A breakdown of the review per specifications

Ingress Protection (Ip) Rating

Sennheiser CX 500BT IPX4

Sennheiser Momentum True Wireless 3 IPX4

IP ratings is the rank of protection given by an enclosure, against solids and water. The letters 'IP' are followed by two values The first value refers to protection against solids say dust, while the second refers to resistance against liquids (sweat).

Scoring IPX4, the Sennheiser CX 500BT's rating is read as, the first value of X denotes that no data available to specify a protection rating, and of liquids that they can withstand low pressure spray similar to that of a shower head when tilted at 180° for 10 minutes.

Compared to the Sennheiser CX 500BT, Sennheiser Momentum True Wireless 3 have a rating of IPX4 meaning that we are not yet certain of their rating with solids (dust) and that of liquids is that, they both have the same rating against liquids

Weight

Sennheiser CX 500BT 12g

Sennheiser Momentum True Wireless 3 10.6g

The Sennheiser CX 500BT have a weight of 12g . We prefer a lower weight better for the reason that lighter devices are easier to transport.

Sennheiser Momentum True Wireless 3, at 10.6g are lighter than the Sennheiser CX 500BT with a difference -1.4g

Has No Wires Or Cables

Sennheiser CX 500BT ✓

Sennheiser Momentum True Wireless 3 ✓

For a device to be true wireless it must have no wires linking any part of the device together, Sennheiser CX 500BT are true wireless for this case since they don't have cables. This is a major difference as some wireless earbuds have wires linking the 2 earbuds .

Sennheiser Momentum True Wireless 3 also is true wireless since it has no cables connecting the two earbuds .

Sweat Resistance

Sennheiser CX 500BT ✓

Sennheiser Momentum True Wireless 3 ✓

Sennheiser CX 500BT have sweat resistance

Sennheiser Momentum True Wireless 3's resistance to sweat makes both devices fit for use while doing sports such as long-distance running, marathons, training in workout bodysuits, etc

Has Stereo Speakers

Sennheiser CX 500BT ✓

Sennheiser Momentum True Wireless 3 ✓

Sennheiser CX 500BT have stereo speakers, what this means is that Sennheiser CX 500BT's speakers deliver sound from independent channels on both left and right sides, this creates a richer sound and a better listening experience.

The Sennheiser Momentum True Wireless 3 also have stereo speakers

Sennheiser CX 500BT
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Has Active Noise Cancellation (Noise Control)

Sennheiser CX 500BT ✓

Sennheiser Momentum True Wireless 3 ✓

ANC utilises more advanced technology to actively cancel noise. How it works, it studies the sound pattern of incoming noise and after inverts the soundwaves to cancel it out. Simply put, it's like taking +1 (sound from your surrounding) then adding -1 (inverted noise) giving zero thus "diluting" the noise.

The Sennheiser CX 500BT have ANC enabling you to listen at lower levels of volume, causing less ear fatigue as you don't need to crank up the earbuds volume to overcome background noise.

Sennheiser Momentum True Wireless 3 too have Active Noise Cancellation making both earbuds ideal for plane rides and rush hour travels. Each work with different noise cancellation settings, pick the noise cancellation type that suits your travel or that suites your chill time.

Has Passive Noise Reduction

Sennheiser CX 500BT ✓

Sennheiser Momentum True Wireless 3 ✓

Sennheiser CX 500BT stay tightly in place, this creates an acoustic covering that tones down background noise well as preventing the earbuds voice audio from leaking out .

Both Sennheiser Momentum True Wireless 3, and Sennheiser CX 500BT have passive noise reduction which implies that they reduce ambient noise without using technology to cancel it out.

Driver Unit Size

Sennheiser CX 500BT ✗

Sennheiser Momentum True Wireless 3 7mm

Sennheiser Momentum True Wireless 3 have a unit size of 7mm in diameter, the bigger the unit the more powerful, therefor producing better bass. A driver unit is basically a mini speaker that makes sound in the earbuds, its size determines the loudness of the device.

Lowest Frequency

Sennheiser CX 500BT 5Hz

Sennheiser Momentum True Wireless 3 5Hz

Sennheiser CX 500BT's lowest frequency is at 5Hz, low-frequency response inidcates how well a particular audio device generates low audible frequencies and if it makes any changes to the signal on its way through.

