Beats Solo 4 vs Beats Solo HD

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Solo 4 compared with Solo HD

	BeatsSolo 4	BeatsSolo HD
Overview
Released
Released	May 2024	February 2010
Sound
Type
Type	On-ear	On-ear
Noise cancelling
Noise cancelling	No	No
Transparency mode
Transparency mode	No	–
Spatial audio with head tracking
Spatial audio with head tracking	Yes	–
Driver size
Driver size	40 mm	–
Back
Back	Closed	–
Bluetooth codecs
Bluetooth codecs	SBC and AAC	None (wired)
Lossless over USB-C
Lossless over USB-C	Yes	–
Drivers
Drivers	Custom-built 40 mm transducers	Original maker announcement describes redesigned drivers; no diameter is published in the sources read.
Noise cancelling detail
Noise cancelling detail	–	Passive isolation from the ear pads, described by What Hi-Fi? and AVForums; no active noise cancelling.
Audio features
Audio features	Personalised Spatial Audio with dynamic head tracking on compatible Apple devices; creating a personalised profile requires an iPhone with a TrueDepth camera; lossless audio over USB-C	–
Battery
Listening time (maker's claim)
Listening time (maker's claim)	Up to 50 hours	No battery (wired)
Battery life detail
Battery life detail	Apple's playback test used 256 Kbps AAC tracks at 50% volume; 3.5 mm passive playback requires no battery power; USB-C audio can play while charging	–
Fast charging
Fast charging	Fast Fuel gives up to 5 hours of playback from 10 minutes of charging	–
Design
Weight
Weight	217 g	–
Bluetooth
Bluetooth	5.3	–
Two devices at once
Two devices at once	No	–
Headphone cable
Headphone cable	Yes	Yes
Controls
Controls	Physical b button for playback and calls; volume buttons and power button; Siri on compatible Apple devices	In-line remote supports playback, track skipping and scanning, calls, voice commands and volume; functionality varies by device.
Microphones
Microphones	Multiple digital beamforming microphones with a voice-targeting algorithm	Microphone built into the detachable remote cable.
Fit and ear tips
Fit and ear tips	Folding headband with brushed metal hinges, ergonomically angled ear cups and UltraPlush cushions	On-ear design with folding hinges; AVForums describes metal hinges, pivoting ear pads and a padded headband.
Dimensions
Dimensions	Length 17.7 cm, width 15.8 cm, height 6.8 cm (Beats' published dimensions)	–
Water resistance detail
Water resistance detail	No water or sweat resistance rating published	–
Works with
Works with	Class 1 Bluetooth; one-touch pairing and automatic pre-pairing across iCloud or Google accounts, Apple Find My and Android Find My Device; SBC and AAC codecs (SoundGuys); no simultaneous Bluetooth multipoint (TechRadar)	Analogue audio through a detachable 3.5 mm cable. The original Monster manual lists remote and microphone support for specific iPod, iPhone and iPad models; the later Beats guide also lists HTC, BlackBerry and Android with device-dependent functions.
Colours
Colours	Matte Black, Slate Blue, Cloud Pink	AVForums' reviewed range includes black, white and red. The maker confirmed the PRODUCT(RED) edition was already available on 5 February 2010; its general launch announcement had stated March 2010.
In the box
In the box	Headphones, carrying case, USB-C to USB-C cable, 3.5 mm audio cable, quick start guide and warranty card	Maker announcement lists a carrying case. AVForums' reviewed bundle includes two detachable cables, one with an in-line microphone remote; bundles may differ.