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 McIntosh MHA150 High Gain 8-40 Ohm

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 McIntosh MHA150 (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	2.4	ohm
Voltage: Linear Mode / Maximum or before clipping level	11.0/11.0	dBV
	3.6/3.6	V_RMS
Current: Linear Mode / Maximum or before clipping level	45.8/45.8	dB(mA)
	194.2/194.2	mA

Brief information

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Frequency response McIntosh MHA150 High Gain 8-40 Ohm (as headphone amplifier)

Graphics setting view

Channel

Range

Channel:	Left	Right
Variation in frequency response in band from 40 Hz - 15 kHz	-0.1, +0.0	-0.1, +0.0	dB

Brief information

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

Impedance McIntosh MHA150 High Gain 8-40 Ohm (as headphone amplifier)

Graphics setting view

Channel

Channel:	Left	Right
Impedance average in band from 40 Hz - 15 kHz	2.2	2.5	ohm
The minimum value in band from 40 Hz - 15 kHz	2.2	2.5	ohm
The maximum value in band from 40 Hz - 15 kHz	2.6	2.7	ohm

Comparison of basic characteristics AMPs

Brief information

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Crosstalk McIntosh MHA150 High Gain 8-40 Ohm (as headphone amplifier)

Graphics setting view

Channel

Range

Load

Channel:	Left	Right
Crosstalk @ 1 kHz @ 15.8 ohm	-64.8	-64.8	dB
Crosstalk @ 1 kHz @ 24.5 ohm	-68.4	-68.4	dB
Crosstalk @ 1 kHz @ 30.5 ohm	-70.6	-70.4	dB
Crosstalk @ 1 kHz @ 62.4 ohm	-77.6	-76.9	dB
Crosstalk @ 1 kHz @ 100.0 ohm	-83.4	-82.5	dB
Crosstalk @ 1 kHz @ 198.9 ohm	-91.6	-91.6	dB
Crosstalk @ 1 kHz @ 300.0 ohm	-100.3	-97.3	dB
Crosstalk @ 1 kHz @ 763.0 ohm	-93.1	-95.4	dB
Crosstalk @ 1 kHz @ Not loaded	-90.4	-89.9	dB

Brief information

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Crosstalk Phase McIntosh MHA150 High Gain 8-40 Ohm (as headphone amplifier)

Graphics setting view

Channel

Load

Brief information

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Frequency response McIntosh MHA150 High Gain 8-40 Ohm with resistive load

Graphics setting view

Channel

Range

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

Channel:	Left	Right
TEST 16 ? + McIntosh MHA150 High Gain 8-40 Ohm	0.3	0.2	dB
TEST 32 ? + McIntosh MHA150 High Gain 8-40 Ohm	0.1	0.1	dB
TEST 64 ? + McIntosh MHA150 High Gain 8-40 Ohm	0.1	0.1	dB
TEST 126 ? + McIntosh MHA150 High Gain 8-40 Ohm	0.0	0.0	dB
TEST 256 ? + McIntosh MHA150 High Gain 8-40 Ohm	0.0	0.0	dB
TEST 512 ? + McIntosh MHA150 High Gain 8-40 Ohm	0.0	0.0	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 McIntosh MHA150 High Gain 8-40 Ohm 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 ? + McIntosh MHA150 High Gain 8-40 Ohm	0.0	0.0	dB
Grado GH4 Limited Edition + McIntosh MHA150 High Gain 8-40 Ohm	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 McIntosh MHA150 High Gain 8-40 Ohm 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 ? + McIntosh MHA150 High Gain 8-40 Ohm	0.0	0.0	dB
Campfire Audio Andromeda + McIntosh MHA150 High Gain 8-40 Ohm	3.4	3.5	dB
Fearless Audio S8F Freedom + McIntosh MHA150 High Gain 8-40 Ohm	2.9	2.8	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 McIntosh MHA150 High Gain 8-40 Ohm

Graphics setting view

Channel

Load

Harmonic, number

Graphics setting view

Channel

Load

Harmonic, number

Graphics setting view

Channel

Load

Brief information

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

Maximum voltage output level vs load McIntosh MHA150 High Gain 8-40 Ohm

Graphics setting view

Type of chart

RAW coordinates

Power characteristics of the	Voltage		Current
	dBV	V_RMS	dB(mA)	mA
Equivalent class A	11.0	3.6	45.8	194.2
Equivalent class AB	11.0	3.6	45.8	194.2
Equivalent class B	11.0	3.6	45.8	194.2
Maximum mode	11.0	3.6	45.8	194.2