Sennheiser Momentum True Wireless 3's lowest frequency is at 5Hz, this implies that both devices can make sound with equal bass

Highest Frequency

Sennheiser CX 500BT 21000Hz

Sennheiser Momentum True Wireless 3 21000Hz

Sennheiser CX 500BT's highest frequency is at 21000Hz, high-frequency response indicates how well an audio device generates high human frequencies and if it makes any changes to the signal on its way through.

Sennheiser Momentum True Wireless 3's highest frequency is at 21000Hz, this means that both devices can produce equal treble

Sound Pressure Level

Sennheiser CX 500BT 94dB/mW

Sennheiser Momentum True Wireless 3 107dB/mW

SPL, is the pressure level of sound, measured in decibels, dB, Sennheiser CX 500BT's measurement is 94dB/mW. Devices with a higher sound pressure level are generally louder when supplied with any given audio source.

Sennheiser Momentum True Wireless 3's sound pressure level measurement is 107dB/mW. The sound pressure level, something is can be perceived differently by different people, so we need to have a way of getting an objective measurement of sound level expressed in numerical terms.

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Battery Life

Sennheiser CX 500BT 8hours

Sennheiser Momentum True Wireless 3 7hours

The Sennheiser CX 500BT's battery life is 8 hours, these last longer than 5 hours of listening which is considered average for a single charge. A device's battery life is given by the manufacturer, and with longer battery life, you get to use it for longer and requires fewer chargings.

Sennheiser Momentum True Wireless 3's battery life is less than that of Sennheiser CX 500BT by 1 hours . Each time you recharge your earbuds, they get a little less playing time. The effect is not noticeable at first, but over a few years, your wireless earbuds will have shorter listening time.

Battery Life Of Charging Case

Sennheiser CX 500BT 16hours

Sennheiser Momentum True Wireless 3 21hours

The battery life of the charging case is given by the manufacturer, and the Sennheiser CX 500BT's case has a charge of 16 hours. A charging case with more battery hours enables you to recharge your earbuds on the go multiple times before having to recharge the case itself.

Sennheiser Momentum True Wireless 3's charging case has a battery life of 21 hours, more than that of Sennheiser CX 500BT by 5 hours

Charge Time

Sennheiser CX 500BT ✗

Sennheiser Momentum True Wireless 3 1.5hours

It takes 1.5 hours to fully charge the Sennheiser Momentum True Wireless 3's battery. It is recommended to charge fully the battery before using the earbuds when they have been in storage for extended periods.

Has Wireless Charging

Sennheiser CX 500BT ✗

Sennheiser Momentum True Wireless 3 ✓

Sennheiser Momentum True Wireless 3, the device supports wireless charging. To charge the device, you simply place down on a compatible charging pad.

Has A Battery Level Indicator

Sennheiser CX 500BT ✓

Sennheiser Momentum True Wireless 3 ✓

Sennheiser CX 500BT have a battery level indicator, an indicator alerts you when the earbuds has a low battery. The battery indicator lights display the charging state of your device and charging case.

Sennheiser Momentum True Wireless 3 too have a battery level indicator, charging indicators allow you determine the charging state of your earbuds, whether fully charged, or the battery is running low.

Sennheiser CX 500BT
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Has Usb Type-C

Sennheiser CX 500BT ✓

Sennheiser Momentum True Wireless 3 ✓

The Sennheiser CX 500BT have USB TYPE-C, a standard connector for transmitting both data and power in a single cable.

Sennheiser Momentum True Wireless 3 too have USB TYPE-C. This USB-C plug comes along with most current electronics.

Bluetooth Version

Sennheiser CX 500BT v5.2

Sennheiser Momentum True Wireless 3 v5.2

The Sennheiser CX 500BT have Bluetooth version of 5.2, Bluetooth is a wireless technology standard that allows data transfers between devices placed in range, using short-wavelength, ultra-high frequency radio waves.

Sennheiser Momentum True Wireless 3 has a Bluetooth version of 5.2, equal to that of the Sennheiser CX 500BT . Newer versions provide faster data transfers.

Maximum Bluetooth Range

Sennheiser CX 500BT 10meters

Sennheiser Momentum True Wireless 3 10meters

Sennheiser CX 500BT have a 10meters distance to connect via Bluetooth.

