Rogue Audio Sphinx v3 vs NAD C 399 Detailed Comparison

Rogue Audio Sphinx v3 vs NAD C 399

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Rogue Audio Sphinx v3

Integrated Amplifier | 100 watts RMS into 8-ohms

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NAD C 399

Integrated Amplifier | 180 watts RMS into 8-ohms

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Rogue Audio Sphinx v...

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NAD C 399

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Rogue Audio Sphinx v...

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NAD C 399

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Rogue Audio Sphinx v3 vs NAD C 399 Integrated Amplifier Comparison

In this review, we will be comparing two different types of amplifiers. Rogue Audio Sphinx v3 is a Integrated Amplifier speaker whereas the C 399 is a Integrated Amplifier with built-in DAC speaker.

Let's have a brief look at the main features of Rogue Audio Sphinx v3 and NAD C 399 first before getting into our more detailed comparison.

Key Specs	Rogue Audio Sphinx v3	NAD C 399
Power	100 watts x 2 channels into 8 ohms and 200 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
Tubes	Hybrid tube (2x 12AU7)	Solid state
Damping factor	1000	—
Built-in DAC	No	Yes
Phono input	Yes	Yes
Headphone output	Yes	1/4
Bluetooth	No	Yes
Weight	—	11.23kg / 24.7lbs
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

What size room are the Rogue Audio Sphinx v3 and NAD C 399 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	Rogue Audio Sphinx v3	NAD C 399
Near-field	Poor	Are you nuts?
Small Room	Average	Bad
Mid-size Room	Good	Poor
Large Room	Average	Good
Very Large Room	Poor	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 Rogue Audio Sphinx v3 over NAD C 399

MSRP Price(*)	1,795USD vs 1,999USD	costs less (*prices may change depending on the seller, location and time)
Watts into 4-ohms	200 watts vs 180 watts	Delivers higher power into 4-ohms speakers
Total Analog Inputs	4 vs 2	More options for connecting Analog sources
Height	0mm vs 123mm	Easier to fit in smaller spaces

Reasons to choose NAD C 399 over Rogue Audio Sphinx v3

Watts into 8-ohms	180 watts vs 100 watts	Delivers higher power into 8-ohms speakers
Buil-in DAC	Yes vs No	Connect digital sources without an external DAC
Bluetooth	Yes vs No	Stream music via Bluetooth devices
USB Input	Yes vs	Connect Sources via USB

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 Rogue Audio Sphinx v3 and NAD C 399 differs from each other.

Rogue Audio Sphinx v3 Inputs

Total Number of Analog Inputs: 4
Phono Input

NAD C 399 Inputs

Total Number of Analog Inputs: 2
Phono Input
2 Optical Digital Input
2 Coaxial Digital Input
USB Input:
- USB-A(Service Only)
HDMI eARC

Outputs

Yes Headphone Output

Outputs

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

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

What's in the Box of NAD C 399?

Here are the items that come with the C 399:

Integrated amplifier
6-feet AC power cord
Remote control (SR 9)
2 AA batteries
Antenna
Quick Setup Guide
Important Safety Instructions
Warranty Card