Field Test · Studio Gear Review
Sennheiser HD-300 Pro
In-depth technical evaluation of Sennheiser’s HD-300 Pro closed-back headphones
Sennheiser
- Monitor Headphones
- Perfect for monitoring
- Ideal in noisy surroundings
- This is what customers who viewed this product bought
- Accessories & matching items
- 107Customer ratings
- Compare options
- Smart Navigator
Spec Sheet
- Closed
- Circumaural
- Impedance: 64 Ohms
- Nominal sound pressure level: 108 ± 3 dB SPL / 1 V rms / 1 kHz
- Transmission range: 6 -25000 Hz
- Harmonic factor <0.1% at 1 kHz
- Boundary sound pressure level: 100 dB
- Nominal load capacity: 500 mW
- Pressing force: 6.0 N ± 0.75 N
- Single-sided cable in 1.5m length with 3.5 mm jack plug
- Weight without cable: 297 g
- Includes 6.3 mm adapter
Studio Log
| Available since | September 2018 |
|---|---|
| Item number | 447835 |
| Sales Unit | 1 piece(s) |
| Design | Over-Ear |
| System | Closed Back |
| Impedance | 64 Ohms |
| Frequency range | 6 Hz – 25000 Hz |
| Adaptor | Yes |
| Colour | Black |
| Sensitivity | 108 dB |
| Max. SPL | 108 dB |
| Type Of Connector | Mini Jack |
| Adapter | Yes |
| Weight | 297 g |
| Replacable Cable | Yes |
Demo Footage
Field Photography
QC Pass — Field Test
Customer Review Summary
Introduction
The Sennheiser HD-300 Pro, launched in September 2018, is a closed-back, over-ear headphone designed for professional studio use, priced at approximately £145. Its 64 Ohm impedance and broad frequency response from 6 Hz to 25,000 Hz target users requiring good noise isolation and a neutral audio profile for tasks such as tracking, mixing, and general monitoring.
Build and Design
The HD-300 Pro is constructed predominantly from plastic, making it lightweight at 297 grams without cable. Despite the plastic construction, it offers robust assembly without any creaking or looseness. The design is simple and functional rather than premium or flashy. This practical approach extends to its folding mechanism: the ear cups can fold inwards and flatten for compact transport.
Included in the package is a 1.5-metre single-sided cable with a proprietary connector secured by Torx T9 screws, along with a 6.3 mm adapter. While the cable is replaceable, the proprietary nature complicates finding third-party alternatives, which is an inconvenience considering this component’s vulnerability to damage over time.
The headband features a well-padded top cushion that avoids pressure on the frontanelle area, contributing to overall comfort. Initial users report a somewhat tight clamping force that softens after a gentle mechanical ‘break-in’ by placing the headphones on a head-sized object overnight.
Comfort and Fit
Comfort is a strong suit of the HD-300 Pro. The circumaural ear pads are generously sized and soft, fitting large ears comfortably without excessive pressure or heat build-up during extended use. Several users have worn them for hours without discomfort or fatigue. The closed-back design also means ears can become slightly warm after several hours, but this is typical for this headphone category.
The clamping force may feel firm initially but usually relaxes with time. It is advisable not to extend the headband excessively to prevent unwanted pressure beneath the ears. The detachable ear pads click neatly into place, although care is needed during removal due to a plastic ring integrated into the fastening system.
Sound Performance
The HD-300 Pro delivers a well-balanced sound signature that sits between an analytical reference and a slightly warm, musical profile. The bass response is strong and impactful without being overwhelming, though some report the sub-bass region as somewhat subdued in comparison.
Midrange frequencies are clear and well-defined, leaning toward neutrality with minimal coloration. Treble is present and detailed but not exaggerated; sibilance is managed carefully with a slightly recessed upper midrange peak between 6 and 10 kHz to avoid harshness. Frequencies above 10 kHz are somewhat rolled off, which can diminish the sense of airiness but improves listening fatigue over long sessions.
Overall, the HD-300 Pro offers a clean and detailed soundstage for a closed-back design, with excellent stereo imaging making it suitable for tracking and casual mixing. However, it may fall short for critical mastering work where extended frequency extremes and an ultra-neutral response are necessary.
Frequency Response and Clarity
- Frequency range: 6 Hz, 25,000 Hz
- Sensitivity: 108 dB at 1 kHz with 1 V RMS
- Harmonic distortion below 0.1% at 1 kHz
These specifications contribute to a clear and detailed listening experience that maintains dynamic accuracy across bass, mids, and highs.
Noise Isolation and Portability
The closed-back design, combined with circumaural ear pads, provides very good passive noise isolation. High-frequency ambient noise is effectively dampened, allowing users to monitor at lower volumes and reduce ear fatigue. Sound leakage is minimal, making the headphone suitable for use in studio environments and noisy live settings.
The headphones lack a carrying pouch but compensate with their foldable design, making them compact for transportation. However, their plastic build does not feel as premium as some competitors, though it remains robust enough for frequent use.
Cable Considerations
The supplied 1.5-metre straight cable is fitted with a small coiled section near the ear cup designed to absorb accidental tugs and reduce microphony. While functional, users find the cable length marginal for studio setups involving some distance between headphones and audio interface or mixer. Additionally, the proprietary connector system limits options for cable replacement or upgrades, which is unfortunate given that cables often suffer the most wear.
Comparison With Similar Models
The HD-300 Pro is often compared to the Sennheiser HD-280 Pro as well as competitors such as Beyerdynamic DT-770 Pro (80 Ohm) and Shure SRH1540. Compared to the HD-280, the HD-300 offers a more refined bass, less midrange scoop, and improved overall resolution, justifying its higher price point.
While the DT-770 Pro provides increased comfort with velour ear pads and good sound isolation, it may have harsher bass and treble at elevated volumes. The Shure SRH1540 emphasizes comfort and a more relaxed midrange but comes at a significantly higher price.
Strengths and Weaknesses
- Strengths: Excellent comfort for extended use, strong passive noise isolation, balanced and detailed sound signature, robust folding design, replaceable ear pads and headband cushions
- Weaknesses: Proprietary cable connector complicates replacements, cable length could be longer, initial clamping force may be high for some users, lack of carrying pouch
Conclusion
The Sennheiser HD-300 Pro is a well-crafted closed-back headphone suited for musicians, producers, and audio engineers needing accurate monitoring without an exorbitant price tag. It combines neutral sound with impressive isolation and long-lasting comfort. While it may not be the first choice for mastering loud, richly detailed mixes, it excels as a versatile monitor and daily workhorse in quieter studio or field environments.
Its lightweight plastic construction strikes a good balance between durability and portability. Those requiring fully swappable cables or longer lengths will need to consider alternatives or external extensions. However, the HD-300 Pro remains a commendable option within its price range and use case.
