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.

Solid-state 'v' Tubes

A solid-state amplifier uses electronics such as diodes and transistors to amplify the music signal. A tube amp uses valves/vacuum tubes to do the same job.

There is a noticeable sound difference between the two methods. Some feel that tube amps create a warmer, more musical tone. Some companies choose to build ‘hybrid’ models that combine the two methods.

What is a phono-stage?

A phono stage (also known as a phono pre-amp) provides the connection between the record player and an amplifier.

When vinyl was the defacto standard for audio recording, the phono stage was built-in to receivers and amps, allowing direct connection of a turntable.

It will improve the depth and quality of music.

DAC (Digital-to-Analogue Converter)

DACs convert digital information, stored or streamed by computers, into music we can hear through speakers or headphones.

Every device that’s a source of digital sound has a built-in DAC (TVs, games consoles, CD players, phones, portable music players etc). Dedicated external DACs sound much better than standard DACs used in digital devices such as phones.

DSP (Digital Signal Processing)

Digital signal processing (DSP) is the use of digital processing, such as by computers or more specialized digital signal processors, to perform a wide variety of signal processing operations. When it comes to audio the overuse of DSP can result in an over-compressed, unnatural sound.

File formats

MP3 – this is the most popular format, every device in the world can use it.

DSD – Direct Stream Digital is a very high-quality audio format, better than CD quality. The higher the number (sample rate), the better the recording – DSD64, 128, 256, 512 and 1024.

PCM – Pulse Code Modulation is the most common format for CDs and DVDs.

DXD – Digital eXtreme Definition is a very high-quality PCM format. It was developed to edit hi-res (high quality) recordings recorded in DSD.

Hi-res audio support is state-of-the-art with True Native® playback. It handles PCM data to 32-bit/768kHz, DSD up to DSD512 and single and double speed DXD.

Thanks to the Burr-Brown DAC chip’s four-channel True Native design, PCM and DSD take separate pathways – this enables DSD, as well as PCM, to remain ‘bit-perfect’ in its native form right through to analogue conversion. This is not the case with all DAC devices from other brands – even if DSD compatibility is stated, many such DACs convert DSD signals to PCM.

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.

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.

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.

Enjoy your music, your way.

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


iFi audio USA (West Coast)


Apos Inc.


Music Direct












Audio Advisor


High Definition Tape Transfers

New Jersey

Bloom Audio

New Jersey

Audio 46

New York

Turntable Lab NY Storefront

New York


North Carolina

Moon Audio

North Carolina


North Carolina


HIDEF Lifestyle


World Wide Stereo


World Wide Stereo


iFi audio USA (East Coast)


USA-Audio Exchange

Wireless InputBluetooth (aptX)
Digital InputUSB (DSD512/768kHz/2xDXD)
Coaxial (192kHz)
Optical (192kHz)
Analogue InputPhono(MM/MC Low/MC High/Line 3)
Line 1
Line 2
3.5mm (share with Line 2)
Loudspeaker Output
3.5mm Headphone Output
6.3mm Headphone Output

(Output impedance 3.5mm < 3 Ohm)
(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 bandwidth10Hz ~ 60kHz
Frequency Response10Hz ~ 80kHz
Signal-to-Noise Ratio> Amplifier 101dB (@ max output)
> Phono MM: 90dB(A)
> Phono MC: 80dB(A)
DAC Dynamic Range> 113dB(A)
Tone ControlBass(100Hz) +/-8dB
Treble(10KHz) +/-8dB
Analogue Signal Processing (ASP)XBass
3D Holographic
Phono Gain38, 50, 62dB
RIAA Accuracy<0.5dB
Tubes2 x ECF82
4 x EL84X
Digital Section
DSD 512/256/128/6424.6/22.6/12.4/11.2/6.2/5.6/3.1/2.8MHz
FiltersMinimum Phase (PCM 192/176.4/96/88.2/48/44.1kHz)
Bit Perfect (DXD/PCM 768/705.6/384/352.8)
Analogue (DSD)
Power SupplyAC 100V-240V
Power consumption75W
~0.1W (Standard mode)
Dimensions(W x H x D) 300 x 153 x 226mm

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)

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

Bates Review

(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.

Dwayne Carter, Steven and Enjoy the music

(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)

Liam from Ireland enjoying the Retro 50

Got mine recently as Livingroom system. Very happy indeed. Playing Qobuz mainly via a Kokkia Apt-X Bluetooth adapter from my IPad 2. Very musical. No listening fatigue. No gripes at all in fact.


(Click name to read original review)

Stereo50 brings out the beauty of the music being played

I could immediately hear Dee-dee of Dexter Laboratory say her catch-phrase “Oooooooh, what does this button do?”. So many buttons and switches. Cool! The overall finish is excellent. The cover gives you a peek at the tubes. My first tube amplifier…..The iFi website mentions a study done on the effects of adding tubes to your hifi system. With the Stereo50 I feel I was part of the study and belong to the group where the music invites you to listen longer and influenced your movements such as tapping your feet. I am enjoying my music independent if it is coming from a LP, CD or radio. The amplifier is my introduction to tubes…..somehow it attracts your attention, because the music it makes sounds beautiful. There is definitely a sweetness in the sound…..The amp is very well balanced. You notice this with everything. It is a well thought out all-in-one concept. Everything is not just added and put on top of each other, which maybe would have doubled its price. It is integrated in the real sense of the word. The end result is a very beautiful, sweet pure natural sounding amplifier that successfully combines old and new technologies and offers an extravaganza of music sources to listen to.”

Pros: Sweet pure natural sounding amplifier that successfully combines old and new technologies and offers an extravaganza of music sources to listen to

Cons: it’s hard to think of cons with this kind of performance and high value for money


(Click name to read original review)