This is a report for professionals with a suite of test of headphone amplifier.
You can see a simple report for "dummies" with explanations of the main characteristics for Schiit Fulla 813 Hz THD

A suite of tests for a headphone amplifier can be applied to just a universal output without a formal presence of an amplifier, if in this mode you can connect headphones to this output. Based on the results of the tests, you can understand the real picture, is the output powerful enough or not, with the initial data on the circuitry as a "black box".

Line-out, differences from the output for headphones and speakers

Advantages and disadvantages of balanced amplifiers

Test report - general data Schiit Fulla (as headphone amplifier)

Frequency response, Impedance and Frequency response with standard headphones

Average value of impedance band in 40 Hz - 15 kHz

0.0

ohm

Brief information

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THD vs load vs output voltage Schiit Fulla 813 Hz THD

Graphics setting view

Channel

Load

Harmonic, number

Graphics setting view

Channel

Load

Harmonic, number

Graphics setting view

Channel

Load

Brief information

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Maximum voltage output level vs load Schiit Fulla 813 Hz THD

Graphics setting view

Type of chart

RAW coordinates

Power characteristics of the	Voltage		Current
	dBV	V_RMS	dB(mA)	mA
Equivalent class A	0.0	1.0	0.0	1.0
Equivalent class AB	0.0	1.0	0.0	1.0
Equivalent class B	0.0	1.0	0.0	1.0
Maximum mode	0.0	1.0	0.0	1.0

Volume Control Type	Analog
Optimal range of volume control	36.0	dB

Comparison Schiit Fulla 813 Hz THD and another amplifiers by loudness (Volume Level)

Main characteristics of the Schiit Fulla 813 Hz THD

Brief information

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Maximum voltage output level vs load Schiit Fulla 813 Hz THD

Graphics setting view

Type of chart

RAW coordinates

Maximum Amplifier Voltage Level

Load	Pure or equal class A		Optimal or equal class AB		Hard or equal class B		Max, before clipping
	dBV	V_RMS	dBV	V_RMS	dBV	V_RMS	dBV	V_RMS
15.8 ohm	-22.9	0.1	-18.9	0.1	-2.9	0.1	-0.9	0.1
24.5 ohm	-21.1	0.1	-14.4	0.1	0.9	0.1	3.2	0.1
30.5 ohm	-19.4	0.1	-12.7	0.1	2.6	0.1	3.6	0.1
62.4 ohm	-13.2	0.2	-13.2	0.2	7.1	0.2	7.1	0.2
100 ohm	-12.4	0.2	-12.4	0.2	7.9	0.2	7.9	0.2
198.9 ohm	-11.1	0.3	-11.1	0.3	7.9	0.3	7.9	0.3
300 ohm	-11.1	0.3	-11.1	0.3	9.2	0.3	9.2	0.3
763 ohm	-11.1	0.3	-11.1	0.3	9.2	0.3	9.2	0.3
Not loaded	-11.4	0.3	-11.4	0.3	5.9	0.3	5.9	0.3

Maximum level of amplifier current

Load	Pure or equal class A		Optimal or equal class AB		Hard or equal class B		Max, before clipping
	dB(mA)	mA	dB(mA)	mA	dB(mA)	mA	dB(mA)	mA
15.8 ohm	13.1	4.5	17.1	7.2	33.1	45.1	35.1	56.8
24.5 ohm	11.1	3.6	17.8	7.8	33.1	45.3	35.4	59.1
30.5 ohm	11.0	3.5	17.7	7.6	33.0	44.4	34.0	49.8
62.4 ohm	10.9	3.5	10.9	3.5	31.2	36.4	31.2	36.4
100 ohm	7.6	2.4	7.6	2.4	27.9	24.9	27.9	24.9
198.9 ohm	2.9	1.4	2.9	1.4	21.9	12.4	21.9	12.4
300 ohm	-0.6	0.9	-0.6	0.9	19.7	9.6	19.7	9.6
763 ohm	-8.7	0.4	-8.7	0.4	11.6	3.8	11.6	3.8

Power

Load	Pure or equal class A		Optimal or equal class AB		Hard or equal class B		Max, before clipping
	dBm	mW	dBm	mW	dBm	mW	dBm	mW
15.8 ohm	-4.9	0.3	-0.9	0.8	15.1	32.2	17.1	51.0
24.5 ohm	-5.0	0.3	1.7	1.5	17.0	50.3	19.3	85.4
30.5 ohm	-4.2	0.4	2.5	1.8	17.8	60.2	18.8	75.8
62.4 ohm	-1.1	0.8	-1.1	0.8	19.2	82.9	19.2	82.9
100 ohm	-2.4	0.6	-2.4	0.6	17.9	62.2	17.9	62.2
198.9 ohm	-4.1	0.4	-4.1	0.4	14.9	30.8	14.9	30.8
300 ohm	-5.8	0.3	-5.8	0.3	14.5	27.9	14.5	27.9
763 ohm	-9.9	0.1	-9.9	0.1	10.4	11.0	10.4	11.0

Brief information

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Spectrum of Total Harmonic Distortion vs Level Schiit Fulla 813 Hz THD (as headphone amplifier)

Graphics setting view

Channel

Level

Range

Graphics setting view

Channel

Level

Range

Graphics setting view

Channel

Shift

dBm

Range

Graphics setting view

Channel

Shift

dBV

Range

Brief information

Clicking on the graph will take you to the comparison page of different models with advanced graph display settings.

More detailed

Measurements of Schiit Fulla 813 Hz THD were carried out by Roman Kuznetsov on the hardware-software complex RAA.

The Schiit Fulla 813 Hz THD test was conducted as a black box test, without regard to cost and prestige. This is the basic principle for making measurements, measurement reports and developing tests in RAA.

Kuznetsov Roman
Founder of RAA

Known by the nickname romanrex
Аuthor of articles iXBT.com

Information for Authors. You can freely use the graphics in your articles with a link to us.

Schiit Fulla is available in reports and services. You are in a professional report.

Information for entry level users

reports for a newbie (Headphone amplifier)

The automatic selection of the optimal AMP models

Information for all

Versus of characteristics

Information for professionals

reports for a pro (Headphone amplifier)

reports for a pro (DAC Line Out)

DAC Line Out

Comparison of on-line graphs

Quick jump to the schedule in this report: 813 Hz THD

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