TempoTec IM05 Review – Uniquely Mainstream

The $139 TempoTec IM05 is a 4+1 iem with fabulous imaging qualities that may have a tad too much bass for some.

The TempoTec IM05 was kindly supplied by the manufacturer for my review – and I thank them for that. You can purchase it from TempoTec Official Store .

Introduction

TempoTec’s claim to small fame came with their budget dongle DACs that were unbeatable at their price. For example, their $40 Sonata HD Pro came with all accessories to even work with iPhone.

Recently, the company has expanded gear wise and simultaneously moved out of the budget realm. They now feature the excellent V6 dap, the great Serenade X desktop streamer, and the March III M3 desktop DAC/amp. One device per category, all mid-fi, and all surprisingly good.

With the IM05 (IM stands for “Impromptu”, 05 for the number of drivers), TempoTec enters yet another category: earphones. And TL;DR, they do another good job. No rookie mistakes, the IM05 is a mature product. It was actually designed to harmonize with the V6 DAP.

Specifications TempoTec IM05

Physical Things and Usability

In the box are the earpieces with plenty of silicone tips, a fancy cable, a very roomy storage case, and the paperwork. The earpieces are large but light, they are comfortable, fit me well, and they isolate well, too. The cable is gorgoeous both haptically and functionally (“pliable”).

Tonality and Technicalities

The TempoTec IM05 is warmish sounding with a good depth and headroom and a decent timbre (considering it has 4 BAs), but with a “broad” lower mid bass that smears into the lower midrange. It sounds nothing like the graph implies, paradoxically.

Yep, the bass is the polarizing feature, with its strong cat buckle (in the graph) that culminates at the transition mid-bass/sub-bass. This makes for a thick and somewhat punchy midbass, but with a rather subtle impact and intensity that does not torture my eardrums. The Azul Performer 5 does the opposite.

TempoTec offer this kind of bass lift also in their V6 DAP and March III M3 DAC/amp. It appears to be part of their house sound. In fact, the $4000 Fir Audio iems offer a similar bass impact.

Bass lines are generally on the rich side. Extension into the sub-bass is average but, paradoxically, the lowest frequencies are leaner than the mid bass. There is always a subtle but never annoying rumble down there.

The bass smears into the midrange which has the positive effect that it re-inforces male and female voices alike, but it also cuts into the midrange transparency. Strangely enough, vocals are not recessed but rather intimate, despite the mickey mouse ears in the upper midrange’s graph segment.

There is also no shoutiness. I can only explain this by the balance between elevated bass and upper midrange in combination with the recessed treble.

Somebody tuned these iems by ear and not by graph, obviously. And it works. Vocals are very well rendered and nicely layered, they have a 3D effect and are almost holographic. They are neither thick or thin but are nicely intimate and rather articulate.

Treble is subtle overall, the extension is..well..not well extended. The high notes are somewhat swept under the carpet. Older listeners like me won’t probably care that much.

That combination of modest treble and extension and bass lift make for a deep but not too wide (but wide enough) stage. Midrange resolution is excellent as long as there is no strong bass superimposed. Separation and layering are also very good, not to forget the outstanding imaging. When listening to concerts with interaction of musicians and audience, I always feel I am in the building or stadium.

In comparison, the $150 single DD Sennheiser IE 150 are more fluid with a more emphasized midrange, but they have flatter staging and less resolution. The LETSHUOER S12 is less holographic with lesser imaging but somewhat smoother (after micropore tape mod).

The IKKO OH10 on our Wall of Fame plays vocals leaner, sharper, and more recessed, at similar imaging qualities. The Dunu Talos has a wider stage but lacks depth in comparison, and the notes are leaner. The first model in my collection to beat the I M05 is the $650 LETSHUOER EJ07 in that its sonic presentation is somewhat smoother with better rounded notes, but the IM05 is still better imaging.

The discontinued $699 Dunu Zen is better resolving but has an upper midrange glare. I prefer the IM05 over the lesser imaging and resolving Moondrop KATO. In summary, the IM05 are also head and shoulders above most $150-200 ChiFi fare I have tested, at least in terms of imaging.

Concluding Remarks

The TempoTec IM05 is an enjoyable 4+1 iem with an agreeable sonic signature. I have auditioned way more than 500 iems, but never had exactly this listening experience, so it is somewhat mainstream with new features, particularly the bass (though it may be considered being too boosted by some).

Since it is the company’s first iem, many analysts may “laud a good initial effort” while tacitly recommending the reader to wait for the “Pro” version. This is not necessary for the IM05, TempoTec got it right on the first try, as is the case with their V6 dap, Serenade X streamer, and March III M3 DAC/amp.

It was a pleasure testing the IEM05, an outright inspiration following my bundle of 10 Chifi iems that landed on my desk just before Christmas. TempoTec keep surprising.

Until next time…keep on listening!