Home Headphones Sennheiser Hd 660S2 Vs. Jbl Live 660Nc

A Review By Comparison of the Sennheiser Hd 660S2 Vs. Jbl Live 660Nc

Last updated on Mar 14, 2023   8 min read
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JBL Live 660NC

JBL Live 660NC

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Reasons why you might like the JBL Live 660NC

Overall Score 5.3 Represents average audio ecosystem compatibility score.

  • Weight of 265 g
  • Has Active Noise Cancellation (Anc)
  • Battery Life of 50 hours
  • Can Be Used Wirelessly
  • Has Ambient Sound Mode
Sennheiser HD 660S2

Sennheiser HD 660S2

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Reasons why you might like the Sennheiser HD 660S2

Overall Score 2.6 Represents average audio ecosystem compatibility score.

  • Weight of 260 g

A summary of the review by comparison

Category Features Sennheiser HD 660S2 JBL Live 660NC
DESIGN weight 260g 265g
has a detachable cable
can be folded
has a tangle free cable
has an open-back design
cable length 1.8meters 1.2meters
has an over-the-ear foam
has stereo speakers
SOUND QUALITY has active noise cancellation (anc)
has passive noise reduction
lowest frequency 8Hz 16Hz
highest frequency 41500Hz 20000Hz
sound pressure level 104dB/mW 97dB/mW
driver unit size 38mm 40mm
impedance 300Ohms 32Ohms
POWER battery life 50hours
charge time 2hours
has a battery level indicator
has a rechargeable battery
CONNECTIVITY can be used wirelessly
bluetooth version v5
has usb type-c
has aac
maximum bluetooth range 10meters
has a 3.5mm male connector
MICROPHONE has a noise-canceling microphone
EXTRAS has ambient sound mode
has a mute function
multipoint count 2only
control panel placed on a device
can be used as a headset
warranty period 1years
travel bag is included
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A breakdown of the review per specifications



JBL Live 660NC 265g
Sennheiser HD 660S2 260g

Sennheiser HD 660S2 have a weight of 260g, these weigh below 320g, which we consider as the highest average a headphone should weigh for comfort during long use. We take in account a lower weight better because lighter devices are more comfortable to move with.

JBL Live 660NC, at 265g weigh more than the Sennheiser HD 660S2 with a difference 5g

Has A Detachable Cable

JBL Live 660NC
Sennheiser HD 660S2

Detachable cables are cables that have connectors on both ends. One end goes into your headphone cups, while the other end is inserted into an audio source. Some new headphones, and not just the expensive ones, are coming with detachable cables, Sennheiser HD 660S2 are one of those.

With a detachable cable, JBL Live 660NC too can use alternative cables and if the cable is pulled, it will pop out instead of breaking.

Can Be Folded

JBL Live 660NC
Sennheiser HD 660S2

JBL Live 660NC are foldable, which makes them more portable. Foldable headphones are easier to transport and take up less storage space.

Has A Tangle Free Cable

JBL Live 660NC
Sennheiser HD 660S2

Twisted headphone cables can be a great source of annoyance and inconvenience, Sennheiser HD 660S2's cable is designed to minimize tangling. Constant twisting of the cables can also lead to microfractures in the copper wires, affecting sound quality, or rendering your headphones defective.

JBL Live 660NC too have a cable designed to help prevent tangles.

Has An Open-Back Design

JBL Live 660NC
Sennheiser HD 660S2

Headphones that are designed to allow air to pass through their ear cups from the rear of the speaker driver unit are known as open-back. This design provides a very natural and accurate sound, Sennheiser HD 660S2 have this kind of design which means that resonances and low-frequency that tend to build up caused by the rear enclosure are no longer a concern.

Cable Length

JBL Live 660NC 1.2meters
Sennheiser HD 660S2 1.8meters

A long cable ensures more freedom of movement, but remember that every cable based on the conducting material used has a certain amount of parasitic resistance, inductance, and capacitance. How much depends on the length and construction. Sennheiser HD 660S2 comes with a 1.8meters cable.

JBL Live 660NC comes with a 1.2meters cable. Almost any cable should be fine in sound quality If you're looking at lengths up to 2 - 3 meters.

Has An Over-The-Ear Foam

JBL Live 660NC
Sennheiser HD 660S2

Over-ear headphones have larger earpads that fit around your entire ear Sennheiser HD 660S2 have a comfortable full-size form with earcups that fully enclose your ears. This design is loved for its increased sound isolation and the fact that it won't leak sound to your neighbors.

JBL Live 660NC with this design offer potential for maximum bass and loudness levels.

