HEADPHONES · YOUR NEXT FACE-OFF

Beyerdynamic MMX 300 PRO vs HyperX Cloud III

Real specs. Clear sources.Exact models · UK & US buying links

Compared products

YOUR FIRST CHOICE

Beyerdynamic MMX 300 PRO

730670 · black · wired gaming headset

Full product profile Official image

Exact model & source notes

The MMX 300 PRO (article 730670, black) is beyerdynamic's closed-back, around-ear wired gaming headset with a 48-ohm STELLAR.45 dynamic driver and a cardioid condenser boom microphone. It connects by a detachable cable with separate 3.5 mm headphone and microphone plugs, plus an adapter for single combination jacks.

Specifications checked 26 Sept 2026.

Amazon links open search results. Check the exact variant, current price and availability with the retailer.

Manufacturer specifications

WHICH SUITS YOU?

Choose the Beyerdynamic MMX 300 PRO for

Lower stated nominal impedance: 48 ohm vs 64 ohm

Choose the HyperX Cloud III for

Higher stated nominal impedance: 64 ohm vs 48 ohm

Built from verified specifications that differ. Not a rating or a recommendation.

See the 9 verified differences

THE CONTENDER

HyperX Cloud III

727A8AA · Black · wired

Full product profile Official image

Exact model & source notes

The HyperX Cloud III (SKU 727A8AA, black) is a closed-back, over-ear wired gaming headset with angled 53 mm drivers, a full metal (aluminium) frame, ear-cup volume and mic-mute controls, a detachable 10 mm noise-cancelling microphone and a USB dongle alongside its 3.5 mm connection. HyperX lists it for PC, PlayStation, Xbox, Switch, Mac and mobile.

Specifications checked 26 Sept 2026.

Amazon links open search results. Check the exact variant, current price and availability with the retailer.

Manufacturer specifications

Beyerdynamic MMX 300 PRO UK & US retailers

UK & US price history: no verified listing yet

HyperX Cloud III UK & US retailers

UK & US price history: no verified listing yet

Search links open retailer results, not a matched listing; eBay listings are checked daily. As an Amazon Associate I earn from qualifying purchases. As an eBay Partner, we may be compensated if you make a purchase.

THE DIFFERENCES, MADE VISIBLE

Visual facts

Differences first. Select a topic for its graphic, sources and conditions.

How to read this comparison

Manufacturer facts for the exact models shown. Not a quality rating or a test result.
“Different” means the known values differ, not that one is better.
Missing or conflicting evidence is marked and never counts as a difference. Source chips hold each fact’s sources and conditions.

FEATURES SIDE BY SIDE7 topics

Yes and No describe the listed feature. Missing evidence stays unverified.

SELECTED TOPIC

01 / 07

Impedance

Nominal electrical load, not sound quality or loudness. Output capability and headphone sensitivity matter together; impedance alone cannot decide whether an amplifier is needed.

Beyerdynamic MMX 300 PRO48 Ω

Source 1 Source 2

HyperX Cloud III64 Ω

Manufacturer specification · Listed on the UK page only; the US page omits impedance.

Source 1

Explore the full specifications

Start with your listening environment. Open and closed earcups suit different surroundings. A closed back is not the same as active noise cancellation. Check the exact cable and headphone output. We do not turn impedance, driver size or unpaired lab results into a sound-quality score.

WHAT CHANGES BETWEEN THEM?

Key differences

Full specifications ↓

9 verified differences, most decision-relevant first. 1 is also drawn in Visual facts above. 1 feature is the same under different published names, grouped below. Missing information stays separate.

Wired / wireless connections

Beyerdynamic MMX 300 PROWired; detachable single-sided 2.5 m cable ending in two 3.5 mm plugs (headphone and microphone), plus a supplied adapter to a single 3.5 mm combination jack

HyperX Cloud IIIWired: 3.5 mm, plus a USB dongle for USB-C, and USB-A via the supplied adapter

Sources

Beyerdynamic MMX 300 PRO

Manufacturer specification · The cable connects to the headset with a 5-pole jack plug.

beyerdynamic MMX 300 PRO — official product page and technical data (global store)beyerdynamic MMX 300 PRO — spec sheet E2/MMX 300 PRO (06.24)

HyperX Cloud III

Manufacturer specification · No wireless connection. The USB dongle supports 16- and 24-bit audio (USB 2.0).