Sennheiser Momentum True Wireless 3 have a maximum range of 10meters, equal to that of the Sennheiser CX 500BT

Has Aac

Sennheiser CX 500BT ✓

Sennheiser Momentum True Wireless 3 ✓

Sennheiser CX 500BT 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 the same bit rate.

Since its the highest quality codec that any Bluetooth-supporting Apple product supports, the Sennheiser CX 500BT will work fine with your iPad. If you intend on using these with Android , ensure that they also support aptX HD, LDAC, or LHDC as well.

The Sennheiser Momentum True Wireless 3 support AAC as well. Designed to be the successor of the MP3 format, AAC generally achieves higher sound quality than MP3 encoders at the same bit rate.

Has Aptx Adaptive

Sennheiser CX 500BT ✓

Sennheiser Momentum True Wireless 3 ✓

The Sennheiser CX 500BT support APTX Adaptive, an audio codec for Bluetooth devices that are developed by Qualcomm. It has a variable bit rate (between 279kbps and 420kbps).

Sennheiser Momentum True Wireless 3 support APTX Adaptive as well which implies that both can adjust the bit rate for different scenarios, such as listening to HD audio from other devices.

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Number Of Microphones

Sennheiser CX 500BT 4only

Sennheiser Momentum True Wireless 3 6only

The Sennheiser CX 500BT have 4 microphones.

The Sennheiser Momentum True Wireless 3 microphones are 6, more than that of Sennheiser CX 500BT by 2 . More microphones result in better sound quality and enable the earbuds to filter out background sounds.

Has A Noise-Canceling Microphone

Sennheiser CX 500BT ✓

Sennheiser Momentum True Wireless 3 ✓

The Sennheiser CX 500BT have a noise-canceling microphone, these microphones are designed to filter out noise from the earbuds' sound.

The Sennheiser Momentum True Wireless 3 too have a noise-canceling microphone. This is useful in noisy environments.

Highest Mic Frequency

Sennheiser CX 500BT 10000Hz

Sennheiser Momentum True Wireless 3 ✗

Sennheiser CX 500BT's highest mic frequency is 10000Hz, high frequencies are best for picking up treble. The highest mic frequency of a microphone is known as its upper limiting frequency.

Lowest Mic Frequency

Sennheiser CX 500BT 100Hz

Sennheiser Momentum True Wireless 3 ✗

The Sennheiser CX 500BT's lowest mic frequency is 100Hz, low frequencies are best for recording bass. The lowest mic frequency of a microphone is defined as its lower limiting frequency.

Sennheiser CX 500BT
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Has Ambient Sound Mode

Sennheiser CX 500BT ✓

Sennheiser Momentum True Wireless 3 ✓

The Sennheiser CX 500BT support ambient sound mode, which uses microphones to channel ambient noises to still be heard even when wearing the earbuds

The Sennheiser Momentum True Wireless 3 support ambient sound mode as well, helpful when you want to listen to music but also be aware of your surrounding, say you’re having a run but still want to hear traffic.

Has In/On-Ear Detection

Sennheiser CX 500BT ✓

Sennheiser Momentum True Wireless 3 ✓

Sennheiser CX 500BT support in/on-ear detection, the sensors in the device can detect when they are removed from your ears so that the music is paused.

The Sennheiser Momentum True Wireless 3 support in/on-ear detection, automatically pauses your music, or audiobook when you remove earbuds from your ears saving battery life.

Has Find Earbuds Feature

Sennheiser CX 500BT ✓

Sennheiser Momentum True Wireless 3 ✗

When lost in a room, or can't easily find them in your bag, the Sennheiser CX 500BT support the find earbuds feature.

Supports Fast Charging

Sennheiser CX 500BT ✓

Sennheiser Momentum True Wireless 3 ✓

Sennheiser CX 500BT support fast charging. Commonly, technologies like Qualcomm’s Quick Charge, are used to lower the time it takes to charge a device.

The Sennheiser Momentum True Wireless 3 support fast charging. It's very similar to regular charging, just that the battery fills up much faster. Say, with Quick Charge 3.0, the battery can be charged to 50% in thirty minutes.

Has A Mute Function

Sennheiser CX 500BT ✓

Sennheiser Momentum True Wireless 3 ✓

Sennheiser CX 500BT have a mute function, they have the feature to mute/unmute a conversation directly from the device.