Has Stereo Speakers

JBL Live 660NC
Sennheiser HD 660S2

Sennheiser HD 660S2 have stereo speakers, what this means is that Sennheiser HD 660S2's speakers deliver sound from independent channels on both left and right sides, creating a richer sound and a better listening experience.

The JBL Live 660NC also have stereo speakers

JBL Live 660NC
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Sound Quality

Has Active Noise Cancellation (Anc)

JBL Live 660NC
Sennheiser HD 660S2

Active noise cancellation uses more advanced technology to reduce unwanted ambient sounds. How it works, it detects and analyzes the sound pattern of incoming noise and then generates a mirror signal to cancel it out. In simple terms, it's like taking +1 outside (noise from your surrounding) and adding -1 inside (counter sound within the device) to make 0 hence "diluting" the noise.

JBL Live 660NC allow you to listen at lower volume levels, causing less ear fatigue as you don't have to crank up the volume to overcome background noise.

Has Passive Noise Reduction

JBL Live 660NC
Sennheiser HD 660S2

Passive Noise Cancellation uses well-designed ear cups to seal out environment noise. This is used for both in-ear earphones and over-ear headphones where the headphone itself will keep surrounding noise out. The Sennheiser HD 660S2 sits tightly in place, creating an acoustic seal that reduces background noise and prevents your music from leaking out.

Both of these devices have passive noise reduction which means that also the JBL Live 660NC isolates you from ambient noise instead of actively using technology to cancel it out.

Lowest Frequency

JBL Live 660NC 16Hz
Sennheiser HD 660S2 8Hz

Low-frequency response measures if and how well an audio device reproduces low audible frequencies and if it makes any changes to the signal on the way through. Sennheiser HD 660S2's lowest frequency is at 8Hz, the lower the low-frequency response, the stronger and juicier the bass.

JBL Live 660NC's lowest frequency is at 16Hz, this means that JBL Live 660NC got a juicier bass than the Sennheiser HD 660S2

Highest Frequency

JBL Live 660NC 20000Hz
Sennheiser HD 660S2 41500Hz

High frequency response measures if and how well a particular audio component reproduces high audible frequencies and if it changes to the signal on the way through. Sennheiser HD 660S2's highest frequency is at 41500Hz, the higher the high-frequency response, the clearer and crispier the treble.

JBL Live 660NC's highest frequency is at 20000Hz, this implies that Sennheiser HD 660S2 got a clearer and crispier treble than the JBL Live 660NC

Sound Pressure Level

JBL Live 660NC 97dB/mW
Sennheiser HD 660S2 104dB/mW

Sound pressure is the average variation in atmospheric pressure caused by the sound, the sound level .i.e how loud something is can be perceived differently by different people so we need to have the means to get an objective measurement of sound level expressed in numerical terms.

The sound pressure level, SPL, is the pressure level of a sound, measured in decibels, dB, Sennheiser HD 660S2's measurement is 104dB/mW. Devices with a higher sound pressure level are generally louder when supplied with any given audio source.

JBL Live 660NC's sound pressure level measurement is 97dB/mW.

Driver Unit Size

JBL Live 660NC 40mm
Sennheiser HD 660S2 38mm

The driver unit is the component that produces sound in the device, its size dictates the loudness of the headphone. Sennheiser HD 660S2 driver unit is 38mm in diameter, bigger drivers are more powerful and can produce better bass.

JBL Live 660NC driver unit is 40mm in diameter, making them have a larger driver unit than that of Sennheiser HD 660S2 by 2mm , as many tend to believe that driver units of a bigger size automatically produce better sound quality.

However, large drivers usually have difficulty reproducing high frequencies so it's true that, larger drivers can generate louder sound, but this does not mean that they deliver better sound.


JBL Live 660NC 32Ohms
Sennheiser HD 660S2 300Ohms

Defined as the device's resistance to the electromagnetic current, when electricity flows through a conductor, it experiences electrical resistance that counters the flow of current. The resistance of a wire is measured in ohms. Sennheiser HD 660S2's impedance is 300Ohms, the lower the impedance, the easier it is to get higher volume and requires less power.

JBL Live 660NC's impedance is 32Ohms. The impedance of earbuds is the electrical resistance of the driver unit present on the inside.


Battery Life

JBL Live 660NC 50hours
Sennheiser HD 660S2

If your headphones play wirelessly, cancel ambient noise, or enhance your listening experience with active features, their battery life will reduce over time. The device's battery life is given by the manufacturer, with longer battery life, you get to use it for longer and have to charge the device less often. JBL Live 660NC's battery life is 50 hours

Charge Time

JBL Live 660NC 2hours
Sennheiser HD 660S2

It takes 2 hours to fully charge the JBL Live 660NC's battery. It is recommended to fully charge the battery before using the headphones for the first time or when they have been unused for extended periods.