HyperX Cloud III – Gaming Headset — official HyperX UK product page and specifications HyperX Cloud III – Gaming Headset — official HyperX US product page and technical specifications

Check the exact configuration and source conditions for your use.

Nominal impedance

In Visual facts

Beyerdynamic MMX 300 PRO48 ohm

HyperX Cloud III64 ohm

Sources

Beyerdynamic MMX 300 PRO

Manufacturer specification

beyerdynamic MMX 300 PRO — official product page and technical data (global store)beyerdynamic MMX 300 PRO — spec sheet E2/MMX 300 PRO (06.24)

HyperX Cloud III

Manufacturer specification · Listed on the UK page only; the US page omits impedance.

HyperX Cloud III – Gaming Headset — official HyperX UK product page and specifications

Check the exact configuration and source conditions for your use.

Driver construction

Beyerdynamic MMX 300 PRODynamic STELLAR.45 driver

HyperX Cloud IIIDynamic, 53 mm with neodymium magnets (angled)

Sources

Beyerdynamic MMX 300 PRO

Manufacturer specification · beyerdynamic's driver name; a diameter is not stated in the sources read.

beyerdynamic MMX 300 PRO — official product page and technical data (global store)beyerdynamic MMX 300 PRO — spec sheet E2/MMX 300 PRO (06.24)

HyperX Cloud III

Manufacturer specification

HyperX Cloud III – Gaming Headset — official HyperX UK product page and specifications

Check whether the diameter describes the complete transducer or only its diaphragm. Different labels and driver sizes do not establish better sound.

Rated total harmonic distortion

Beyerdynamic MMX 300 PRO<0.05% at 500 Hz

HyperX Cloud III<2%

Sources

Beyerdynamic MMX 300 PRO

Manufacturer specification

beyerdynamic MMX 300 PRO — spec sheet E2/MMX 300 PRO (06.24)

HyperX Cloud III

Manufacturer specification · HyperX does not state the test frequency or level for this figure.

HyperX Cloud III – Gaming Headset — official HyperX UK product page and specifications HyperX Cloud III – Gaming Headset — official HyperX US product page and technical specifications

These published limits can use different input voltages, loudness levels and standards. They cannot establish lower distortion in matched listening conditions.

Earpads

Beyerdynamic MMX 300 PROVelour, replaceable (spare part 1000502); headband pad also replaceable

HyperX Cloud IIIMemory foam with premium leatherette

Sources

Beyerdynamic MMX 300 PRO

Manufacturer specification

beyerdynamic MMX 300 PRO — official product page and technical data (global store)beyerdynamic MMX 300 PRO — spec sheet E2/MMX 300 PRO (06.24)

HyperX Cloud III

Manufacturer specification

HyperX Cloud III – Gaming Headset — official HyperX US product page and technical specifications

Check the exact configuration and source conditions for your use.

Rated frequency range

Beyerdynamic MMX 300 PRO5–40,000 Hz

HyperX Cloud III10 Hz – 21 kHz

Sources

Beyerdynamic MMX 300 PRO

Manufacturer specification

beyerdynamic MMX 300 PRO — official product page and technical data (global store)beyerdynamic MMX 300 PRO — spec sheet E2/MMX 300 PRO (06.24)

HyperX Cloud III

Manufacturer specification

HyperX Cloud III – Gaming Headset — official HyperX UK product page and specifications HyperX Cloud III – Gaming Headset — official HyperX US product page and technical specifications

Range endpoints need their stated threshold. They do not describe response flatness or prove better bass, detail or sound quality.

Show 3 more verified differences

Microphone specifications

Beyerdynamic MMX 300 PROCardioid back-electret condenser; 20–20,000 Hz; 21.6 mV/Pa at 1 kHz; max. SPL 121 dB; 13 mm capsule; boom approx. 190 mm

HyperX Cloud IIIDetachable electret condenser, unidirectional, noise-cancelling; −42 dBV (0 dB = 1 V/Pa at 1 kHz)

Sources

Beyerdynamic MMX 300 PRO

Manufacturer specification

beyerdynamic MMX 300 PRO — spec sheet E2/MMX 300 PRO (06.24)

HyperX Cloud III

Manufacturer specification

HyperX Cloud III – Gaming Headset — official HyperX UK product page and specifications

Check the exact configuration and source conditions for your use.

