74points

Polk Audio UltraFocus 8000

88points

Sennheiser HD 4.40 BT

Polk Audio UltraFocus 8000
Comparison winner
Sennheiser HD 4.40 BT
vs
vs

31 facts in comparison

Polk Audio UltraFocus 8000 vs Sennheiser HD 4.40 BT

Polk Audio UltraFocus 8000
Sennheiser HD 4.40 BT
Polk Audio UltraFocus 8000
Sennheiser HD 4.40 BT

Why is Polk Audio UltraFocus 8000 better than Sennheiser HD 4.40 BT?

  • 10Hz lower low-frequency
    8Hzvs18Hz
  • Has active noise cancelling (noise reduction)
  • Has an in-line control panel
  • Travel bag is included
  • Has a straight plug
  • Has a removable battery

Why is Sennheiser HD 4.40 BT better than Polk Audio UltraFocus 8000?

  • 14 Ohms lower impedance
    18 Ohmsvs32 Ohms
  • Has a neodymium magnet
  • 3dB/mW higher sound pressure level
    113dB/mWvs110dB/mW
  • Can be used wirelessly
  • Has a battery level indicator
  • Has an L-shaped plug
  • 1 more microphone(s)
    2vs1
  • Has a rechargeable battery

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Top specs and features

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Design

1.has stereo speakers
Polk Audio UltraFocus 8000
Sennheiser HD 4.40 BT

Devices with stereo speakers deliver sound from independent channels on both left and right sides, creating a richer sound and a better experience.

2.has an over-the-ear form
Polk Audio UltraFocus 8000
Sennheiser HD 4.40 BT

Comfortable full-size form with earcups that fully enclose your ears. This model is loved for its increased sound isolation and the fact that it won't leak sound to your neighbors. It offers potential for maximum bass and loudness levels.

3.has a detachable cable
Polk Audio UltraFocus 8000
Sennheiser HD 4.40 BT

With a detachable cable you can use alternative cables, and if the cable is pulled it will pop out instead of breaking.

4.can be folded
Polk Audio UltraFocus 8000
Sennheiser HD 4.40 BT

Folding devices are good for transporting as they take up less space in your bag.

5.has a tangle free cable
Polk Audio UltraFocus 8000
Sennheiser HD 4.40 BT

The cable is designed to minimize tangling.

For example

SoundMagic E11C

6.sweat resistant
Polk Audio UltraFocus 8000
Sennheiser HD 4.40 BT

Resistance to sweat makes it ideal for use while doing sports.

For example

RHA TrueConnect

relevant

Sound quality

1.highest frequency

28000Hz

22000Hz

The highest frequency at which device produces audio. The higher the high-frequency response, the clearer and crispier the treble.

Best

Sony MDR-Z1R

120000Hz

2.lowest frequency

8Hz

18Hz

The lowest frequency at which the device produces audio. The lower the low-frequency response, the stronger and juicier the bass.

Best

Sony MH1CBLK

1Hz

3.has sound isolation/passive noise reduction
Polk Audio UltraFocus 8000
Sennheiser HD 4.40 BT

The device sits tightly in place, creating an acoustic seal which reduces background noise and prevents your music from leaking out.

4.sound pressure level

110dB/mW

113dB/mW

Devices with a higher sound pressure level are generally louder when supplied with any given audio source.

Best

AKG K553 Pro

144dB/mW

5.has a neodymium magnet
Polk Audio UltraFocus 8000
Sennheiser HD 4.40 BT

Devices with neodymium magnets are lighter and more powerful than those which use ferrite magnets. They also have more bass and clear high notes.

6.impedance

32 Ohms

18 Ohms

Impedance is the device’s electrical resistance to the current being pushed through it. The lower the impedance, the easier it is to get higher volume and requires less power.

Best

Flips Solo 2 Social

4 Ohms

relevant

Power

1.has a battery level indicator
Polk Audio UltraFocus 8000
Sennheiser HD 4.40 BT

An indicator shows you when the device has low battery.

2.has a rechargeable battery
Polk Audio UltraFocus 8000
Sennheiser HD 4.40 BT

The battery can be recharged and used over again.

3.has a removable battery
Polk Audio UltraFocus 8000
Sennheiser HD 4.40 BT

The battery is removable and can be replaced by the user if broken.

relevant

Connectivity

1.Can be used wirelessly
Polk Audio UltraFocus 8000
Sennheiser HD 4.40 BT

Wireless devices allow users more freedom of movement.

2.has a 3.5mm male connector
Polk Audio UltraFocus 8000
Sennheiser HD 4.40 BT

A standard 3.5mm male connector is suitable for use with all MP3 players and computer sound cards.

3.supports Bluetooth pairing using NFC
Polk Audio UltraFocus 8000
Sennheiser HD 4.40 BT

Device supports fast Bluetooth pairing using NFC so it can communicate with other devices over Bluetooth. You can fastly pair devices without entering a code by simply holding one device next to the device with which it is to be paired.

4.Has WiFi
Polk Audio UltraFocus 8000
Sennheiser HD 4.40 BT

The device can connect to WiFi.

For example

Meters OV-1 Bluetooth

relevant

Features

1.control panel placed on a device
Polk Audio UltraFocus 8000
Sennheiser HD 4.40 BT

There is a control panel on the device 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.

2.can be used as a headset
Polk Audio UltraFocus 8000
Sennheiser HD 4.40 BT

A headset is one headphone or pair with a built-in microphone. Headsets can be used for applications which require communication i.e. Skype, games with voice chat, mobile phones etc.

3.has an in-line control panel
Polk Audio UltraFocus 8000
Sennheiser HD 4.40 BT

There is a control panel on the cable, so you can easily operate the device without having to interact with it.

4.number of microphones

1

2

More microphones result in better sound quality and enable the device to filter out background noise.

Best

Parrot Zik Sport

8

5.has a noise canceling microphone
Polk Audio UltraFocus 8000
Sennheiser HD 4.40 BT

These microphones are designed to filter out background noise from the desired sound. Especially useful in noisy environments.

For example

Microsoft Surface Headphones

Top 10 headphones

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