Has A Battery Level Indicator

JBL Live 660NC
Sennheiser HD 660S2

JBL Live 660NC have a battery level indicator, an indicator shows you when the device has a low battery. The battery indicator lights indicate the charging status of your headphones.

Has A Rechargeable Battery

JBL Live 660NC
Sennheiser HD 660S2

A rechargeable battery is a type of electrical battery that can be charged, discharged into a load, and recharged many times, as opposed to a disposable or primary battery, which is supplied fully charged and discarded after use. JBL Live 660NC's battery can be recharged and used over again.

JBL Live 660NC
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Can Be Used Wirelessly

JBL Live 660NC
Sennheiser HD 660S2

JBL Live 660NC can be used wirelessly, wireless devices allow users more freedom of movement.

Bluetooth Version

JBL Live 660NC v5
Sennheiser HD 660S2

Bluetooth is a wireless technology standard that allows data transfers between devices placed in close proximity, using short-wavelength, ultra-high frequency radio waves. JBL Live 660NC has a v5

Has Usb Type-C

JBL Live 660NC
Sennheiser HD 660S2

JBL Live 660NC support USB TYPE-C, an industry-standard connector for transmitting both data and power on a single cable. The USB-C plug is now part and parcel of most current laptops, phones, and tablets, it features reversible plug orientation and cable direction.

Has Aac

JBL Live 660NC
Sennheiser HD 660S2

JBL Live 660NC support AAC, a codec that is used for Bluetooth audio. It supports 24-bit audio at 250kbps. Because it uses psychoacoustic modeling, it can provide better results than other codecs at a similar bit rate.

Maximum Bluetooth Range

JBL Live 660NC 10meters
Sennheiser HD 660S2

Bluetooth is a short-range wireless technology standard that is used for exchanging data between fixed and mobile devices over short distances. The JBL Live 660NC can connect at a 10meters distance via Bluetooth or infrared to another device.

Has A 3.5Mm Male Connector

JBL Live 660NC
Sennheiser HD 660S2

Being an industry standard audio plug, a standard 3.5mm male connector is suitable for use with all MP3 players and computer sound cards. This means that it is commonly used in stereo headphones to your phone or connecting your phone to an external amplifier, sound bars, your car radio, etc. Sennheiser HD 660S2 has this connector giving it a wider range of connectivity with most of the sound devices out there. All plugs have at least a tip and sleeve with the number of rings that stand as a differentiating factor.


Has A Noise-Canceling Microphone

JBL Live 660NC
Sennheiser HD 660S2

JBL Live 660NC use a noise-canceling type of microphone, these microphones are designed to filter out background noise from the desired sound. Especially useful in noisy environments.

JBL Live 660NC
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Has Ambient Sound Mode

JBL Live 660NC
Sennheiser HD 660S2

JBL Live 660NC support ambient sound mode, which uses microphones to pass through ambient noises so that they can still be heard. It’s useful when you want to listen to music but also be aware of what’s happening around you, for example when you’re having a jog but would still want to be able to hear traffic.

Has A Mute Function

JBL Live 660NC
Sennheiser HD 660S2

JBL Live 660NC have a mute function, they have an option to mute/unmute a conversation directly from the device. The mute function means that you unilaterally turn off the microphone, but you can still hear the other party's voice.

Multipoint Count

JBL Live 660NC 2only
Sennheiser HD 660S2

JBL Live 660NC support multipoint, which allows you to link to more Bluetooth devices and switch between them. For example, you can easily switch calls from one device to another without having to manually disconnect and reconnect.

Control Panel Placed On A Device

JBL Live 660NC
Sennheiser HD 660S2

There is a control panel on the JBL Live 660NC body, so you can easily access the volume control or remote without having to interact with a cable or another device it's connected to.

Can Be Used As A Headset

JBL Live 660NC
Sennheiser HD 660S2

JBL Live 660NC can be used as a headset. A headset is one headphone or pair with a built-in microphone. Headsets can be used for apps that require communication i.e. Zoom, Google Meet, Skype, games with voice chat, mobile phones, etc.

Warranty Period

JBL Live 660NC 1years
Sennheiser HD 660S2

The period of time that warrant free repair and adjustment services in case of a malfunction occurring under normal use that has followed instruction manuals. When covered under the manufacturer’s warranty it is possible to get a replacement in the case of a malfunction. JBL Live 660NC have a warranty period of 1 years

Travel Bag Is Included

JBL Live 660NC
Sennheiser HD 660S2

Carrying headphones without a case, or putting them in bags without a casing can easily put them at risk of getting damaged. The Sennheiser HD 660S2 come with their own special case or pouch, which is useful for safe transportation.

JBL Live 660NC too have a travel bag or case included.

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