Platform compatibility

Beyerdynamic MMX 300 PROPlayStation, Xbox, Nintendo Switch and smartphones via cable; PC via separate headphone and microphone plugs

HyperX Cloud IIIPC, PS5, PS4, Xbox Series X|S, Xbox One, Nintendo Switch, Mac, mobile

Sources

Beyerdynamic MMX 300 PRO

Manufacturer specification · Analogue 3.5 mm connection only; no USB or wireless connection is listed.

beyerdynamic MMX 300 PRO — official product page and technical data (global store)beyerdynamic MMX 300 PRO — spec sheet E2/MMX 300 PRO (06.24)

HyperX Cloud III

Manufacturer specification

HyperX Cloud III – Gaming Headset — official HyperX UK product page and specifications

Check the exact configuration and source conditions for your use.

Rated sensitivity

Beyerdynamic MMX 300 PRO96 dB SPL at 1 mW / 500 Hz

HyperX Cloud III100 dB SPL/mW at 1 kHz

Sources

Beyerdynamic MMX 300 PRO

Manufacturer specification

beyerdynamic MMX 300 PRO — official product page and technical data (global store)beyerdynamic MMX 300 PRO — spec sheet E2/MMX 300 PRO (06.24)

HyperX Cloud III

Manufacturer specification · dB/mW reference.

HyperX Cloud III – Gaming Headset — official HyperX UK product page and specifications HyperX Cloud III – Gaming Headset — official HyperX US product page and technical specifications

Keep the frequency and voltage or power reference attached. Sensitivity describes output for an input, not sound quality; dB/V and dB/mW are different measures.

Same feature, different names (1)

The sources publish different names for the same feature. Both names and their sources are shown; they are not counted as differences.

Wearing style

Beyerdynamic MMX 300 PROOver-ear (circumaural), closed-back wired gaming headset with boom microphone

HyperX Cloud IIIOver-ear (circumaural), closed-back wired gaming headset

Sources

Beyerdynamic MMX 300 PRO

Manufacturer specification

beyerdynamic MMX 300 PRO — official product page and technical data (global store)beyerdynamic MMX 300 PRO — spec sheet E2/MMX 300 PRO (06.24)

HyperX Cloud III

Manufacturer specification

HyperX Cloud III – Gaming Headset — official HyperX UK product page and specifications HyperX Cloud III – Gaming Headset — official HyperX US product page and technical specifications

Both sources state the same feature under different published names. This is not a verified difference; check the exact feature you need.

Small physical differences (1)

Weight without cable

Beyerdynamic MMX 300 PRO314 g

HyperX Cloud III308 g

Sources

Beyerdynamic MMX 300 PRO

Manufacturer specification · The product pages state 314 g without cable; the spec sheet gives 314 g without stating the basis.

beyerdynamic MMX 300 PRO — official product page and technical data (global store)beyerdynamic MMX 300 PRO — official North America store page and technical data beyerdynamic MMX 300 PRO — spec sheet E2/MMX 300 PRO (06.24)

HyperX Cloud III

Manufacturer specification · Without microphone; 320 g with the microphone attached (UK page). The US page lists 0.67 lb / 0.70 lb.

HyperX Cloud III – Gaming Headset — official HyperX UK product page and specifications HyperX Cloud III – Gaming Headset — official HyperX US product page and technical specifications

A size or weight trade-off; it does not establish the better product.

