Comparison OPPO HA-2 SE vs OPPO HA-2

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	OPPO HA-2 SE	OPPO HA-2
	Outdated Product	from $332.31 up to $430.92 Outdated Product
all specs only differences
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Type	portable	portable
DAC	ESS Sabre32 Reference ES9028-Q2M	Sabre ES9018-K2M
Specs
DAC sample rate	384 kHz	384 kHz
DAC bit depth	32 bit	32 bit
Headphone impedance	16 – 300 Ohm	16 – 300 Ohm
Power (300 Ohm)	30 mW	30 mW
Power (32 Ohm)	220 mW	220 mW
Power (16 ohm)	300 mW	300 mW
Frequency range	20 – 200000 Hz	20 – 200000 Hz
Functions
IPhone/iPad connection
Gain Control
Bass control	/Bass Boost/	/Bass Boost/
Level adjustment	wheel	wheel
Connectors
Inputs	mini-Jack (3.5 mm) /combined with exit/ USB (OTG) USB (Type B)	mini-Jack (3.5 mm) USB (OTG) USB (Type B)
Outputs	mini-Jack (3.5 mm) /combined with entrance/	mini-Jack (3.5 mm)
Headphone outputs	mini-Jack (3.5 mm) 1 шт	mini-Jack (3.5 mm) 1 шт
Power source
Power type	battery powered /Li-Pol, 3000 mAh/ USB powered power bank mode	battery powered /Li-Pol, 3000 mAh/ USB powered power bank mode
Battery life	13 h	13 h
General
Metal body
Dimensions	68x137x12 mm	68x137x12 mm
Weight	175 g	175 g
Added to E-Catalog	december 2017	august 2015

DAC

DAC model — a digital-to-analogue converter installed in the amplifier.

In accordance with the name, the DAC is responsible for converting a digital signal (for example, coming to the optical input or USB, see "Inputs") into an analogue format, with which the amplifier directly works. The presence of such a converter in an external "amplifier" is important, given the fact that many popular signal sources — such as smartphones or built-in sound cards — are equipped with fairly simple and inexpensive DACs with low sound quality; on external equipment, this quality can be much higher. And the quality of the conversion and, accordingly, the characteristics of the output sound directly depend on the characteristics of the DAC: even the most advanced power amplifier will not “save” a signal converted with significant errors. Accordingly, knowing the converter model, you can find detailed data on it — from official specifications to practical reviews — and evaluate how an amplifier with such a module meets your requirements.