Portable headphone amplifiers

Connector (left): 3.5mm jack female, USB-C

Connector (right): 3.5mm jack female, USB-C

Brand: ddHiFi

Brand: Earmen

Headphone output: 4.4mm jack, 3.5mm jack

Output connectors: 3.5mm jack, 4.4mm jack

Brand: Earmen

Headphone output: 3.5mm jack, 4.4mm jack

Power output: 0.280

Brand: Cayin

Headphone output: 4.4mm jack, 3.5mm jack

Power output: 0.213, 0.138

Brand: iFi

Headphone output: 4.4mm jack, 3.5mm jack

Output connectors: 4.4mm jack, 3.5mm jack

Conductor material: copper

Connector (left): USB-C, 4.4mm jack male

Connector (right): USB-C, 4.4mm jack male

Braid material: fabric

Cable length, m: 0.9

Cable type: straight

Conductor material: copper

Connector (left): USB-C, 3.5mm jack female

Connector (right): USB-C, 3.5mm jack female

Cable length, m: 0.1

Connector (left): 3.5mm jack female, USB-C

Connector (right): 3.5mm jack female, USB-C

Brand: Hidizs

Headphone output: 4.4, 3.5

Output connectors: 4.4, 3.5

Brand: Hidizs

Headphone output: 3.5

Output connectors: 3.5

Brand: iFi

Headphone output: 4.4, 6.3

Output connectors: RCA, 4.4

Brand: Cayin

Headphone output: 4.4mm jack, 3.5mm jack

DAC chip: R2R

Cable length, m: 0.1

Conductor material: copper

Connector (left): 3.5mm jack female, Lightning

Brand: Cayin

Headphone output: 3.5, 4.4

Output connectors: 3.5, 4.4

Braid material: nylon

Cable length, m: 0.1

Cable type: straight

Cable length, m: 0.1

Cable type: straight

Connector (left): 3.5mm jack female, Lightning

Conductor material: copper

Connector (left): Lightning, 4.4mm jack male

Connector (right): Lightning, 4.4mm jack male

Cable type: straight

Connector (left): USB-C, 4.4mm jack male

Connector (right): USB-C, 4.4mm jack male

Brand: ddHiFi

Headphone output: 4.4mm jack

Output connectors: 4.4mm jack

Conductor material: copper

Connector (left): 3.5mm jack female, Lightning

Connector (right): 3.5mm jack female, Lightning

Brand: Hidizs

Headphone output: 2.5, 3.5

Output connectors: usb-C

Cable length, m: 0.18

Conductor material: copper

Connector (left): 3.5mm jack female, USB-C

Brand: Shanling

Headphone output: 3.5mm jack, 4.4mm jack

Output connectors: Coaxial

Brand: Chord

Headphone output: 3.5mm jack

Power output: 0.6

Conductor material: copper

Connector (left): 3.5mm jack female, Lightning

Connector (right): 3.5mm jack female, Lightning

Circuit design: discrete

Form factor: portable

Power output: 3.8

Brand: Cayin

Headphone output: 4.4mm jack, 3.5mm jack

Output connectors: 4.4mm jack, 3.5mm jack

Brand: Hidizs

Headphone output: 2.5mm jack, 3.5mm jack

Output connectors: 2.5mm jack, 3.5mm jack

Brand: iFi

Powered by USB: yes

The lowest frequency, Hz: 20