Missing or non-comparable evidence (11)

Active noise cancellation

Beyerdynamic MMX 300 PRONot verified

HyperX Cloud IIINot verified

Sources

Beyerdynamic MMX 300 PRO

The reviewed exact sources do not explicitly establish active noise cancellation absence. Preserve separately sourced acoustic design and passive attenuation; they cannot turn omitted ANC into a false capability. · Manufacturer specification

beyerdynamic MMX 300 PRO — official product page and technical data (global store)beyerdynamic MMX 300 PRO — spec sheet E2/MMX 300 PRO (06.24)

HyperX Cloud III

The reviewed exact sources do not explicitly establish active noise cancellation presence or absence for listening. Preserve separately documented microphone noise reduction, closed construction or passive attenuation; none negates active ANC. · Manufacturer specification

HyperX Cloud III – Gaming Headset — official HyperX UK product page and specifications

Evidence is missing or conflicting on at least one side. This is not a verified difference.

Battery life

Beyerdynamic MMX 300 PRONot verified

HyperX Cloud IIINot verified

Sources

Beyerdynamic MMX 300 PRO

The reviewed exact sources do not explicitly establish battery life or that no battery is required for operation. A wired/dynamic audio path, omitted charger or Battery included N is not an explicit operating-power requirement. The microphone’s separately documented AB supply of 2–9 V/0.6 mA remains known; it does not establish every power requirement of the whole headset. · Manufacturer specification

beyerdynamic MMX 300 PRO — official product page and technical data (global store)beyerdynamic MMX 300 PRO — spec sheet E2/MMX 300 PRO (06.24)

HyperX Cloud III

The reviewed exact sources do not explicitly establish battery life or a whole-device no-battery operating requirement. A wired connection, omitted charger or Battery included N does not establish not-required. · Manufacturer specification

HyperX Cloud III – Gaming Headset — official HyperX UK product page and specifications

Evidence is missing or conflicting on at least one side. This is not a verified difference.

Supplied cables

Beyerdynamic MMX 300 PRONot verified

HyperX Cloud IIIHeadset cable 3.93 ft; USB dongle cable 4.26 ft

Sources

Beyerdynamic MMX 300 PRO

No source recorded for this side.

HyperX Cloud III

Manufacturer specification · HyperX lists imperial lengths only.

HyperX Cloud III – Gaming Headset — official HyperX US product page and technical specifications

Evidence is missing or conflicting on at least one side. This is not a verified difference.

Cable length

Beyerdynamic MMX 300 PRO2.5 m

HyperX Cloud IIINot verified

Sources

Beyerdynamic MMX 300 PRO

Manufacturer specification

beyerdynamic MMX 300 PRO — spec sheet E2/MMX 300 PRO (06.24)

HyperX Cloud III

No source recorded for this side.

Evidence is missing or conflicting on at least one side. This is not a verified difference.

Controls

Beyerdynamic MMX 300 PRONot verified

HyperX Cloud IIIOnboard ear-cup controls for headphone volume and microphone mute

Sources

Beyerdynamic MMX 300 PRO

No source recorded for this side.

HyperX Cloud III

Manufacturer specification

HyperX Cloud III – Gaming Headset — official HyperX UK product page and specifications HyperX Cloud III – Gaming Headset — official HyperX US product page and technical specifications

Evidence is missing or conflicting on at least one side. This is not a verified difference.

Driver size

Beyerdynamic MMX 300 PRONot verified

HyperX Cloud III53 mm

Sources

Beyerdynamic MMX 300 PRO

No source recorded for this side.

HyperX Cloud III

Manufacturer specification

HyperX Cloud III – Gaming Headset — official HyperX UK product page and specifications

Evidence is missing or conflicting on at least one side. This is not a verified difference.

Headband pressure

Beyerdynamic MMX 300 PRO5.5 N

HyperX Cloud IIINot verified

Sources

Beyerdynamic MMX 300 PRO

Manufacturer specification

beyerdynamic MMX 300 PRO — spec sheet E2/MMX 300 PRO (06.24)

HyperX Cloud III

No source recorded for this side.

Evidence is missing or conflicting on at least one side. This is not a verified difference.

In the box

Beyerdynamic MMX 300 PRONot verified

HyperX Cloud IIIHeadset, detachable microphone, USB dongle, USB-C to USB-A adapter, quick start guide

Sources

Beyerdynamic MMX 300 PRO

No source recorded for this side.

HyperX Cloud III

Manufacturer specification

HyperX Cloud III – Gaming Headset — official HyperX UK product page and specifications

Evidence is missing or conflicting on at least one side. This is not a verified difference.

