The Masters Series M33 is a streaming integrated amplifier by NAD that delivers 200 watts x 2 channels into 8 ohms and 380 watts x 2 channels into 4 ohms. It was released in July 2020. It is a 2-channel design using a Class D output stage. Bridged to mono it delivers 640 watts into 8 ohms in bridged mono mode, which is the usual way to use a pair of these on a demanding speaker. A minimum impedance of 4 ohms makes it compatible with a wide range of loudspeakers. It has a built-in DAC (32-bit/384kHz ESS Sabre), so you can play digital sources directly with no separate DAC unit needed. It also has a phono input, so a turntable can connect straight to it. The NAD Masters Series M33 has an MSRP of $6,499.
NAD later replaced the NAD Masters Series M33 with the NAD Masters Series M33 V2. Follow the link to read our in-depth comparison of these speakers:
Compare NAD Masters Series M33 vs NAD Masters Series M33 V2
There are 10 NAD amplifiers in our database. Below you can see the main specs of these amps.
NAD Integrated Amplifier Series
Performance Specs
One of the most important factors when deciding on an integrated amplifier is its power ratings and compatibility with your speaker's impedance requirements. The NAD Masters Series M33 is rated at 200 watts RMS into 8-ohms. NAD provides this wattage at a THD (Total Harmonic Distortion) of 0.003% which is an important indicator of distortion at the given values (lower THD is better).
Here are the main highlights of its performance specs:
- 200 watts into 8-ohms (20 Hz-20 kHz) at 0.003%
- 380 watts into 4-ohms
- 4-ohms Min Impedance (allows compatibility with a wide range of loudspeakers)
- 120dB Signal to Noise Ratio
How loud will 200 watts actually play in your room? →
Wiring more than one pair of speakers to it? Check the load first →
Which speakers suit the NAD Masters Series M33?
200 W into 8 ohms, 380 W into 4, rated down to 4 ohms.
We rank every passive speaker we cover against it on power, impedance safety and current
delivery.
Need more power?
NAD Masters Series M33 is rated at 200 watts into 8 ohms, which puts it in our Over 180 watts band. That is the top band we cover, so there is no step up from here - if it is not enough, the answer is more sensitive speakers or a smaller room, not more watts.
When pairing the NAD Masters Series M33 with a passive Bookshelf (Stand mount) or Passive Floor Standing (Tower) speaker, you have to check if their Max Power Range is below the max wattage of the amp for the given impedance levels.
Operating your amp outside of this max range may damage the speakers.
What size of room is the NAD Masters Series M33 Amplifier good for?
An essential deciding factor is the size of the room in which you intend to employ the NAD Masters Series M33 amplifier. Here, taking into account its maximum power parameters, we analyzed its applicability to various size environments:
| Listening Environment |
Suitability |
| Near-field | Are you nuts? |
| Small Room | Bad |
| Mid-size Room | Poor |
| Large Room | Good |
| Very Large Room | Good |
Inputs and Outputs
Besides the performance specs of the NAD Masters Series M33, the next important feature set that you have to evaluate is the input and output selections that it offers.
NAD Masters Series M33 has total of 2 Analog inputs including 1 Phono Input (MM,MC).
NAD Masters Series M33 Back View (Click the image for the larger version)
Inputs
- Total Number of Analog Inputs: 2
- Phono Input
- 2 Optical Digital Input
- 2 Coaxial Digital Input
- USB Input:
- USB-A(Thumbdrive/External HD)
- HDMI Input (eARC)
Outputs
- Speaker Outputs (A/B switchable)
- Stereo RCA, Sub Preamp Outputs
- 1/4 Headphone Output
- Subwoofer Output (2)
Bluetooth Connectivity
NAD Masters Series M33 features built-in Bluetooth 4.0 for wireless music streaming from your Bluetooth-enabled devices such as Apple iPod/iPhone/iPad, Android smartphone/tablet, Windows PC, Mac computers/laptops.
Among the amps in the same price range, these are the 5 amps that have Bluetooth Connectivity:
NAD Masters Series M33 supports the following Bluetooth Codecs when used with supported devices:
Bluetooth Transmitter:NAD Masters Series M33 can also act as a Bluetooth transmitter, making it possible to stream the music from the amp to your bluetooth headphones or speakers.
Phono Input
NAD Masters Series M33 features one Phono Input which is compatible with
MM (Moving Magnet) type of phono cartridges, you can connect your turntable with MM cartridges directly to this amp without the need for a phono preamp. If you are using an MC cartridge on your turntable, you need to use a phono preamp that has MC phono stage such as the
Cambridge Duo or the
iFi ZEN Phono.
Subwoofer Output
NAD Masters Series M33 has a dedicated subwoofer output which can be used to connect it directly to a powered subwoofer via an LFE(Low Frequency Effects) cable.
Check our
Powered Subwoofers page to find a subwoofer that will work with NAD Masters Series M33 amp and your speakers.
DAC and Digital Music
The NAD Masters Series M33's built-in DAC allows the connection of digital sources directly, eliminating the need for an external DAC. The DAC chip that is used in the Masters Series M33 is the
32-bit/384kHz ESS Sabre, and supports resolutions up to
24-bit, 192KHZ.
