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Sennheiser PX 685i (Black)

Lightweight Adidas Sports Series Earphones/Earbuds with Integrated iPhone/iPod Remote & Microphone

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List price $79.95

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Arrives by Monday, Mar. 16 to zip 98144

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In Stock. Only 2 Left!

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Bundled Savings with this Product


Save 50% on the MM 30i Earbuds with Select Sennheiser Headph

Save 50% on the MM 30i Sennheiser earbuds when you purchase select Sennheiser headphones. Offer cannot be combined with any other coupons, discounts or promotions.




Sennheiser PX 685i (Black)



50% OFF

Sennheiser MM 30i Black (MM30i) Earbuds with 3-Button Mic for Apple iPhone


Special Price $10.97 ($21.95 if purchased separately)

Sennheiser MM 30i Black (MM30i) Earbuds with 3-Button Mic for Apple iPhone

• In-Ear Noise Isolating Headphones/Headset
• Integrated Smart Remote And Microphone For Enhanced Usability And Convenience
• High Output Drivers For Impressive Low End Response
• Various Ear Adapter Sets For Maximum Comfort

(Offer 1 of 1)

Combined Total Price


You Save $10.98

Do You Want to Make Your Listening Experience Better?

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Headphone Amplifiers [+]

Audiophile, Premium, Best In-Class, Sennheiser

Sennheiser is a name that is synonymous with audiophile products. They have been viewed as a premium, top-tier (dare we say "The" top-tier?) brand since the beginning of time. Laboratorium Wennebostel's time that is. In 1945, Prof. Dr. Fritz Sennheiser founded Laboratorium Wennebostel's, or "Lab W" in a pleasant half-timbered house. Fritz Sennheiser was born with a gift. When he was 11 years old, he saw an early radio that inspired him to build a crystal radio. Again, he was 11 years old. There was no turning back from that day. The following year after founding "Lab W", Sennheiser produced his microphone. From that point on, it was one success story after the other. Sennheiser's technology continued to improve, and "The Bar" continued to rise. In the mid 60's, Sennheiser released the HD 414, the world's first "Open Headphones". That very day changed the future of headphones forever. That very same headphone, the HD 414, not only helped establish Sennheiser as a leading headphone manufacturer, but it sold over 10 million units. It is the best selling headphone of all time, and Sennheiser had just gotten started.

An Oldie, But a Goodie!

When you look around, technology has managed to work its way into just about every single persons life. Not that it is a bad thing, its one of the outcomes of people striving to achieve more. Sennheiser is a company founded off of that very concept. Time and time again, Sennheiser went out and achieved more. Changed the way people see many things, new or even very common. The PX 685i is not a brand new idea, just a brand new direction on a very popular concept. The idea of a lightweight "Headband" (not neckband, very common mistake) Headphone was a very popular thing when portable audio became possible. Mainly paired with their corresponding AM/FM radio, CD player, etc., they were built for people who want to be able to listen to their music, while minimizing their potential restrictions. A walk, run, or jog isn't quite as enjoyable when your ear is sweating more than the rest of your body. Lets face it, it just flat out feels awkward. Sennheiser took this concept, and went all in. Better than ever, this oldie is the newest goodie.

Serious Sports & Audio Fans Only!

If you have ever been a fan of sports, outdoor activities, going to the gym, or even Physical Education (P.E.) class, then chances are you are familiar with a little brand called Adidas. Chances are, 2 of the 3 people closest to you during these activities are currently sporting the brand. The main reason is Adidas is sort of the unofficial sporting goods leader. Since the beginning of time, Adidas (from Adolf or "ADI" Dassler or "DAS" the founder, ADI-DAS) has been supporting athletes and providing them with better, more effective sporting equipment. It should come as no surprise to see Sennheiser partner with a sporting goods world leader when they went after one of the most popular ideas ever. Sennheiser and Adidas were going to partner to manufacture the best all around headphones and best earbuds for athletes, sports usage, and gym goers. The result of this brilliant partnership, perfection. Headphones and Earbuds that can endure the torment that athletes will put them through. Headphones & Earbuds that can be washed, and rinsed clean after hours of dripping sweat, through incredibly humid weather. Durable & flexible building materials made to adjust and perform in the toughest environments. Adidas was not the only providing benefits here, because anyone who has ever owned a pair of Sennheiser headphones knows exactly how serious they take their sound. As always, premium audiophile grade acoustics we used in every single model. The PX 685i Headphones feature open acoustics within their in-ear design. This allows users to hear outside noise without the need to remove their headphones. Runners can rest assured, the open acoustics provide outside sound waves with a nice entrance to help make listeners aware of any sounds that may require your attention, or reaction. The icing on the cake is the built-in remote control and microphone. Nothing is worse than stopping your exercise to pull your phone out of your pocket to answer a phone call, or change the track to something a little more motivating. Now, clearing the call (or answering if you really want to) on your iPhone, or changing the track on your iPod is as simple as pressing a button on your remote. Don't ever forget, good things come to those who wait. But wait no longer, because dreams have come true.