Frame materials

Beyerdynamic MMX 300 PRONot verified

HyperX Cloud IIIFull metal frame (aluminium)

Sources

Beyerdynamic MMX 300 PRO

No source recorded for this side.

HyperX Cloud III

Manufacturer specification

HyperX Cloud III – Gaming Headset — official HyperX UK product page and specifications HyperX Cloud III – Gaming Headset — official HyperX US product page and technical specifications

Evidence is missing or conflicting on at least one side. This is not a verified difference.

Ambient noise attenuation

Beyerdynamic MMX 300 PRO18 dBA

HyperX Cloud IIINot verified

Sources

Beyerdynamic MMX 300 PRO

Manufacturer specification · Passive attenuation rated by beyerdynamic.

beyerdynamic MMX 300 PRO — spec sheet E2/MMX 300 PRO (06.24)

HyperX Cloud III

No source recorded for this side.

Evidence is missing or conflicting on at least one side. This is not a verified difference.

Power handling

Beyerdynamic MMX 300 PRO30 mW

HyperX Cloud IIINot verified

Sources

Beyerdynamic MMX 300 PRO

Manufacturer specification

beyerdynamic MMX 300 PRO — spec sheet E2/MMX 300 PRO (06.24)

HyperX Cloud III

No source recorded for this side.

Evidence is missing or conflicting on at least one side. This is not a verified difference.

2 shared fields have the same recorded value.

YOUR HEADPHONES. YOUR RULES.

Check against your must-haves

Feature matching for the features you select. It doesn’t rate sound or comfort.

Start with your listening setup.

Choose a starting point, then fine-tune your must-haves.

FINE-TUNE THE DETAILS

Your essentials.

These shortcuts select the features shown above. Check the fit against your own equipment and listening space.

A feature match describes the selected requirements. It doesn’t rate sound or comfort.

Open-back designFor a quiet listening spaceClosed-back designAn enclosed outer earcupDetachable cableUnplug the cable at the headphonesBuilt-in microphoneFor calls and voice chatActive noise cancellationNot the same as a closed back

YOUR CHOICE

Beyerdynamic MMX 300 PRO

Select a feature to check your fit.

YOUR CHOICE

HyperX Cloud III

Select a feature to check your fit.

Feature matching, not a sound-quality score. The specification table links to the evidence for each feature.

WHAT EACH CHOICE ASKS OF YOU

What it brings and what to check

Beyerdynamic MMX 300 PRO

What it brings

The analogue connection with a supplied combination-jack adapter lets the same headset plug into a PC's separate audio jacks or the combination jack of a console, tablet or phone.
Manufacturer source Manufacturer source
The boom microphone is a cardioid condenser with a published 20–20,000 Hz range and sensitivity, so its pickup can be checked against other headsets' specifications.
Manufacturer source

What to check

Ambient noise attenuation is rated at 18 dBA. The supplied audio cable uses separate 3.5 mm headphone and microphone plugs, plus a combination-jack adapter.
Manufacturer source Manufacturer source
Official sources disagree on the inline remote: the spec sheet mentions a cable with an integrated remote control, while the product page lists the headset as without remote.
Manufacturer source Manufacturer source

HyperX Cloud III

What it brings

One headset covers 3.5 mm, USB-C and USB-A: the 3.5 mm plug suits devices with a headphone jack, and the supplied USB dongle and adapter cover USB-C and USB-A ports.
Manufacturer source
HyperX lists compatibility with PC, PS5, PS4, Xbox Series X|S, Xbox One, Nintendo Switch, Mac and mobile.
Manufacturer source

What to check

The documented audio connections are 3.5 mm and the supplied USB dongle. The “noise-cancelling” label applies to the microphone; active noise cancellation for listening remains unestablished.
Manufacturer source
HyperX lists 308 g without the microphone and 320 g with it, and publishes cable lengths only in feet on its US page.
Manufacturer source Manufacturer source

COMPARE THE DETAILS

Full specifications

How we verify

Differences only

24 of 24 specifications Sources in each row

Source-backed specifications for Beyerdynamic MMX 300 PRO and HyperX Cloud III
Specification	Beyerdynamic MMX 300 PRO	HyperX Cloud III

