Blessing 2 Dusk vs HARMON: which needs more amplifier?

The Moondrop Blessing 2 Dusk is 22Ω at 106.0 dB (no figure from the maker at all); the Moondrop HARMON is 19Ω at 96.8 dB/mW. This page covers what they ask of an amplifier, not how they sound.

The HARMON needs 9.2 dB more than the Blessing 2 Dusk to reach the same loudness — 2.1 mW against 0.25 mW.

Side by side

The numbers that decide it

Specification	Blessing 2 Dusk	HARMON
Impedance	22 Ω	19 Ω
Sensitivity	106.0 dB	96.8 dB/mW
Sensitivity (voltage)	122.6 dB/V	114.0 dB/V
Power for 100 dB	0.25 mW	2.1 mW
Voltage for 100 dB	74 mV	0.20 V
Current for 100 dB	3.4 mA	10.5 mA
Highest source impedance that leaves them alone (one-eighth rule)	2.75 Ω	2.38 Ω
Sources that reach 100 dB out of 280	280	280

One caution before reading the rows. For Moondrop Blessing 2 Dusk the maker publishes no sensitivity figure at all. The number in the table was collected when this database was first built and has never been traced to a manufacturer document, so treat every row below it as an estimate rather than a specification.

What separates them

Where the two part company

Every source in the database that drives one of them drives the other. On power, the choice between these two changes nothing about what amplifier you need.

2 sources stay below the audible-hiss threshold with the HARMON but cross it with the Blessing 2 Dusk (FiiO BTR11, Rupert Neve RNHP).

280 of the 280 sources here reach 100 dB on both.

At the level you actually listen at

What each one needs from 80 to 105 dB

The HARMON is more demanding than 58% of the 567 non-electrostatic models in this database; the Blessing 2 Dusk than 23%.

dB SPL	Blessing 2 Dusk power	Blessing 2 Dusk voltage	HARMON power	HARMON voltage
80	2.5 µW	7 mV	0.02 mW	20 mV
85	7.9 µW	13 mV	0.07 mW	35 mV
90	0.03 mW	24 mV	0.21 mW	63 mV
95	0.08 mW	42 mV	0.66 mW	0.11 V
100	0.25 mW	74 mV	2.1 mW	0.20 V
105	0.79 mW	0.13 V	6.6 mW	0.35 V

What drives both

The cheapest source that satisfies both

Source	Price	Headroom, Blessing 2 Dusk	Headroom, HARMON	Output impedance	Noise
JadeAudio JA11	$20	19.1 dB	9.3 dB	0.5 Ω	1.7 µV
FiiO KA11	$29	29.4 dB	20.4 dB	0.7 Ω	1.7 µV
FiiO BTR13	$59	26.3 dB	17.3 dB	0.6 Ω	1.0 µV

Of the 280 sources here, 280 reach 100 dB on both. 67 of them also publish an output impedance low enough for both under the one-eighth rule and a noise figure that stays below the audible-hiss threshold with both.

The cheapest of the 67 is the JadeAudio JA11, at $20. It leaves 19.1 dB of headroom on the Blessing 2 Dusk and 9.3 dB on the HARMON, its output impedance is 0.5 Ω against a one-eighth limit of 2.75 Ω and 2.38 Ω, and its noise figure puts the hiss floor 13 dB and 21 dB below the 20 dB SPL this site treats as the point where a quiet room stops hiding it.

Try any other source.

Both pages in full

Both have a page of their own. In full: Moondrop Blessing 2 Dusk and Moondrop HARMON. Each figure on this page is labelled on those pages with where it came from, including the ones Moondrop never published — what that maker publishes, counted.