What's In The Box?
  • 1x Sennheiser PX 685i (Black)
  • 1x Ear adapters (S/M/L)
  • 1x Air cushion adapters
  • 1x Storage pouch
  • 1x Cable clip

General Features:

  • In-Ear Headband Adidas Active Sport Earphones/Earbuds
  • Integrated smart remote and microphone for enhanced usability and convenience of iPod/iPhone/Smartphone Phone Calls, and music listening
  • Let Siri do all the work with new "Siri Enabled" in-line microphone
  • Ergonomic headband for secure and comfort fit during workouts
  • High output drivers for impressive low end response
  • Para-aramid reinforced cable for superior strength and reliability
  • Acoustically tuned to deliver crystal clear sound at all volume levels
  • Ideal for use with all MP3, iPad, iPod, iPhone
  • Tangle-free cable for convenient listening
  • Designed with a snug fit for active people
  • Sweat and water resistant ensures reliable playback during the toughest, hottest, sweatiest environments
  • Gold-plated, corrosion-resistant stereo jack
  • Various ear adapter sets for maximum comfort
  • Main Color: Black
  • Additional Color Tone: Silver & Blue
  • Manufacturer Part Number: 504981
  • Also Found As: Sennheiser PX-685i Black, PX685i Black, PX-685i Silver, PX685i Silver
  • Also Available In: White
  • Authorized Internet Dealer
  • 2 Year Manufacturer's Warranty

Product Specifications:

  • Headphone Design: In-Ear (Inner-Ear Canal)
  • Headphone Fit: Headband
  • Driver Design: Dynamic Speaker
  • Frequency Response: 18-20,000 Hz
  • Sound Pressure Level (SPL): 120 dB
  • Total Harmonic Distortion (THD): <0.5%
  • Nominal Impedance: 16 Ohms
  • Pick-up pattern: Omni-directional
  • Connection: Angled 3.5mm (1/8 Mini Jack)
  • In-Line Remote & Microphone: Compatible with Apple iPod, iPhone, & iPad
  • Cable Length: 3.96 Feet (1.2 Meters, Symmetrical)
  • Special Feature: Sweat-Proof, Perspiration-Proof, & Water Resistant (Can be Rinsed Clean)

Headphone Design

Headphone Type

Headphone type refers to the construction of the headphones.

Around the Ear means that the headphones wrap around the ear to provide a secure fit. This is most often seen in active and sports headphones.

Around the Neck means that the headphones wrap around the neck. This is also seen in active and sports headphones.

Earbuds means that the right and left sides of the headphones are separated and will fit securely into the ear. These are small, compact, and user friendly.

Over the Head headphones mean that the right and left speakers are connected with a support that goes over the head and rests on top. This is the typical headphone type.

Earpiece Design

This is the design of the earpieces on the headphones. Some headphones go inside the ear, while others rest on the outside of the ear. This helps you know exactly what type of headphones you will be receiving.

In-Ear: The ear buds go into the ear. Most often, the right and left ear buds are two separate pieces.

Enclosed-Ear: Usually are found on the larger headphones. They rest on top of the ear and have padding for comfort, as well as enclosing the ear to the speaker. This type of headphone helps to filter out surrounding noise.

On-Ear: This type of headphone involves the speaker sitting gently on the ear without going in the ear or sealing it off.

Specifically For
Some headphones can use an IR Transmitter in your vehicle, while some can be plugged into your media device and be used on the go or at home.

This is the lifestyle that the headphones are designed for. Each style has unique features that make it perfect for particular people.

Designed for those that are active. These headphones are made to stay in the ear during workouts. Whether you frequent the gym a lot or go running outside in the fresh air, these active style headphones will be your best friend.

For those that need the best in music quality. These audiophile headphones are engineered to produce high fidelity and accurate audio replication.

Disc Jockeys (DJs) require a special type of headphone that can meet their professional needs. These headphones are durable, loud, and will often allow for one ear listening.

Fashion Enthusiast:
For those that want to make a fashion statement with their headphones. Not only are these headphones designed with great sound quality in mind, but also great looks!

This lifestyle speaks for itself! If you love video games and want a pair of headphones that will deliver explosive sound and allow you to communicate with others, this is where you need to shop!

Music Lover:
These headphones are made to sound great. They are designed to produce rich, brilliant sounds that will play your music in a manner that the artists would appreciate. These headphones are for those that love music.