Wearing style Sources Beyerdynamic MMX 300 PRO Manufacturer specification beyerdynamic MMX 300 PRO — official product page and technical data (global store)beyerdynamic MMX 300 PRO — spec sheet E2/MMX 300 PRO (06.24) HyperX Cloud III Manufacturer specification HyperX Cloud III – Gaming Headset — official HyperX UK product page and specifications HyperX Cloud III – Gaming Headset — official HyperX US product page and technical specifications	Over-ear (circumaural), closed-back wired gaming headset with boom microphone	Over-ear (circumaural), closed-back wired gaming headset
Weight without cableDifferent Sources Beyerdynamic MMX 300 PRO Manufacturer specification · The product pages state 314 g without cable; the spec sheet gives 314 g without stating the basis. beyerdynamic MMX 300 PRO — official product page and technical data (global store)beyerdynamic MMX 300 PRO — official North America store page and technical data beyerdynamic MMX 300 PRO — spec sheet E2/MMX 300 PRO (06.24) HyperX Cloud III Manufacturer specification · Without microphone; 320 g with the microphone attached (UK page). The US page lists 0.67 lb / 0.70 lb. HyperX Cloud III – Gaming Headset — official HyperX UK product page and specifications HyperX Cloud III – Gaming Headset — official HyperX US product page and technical specifications	314 g	308 g
Acoustic design Sources Beyerdynamic MMX 300 PRO Manufacturer specification beyerdynamic MMX 300 PRO — official product page and technical data (global store)beyerdynamic MMX 300 PRO — spec sheet E2/MMX 300 PRO (06.24) HyperX Cloud III Manufacturer specification HyperX Cloud III – Gaming Headset — official HyperX UK product page and specifications	Closed-back	Closed-back
Headband pressure Sources Beyerdynamic MMX 300 PRO Manufacturer specification beyerdynamic MMX 300 PRO — spec sheet E2/MMX 300 PRO (06.24) HyperX Cloud III No source recorded.	5.5 N	Not provided
EarpadsDifferent Sources Beyerdynamic MMX 300 PRO Manufacturer specification beyerdynamic MMX 300 PRO — official product page and technical data (global store)beyerdynamic MMX 300 PRO — spec sheet E2/MMX 300 PRO (06.24) HyperX Cloud III Manufacturer specification HyperX Cloud III – Gaming Headset — official HyperX US product page and technical specifications	Velour, replaceable (spare part 1000502); headband pad also replaceable	Memory foam with premium leatherette
Frame materials Sources Beyerdynamic MMX 300 PRO No source recorded. HyperX Cloud III Manufacturer specification HyperX Cloud III – Gaming Headset — official HyperX UK product page and specifications HyperX Cloud III – Gaming Headset — official HyperX US product page and technical specifications	Not provided	Full metal frame (aluminium)

Wired / wireless connectionsDifferent Sources Beyerdynamic MMX 300 PRO Manufacturer specification · The cable connects to the headset with a 5-pole jack plug. beyerdynamic MMX 300 PRO — official product page and technical data (global store)beyerdynamic MMX 300 PRO — spec sheet E2/MMX 300 PRO (06.24) HyperX Cloud III Manufacturer specification · No wireless connection. The USB dongle supports 16- and 24-bit audio (USB 2.0). HyperX Cloud III – Gaming Headset — official HyperX UK product page and specifications HyperX Cloud III – Gaming Headset — official HyperX US product page and technical specifications	Wired; detachable single-sided 2.5 m cable ending in two 3.5 mm plugs (headphone and microphone), plus a supplied adapter to a single 3.5 mm combination jack	Wired: 3.5 mm, plus a USB dongle for USB-C, and USB-A via the supplied adapter
Cable length Sources Beyerdynamic MMX 300 PRO Manufacturer specification beyerdynamic MMX 300 PRO — spec sheet E2/MMX 300 PRO (06.24) HyperX Cloud III No source recorded.	2.5 m	Not provided
Platform compatibilityDifferent Sources Beyerdynamic MMX 300 PRO Manufacturer specification · Analogue 3.5 mm connection only; no USB or wireless connection is listed. beyerdynamic MMX 300 PRO — official product page and technical data (global store)beyerdynamic MMX 300 PRO — spec sheet E2/MMX 300 PRO (06.24) HyperX Cloud III Manufacturer specification HyperX Cloud III – Gaming Headset — official HyperX UK product page and specifications	PlayStation, Xbox, Nintendo Switch and smartphones via cable; PC via separate headphone and microphone plugs	PC, PS5, PS4, Xbox Series X\|S, Xbox One, Nintendo Switch, Mac, mobile
Supplied cables Sources Beyerdynamic MMX 300 PRO No source recorded. HyperX Cloud III Manufacturer specification · HyperX lists imperial lengths only. HyperX Cloud III – Gaming Headset — official HyperX US product page and technical specifications	Not provided	Headset cable 3.93 ft; USB dongle cable 4.26 ft

