Amazon Fire TV Cube (2nd Gen) vs Roku Ultra (4800)

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Fire TV Cube (2nd Gen) compared with Ultra (4800)

	AmazonFire TV Cube (2nd Gen)	RokuUltra (4800)
Overview
Released
Released	October 2019	October 2020
Video and audio
Resolution
Resolution	4K	4K
HDR
HDR	Dolby Vision, HDR10+, HDR10 and HLG (better)	HDR10, Dolby Vision and HLG
Dolby Atmos
Dolby Atmos	Yes	Yes
Video
Video	HEVC hardware decoding up to 2160p at 60 fps; H.264 up to 4K 30 fps or 1080p 60 fps; VP9 up to 2160p 60 fps with limitations	Up to 4K at 60 fps; Roku's model-4800 guide specifies an HDCP 2.2 HDMI connection for 4K
HDR
HDR	Dolby Vision, HDR10, HDR10+ and HLG	Roku's current Benjamin/4800X developer row lists HDR10, Dolby Vision and HLG. An older model-4800 support document also claims HDR10+, which the developer row omits; HDR10+ is left out of the main field pending reconciliation
Audio
Audio	Dolby Atmos over Dolby Digital Plus for compatible equipment and supported titles; Dolby Digital and Dolby Digital Plus; built-in speaker for Alexa responses	Dolby Atmos with compatible content and sound system; TechRadar lists AAC, MP3, WMA, FLAC, PCM, AC3/EAC3, DTS and ALAC support
Performance
Software
Software	Fire OS	Roku OS
Storage
Storage	16 GB	–
Chip details
Chip details	Amlogic S922X; hexa-core CPU with four cores up to 2.2 GHz and two up to 1.9 GHz; Arm Mali G52-MP2 (3EE) GPU at 800 MHz; 32-bit application support	Quad-core processor (Roku launch announcement); Roku's Benjamin/4800X developer row identifies Arm Cortex-A55
Memory
Memory	2 GB DDR4-2400 RAM, as listed by Amazon’s developer specifications	2 GB (Roku's Benjamin/4800X developer row)
Storage
Storage	16 GB internal storage; operating software occupies part of it	–
Software and services
Software and services	Fire OS 7 based on Android 9 (API level 28); developer build model AFTR	Roku OS; OS 9.4 was announced alongside the player. AirPlay 2 and HomeKit were added after launch, as confirmed in Tom's Guide's review; apps and features vary by country and software version
Connections
Wi-Fi
Wi-Fi	Wi-Fi 5	Wi-Fi 5
Ethernet
Ethernet	No	Yes
Voice remote
Voice remote	Yes	Yes
Ports
Ports	HDMI output, Micro-USB, IR extender and power connections; no built-in Ethernet socket. The included Amazon Ethernet Adapter supplies 10/100 Ethernet through USB.	HDMI, USB, Ethernet and power input (model-4800 Quick Start Guide); no microSD slot (both reviews)
Wi-Fi and Bluetooth
Wi-Fi and Bluetooth	Dual-band 802.11a/b/g/n/ac with 2 × 2 MIMO; Bluetooth 5.0	Dual-band 802.11ac (TechRadar); Bluetooth support and up to 50% greater wireless range than the prior model (Roku's launch claim)
Smart home
Smart home	Eight far-field microphones and beamforming; Local Voice Control processes common navigation commands on the device. Alexa controls compatible equipment through infrared, HDMI CEC and supported cloud protocols.	Controllable through compatible Amazon Alexa and Google Assistant devices; AirPlay 2 and HomeKit support with updated software
Remote
Remote	Alexa Voice Remote (2nd Gen); 38 × 142 × 16 mm, 43.4 g without batteries; two AAA batteries included	Original voice remote has TV power, volume and mute, headphone jack, two personal shortcuts and lost-remote finder; two AA batteries. Later rechargeable-remote bundles are not separate player hardware here
Design
Type
Type	Box	Box
Power
Power	External power adapter	Supplied mains power adaptor
Size
Size	86.1 × 86.1 × 76.9 mm; 465 g	4.9 × 4.9 × 0.9 in (Tom's Guide)
In the box
In the box	Fire TV Cube, Alexa Voice Remote (2nd Gen), power adapter, two AAA batteries, IR extender cable, Amazon Ethernet Adapter and guides; HDMI cable sold separately	Ultra player, voice remote, headphones, two AA batteries, Premium High Speed HDMI cable and power adaptor