InLine 33055I headphone amplifier vs InLine Bass Boosting Dual Output Headpones Amplifier

Comparison of 33055I, 33057I

27 specifications	A InLine 33055I headphone amplifier Model 33055I View product	B InLine Bass Boosting Dual Output Headpones Amplifier Model 33057I View product
Audioidentical
Peak power per channelKnown for one	0.09 W	—Unknown — not stated by the source
Total Harmonic Distortion (THD)Known for one	0.05%	—Unknown — not stated by the source
Signal-to-Noise Ratio (SNR)	90 dB	90 dB
Audio D/A Converter (DAC)Known for one	24-bit/96kHz	—Unknown — not stated by the source
Output impedanceKnown for one	100 Ω	—Unknown — not stated by the source
Frequency rangeKnown for one	20 - 20000 Hz	—Unknown — not stated by the source
Adjustable volumeKnown for one	—Unknown — not stated by the source	Yes
Ports & interfacesidentical
Headphone connectivity	3.5mm	3.5mm
USB 2.0 ports quantityKnown for one	1	—Unknown — not stated by the source
Line-outKnown for one	—Unknown — not stated by the source	Yes
Audio (L/R) inKnown for one	—Unknown — not stated by the source	1
Technical detailsidentical
LED indicatorsKnown for one	Charging, Power	—Unknown — not stated by the source
Product colour	Black	Black
Package volumeKnown for one	—Unknown — not stated by the source	1000 cm³
Batteryidentical
Battery technologyKnown for one	Lithium Polymer (LiPo)	—Unknown — not stated by the source
Number of batteries supportedKnown for one	1	—Unknown — not stated by the source
Battery life	8 h	8 h
Charging timeKnown for one	1 h	—Unknown — not stated by the source
Battery capacityKnown for one	—Unknown — not stated by the source	200 mAh
Poweridentical
Power sourceKnown for one	Battery	—Unknown — not stated by the source
USB poweredKnown for one	Yes	—Unknown — not stated by the source
Packaging contentidentical
Cables includedKnown for one	Micro-USB	—Unknown — not stated by the source
Weight & dimensionsidentical
WeightKnown for one	—Unknown — not stated by the source	63 g
Package depthKnown for one	—Unknown — not stated by the source	178 mm
Package heightKnown for one	—Unknown — not stated by the source	40 mm
Package weightKnown for one	—Unknown — not stated by the source	125 g
Package widthKnown for one	—Unknown — not stated by the source	145 mm

A dash means the value is not stated by the source. Unknown values are never counted for or against a product, and there is no overall score.