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 Laconic Lunch BOX HA-06 PRO Hi Gain

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 Laconic Lunch BOX HA-06 PRO (as headphone amplifier)

Frequency response, Impedance and Frequency response with standard headphones

Voltage levels from the load at the output of the amplifier

Average value of impedance band in 40 Hz - 15 kHz	55.3	ohm
Voltage: Linear Mode / Maximum or before clipping level	11.5/26.5	dBV
	3.8/21.1	V_RMS
Current: Linear Mode / Maximum or before clipping level	18.2/23.4	dB(mA)
	8.1/14.9	mA

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Frequency response Laconic Lunch BOX HA-06 PRO Hi Gain (as headphone amplifier)

Graphics setting view

Channel

Range

Channel:	Left	Right
Variation in frequency response in band from 40 Hz - 15 kHz	-2.7, +2.5	-2.7, +4.4	dB

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On the frequency response comparison page, there is an export option and additional tools for adjusting the frequency response

Impedance Laconic Lunch BOX HA-06 PRO Hi Gain (as headphone amplifier)

Graphics setting view

Channel

Channel:	Left	Right
Impedance average in band from 40 Hz - 15 kHz	55.8	54.8	ohm
The minimum value in band from 40 Hz - 15 kHz	38.7	37.8	ohm
The maximum value in band from 40 Hz - 15 kHz	82.6	81.7	ohm

Comparison of basic characteristics AMPs

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Frequency response Laconic Lunch BOX HA-06 PRO Hi Gain with resistive load

Graphics setting view

Channel

Range

Frequency response of amplifier with resistive load @ 40 Hz - 15 kHz

Channel:	Left	Right
TEST 16 ? + Laconic Lunch BOX HA-06 PRO Hi Gain	4.0	4.0	dB
TEST 32 ? + Laconic Lunch BOX HA-06 PRO Hi Gain	3.1	3.1	dB
TEST 64 ? + Laconic Lunch BOX HA-06 PRO Hi Gain	2.1	2.1	dB
TEST 126 ? + Laconic Lunch BOX HA-06 PRO Hi Gain	1.3	1.3	dB
TEST 256 ? + Laconic Lunch BOX HA-06 PRO Hi Gain	0.8	0.7	dB
TEST 512 ? + Laconic Lunch BOX HA-06 PRO Hi Gain	0.4	0.4	dB

Brief information

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

On the frequency response comparison page, there is an export option and additional tools for adjusting the frequency response

Frequency response Laconic Lunch BOX HA-06 PRO Hi Gain loaded dynamic headphone type

Graphics setting view

Channel

Range

Frequency response of amplifier loaded dynamic headphone type @ 40 Hz - 15 kHz

Channel:	Left	Right
TEST 10000 ? + Laconic Lunch BOX HA-06 PRO Hi Gain	0.0	0.0	dB
Grado GH4 Limited Edition + Laconic Lunch BOX HA-06 PRO Hi Gain	3.8	4.0	dB

Brief information

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

On the frequency response comparison page, there is an export option and additional tools for adjusting the frequency response

Frequency response Laconic Lunch BOX HA-06 PRO Hi Gain loaded type balance armature headphone type

Graphics setting view

Channel

Range

Frequency response of amplifier loaded type balance armature headphone type @ 40 Hz - 15 kHz

Channel:	Left	Right
TEST 10000 ? + Laconic Lunch BOX HA-06 PRO Hi Gain	0.0	0.0	dB
Campfire Audio Andromeda + Laconic Lunch BOX HA-06 PRO Hi Gain	17.5	17.4	dB
Fearless Audio S8F Freedom + Laconic Lunch BOX HA-06 PRO Hi Gain	10.8	10.7	dB

Brief information

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

On the frequency response comparison page, there is an export option and additional tools for adjusting the frequency response

THD vs load vs output voltage Laconic Lunch BOX HA-06 PRO Hi Gain

Graphics setting view

Channel

Load

Harmonic, number

Graphics setting view

Channel

Load

Harmonic, number

Graphics setting view

Channel

Load

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Maximum voltage output level vs load Laconic Lunch BOX HA-06 PRO Hi Gain

