Description
Sennheiser HD 300 PROtect Closed-Back Monitoring Headphones
Hear with Precision. Protect Your Ears. Perform at Your Best.
Experience the perfect blend of high-resolution sound, professional-grade comfort, and intelligent hearing protection with the Sennheiser HD 300 PROtect. Designed for sound engineers, musicians, and production professionals, these closed-back monitoring headphones deliver pristine, distortion-free audio while actively protecting your ears from harmful peak sound levels.
At the core of the HD 300 PROtect is Sennheiser’s patented ActiveGard™ technology, which smartly manages unexpected audio peaks above 110 dB. Instead of cutting the sound entirely, it reduces dangerous levels to a safe, clear signal—ensuring complete control without compromising fidelity.
Tailored for accuracy, the HD 300 PROtect features a linear frequency response and high-sensitivity transducers for ultra-precise sound reproduction. Whether you're in the studio or on stage, its noise-isolating closed-back design and refined acoustic tuning inspired by the HD 250 linear offer detailed, immersive audio in any environment.
Comfort is just as important as clarity. With soft, viscoelastic earpads, optimal pressure distribution, and long-lasting materials, these headphones are built for extended use without fatigue. Plus, they feature exchangeable cables with Sennheiser’s trusted system connector—making them a durable, professional companion for daily work.
🔑 Key Features
-
ActiveGard™ Technology: Reduces audio peaks safely without muting sound
-
High-Resolution Sound: Accurate, linear audio for critical monitoring
-
Exceptional Comfort: Soft padding and pressure-balanced fit for long sessions
-
Noise Isolation: Closed-back design effectively blocks ambient noise
-
Built to Last: Durable materials and modular components for longevity
🛡️ Why Choose the HD 300 PROtect?
-
Ideal for professional recording, live monitoring & broadcasting
-
Protects your hearing while preserving clarity
-
Trusted by industry pros for performance and reliability
General:
Wearing Style: Dual Ear with Headband
Foldable: Yes
Earpiece Swivel: No
Earpiece Design: Over-Ear (Circumaural)
Open/Closed-Back: Closed-Back
Sound Field: Stereo
Color: Black / Silver
Audio Performance:
Driver Type: Dynamic
Impedance: 64 Ohms
Maximum SPL: 123 dB at 1 kHz
Maximum Power Handling: 500 mW
Volume Limiting: Yes, limited to 110 dB max
Active Noise Cancellation: No
Controls & Microphone:
Built-In Controls: No
Built-In Microphone: No
Connectivity:
Audio Connector: 1x 1/8" (3.5 mm) TRS
Included Adapter: 1/4" (6.3 mm) TRS
Cable Design: Detachable / Straight
Cable Length: 4.92 ft (1.5 m)
Physical Specs:
Weight: 10.5 oz (297 g, without cable)
Packaging Info:
Package Weight: 1.16 lb
Box Dimensions (L x W x H): 9.7 x 7.6 x 3.5 in
In The Box
Sennheiser HD 300 PROtect Closed-Back Active Gard Studio Monitor Headphones
4.9' Headphone Cable
1/4" Adapter
Warranty Period: 2 Year from the date of Invoice
Covered: Manufacturing Defects Only
Website: https://en-in.sennheiser.com/service-support-contact-service-centers-in-india
Contact No: 1800 22 36 32
Email Id: in-info@sennheiser.com
Sennheiser is a well-known brand in the audio industry. They offer a wide range of products catering to both audiophiles and casual listeners. Their products include open back and closed back audiophile headphones, in-ear monitors, ANC headphones, and true wireless earbuds. They are known for their exceptional sound quality and durability. Whether you're a professional musician or just a music enthusiast, Sennheiser has something for everyone.

