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1 / 11Sennheiser
Sennheiser Pro Audio IE 100 Pro
If you can get past the modular solution to a wired and wireless need, the IE 100 PRO Wireless sounds really nice for the price.
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Key specs
Material Chassis Primary
PlasticResin30%Plastic24%Aluminum18%Metal16%
Plastic appears on 24% of the 50 in-ear monitors we've cataloged (of 39).
Connection Type
Most commonWired-3.5mm95%Bluetooth5%
Bluetooth is the most common — on 5% of the 38 in-ear monitors we've cataloged (of 39).
Ear Tip Material
Most commonSilicone64%Memory foam21%Foam11%Others4%
Memory foam is the most common — on 21% of the 53 in-ear monitors we've cataloged (of 39).
Has Microphone
YesFalse69%True31%
True appears on 31% of the 35 in-ear monitors we've cataloged (of 39).
Build
- Material Chassis Primary
- Plastic
- Sweat Resistance
- No
- Water Resistance
- No
Connectivity
- Connection Type
- Wired-3.5mm, bluetooth
- Bluetooth Codec
- AAC, aptX, aptX Low Latency, SBC
- Bluetooth Version
- 5.0
- Cable Type
- 3.5mm single-ended, detachable
Design
- Ear Tip Material
- Silicone, memory foam
- Color Options
- Black, clear, red
- Ear Tip Sizes Included
- S, M, L, M
- Earbud Form Factor
- In-ear
- Detachable Cable
- Yes
- Wearing Style
- Over-ear (cable up)
- Weight With Case
- 160 g
Microphone
- Has Microphone
- Yes
Sound
- Driver Size
- 10 mm
- Driver Count
- 1
- Driver Type
- Dynamic
- Frequency Response Signature
- Neutral
- Impedance
- 20 Ω
- Sensitivity
- 115 dB/mW
Battery
- Charging Method
- USB-C
- Full Charge Minutes
- 90 min
Features
- Inline Controls
- Yes
Identity
- Model Number
- 509171
Release
- Date
- 2021-03-05
- Msrp Usd
- 149 USD
- Year
- 2021
Lab data
How we test ›Objective measurements from the SoundGuys test lab — overlay other models to see how this one compares.
Sennheiser Pro Audio IE 100 ProSoundGuys Headphone Preference Curve
Measured frequency response (dB relative) against the SoundGuys Headphone Preference Curve. When the measurement goes above the dashed line, that frequency is louder than our preference curve, and when it goes below: it's quieter. Use the curve for comparison purposes only, as your taste may vary.
| Frequency (Hz) | Response (dB) |
|---|---|
| 20 | 0.8 |
| 25 | 1.7 |
| 32 | 2.5 |
| 40 | 3.0 |
| 50 | 3.4 |
| 63 | 3.5 |
| 80 | 3.4 |
| 100 | 3.1 |
| 125 | 2.5 |
| 160 | 1.7 |
| 200 | 0.8 |
| 250 | 0.0 |
| 315 | -0.6 |
| 400 | -1.5 |
| 500 | -2.3 |
| 630 | -2.3 |
| 800 | -1.2 |
| 1000 | 0.0 |
| 1250 | 1.5 |
| 1600 | 2.7 |
| 2000 | 3.6 |
| 2500 | 4.1 |
| 3150 | 4.5 |
| 4000 | 4.8 |
| 5000 | 6.4 |
| 6300 | 6.3 |
| 8000 | 5.3 |
| 10000 | 7.1 |
| 12500 | 3.6 |
| 16000 | -7.2 |
| 20000 | -24.4 |
Sennheiser Pro Audio IE 100 Pro
Passive isolation (dB) with ANC off — how much ambient noise the fit blocks on its own. Higher on the chart means more attenuation.
| Frequency (Hz) | Attenuation (dB) |
|---|---|
| 21 | 5.5 |
| 26 | 4.9 |
| 33 | 4.8 |
| 41 | 5.1 |
| 52 | 5.4 |
| 65 | 5.5 |
| 82 | 8.9 |
| 103 | 6.5 |
| 130 | 7.9 |
| 163 | 8.8 |
| 205 | 8.9 |
| 259 | 9.1 |
| 325 | 11.0 |
| 410 | 14.1 |
| 516 | 13.3 |
| 613 | 12.7 |
| 772 | 12.7 |
| 972 | 15.7 |
| 1220 | 14.7 |
| 1540 | 16.5 |
| 1940 | 13.6 |
| 2440 | 19.5 |
| 3070 | 18.0 |
| 3870 | 15.3 |
| 4870 | 16.9 |
| 6130 | 14.9 |
| 7720 | 16.5 |
| 9720 | 7.8 |
| 12200 | 3.9 |
| 15400 | 15.8 |
| 19400 | 23.3 |
SoundGuys review
Isolation3.1
Comfort & fit4.2
Connectivity9.0
Design8.5
Portability8.5
Features7.5
The verdict
This unique product by Sennheiser sounds great, and offers a lot of flexibility for its price. You can use it on stage or take it to go and casually listen to music.
✓Liked: SBC, AAC, aptX, aptX Low Latency, Bluetooth 5.0 and 3.5mm connections, Portable, Very good sound quality
✕Could be better: No IP rating, Bluetooth connector module is annoying, Mic and controls only on Bluetooth connector, Uncomfortable over long sessions
Owners
How we verify ownersNobody who owns the Sennheiser Pro Audio IE 100 Pro has written in yet.
Owner notes are not paid for, not solicited from specific owners, and not edited by us. The commission SoundGuys may earn on this page comes from retail links, never from notes.
Own the Sennheiser Pro Audio IE 100 Pro?
Three answers, four quick reads, one sentence nobody tells you before buying. Shown under a pseudonym.
Features & Opinions
More from the team ›Commentary and deep dives from the SoundGuys editorial team.
The Sennheiser Momentum 5 earbuds make your AirPods look like e-wasteDead batteries kill more earbuds than anything else. Sennheiser just fixed that.
Adam BirneyManaging Editor3 headphones I would buy instead of the AirPods Max 2These premium headphones deliver class-leading ANC, longer battery life, and more flexibility for less money.
Dave CarrVideo Producer/WriterThe end of budget audio's best bargain: RIP HD 6XXIt was one hell of a run.
Christian ThomasEditor-at-largeWired vs wireless headphones: Which should you buy?Wired headphones do not automatically sound better.
Tom TriggsContributorThe 5 best headphones to look forward to in 2026Strap in — we're in for a wild year.Tom TriggsContributorDon't buy wireless headphones without USB audioIt's way past time.Christian ThomasEditor-at-large
Adam BirneyManaging Editor3 headphones I would buy instead of the AirPods Max 2These premium headphones deliver class-leading ANC, longer battery life, and more flexibility for less money.Dave CarrVideo Producer/WriterThe end of budget audio's best bargain: RIP HD 6XXIt was one hell of a run.Christian ThomasEditor-at-largeWired vs wireless headphones: Which should you buy?Wired headphones do not automatically sound better.Tom TriggsContributorThe 5 best headphones to look forward to in 2026Strap in — we're in for a wild year.Tom TriggsContributorDon't buy wireless headphones without USB audioIt's way past time.Christian ThomasEditor-at-largeMore In-Ear Monitors
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