information on the McIntosh website?

• 14-1 Not satisfied, 14-2 Somewhat satisfied, 14-3 Satisfied, 14-4 Very Satisfied

15. How would you improve the McIntosh website?

____________________________________________________________________________________________________

16. How willing would you be to recommend McIntosh to your closest friends?

• 16-1 Not willing, 16-2 Somewhat willing, 16-3 Willing, 16-4 Very Willing

17. How can McIntosh better serve you?

____________________________________________________________________________________________________

18. What suggestions do you have that would improve the McIntosh product line?

____________________________________________________________________________________________________

19. Are you Male or Female?

• 19-1 Male, 19-2 Female

20. What is your marital status?

• 20-1 Married, 20-2 Single, 20-3 Separated or Divorced, 20-4 Widowed

21. What is your age?

• 22-1 Under 30, 22-2 30-40, 22-3 40-50, 22-4 50-60, 22-5 60-70, 22-6 Over 70

22. What is the highest level of formal education you have attained?

• 23-1 Grade school, 23-2 High school, 23-3 Two year college degree, 23-4 Four year college degree, 23-5 Masters degree, 23-6 PhD, 23-7 Law school, 23-8 Medical School

23. In what type of business or profession are you engaged?

• 24-1 Education, 24-2 Construction, 24-3 Sales/Marketing, 24-4 Financial Services, 24-5 Manufacturing, 24-6 Engineering, 24-7 Medical, 24-8 Retired, 24-9 Other (please specify)

24. What is (was, if you are retired) your title or position?

• 25-1 Executive, 25-2 Manager, 25-3 Business Owner, 25-4 Teacher, 25-5 Doctor, 25-6 Dentist, 25-7 Lawyer, 25-8 Other (please specify)

25. What is your household's approximate total annual income before taxes?

• 26-1 Under $50,000, 26-2 $50,000 - $74,999, 26-3 $75,000 - $99,999, 26-4 $100,000 - $199,999, 26-5 $200,000 - $299,999, 26-6 $300,000 - $399,999, 26-7 Over $400,000