Graphics setting view

Type of chart

RAW coordinates

Power characteristics of the	Voltage		Current
	dBV	V_RMS	dB(mA)	mA
Equivalent class A	11.5	3.8	18.2	8.1
Equivalent class AB	26.5	21.1	20.8	10.9
Equivalent class B	26.5	21.1	22.7	13.7
Maximum mode	26.5	21.1	23.4	14.9

Volume Control Type	Analog
Optimal range of volume control	56.0	dB

Comparison Laconic Lunch BOX HA-06 PRO Hi Gain and another amplifiers by loudness (Volume Level)

Main characteristics of the Laconic Lunch BOX HA-06 PRO Hi Gain

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Maximum voltage output level vs load Laconic Lunch BOX HA-06 PRO Hi Gain

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	-16.5	0.1	-15.6	0.1	-12.9	0.1	-12.9	0.1
24.5 ohm	-13.1	0.2	-11.2	0.2	-9.4	0.2	-8.6	0.2
30.5 ohm	-13.2	0.2	-8.5	0.2	-6.0	0.2	-5.3	0.2
62.4 ohm	-5.1	0.6	-3.2	0.6	-1.4	0.6	-0.5	0.6
100 ohm	-1.3	0.9	1.6	0.9	3.4	0.9	4.2	0.9
198.9 ohm	4.9	1.7	7.8	1.7	8.7	1.7	9.6	1.7
300 ohm	8.8	2.7	11.7	2.7	12.7	2.7	13.6	2.7
763 ohm	11.9	3.9	19.8	3.9	19.8	3.9	20.7	3.9
Not loaded	11.5	3.8	26.5	3.8	26.5	3.8	26.5	3.8

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	19.5	9.5	20.5	10.6	23.1	14.3	23.1	14.3
24.5 ohm	19.1	9.0	21.0	11.2	22.8	13.8	23.6	15.1
30.5 ohm	17.1	7.2	21.9	12.4	24.3	16.4	25.0	17.8
62.4 ohm	19.0	8.9	20.9	11.1	22.7	13.7	23.6	15.1
100 ohm	18.7	8.6	21.6	12.0	23.4	14.8	24.2	16.3
198.9 ohm	18.9	8.8	21.8	12.3	22.7	13.7	23.6	15.2
300 ohm	19.2	9.2	22.2	12.8	23.1	14.3	24.0	15.9
763 ohm	14.2	5.1	22.1	12.8	22.1	12.8	23.0	14.1

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	1.5	1.4	2.5	1.8	5.1	3.2	5.1	3.2
24.5 ohm	3.0	2.0	4.9	3.1	6.7	4.6	7.5	5.6
30.5 ohm	2.0	1.6	6.7	4.7	9.2	8.2	9.8	9.6
62.4 ohm	6.9	4.9	8.8	7.6	10.7	11.7	11.5	14.2
100 ohm	8.7	7.4	11.6	14.4	13.4	21.9	14.2	26.6
198.9 ohm	11.9	15.4	14.8	30.2	15.7	37.5	16.6	46.1
300 ohm	14.0	25.2	16.9	49.5	17.9	61.5	18.8	75.6
763 ohm	13.1	20.2	20.9	124.1	20.9	124.1	21.8	152.3

Brief information

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

Spectrum of Total Harmonic Distortion vs Level Laconic Lunch BOX HA-06 PRO Hi Gain (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 Laconic Lunch BOX HA-06 PRO Hi Gain were carried out by Roman Kuznetsov on the hardware-software complex RAA.

The Laconic Lunch BOX HA-06 PRO Hi Gain 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.

I believe that it is important to do not make an absolute assessment of the device, but an aggregate assessment when working together with a headphones and taking into account external factors. This allows you to effectively reveal the potential of the entire set of devices or to make a more optimal choice of components.

Kuznetsov Roman
Founder of RAA

Known by the nickname romanrex
Аuthor of articles iXBT.com

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