QXA1, Entry Level Fully Balanced HPA & PRE-AMP

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1. 190 mW@SE; 700 mv@BAL(300Ω)
2. Ultra-low Noise Linear Regulators and Isolations
3. Multi-function Knob Button
4. Excellent Electronic Volume Control
5. Memory Function and Fade In Fade Out
6. Software-controlled Pop Free
$269.99
Model：QXA1
Dimensions：149.3mm(W) * 87mm(D) * 37mm(H)
Net Weight：550 g
Power Consumption：< 8W
Launch Date：2021-06-07
Made In：China
QXA1 Color
Black
Black
$269.99
Gray
Gray
$269.99
Silver
Silver
$269.99
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QXA1
Entry Level Fully Balanced Headphone Amplifier & Pre-Amplifier
Silver
Gray
Black

Multi-function Knob Button

One press: Mute
Long press for 3 seconds: Standby mode
Long press for 6 seconds: Reset the system
Rotate quickly: Adjust the volume quickly
One press +Rotate: Switch option and set input or output
Set the HPA balance output
Press the knob once and rotate it to “OUT”icon flashes;
press it and then rotate it to "BAL"icon flashes;
press it to confirm the HPA BAL output.
Menu level
QXA1 contains two levels of menu:
The first-level options: "V”,“G”"IN”,“OUT”,"PRE"
The second-level options:
V(Volume): Volume value digital display
G(Gain): Gain value digital display
IN(Analog inputs): RCA and XLR icons
OUT(Headphone outputs): SE and BAL icons
PRE(Pre-Amp outputs): RCA

Volume/Gain Adjustment

QXA1 integrates MUSES 72320 electronic volume chip which performs low noise and low distortion characteristics and with resistance ladder circuit.
Volume: 0.5dB/step in the range of -99.75dB ~ 0dB
0.25dB/step with gain(G)=0/6dB
Gain: 0.5dB/step in the range of 0dB ~ +12dB
Front Panel



QXA1-前面板(1)-2.jpg

1.   HPA 4-pin balanced output

2.   HPA 6.35mm single-ended(SE) output

3.   RCA analog input icon

4.   XLR analog input icon

5.   HPA 6.35mm SE output icon

6.    HPA 4-pin balanced output icon

7.    PRE RCA analog output icon

8.    Volume value icon

9.   Gain value icon

10.   Multi-function knob button

Rear Panel

QXA1后面板(1)-2.jpg

1.   XLR analog input

2.   RCA analog input

3.   PRE RCA analog output

4.   Power in: USB-C(5V@1.5A)

High Performance & Experience

Typical Applications
1. Headphone amplifier application
2. Preamp application
QXA1 Specifications
HPA performance

Dimensions

149.3mm(W) * 87mm(D) * 37mm(H)

Net Weight

550 g

Power Input

DC 5V 1.5A

Power Consumption

< 8W

Analog Inputs

XLR

RCA

HPA Output

SE

BAL

SE

BAL

THD+N @1kHz

< -116dB

< -117dB

< -116dB

< -117dB

Freq@20Hz ~ 20k Hz

± 0.1dB

± 0.1dB

± 0.1dB

± 0.1dB

DNR@1kHZ A-wt

< -122dB

< -124dB

< -122dB

< -124dB

SNR@50mV A-wt

< -92dB

< -91dB

< -92dB

< -91dB

Crosstalk @10kHz

< -118dB

< -120dB

< -118dB

< -120dB

Output Voltage V=0,G=0

2.0Vrms

4.0Vrms

2.0Vrms

4.0Vrms

Output Impedance

0.1Ω

0.05Ω

0.1Ω

0.05Ω

Noise

2.0μVrms

4.0μVrms

2.0μVrms

4.0μVrms

Output Power

33Ω

1550mW

550mW

1550mW

550mW

300Ω

190mW

700mW

190mW

700mW

600Ω

95mW

350mW

95mW

350mW

PRE performance

Analog Inputs

XLR

RCA

PRE Output

RCA

RCA

THD+N @1kHz

< -116dB

< -116dB

Freq@20Hz ~ 20k Hz

± 0.1dB

± 0.1dB

DNR@1kHZ A-wt

< -122dB

< -122dB

SNR@50mV A-wt

< -93dB

< -93dB

Crosstalk @10kHz

< -130dB

< -130dB

Output Voltage V=0,G=0

2.0Vrms

2.0Vrms

Output Impedance

100Ω

100Ω

Noise

2.0μVrms

2.0μVrms

Packaging List

FAQs

Q1: Can the PRE and HPA output at the same time?
A1: Yes.When the HPA is outputing,the PRE output can be enabled.
Q2: Howto adjust the volume quickly? A2: When the QXA1 detection knob is turned rapidly,it will automatically enter the mode of rapid volume adjustment, and when it is detected that the knob is turned slowly, it will enter the mode of fine adjustment.
Q3: Is the gain continuously adjustable? A3: Yes.Gain is adjusted by 0.5dB/step.
Q4: What is the power supply for QXA1? A4: The QXA1 can be powered by a linear power supplyla mobile power supply / an adapter with output specification of 5V@2A.
Q5: How to make QXA1 enter standby mode? A5: 1. Press the knob once and the QXA1 will be in silent mode,after 60 seconds, the screen will goes out and enters the standby mode. 2. Long press the knob for 3 seconds and then the screen goes off and directly enter the standby mode.
Q6: How to wake up QXA1 after entering standby mode? A6: Rotate or press the knob once to wake up the QXA1 screen,press it againto exit the silent mode.

Q7: How many MUSES 72320 chips does the QXA1 use?

A7: 1 chip.

 

Q8: What is the difference between the QXA1 and the SGA1?

A8: The QXA1 is a smaller version of the SGA1. The preamp output retains single-ended RCA output. The headphone output removes the balanced 4.4mm jack. The power supply method is also different. The QXA1, QXD1, and LPI form a matching set. The SGA1 and SGD1 form another set.

 

Q9: How is the QXA1 powered?

A9: The QXA1 requires 5V @ 1.5A. It can be powered by a linear power supply, power bank, or adapter with an output specification of 5V @ 2A. The SONCOZ LPI linear power supply is recommended.

Q10: Does QXA1 have matching products? A10: Yes.The stack is LP1+QXD1+QXA1.

E-mail：hello@soncoz.com