NAD C 338 vs NAD C 399 BluOS-D Detailed Comparison

NAD C 338 vs NAD C 399 BluOS-D

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NAD C 338

Integrated Amplifier | 50 watts RMS into 8-ohms

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NAD C 399 BluOS-D

Integrated Amplifier | 180 watts RMS into 8-ohms

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NAD C 338

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NAD C 399 BluOS-D

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NAD C 338

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NAD C 399 BluOS-D

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NAD C 338 vs NAD C 399 BluOS-D Integrated Amplifier Comparison

In this review, we will be comparing C 338 and C 399 BluOS-D, two Integrated Amplifiers by NAD. Let's have a brief look at the main features of NAD C 338 and NAD C 399 BluOS-D first before getting into our more detailed comparison.

Key Specs	NAD C 338	NAD C 399 BluOS-D
Power	50 watts x 2 channels into 8 ohms and 50 watts x 2 channels into 4 ohms	180 watts x 2 channels into 8 ohms and 180 watts x 2 channels into 4 ohms
Amplifier class	Class D	Class D
Damping factor	300	—
Built-in DAC	Yes	Yes
Phono input	Yes	Yes
Headphone output	1/4	1/4
Bluetooth	Yes	Yes
Weight	4.86kg / 10.7lbs	11.23kg / 24.7lbs
Dimensions (H x W x D)	2-13/16" x 17-1/8" x 12-3/16" 72.0mm x 435.0mm x 310.0mm	4-13/16" x 17-1/8" x 16-7/16" 123.0mm x 435.0mm x 418.0mm

What size room are the NAD C 338 and NAD C 399 BluOS-D 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 338	NAD C 399 BluOS-D
Near-field	Average	Are you nuts?
Small Room	Good	Bad
Mid-size Room	Average	Poor
Large Room	Poor	Good
Very Large Room	Bad	Good

C 338 and C 399 BluOS-D are members of NAD's Classic series of speakers. Below you can find the loudspeakers from this series.

NAD Classic Series History

Model	Watts RMS (8-ohms)	Minimum Impedance	Built-in DAC
NAD C316BEE V2	40 watts	4-ohms	No
NAD C 389	130 watts	4-ohms	Yes
NAD C 399	180 watts	4-ohms	Yes
NAD C 388	150 watts	4-ohms	Yes
NAD C 368	80 watts	4-ohms	Yes
NAD C 328	40 watts	4-ohms	Yes
NAD C 368 BluOS-2i	80 watts	4-ohms	Yes
NAD C 700	80 watts	4-ohms	Yes
NAD C 338	50 watts	4-ohms	Yes
NAD C 3050	100 watts	4-ohms	Yes

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 338 over NAD C 399 BluOS-D

MSRP Price(*)	799USD vs 2,599USD	costs less (*prices may change depending on the seller, location and time)
Signal to Noise Ratio	98 dB vs 95 dB	Higher ratings results in cleaner sound
Built-in Chromecast	Yes vs No	Compatible with Chromecast Streaming
Built-in Chromecast	Yes vs No	Compatible with Chromecast Streaming
Base Surface Area	1348.5cm²/ 209.0inch² vs 1818.3cm²/ 281.8inch²	takes less space in your room
Height	72mm vs 123mm	Easier to fit in smaller spaces

Reasons to choose NAD C 399 BluOS-D over NAD C 338

Built-in Room Correction	Yes vs No	Adjusts audio output to compensate for acoustic anomalies in a listening space
Watts into 8-ohms	180 watts vs 50 watts	Delivers higher power into 8-ohms speakers
Watts into 4-ohms	180 watts vs 50 watts	Delivers higher power into 4-ohms speakers
Total Harmonic Distortion (THD)	0.02% vs 0.03%	Less Harmonic Distortion
USB Input	Yes vs No	Connect Sources via USB
Apple AirPlay	Yes vs No	Compatible with Apple Devices with AirPlay
Apple AirPlay 2	Yes vs No	Compatible with Apple Devices with AirPlay 2
Roon	Ready vs No	Roon Compatibility
BluOS	Yes vs No	Compatible with BluOS Wireless Ecosystem
Max Bit Depth	32-bit vs 24-bit	Play higher resolution range media
Max Sample Rate	384kHz vs 192kHz	Play higher resolution media

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 338 and NAD C 399 BluOS-D differs from each other.

NAD C 338 Inputs

Total Number of Analog Inputs: 2
Phono Input
2 Optical Digital Input
2 Coaxial Digital Input

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 C 338 Back View (Click the image for the larger version)

Outputs

Sub Preamp Outputs
1/4 Headphone Output
Subwoofer Output

Outputs

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

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

What's in the Box of NAD C 338?

Here are the items that are included inside the box of C 338:

Hybrid Digital DAC Amplifier
6-feet AC power cord
2 WiFi antennas
Bluetooth antenna
Remote control (Amp 3)
CR2025 3V battery
Quick Setup Guide
Chromecast Built-in installation instructions
Warranty Information
-inchAttention-inch note

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

Here are the items that come with the 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