Description
Sennheiser HD 300 PROtect Closed-Back Monitoring Headphones
Hear with Precision. Protect Your Ears. Perform at Your Best.
Experience the perfect blend of high-resolution sound, professional-grade comfort, and intelligent hearing protection with the Sennheiser HD 300 PROtect. Designed for sound engineers, musicians, and production professionals, these closed-back monitoring headphones deliver pristine, distortion-free audio while actively protecting your ears from harmful peak sound levels.
At the core of the HD 300 PROtect is Sennheiser’s patented ActiveGard™ technology, which smartly manages unexpected audio peaks above 110 dB. Instead of cutting the sound entirely, it reduces dangerous levels to a safe, clear signal—ensuring complete control without compromising fidelity.
Tailored for accuracy, the HD 300 PROtect features a linear frequency response and high-sensitivity transducers for ultra-precise sound reproduction. Whether you're in the studio or on stage, its noise-isolating closed-back design and refined acoustic tuning inspired by the HD 250 linear offer detailed, immersive audio in any environment.
Comfort is just as important as clarity. With soft, viscoelastic earpads, optimal pressure distribution, and long-lasting materials, these headphones are built for extended use without fatigue. Plus, they feature exchangeable cables with Sennheiser’s trusted system connector—making them a durable, professional companion for daily work.
🔑 Key Features
-
ActiveGard™ Technology: Reduces audio peaks safely without muting sound
-
High-Resolution Sound: Accurate, linear audio for critical monitoring
-
Exceptional Comfort: Soft padding and pressure-balanced fit for long sessions
-
Noise Isolation: Closed-back design effectively blocks ambient noise
-
Built to Last: Durable materials and modular components for longevity
🛡️ Why Choose the HD 300 PROtect?
-
Ideal for professional recording, live monitoring & broadcasting
-
Protects your hearing while preserving clarity
-
Trusted by industry pros for performance and reliability
General:
Wearing Style: Dual Ear with Headband
Foldable: Yes
Earpiece Swivel: No
Earpiece Design: Over-Ear (Circumaural)
Open/Closed-Back: Closed-Back
Sound Field: Stereo
Color: Black / Silver
Audio Performance:
Driver Type: Dynamic
Impedance: 64 Ohms
Maximum SPL: 123 dB at 1 kHz
Maximum Power Handling: 500 mW
Volume Limiting: Yes, limited to 110 dB max
Active Noise Cancellation: No
Controls & Microphone:
Built-In Controls: No
Built-In Microphone: No
Connectivity:
Audio Connector: 1x 1/8" (3.5 mm) TRS
Included Adapter: 1/4" (6.3 mm) TRS
Cable Design: Detachable / Straight
Cable Length: 4.92 ft (1.5 m)
Physical Specs:
Weight: 10.5 oz (297 g, without cable)
Packaging Info:
Package Weight: 1.16 lb
Box Dimensions (L x W x H): 9.7 x 7.6 x 3.5 in
In The Box
Sennheiser HD 300 PROtect Closed-Back Active Gard Studio Monitor Headphones
4.9' Headphone Cable
1/4" Adapter
Warranty Period: 2 Year from the date of Invoice
Covered: Manufacturing Defects Only
Website: https://en-in.sennheiser.com/service-support-contact-service-centers-in-india
Contact No: 1800 22 36 32
Email Id: in-info@sennheiser.com
Sennheiser is a well-known brand in the audio industry. They offer a wide range of products catering to both audiophiles and casual listeners. Their products include open back and closed back audiophile headphones, in-ear monitors, ANC headphones, and true wireless earbuds. They are known for their exceptional sound quality and durability. Whether you're a professional musician or just a music enthusiast, Sennheiser has something for everyone.
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from 5126 reviewsQuality

The amount you pay for this DAC is absolutely worth it. I'm using it with my PC, and I also have a Fiio KA13. It provides 32-bit 48000Hz audio output, and it's really good. I'm connecting it via a USB-C port and one extension cable (AGARO 3.5mm Aux Male to Female Extension Cable, Gold Plated). There’s no audio loss whatsoever.
The only minor issue is when you use it with a mobile device — the blue light can be a bit annoying. However, that's more of a personal preference. It also makes some noise with certain songs, but that's actually a known issue with the CS46L41 chip. There's no need to worry though; unless you've used a high-end DAC before, this will be more than enough for you.
Bass and clear vocals
😊
Excellent sound quality

After searching internet found this dac which has multiple input options and support 165*2 watts passive speakers and 350 watt passive subwoofer for future extension, tested with all input modes, bluetooth input feels a bit of low quality as it only supports sbc and aac codecs only, however if you want to use mobile via wired, alternative option is to use audiocular d08 cs-pro usb-c to 3.5 mm and 3.5 mm to rca input (cable creation brand). Optical input mode supports PCM (loss less stereo output) and Digital compress audio multichannel only) these are specific to Sony X-80J 65 inches

Thanks a lot Pritam Ji for suggesting me to use a balanced cable with my Moondrop Aria IEMs and thanks a lot for ordering Moondrop Aria filters for me. The Audio Store goes out of the way to serve Indian audiophile community.
The way my IEMs sound with a balanced cable and Shanling UA2 Plus DAC & Amp are unprecedented!
I am grateful Pritam Ji. 🙏🏻

The empathetic support that I got (as a budding audiophile) from Pritam Ji at The Audio Store is unparalleled. I am grateful Pritam Ji. 🙏🏻

Just bought it and started using it with my IFI Zen Stack - feels awesome.
This was a natural pick for me, since I wanted to have a completely balanced setup for my HiFiMan Sundara.
Nothing much to add, if you want an optimal balanced setup without spending too much, then look no further.
Thanks AudioStore for being blazing fast with your delivery. I got it withing 48 hours of placing my order! Kudos.

For my HiFiMan Sundara, this is a nice quality 4.4 mm balanced cable. I am buying this for the second time, since the first one got destroyed by my kids.
If you are looking for a good quality 4.4 mm balanced cable, look no further.
Audio

This product is reached my expectation good purchase good audio signal transmission no noise at all.....thank you the audio store👍
Yes

I have used lots of TWS even high end of Samsung and Oppo worth 10K. But IEM sound signature is great! This is my second IEM. I had KZ-ZEX. It has dual driver with electrostatic. Compare with that MoonDrop Chu 2 is better clear and smooth sound signature even with single driver. I am using with Audiocular DAC cost 750. Just go with MoonDrop Chu 2 if you are music lover. Thanks.
Great packaging and quick delivery