Driver constructionDifferent Sources Beyerdynamic MMX 300 PRO Manufacturer specification · beyerdynamic's driver name; a diameter is not stated in the sources read. beyerdynamic MMX 300 PRO — official product page and technical data (global store)beyerdynamic MMX 300 PRO — spec sheet E2/MMX 300 PRO (06.24) HyperX Cloud III Manufacturer specification HyperX Cloud III – Gaming Headset — official HyperX UK product page and specifications	Dynamic STELLAR.45 driver	Dynamic, 53 mm with neodymium magnets (angled)
Nominal impedanceDifferent Sources Beyerdynamic MMX 300 PRO Manufacturer specification beyerdynamic MMX 300 PRO — official product page and technical data (global store)beyerdynamic MMX 300 PRO — spec sheet E2/MMX 300 PRO (06.24) HyperX Cloud III Manufacturer specification · Listed on the UK page only; the US page omits impedance. HyperX Cloud III – Gaming Headset — official HyperX UK product page and specifications	48 ohm	64 ohm
Rated frequency rangeDifferent Sources Beyerdynamic MMX 300 PRO Manufacturer specification beyerdynamic MMX 300 PRO — official product page and technical data (global store)beyerdynamic MMX 300 PRO — spec sheet E2/MMX 300 PRO (06.24) HyperX Cloud III Manufacturer specification HyperX Cloud III – Gaming Headset — official HyperX UK product page and specifications HyperX Cloud III – Gaming Headset — official HyperX US product page and technical specifications	5–40,000 Hz	10 Hz – 21 kHz
Rated sensitivityDifferent Sources Beyerdynamic MMX 300 PRO Manufacturer specification beyerdynamic MMX 300 PRO — official product page and technical data (global store)beyerdynamic MMX 300 PRO — spec sheet E2/MMX 300 PRO (06.24) HyperX Cloud III Manufacturer specification · dB/mW reference. HyperX Cloud III – Gaming Headset — official HyperX UK product page and specifications HyperX Cloud III – Gaming Headset — official HyperX US product page and technical specifications	96 dB SPL at 1 mW / 500 Hz	100 dB SPL/mW at 1 kHz
Rated total harmonic distortionDifferent Sources Beyerdynamic MMX 300 PRO Manufacturer specification beyerdynamic MMX 300 PRO — spec sheet E2/MMX 300 PRO (06.24) HyperX Cloud III Manufacturer specification · HyperX does not state the test frequency or level for this figure. HyperX Cloud III – Gaming Headset — official HyperX UK product page and specifications HyperX Cloud III – Gaming Headset — official HyperX US product page and technical specifications	<0.05% at 500 Hz	<2%
Power handling Sources Beyerdynamic MMX 300 PRO Manufacturer specification beyerdynamic MMX 300 PRO — spec sheet E2/MMX 300 PRO (06.24) HyperX Cloud III No source recorded.	30 mW	Not provided
Driver size Sources Beyerdynamic MMX 300 PRO No source recorded. HyperX Cloud III Manufacturer specification HyperX Cloud III – Gaming Headset — official HyperX UK product page and specifications	Not provided	53 mm