The Sennheiser Momentum True Wireless 3 too have the mute function. The mute function means that you can turn off the earbuds' microphone, but still hear the other party's voice.

Control Panel Placed On A Device

Sennheiser CX 500BT ✓

Sennheiser Momentum True Wireless 3 ✓

With the Sennheiser CX 500BT, so you can access the volume control, pause, play, mute, etc whichever functions are supported on the earbuds.

Sennheiser Momentum True Wireless 3 too have a control panel on them.

Warranty Period

Sennheiser CX 500BT 2Years

Sennheiser Momentum True Wireless 3 ✗

Sennheiser CX 500BT have a warranty period of 2 Years, the period of time that warrant free repair and adjustment services in case of a malfunction occurring under normal use following instruction manuals.

Has Voice Prompts

Sennheiser CX 500BT ✓

Sennheiser Momentum True Wireless 3 ✓

Sennheiser CX 500BT support voice prompts. Automatically receive information via audio messages, like if there is a problem with the connection.

The Sennheiser Momentum True Wireless 3 also have voice prompts meaning the earbuds notifies you when the battery is low, and you need to recharge the device.

Travel Bag Is Included

Sennheiser CX 500BT ✓

Sennheiser Momentum True Wireless 3 ✓

The Sennheiser CX 500BT come with a special case. Carrying earbuds openly, or putting them inside your bag without a casing may easily put them at risk of getting damaged.

Sennheiser Momentum True Wireless 3 also have a travel bag included, which offers safe transportation.

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Category	Features	Sennheiser CX 500BT	Sennheiser Momentum True Wireless 3
DESIGN	ingress protection (ip) rating	IPX4	IPX4
	weight	12g	10.6g
	has no wires or cables	✓	✓
	sweat resistance	✓	✓
	has stereo speakers	✓	✓
SOUND QUALITY	has active noise cancellation (noise control)	✓	✓
	has passive noise reduction	✓	✓
	driver unit size	✗	7mm
	lowest frequency	5Hz	5Hz
	highest frequency	21000Hz	21000Hz
	sound pressure level	94dB/mW	107dB/mW
POWER	battery life	8hours	7hours
	battery life of charging case	16hours	21hours
	charge time	✗	1.5hours
	has wireless charging	✗	✓
	has a battery level indicator	✓	✓
CONNECTIVITY	has usb type-c	✓	✓
	bluetooth version	v5.2	v5.2
	maximum bluetooth range	10meters	10meters
	has aac	✓	✓
	has aptx adaptive	✓	✓
MICROPHONE	number of microphones	4only	6only
	has a noise-canceling microphone	✓	✓
	highest mic frequency	10000Hz	✗
	lowest mic frequency	100Hz	✗
EXTRAS	has ambient sound mode	✓	✓
	has in/on-ear detection	✓	✓
	has find earbuds feature	✓	✗
	supports fast charging	✓	✓
	has a mute function	✓	✓
	control panel placed on a device	✓	✓
	warranty period	2Years	✗
	has voice prompts	✓	✓
	travel bag is included	✓	✓
		See price on Amazon	See price on Amazon

A Review By Comparison of the Sennheiser Cx 500Bt Vs. Sennheiser Momentum True Wireless 3

Reasons why you might like the Sennheiser CX 500BT

Reasons why you might like the Sennheiser Momentum True Wireless 3

A summary of the review by feature comparison

A breakdown of the review per specifications

Design

Ingress Protection (Ip) Rating

Weight

Has No Wires Or Cables

Sweat Resistance

Has Stereo Speakers

Sound Quality

Has Active Noise Cancellation (Noise Control)

Has Passive Noise Reduction

Driver Unit Size

Lowest Frequency

Highest Frequency

Sound Pressure Level

Power

Battery Life

Battery Life Of Charging Case

Charge Time

Has Wireless Charging

Has A Battery Level Indicator

Connectivity

Has Usb Type-C

Bluetooth Version

Maximum Bluetooth Range

Has Aac

Has Aptx Adaptive

Microphone

Number Of Microphones

Has A Noise-Canceling Microphone

Highest Mic Frequency

Lowest Mic Frequency

Extras

Has Ambient Sound Mode

Has In/On-Ear Detection

Has Find Earbuds Feature

Supports Fast Charging

Has A Mute Function

Control Panel Placed On A Device

Warranty Period

Has Voice Prompts

Travel Bag Is Included

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