Retro Stereo 50
Retro Stereo 50

Retro Stereo 50

Looking for a one-box unit with classic styling?

The Retro Stereo 50 is classic hi-fi quality fused with contemporary tech in a compact, retro package.

A timeless modern classic

The Retro Stereo 50 (and LS3.5 bamboo speakers!) create an old-school yet modern vibe for your living or office space.

Classic, compact and cutting-edge, it’s an integrated stereo tube (valve) amplifier with a hybrid output stage and an output of 25W per channel.

ifi audio Retro Stereo 50

All mod cons

As well as analogue inputs including an excellent phono stage to connect a turntable, it incorporates a hi-res DAC with digital inputs to play music from computers and smart devices.

And there’s Bluetooth, too, for those who prefer to stream wirelessly from their smartphones and tablets.

Superior sonics

We’ve also added our signature sonic ‘optional extras’.

XBass+ cleans up and restores a richer deeper bass line.
3D+ helps to recreates the spaceness of a live stage performance.

Adjust bass and spatial performance with ease as all signals are processed in the analogue domain.

ifi audio Retro LS3.5

Pitch perfect

Listen via your favourite headphones.

Or add a pair of connected speakers. Our LS3.5 bookshelf speakers are designed specifically to go with the Retro 50.

Whatever you choose, you’ll be immersed in gloriously rich, pitch-perfect, expressive sound.

Enjoy your music, your way.

Stream from your set top box, smart device or computer via S/PDIF or USB port.

Hi-Res True Native® playback for all music formats from MP3 to DSD512, PCM768 and 2xDXD.

A class act refined. Every nuance defined. All-new Burr Brown Soundplus® J-FET type amplifier now beats at the heart of the Class A TubeState®.

This new circuit significantly reduces the loading seen by the main amplification circuit which improves the circuit inherent linearity while allowing it to drive even punishing 600 ohm studio inputs with impunity. The power supply filtering has been increased 5X in value.

More than ever, one can hear ‘into’ the recording itself with the blackest of backgrounds and every nuance, inflection is picked up by the system.

The 3DHolographic+® for speakers takes high end systems to another level.

It corrects spatial distortions and increases the width of the soundstage beyond that of the speaker placement.

XBass+® for speakers. No degradation in sound quality.

Provides adjustable levels of bass control to enhance listening enjoyment through speakers that have limited bass extension.



Wireless Input

Bluetooth (aptX) 1

Digital Input

USB (DSD512/768kHz/2xDXD) 1
Coaxial (192kHz) 1
Optical (192kHz) 1

Analogue Input

Phono(MM/MC Low/MC High/Line 3) 1
Line 1 1
Line 2 1
3.5mm (share with Line 2) 1


Loudspeaker Output 1
3.5mm Headphone Output 1 (Output impedance 3.5mm < 3 Ohm)
6.3mm Headphone Output 1 (Output impedance 6.3mm < 6 Ohm)

Audio Section

Power output (Music) > 25W(majority Class A)
Total Harmonic Distortion(THD) < 0.2% (@ 2.83V/1W)
Output bandwidth 10Hz ~ 60kHz
Frequency Response 10Hz ~ 80kHz
Signal-to-Noise Ratio > Amplifier 101dB (@ max output)
> Phono MM: 90dB(A)
> Phono MC: 80dB(A)
DAC Dynamic Range > 113dB(A)
Tone Control Bass(100Hz) +/-8dB
Treble(10KHz) +/-8dB
Analogue Signal Processing (ASP) XBass, 3D Holographic
Phono Gain 38, 50, 62dB
MM 220pF//47k
MC 200pF//330R
RIAA Accuracy <0.5dB
Tubes 2 x ECF82; 4 x EL84X

Digital Section

PCM 768/705.6/384/352.8/192/176.4/96/88.2/48/44.1kHz
DSD 512/256/128/64 24.6/22.6/12.4/11.2/6.2/5.6/3.1/2.8MHz
DXD 768/705.6/384/352.8kHz
Filters Minimum Phase (PCM 192/176.4/96/88.2/48/44.1kHz)
Bit Perfect (DXD/PCM 768/705.6/384/352.8)
Analogue (DSD)


Power Supply AC 100V-240V
Power consumption 75W
~0.1W (Standard mode)
Dimensions (W x H x D) 300 x 153 x 226mm
Weight 5.8kg

We’re working on it — check back soon!


iFi Audio Retro Stereo 50 Review

“…the Retro Stereo 50 is one of the most beautiful integrated tube amplifiers on the market.”

“you can see how much iFi Audio care about every detail simply by opening the Retro Stereo 50”

“Not only does the Retro Stereo 50 offer a lot of input options, but it also has many built-in features including a phono pre-amp for both moving magnet and moving coil cartridges, a digital-to-analog converter (DAC), and a headphone amp.”

“The mid-range is upfront and present which adds a beautiful clarity and enhances the sound stage. The highs are a little bright, especially with the LS3.5 or other bookshelf speakers, however, with the tone control, you have the ability to dial this back if necessary. Overall, the Retro Stereo 50 is extremely well-balanced and will be great for listening to your favorite vinyl, digital audio, or even Bluetooth playback.”

(Click name to read original review)
More reviews…
More reviews…

Review IFI RETRO STEREO 50 All In One Tube Amplifier Vinyl Community with Pros & Cons

(Click name to read original review)

iFi Retro Stereo 50 is the only tube amp you’ll ever need

iFi has been on a roll lately with some amazing audio products…From everyday music lovers to audiophiles, the iFi Retro 50 is well equipped to please everyone with its ample features and phenomenal sound…The bottom line is the Retro 50 is a compelling and powerful headphone and speaker amplifier.

(Click name to read original review)

Retro 50 featured in Haute Fidelité (French) magazine

Verdict: iFi Audio managed a great achievement, both for aesthetics as for the technical design. Rarely will a boombox played at this point the role of bridge between the hi-tech and vintage, with admirable relevance, as ergonomics and audio performance. A try!”

French customers, head on over to Haute Fidelité to download your digital copy today!

Haute Fidelité and Elite Diffusion (iFi:France)

(Click name to read original review)

Retro coolness at vintage pricing

My first tube experience in many years!……Hour after hour, day after day, the combo of the Stereo 50 and LS3.5 speakers provided me with clear and balanced sound……So what is my overall sound impression of the Stereo 50 and LS3.5 system? Balanced, controlled, and neutral……What do you want to plug in? Your PC or Mac? No problem! Stream music from your phone via Bluetooth? Done! CD player, DVD player, or Blu-ray player? Check, Check and Check. What about pure analog? You know who you are. Dusting off your old turntable and record collection? The iFi Audio Stereo 50 has an extensive collection of refinements for virtually any turntable you choose to connect……So how do I wrap up my experience with the iFi Audio Stereo 50 and LS3.5 speakers? Well, I was sad to return them and miss having the ability to listen to virtually any source, in any format, at any time.
(Click name to read original review)

The Retro Stereo 50: ‘olde + new fusion, iFi just knocked it outta the park’

Sean Fowler of Zero Fidelity kindly made a very comprehensive overview/review of the Stereo 50.

Hop skip and jump to 9.10 if you wish to get to the crux of the review. We can only concur the Stereo 50 is ‘fun, fun, fun.’ Listening to it just puts a smile on your face. J

ps: we loved the fact that the headphone section was noted for being a big hit. Yes, the HE-1000 absolutely sings (swings?) with the Stereo 50

(Click name to read original review)