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iFi Audio – micro iTube2 Mini Tube Preamplifier
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Product Summary:
The micro iTube2 is a tube output stage, preamp, buffer, and impedance matching device, all rolled into one. If that sounds a bit technical, it means injecting a tube character into your stereo sound and it will work well with whatever device you choose to connect.... Click To Read More
Trial Period 45 Days
Countries Shipped North America
Break-In Time 100 Hours
Have Questions? 844-462-8346
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iFi Audio – micro iTube2 Mini Tube Preamplifier


The micro iTube2 is a tube output stage, preamp, buffer, and impedance matching device, all rolled into one. If that sounds a bit technical, it means injecting a tube character into your stereo sound and it will work well with whatever device you choose to connect.


Product Description

The magic of tubes

The micro iTube2 is a tube preamplifier stage, buffer, and impedance-matching device, all rolled into one.

Put simply, whether you are listening to vinyl, CD, or a digital stream, it will add depth, bass, and personality to your playlist.

Spoilt for choice.

iFi gives you options with the iTube2. You have a choice of three key sonic signatures:

  • Single-Ended Triode
  • Push-Pull Tube
  • Classic Tube

There is no right or wrong. It’s all about what you prefer in the moment.


And the choices continue. iFi adds its sonic fining-tuning nuances to your listening.

  • xBass+® cleans and restores the bass to give you a richer, deeper sound,
  • 3D+® opens up your music to bring a live-concert atmosphere into your living room.


Hear the difference

The iTube2 delivers that special tube sound – it adds warmth, removes hardness, and emphasis to instruments and vocals.

Give it a whirl in your set-up. Hear the Tube difference.

Choose the ‘magic’ of SET, Push-Pull, or Classic Tube sound – three different sonic signatures. There is no right or wrong, it’s whatever you prefer!
iFi has used the best tube possible. The GE5670 made by General Electric. Nothing comes close for sound quality.

DirectDrive® equals a direct signal path which means less signal degradation. This direct signal path is unequaled in audio and is the reason why the sound is so ‘true’. Dig deeper here.

3D+ Holographic® delivers an immersive, deep soundstage. Check it out here. XBass+® delivers a deep, tighter bass sound. Discover the details.


iFi Itube2 class A Tube/Preamp/Buffer Overview of a Blooming Flower?


iFi iTube2 is a Tube PRE-AMP designed for large home systems, while iPower is a power converter that comes in handy if your source doesn’t come with a quality power brick, or if you need a replacement power brick.

There will also be a bonus product features in this review, the DC iPurifier 2. Since I have no comparisons for any of those products, I’ll try comparing them with other options out there throughout the review, but there will be no special comparison section within the review…

Must Have

Will enhance your sound stage experience on any gear. you will be amazed! Give 2 weeks break-in period before any critical listening and playing with settings. Instruments had their own space, rock solid images. Get up and walk around them. Of course for that effect your gear probably needs good synergy!

Tiny audio hardware that produces great sound…

1st time to use this brand. Bought without auditioning, after reading so many rave reviews.
Sound was very good, soundstage expands sideways and sound stage deepens considerably. I was also using a new power amplifier so I cannot ascertain if the great sound was due to the latter or a combination of both.

Was surprised that this unit was that tiny…but it runs fairly warm, not sure if I need to raise it above the table high enough to facilitate heat dissipation.

One odd phenomenon:
This unit produces no sound if I turn it on 1st, before I turn on the power amplifier, DAC etc…
Now I turn on everything first, before turning on this unit. When the vacuum tube is ready (need to wait about a minute), when the tiny hole that shows red turns to yellow, then sound will come out of the speakers.
Not sure if other users have the same issue or not.

Easy A/B comparison of unaltered signal vs “tubified” sound

Pros – Simple setup, Easy A/B comparison of unaltered signal vs “tubified” sound. Ability to customize audio parameters to suit your current headphones from most any source, rather than constantly swapping headphones during your listening sessions.

Cons – While still quite portable, not battery powered like the iDSD & iDSD Black Micros for TRUE portability during travel.

iTube2 smooths out digital sound for better listening

Using this as a tube buffer stage and it works great by adding a nice smooth analog sound to digital. I recommend it for anyone who wants ‘tube’ sound on a budget.



Tube: NOS GE 5670×1
Maximum output: > 7.75V (>+20dBu)
SNR: 119dB(A) re. 2V, buffer, 0dB Gain
DNR: 131dB(A) re. +20dBu, buffer, 0dB Gain
THD & N: < 0.009% (re. 2V, buffer, 0dB Gain, A- weighted)

Frequency Response:
< 10Hz -to > 200kHz (-1dB)
20Hz – 20kHz (+/-0.003dB)

Input impedance:
1M ohm Direct Tube Buffer
100k ohm Pre-Amplifier
with Volume Control

Output stage output impedance: <1 ohm
Corrected output impedance: <150 ohm
Input voltage: AC 100-240V, 50/60Hz
Power consumption: <4W idle, 10W max
Dimensions: 175(l) x 67 (w) x 28 (h) mm
Weight: 278g (0.61lbs)


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