NAD Masters Series M33 Pros and Cons
Drawn from the published figures on this page, not from listening.
- ✓Power nearly doubles into a harder load, 200 watts into 8 ohms rising to 380 into 4, which points to a power supply with real current in reserve.
- ✓200 watts per channel into 8 ohms is more than most rooms and most speakers will ever ask for.
- ✓Class D output stage, so it runs cool and wastes little power as heat - which is how it fits in a small case.
- ✓Signal-to-noise ratio of 120dB, so the amplifier itself should be inaudible between tracks.
- ✓Distortion is specified at 0.003%, an order of magnitude below what is generally held to be audible.
- ✓Built-in DAC handling 24-bit / 192, so a TV, computer or streamer can connect digitally with nothing in between.
- ✓Digital inputs cover 2 optical, 2 coaxial and USB.
- ✓Phono stage built in (MM,MC), for moving-magnet and moving-coil cartridges alike.
- ✓Streams over the network without a separate streamer: AirPlay 2, Roon and BluOS.
- ✓Bluetooth (version 4.0 and AptX HD) for playing straight from a phone.
- ✓Pre-outs (Stereo RCA, Sub) leave room to add a power amplifier or an active subwoofer later.
- ✓A and B speaker terminals, for a second pair or for bi-wiring.
- ✓Headphone output (1/4).
- ✓Has tone controls.
- ✓Detachable mains lead (IEC 3-prong).
- Nothing the published specs count against it.
NAD Masters Series M33 External Dimensions and Weight
NAD Masters Series M33 has external dimensions of (H x W x D) 5-1/4inch x 17-1/8inch x 17-5/8inch (134.0mm x 435.0mm x 448.0mm ). The unit weighs
9.73 kg (21.4 lbs).
Base Surface Area
Base surface area of an integrated amplifier may become an important decision factor when the space in your room or desk is limited.
The base area of the NAD Masters Series M33 is approximately 1948.8cm2 / 302.1inch2.
- Width: 435.0mm (17-1/8")
- Height: 134.0mm (5-1/4")
- Depth: 448.0mm (17-5/8")
- Weight: 9.73 kg (21.4 lbs)
- Base Surface Area: ~1948.8cm2 / 302.1inch2
- Volume: ~26.1 liter / 6.9 gallon
What's in the Box of NAD Masters Series M33?
Here are the items that are included inside the box of Masters Series M33:
- Integrated streaming amplifier
- 6-feet AC power cord
- Remote control (HTRM 2)
- 4 AA batteries
- 2 WiFi/Bluetooth antennas
- Auto calibration microphone
- USB microphone adapter
- 4 Magnetic feet
- Cleaning cloth
- Quick Setup Guide
- Internet Update Guidlines
- Important Safety Instructions
- Dirac Live Quickstart Guide
- Warranty Card
Official Product Page
Official manufacturer's product page for the NAD Masters Series M33 Integrated Amplifier can be found below:
Official Product Page for NAD Masters Series M33
Warranty
3 Years of parts warranty and 3 Years of labor warranty is generally provided for the NAD Masters Series M33 by the manufacturer.
| General |
| Brand |
NAD |
| Full Model Name |
NAD Masters Series M33 |
| Release Date |
July 2020 |
| Amplifier Type |
Integrated Amplifier |
| Number of Channels |
2 |
| Amp Class |
Class D |
| Amplifier Technology |
Solid State |
| Performance |
| Watts RMS per Channel into 8-ohms |
200 watts |
| Watts RMS per Channel into 6-ohms |
N/A |
| Watts RMS per Channel into 4-ohms |
380 watts |
| Bridged Power per Channel |
640 watts into 8 ohms in bridged mono mode |
| Frequency Bandwidth |
20 Hz-20 kHz |
| THD |
0.003% |
| Minimum Impedance |
4 |
| Signal to Noise Ratio |
120 dB |
| Digital Music |
| Built-in DAC |
Yes |
| DAC Specs |
32-bit/384kHz ESS Sabre |
| Bluetooth |
Yes |
| WiFi |
802.11ac |
| Ecosystem |
| Apple AirPlay |
Yes |
| Apple AirPlay2 |
Yes |
| DTS Play-Fi |
No |
| Chromecast built-in |
No |
| Roon |
Ready |
| HEOS |
No |
| BluOS |
Yes |
| CONNECTIONS |
| Total Analog Inputs |
2 |
| Phono Input |
Yes |
| Optical Digital Inputs |
2 |
| Coaxial Digital Inputs |
2 |
| USB Input |
Yes |
| USB Type |
USB-A(Thumbdrive/External HD) |
| Preamp Outputs |
Stereo RCA, Sub |
| Pre-out / Main-in Loop |
No |
| Headphone Output |
1/4 |
| Subwoofer Output |
Yes |
| Removable Power Cord |
IEC 3-prong |
| PHYSICAL SPECS |
| Height |
134.0mm (5-1/4") |
| Width |
435.0mm (17-1/8") |
| Depth |
448.0mm (17-5/8") |
| Weight |
9.73 kg (21.4 lbs) |
| OTHER |
| Tone Controls |
Yes |
| Screen |
Color TFT Touch |
| Parts Warranty |
3 Years |
| Labor Warranty |
3 Years |