Musical Production / Recording Artists:
You're a music creator. Whether you're producing and mixing it down or in the studio recording yourself, you need a pair of headphones that will reproduce the music perfectly without any coloration. Look here for reference quality studio monitoring headphones.

Headphones need to be affordable and durable to keep up with the student lifestyle. A variety of styles can be considered a pair of student headphones.

Those that often find themselves on planes or on the road a lot. These headphones are compact, lightweight, and have a portable design. Some of the headphones in this lifestyle will feature noise cancellation technology that will help shut out outside noise.


General Features

Noise Reduction technology removes unwanted noise from a signal. Background or ambient noise can be removed to produce clearer speech and enhanced hearing. Typically these Active Noise Canceling (ANC) headphones are powered and use batteries to activate the noise canceling technology. Also referred to as Noise Reduction or Noise Cancellation.
Headphone Connection
This is how the headphones connect to the audio source.

Corded means that the headphones use a cord to transfer the audio signal.

Wireless means that the audio signal is transmitted wirelessly to the headphones.

1/4" Stereo Jack Adapter
Some headphones will come with a 1/4" stereo jack adapter to connect the usual 3.5mm jack to a 1/4" stereo plug.

1/4" Stereo jack is a larger audio jack that select electronics have.

Volume Adjustment
Volume Adjustment means that the headphone (independent of the source) can adjust the playback volume. Many headphones and ear buds have in-line volume control, which allows adjusting the audible volume from a switch on the headphones cord. Other headphones have a volume knob on the headphone can.
Built-In Microphone
This means that the headphones or earbuds have a built-in microphone. This can be a microphone on the cord, built into the headphone, or even a boom microphone. These mics can be used for music devices like iPods, for Smartphones to make and receive calls, or for gaming purposes.
Driver Type
The physical design of the driver in the headphones.
The opposition to electric current, a higher impedance means a higher electrical resistance. This is measured in ohms.
16 ohms

Specials with this Item

Promotions we have offer More Ways to Shop for items that are on clearance, last chance, special offer and sales, Made in America, and more!

Warranty and Return Policy

Parts Warranty Duration
2 years
Labor Warranty Duration
2 years
Warranty Provider

Summary of Customer Ratings & Reviews

Rating Distribution

5 Star
4 Star
3 Star
2 Star
1 Star

Average Attribution Rating


South Florida

Great for gym use

March 31, 2014

I own the Sennheiser CX 685 ear buds and Sony MDR-EX210 ear buds. The Sennheiser sound better than the Sony. But both of these do not stay in my ear at the gym no matter which size buds I use. I purchased this PX 685 so I don't have to worry about that any longer. They sound great for the price, with a good equalizer app they sound even better. They do have lesser bass than the CX 685, but only because they aren't stuffed inside your ear canal like the ear buds. The only con I can think of is the pouch that comes with it. They are a tight fit and the velcro will rip the foam pads off. So either avoid using the pouch or go on Ebay and purchase spare foam rubber pads for a few bucks.

10 of 16 found this helpful

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Madison, WI

Good Running Headphones

August 22, 2014

I recommend these headphones for running and other high-impact forms of exercise. They sound great, stay secure in your ears, and are very durable--probably the best running headphones I've found, and I've tried a lot of different brands and models.

7 of 13 found this helpful

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Duncans Mills, CA

Awesome Product !!

March 17, 2014

I've recently purchased this headset and I have to say, it is extremely awesome !! I can turn the sound up while in a quiet library and it cannot be heard AT ALL. I did a test just to see how loud I could turn it up without it being heard because I've had headphones in the past that you can hear music even at a quiet level while they are in your ears. Not these headphones. Even when they are out of your ears at a louder than normal volume, music still cannot be heard. They are the best I've ever owned !!

8 of 15 found this helpful

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Was what I was hoping it would be

February 3, 2014

Ear buds don't fit in my ears so running with music has been impossible. This product works great for me. It stays on my head when running and the volume adjustment, stop music, skip song option is great and easy to use while running.

7 of 13 found this helpful

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Why did you choose this?
Sonic Electronix Store
this type of headphones fits best and comfort
EHUD S on Sep 6, 2014

Product Summary


Model Number

PX 685i





Internal SKU


Internal Product ID


Sonic Electronix Wiring Guide

Wiring Diagram Legend

Warning: The image depicted shows the resistance change when wiring multiple subwoofer terminals. Please refer to your subwoofer's owner's manual for the proper wiring of its terminals. Sonic Electronix, Inc. is not responsible for damage caused to your audio system or vehicle due to improper installation. Please call tech support at 1-877-289-7664 if you require additional assistance.

Product Name: Sennheiser PX 685i (Black)