NAD C 399 BluOS-D vs NAD Masters Series M33 Detailed Comparison

NAD C 399 BluOS-D vs NAD Masters Series M33

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NAD C 399 BluOS-D

Integrated Amplifier | 180 watts RMS into 8-ohms

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NAD Masters Series M33

Integrated Amplifier | 200 watts RMS into 8-ohms

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NAD C 399 BluOS-D

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NAD Masters Series M...

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NAD C 399 BluOS-D

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NAD Masters Series M...

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NAD C 399 BluOS-D vs NAD Masters Series M33 Integrated Amplifier Comparison

In this review, we will be comparing C 399 BluOS-D and Masters Series M33, two Integrated Amplifiers by NAD. Let's have a brief look at the main features of NAD C 399 BluOS-D and NAD Masters Series M33 first before getting into our more detailed comparison.

Key Specs	NAD C 399 BluOS-D	NAD Masters Series M33
Power	180 watts x 2 channels into 8 ohms and 180 watts x 2 channels into 4 ohms	200 watts x 2 channels into 8 ohms and 380 watts x 2 channels into 4 ohms
Amplifier class	Class D	Class D
Built-in DAC	Yes	Yes
Phono input	Yes	Yes
Headphone output	1/4	1/4
Bluetooth	Yes	Yes
Weight	11.23kg / 24.7lbs	9.73kg / 21.4lbs
Dimensions (H x W x D)	4-13/16" x 17-1/8" x 16-7/16" 123.0mm x 435.0mm x 418.0mm	5-1/4" x 17-1/8" x 17-5/8" 134.0mm x 435.0mm x 448.0mm

What size room are the NAD C 399 BluOS-D and NAD Masters Series M33 Amplifiers good for?

The size of the room in which you are planning to use these amplifiers is an important decision factor. Here we have compared their suitability to various sizes of environments considering their max power parameters:

Listening Environment	NAD C 399 BluOS-D	NAD Masters Series M33
Near-field	Are you nuts?	Are you nuts?
Small Room	Bad	Bad
Mid-size Room	Poor	Poor
Large Room	Good	Good
Very Large Room	Good	Good

The sections below take each area in turn: power output, inputs and outputs, features and physical size.

**This post contains affiliate links, and we will be compensated if you make a purchase after clicking through our links. As an Amazon Associate I earn from qualifying purchases.

Reasons to choose NAD C 399 BluOS-D over NAD Masters Series M33

MSRP Price(*)	2,599USD vs 5,999USD	costs less (*prices may change depending on the seller, location and time)
Max Bit Depth	32-bit vs 24-bit	Play higher resolution range media
Max Sample Rate	384kHz vs 192kHz	Play higher resolution media
Base Surface Area	1818.3cm²/ 281.8inch² vs 1948.8cm²/ 302.1inch²	takes less space in your room
Height	123mm vs 134mm	Easier to fit in smaller spaces

Reasons to choose NAD Masters Series M33 over NAD C 399 BluOS-D

Full-color Display	Yes vs No	Displays Album and device Info
Watts into 8-ohms	200 watts vs 180 watts	Delivers higher power into 8-ohms speakers
Watts into 4-ohms	380 watts vs 180 watts	Delivers higher power into 4-ohms speakers
Total Harmonic Distortion (THD)	0.003% vs 0.02%	Less Harmonic Distortion
Signal to Noise Ratio	120 dB vs 95 dB	Higher ratings results in cleaner sound

Inputs and Outputs

The input and output selections that are offered is an important factor when comparing two amplifiers. Here you can find how the I/O selections of the NAD C 399 BluOS-D and NAD Masters Series M33 differs from each other.

NAD C 399 BluOS-D Inputs

Total Number of Analog Inputs: 2
Phono Input
2 Optical Digital Input
2 Coaxial Digital Input
USB Input:
- USB-A(Service Only)
- USB-A(Thumbdrive/External HD)
- USB-B(Service Only0
HDMI eARC
Ethernet Port

NAD Masters Series M33 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 eARC
Ethernet Port

NAD C 399 BluOS-D Back View (Click the image for the larger version)

Outputs

Stereo RCA, Sub Preamp Outputs
1/4 Headphone Output
Subwoofer Output

Outputs

Stereo RCA, Sub Preamp Outputs
1/4 Headphone Output
Subwoofer Output

NAD Masters Series M33 Back View (Click the image for the larger version)

What's in the Box of NAD C 399 BluOS-D?

Here are the items that are included inside the box of C 399 BluOS-D:

Integrated amplifier
6-feet AC power cord
Remote control (SR 9)
2 AA batteries
3 Antennas
Auto calibration microphone
USB microphone adapter
Quick Setup Guide
Internet Update Guidlines
Important Safety Instructions
Dirac Live Quickstart Guide
Warranty Card

What's in the Box of NAD Masters Series M33?

Here are the items that come with the 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