Volume Control Type	Discrete Analog
Optimal range of volume control	56.0	dB

Comparison McIntosh MHA150 High Gain 8-40 Ohm and another amplifiers by loudness (Volume Level)

Main characteristics of the McIntosh MHA150 High Gain 8-40 Ohm

Brief information

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Maximum voltage output level vs load McIntosh MHA150 High Gain 8-40 Ohm

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	9.8	3.1	9.8	3.1	9.8	3.1	9.8	3.1
24.5 ohm	10.2	3.2	10.2	3.2	10.2	3.2	10.2	3.2
30.5 ohm	10.3	3.3	10.3	3.3	10.3	3.3	10.3	3.3
62.4 ohm	10.7	3.4	10.7	3.4	10.7	3.4	10.7	3.4
100 ohm	10.8	3.5	10.8	3.5	10.8	3.5	10.8	3.5
198.9 ohm	10.9	3.5	10.9	3.5	10.9	3.5	10.9	3.5
300 ohm	11.0	3.5	11.0	3.5	11.0	3.5	11.0	3.5
763 ohm	11.0	3.5	11.0	3.5	11.0	3.5	11.0	3.5
Not loaded	11.0	3.6	11.0	3.6	11.0	3.6	11.0	3.6

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	45.8	194.5	45.8	194.5	45.8	194.5	45.8	194.5
24.5 ohm	42.4	131.5	42.4	131.5	42.4	131.5	42.4	131.5
30.5 ohm	40.7	107.8	40.7	107.8	40.7	107.8	40.7	107.8
62.4 ohm	34.8	54.8	34.8	54.8	34.8	54.8	34.8	54.8
100 ohm	30.8	34.7	30.8	34.7	30.8	34.7	30.8	34.7
198.9 ohm	24.9	17.7	24.9	17.7	24.9	17.7	24.9	17.7
300 ohm	21.4	11.8	21.4	11.8	21.4	11.8	21.4	11.8
763 ohm	13.3	4.7	13.3	4.7	13.3	4.7	13.3	4.7

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	27.8	597.6	27.8	597.6	27.8	597.6	27.8	597.6
24.5 ohm	26.3	423.7	26.3	423.7	26.3	423.7	26.3	423.7
30.5 ohm	25.5	354.4	25.5	354.4	25.5	354.4	25.5	354.4
62.4 ohm	22.7	187.6	22.7	187.6	22.7	187.6	22.7	187.6
100 ohm	20.8	120.6	20.8	120.6	20.8	120.6	20.8	120.6
198.9 ohm	17.9	62.1	17.9	62.1	17.9	62.1	17.9	62.1
300 ohm	16.2	41.5	16.2	41.5	16.2	41.5	16.2	41.5
763 ohm	12.2	16.5	12.2	16.5	12.2	16.5	12.2	16.5

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 McIntosh MHA150 High Gain 8-40 Ohm (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.

Spectrum of Multitone Distortion vs Level vs Load McIntosh MHA150 High Gain 8-40 Ohm (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.

Spectrum of IMD SMPTE vs Level McIntosh MHA150 High Gain 8-40 Ohm (as headphone amplifier)

Graphics setting view

Channel

Level

Range

Range

Graphics setting view

Channel

Level

Range

Range

Graphics setting view

Channel

Shift

Range

dBm

Range

Graphics setting view

Channel

Shift

Range

dBV

Range

Brief information

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

Spectrum of IMD CCIF vs Level McIntosh MHA150 High Gain 8-40 Ohm (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 McIntosh MHA150 High Gain 8-40 Ohm were carried out by Roman Kuznetsov on the hardware-software complex RAA.

The McIntosh MHA150 High Gain 8-40 Ohm 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.

McIntosh MHA150 was given for tests by Personal Audio

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.

McIntosh MHA150 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: High Gain 8-40 Ohm

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Comments

romanrex
Изображения, медиа и смайлы доступны в исходном чате.
2020-08-22 02:49:02

Комментарий к профессиональному отчету McIntosh MHA150

Тесты с использованием импульса отсутствуют из-за неотключаемого auto-fade. Такой сигнал воспроизвести просто невозможно, а подмешивание шума в 1 бит недостаточно. При шуме более высокой амплитуды уже результаты теста получаются шумными.

Для музыки эта система определения тишины проблемы не несет, а вот с измерениями, пришлось повозится с модификацией сигналов.

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