## Test report - general data of Xuelin iHiFi 770 Out 1 as AMP mode

## General results

General results

Xuelin iHiFi 770 Out 1

Xuelin iHiFi 770 Out 1

Channel

Center/Summary

Average variation in FR in the band 40 Hz to 15 kHz, dB

-0,31, 0,01

Average value of impedance band in 40 Hz to 15 kHz, ohm

10,4

Max voltage output

V

_{RMS}dBV

Clear or equal class A

^{F.A.Q.}0,40

-8,01

Optimal or equal class AB

^{F.A.Q.}0,63

-4,01

Hard or equal class B

^{F.A.Q.}1,12

0,99

Max, before clipping

^{F.A.Q.}1,12

0,99

Maximum current output at loaded

ohm

mA

Clear or equal class A

^{F.A.Q.}30,5

0,87

Optimal or equal class AB

^{F.A.Q.}30,5

1,55

Hard or equal class B

^{F.A.Q.}30,5

3,47

Max, before clipping

^{F.A.Q.}30,5

24,42

Max power output

ohm

mW

dBm

Clear or equal class A

^{F.A.Q.}763,0

0,10

-9,95

Optimal or equal class AB

^{F.A.Q.}300,0

0,25

-6,07

Hard or equal class B

^{F.A.Q.}300,0

1,96

2,93

Max, before clipping

^{F.A.Q.}30,5

18,19

12,60

The table shows a most important technical characteristics of Xuelin iHiFi 770 Out 1

*Center channel is received by data averaging between the left and right channels

## Test conditions

- For record of test signals RAA was used ADC: E-MU 1616m
- The difference between maximum levels output unloaded Xuelin iHiFi 770 Out 1 and input level 0 dBFS E-MU1616m is -16,79 dB (value level for left and right channels)
- During tests RAA software-hardware measuring complex was used galvanic isolated power transformer and was excluded the effect of ground loop in the spectra

## Detailed measurements report of technical characteristics

#### Report content

- Frequency response
- Frequency response with loaded resistors
- | Variation in frequency response dependence of load dynamic type headphones
- Frequency response vs load balance armature headphone type (one driver) | Variation in frequency response vs load balance armature headphone type (one driver)
- Impedance
- Maximum level:
**voltage from the musical power for the amplifier output**- voltage output level vs load of sine
- current output level vs load of sine
- power output level vs load of sine
- THD vs load vs output voltage

## Brief information

## Table of measured characteristics

Recommended impedances for headphones for Xuelin iHiFi 770 Out 1

Recommended impedance for headphones from the range

8 - 1008 Ом для режима работы усилителя

8 - 1008 Ом для режима работы усилителя

Equivalent class A

^{F.A.Q.}Max, before clipping

^{F.A.Q.}For In-Ear Headphones

No recommendation, Amp is too quiet

8 - 233 ohm

For Over-Ear Headphones

No recommendation, Amp is too quiet

No recommendation, Amp is too quiet

## Table of measured characteristics

Xuelin iHiFi 770 Out 1

Output Impedance

10.40 ohm

Power characteristics of the

Voltage

Current

Equivalent class A

^{F.A.Q.}0.40 V

-8.01 dBV

_{RMS}-8.01 dBV

0.52 mA

-5.66 dB(mA)

-5.66 dB(mA)

Equivalent class AB

^{F.A.Q.}0.63 V

-4.01 dBV

_{RMS}-4.01 dBV

1.24 mA

1.87 dB(mA)

1.87 dB(mA)

Equivalent class B

^{F.A.Q.}1.12 V

0.99 dBV

_{RMS}0.99 dBV

2.77 mA

8.86 dB(mA)

8.86 dB(mA)

Maximum mode

^{F.A.Q.}1.12 V

0.99 dBV

_{RMS}0.99 dBV

21.17 mA

26.51 dB(mA)

26.51 dB(mA)

## On-line comparison and selection services for Xuelin iHiFi 770 Out 1

Comparison of basic characteristics Xuelin iHiFi 770 Out 1 versus other models.

Voltage, Current and Impedance

Voltage, Current and Impedance

Comparison of the power characteristics of Xuelin iHiFi 770 Out 1 and interaction headphones.

Additional headphone compatibility analytics.

Additional headphone compatibility analytics.

The automatic selection of the optimal AMP models from Xuelin iHiFi 770 Out 1.

from the measured power parameters of the amplifying part and the measured parameters of the headphones for different purpose of use.

from the measured power parameters of the amplifying part and the measured parameters of the headphones for different purpose of use.