Microphone Sources Beyerdynamic MMX 300 PRO Manufacturer specification · Cardioid back-electret condenser boom microphone; boom approx. 190 mm. beyerdynamic MMX 300 PRO — official product page and technical data (global store)beyerdynamic MMX 300 PRO — spec sheet E2/MMX 300 PRO (06.24) HyperX Cloud III Manufacturer specification · Detachable 10 mm electret condenser microphone, unidirectional, noise-cancelling, with LED mute indicator. HyperX Cloud III – Gaming Headset — official HyperX UK product page and specifications	Yes	Yes
Ambient noise attenuation Sources Beyerdynamic MMX 300 PRO Manufacturer specification · Passive attenuation rated by beyerdynamic. beyerdynamic MMX 300 PRO — spec sheet E2/MMX 300 PRO (06.24) HyperX Cloud III No source recorded.	18 dBA	Not provided
Microphone specificationsDifferent Sources Beyerdynamic MMX 300 PRO Manufacturer specification beyerdynamic MMX 300 PRO — spec sheet E2/MMX 300 PRO (06.24) HyperX Cloud III Manufacturer specification HyperX Cloud III – Gaming Headset — official HyperX UK product page and specifications	Cardioid back-electret condenser; 20–20,000 Hz; 21.6 mV/Pa at 1 kHz; max. SPL 121 dB; 13 mm capsule; boom approx. 190 mm	Detachable electret condenser, unidirectional, noise-cancelling; −42 dBV (0 dB = 1 V/Pa at 1 kHz)

Controls Sources Beyerdynamic MMX 300 PRO No source recorded. HyperX Cloud III Manufacturer specification HyperX Cloud III – Gaming Headset — official HyperX UK product page and specifications HyperX Cloud III – Gaming Headset — official HyperX US product page and technical specifications	Not provided	Onboard ear-cup controls for headphone volume and microphone mute

In the box Sources Beyerdynamic MMX 300 PRO No source recorded. HyperX Cloud III Manufacturer specification HyperX Cloud III – Gaming Headset — official HyperX UK product page and specifications	Not provided	Headset, detachable microphone, USB dongle, USB-C to USB-A adapter, quick start guide

Show unverified (2)Not verified, not provided or conflicting for both products. Kept for completeness; never counted as a difference.

Specifications without verified values for either product
Active noise cancellation Sources Beyerdynamic MMX 300 PRO The reviewed exact sources do not explicitly establish active noise cancellation absence. Preserve separately sourced acoustic design and passive attenuation; they cannot turn omitted ANC into a false capability. · Manufacturer specification beyerdynamic MMX 300 PRO — official product page and technical data (global store)beyerdynamic MMX 300 PRO — spec sheet E2/MMX 300 PRO (06.24) HyperX Cloud III The reviewed exact sources do not explicitly establish active noise cancellation presence or absence for listening. Preserve separately documented microphone noise reduction, closed construction or passive attenuation; none negates active ANC. · Manufacturer specification HyperX Cloud III – Gaming Headset — official HyperX UK product page and specifications	Not listed by the manufacturer	Not listed by the manufacturer
Battery life Sources Beyerdynamic MMX 300 PRO The reviewed exact sources do not explicitly establish battery life or that no battery is required for operation. A wired/dynamic audio path, omitted charger or Battery included N is not an explicit operating-power requirement. The microphone’s separately documented AB supply of 2–9 V/0.6 mA remains known; it does not establish every power requirement of the whole headset. · Manufacturer specification beyerdynamic MMX 300 PRO — official product page and technical data (global store)beyerdynamic MMX 300 PRO — spec sheet E2/MMX 300 PRO (06.24) HyperX Cloud III The reviewed exact sources do not explicitly establish battery life or a whole-device no-battery operating requirement. A wired connection, omitted charger or Battery included N does not establish not-required. · Manufacturer specification HyperX Cloud III – Gaming Headset — official HyperX UK product page and specifications	Not listed by the manufacturer	Not listed by the manufacturer

First product manufacturer source Second product manufacturer source

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Cable length: 2.5 m
Wearing style: Over-ear (circumaural), open-back wired gaming headset with boom microphone

Prices & product profile

Each record represents an explicitly checked model and configuration. Original import: 5 Sept 2026; this is not its verification date. This is not a list of current offers or a popularity ranking.