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QX-4300 

USER MANUAL    

|   

09

QUESTAUDIO.NET

SPECIFICATIONS

MODEL

PER CHANNEL

LOAD

8Ohm

4Ohm

70V (22Ohm)

100V (33Ohm)

Maximum Dynamic Power 

(@1KHz, 1% THD)

4x 550W

4x 550W

4x 550W

4x 550W

Maximum Continuous Power 

(@1kHz, 1% THD)

4x 280W

4x 260W

4x 250W

4x 240W

Frequency Response

20-20kHz (+/-0.3dB)

Peak Output Current

25A

Dynamic Range

104dB (A-weighted)

Noise Level

-67dBu (A-weighted)

Distortion (1kHz@1W/8Ohm)

0.006%

Distortion (1kHz@50W/8Ohm)

0.006%

Crosstalk (1kHz@1W/8Ohm)

-80dB

Gain

32dB

Maximum Input Level

+24dBu

Input Type

Analogue Balanced 3-pin 

Phoenix (5.08mm pitch) + 

Optional Expansion Module

Input Sensitivity

+4dBu

Input Impedance

10kOhm

Output Resistance

43.6mOhm

Front Controls

Volume Adjust, 80Hz HPF 

Enable, 100Hz LPF Enable, 

Limiter Enable, Auto-Standby 

Enable

Indicators (LEDs)

Blue/Orange

Active/

Standby

Orange

Protection

Green

Signal 

Detection

Orange/Red

Limiter/Clip

Cooling

Fan cooled, temperature 

dependent

Features

Wake On Music, Auto-Mute 

(1ms wake-up), Limiting on 

 

High Temperature

Amplifier Protection Systems

Thermal protection, 

 

Over-Current Protection, 

 

DC Protection, HF Protection

Mains Input Voltage Range

85VAC - 265VAC

Standby Power Consumption

4.8W

Muted Power Consumption

16W

Idle Power Consumption

28W

Standard Power Consumption 

(Pink Noise@ 1/8th Rated 

Power, 8Ohm)

150W

Output Connector       

2-pin Phoenix (5.08mm pitch) 

with a screw lock

Mains Connector

Standard IEC C14

Dimensions (H x W x D)

44 x 482 x 344 mm 

 

(1.75 x 19 x 13.5”)

Weight

5.9kg (13 lbs)

Accessories

Mains Cable, Feet, User Manual, 

Phoenix Plugs

* All specifications were measured at 240VAC
** Quest Engineering reserves the right to make changes in 
specifications, or products without prior notice.
*** The figures shown above are ‘real world’, usable specifications and 
are conservative as a result. Quest Engineering does not believe in 
portraying misleading or exaggerated specifications.

Summary of Contents for QX-4300

Page 1: ...QX 4300 USER MANUAL 01 QUESTAUDIO NET QUESTAUDIO NET QX 4300 USERMANUAL ...

Page 2: ...applications the QX range of amplifiers provide superior class D performance with proven reliability without compromise SAFETY PRECAUTIONS Please read the instructions in this section carefully before use Ensure all instructions in this manual are observed as all information contained within is very important It is also highly recommended that this manual is retained for future reference SAFETY SY...

Page 3: ...he event of storms and or lightning ensure all devices are disconnected from mains power in order to prevent damage to any of the units in the system When cleaning the unit ensure it has been disconnected from any power source and that only a dry cloth is used Do not use any aerosol or liquid based cleaners Ensure all electronics are electronically grounded earthed to a safety ground terminal in o...

Page 4: ...is limiting signal or muted if in standby mode Red Amplifier is clipping HPF Off Amplifier passing full range signal On 80Hz High Pass Filter Active 24dB Oct LPF Off Amplifier passing full range signal On 100Hz Low Pass Filter Active 24dB Oct LIMIT Off Amplifier will not limit On Amplifier will limit to prevent clipping A STBY Off Amplifier will not enter power saving mode On Amplifier will enter ...

Page 5: ...5 QUESTAUDIO NET REAR PANEL CONNECTIONS CH1 Input CH2 Input CH3 Input CH4 Input Phoenix Euroblock CH1 Output CH2 Output CH3 Output CH4 Output Phoenix Euroblock Mains Connection IEC Blank Plate for Expansion Module optional ...

Page 6: ...To avoid clipping reduce the level of the input The amplifier has a selectable limit option which can be engaged to help avoid clipping and it is recommended that this mode is used if the potential exists for extended periods of clipping The amplifier has a protection circuit which activates when a fault condition exists The LED will stay illuminated until the fault is resolved The protection circ...

Page 7: ...led by toggling the under panel A STBY switch from Off to On In this mode if no signal is detected for 25 mins the amplifier will sleep and wake within 660ms of detection of signal Mute mode puts the amp into a light sleep and occurs when the Standby option has been selected and no signal has been detected for 10mins if the amplifier detects signal it will wake within 1ms When no signal has been d...

Page 8: ...QX 4300 USER MANUAL 08 QUESTAUDIO NET INPUT OUTPUT WIRING Balanced Input Wiring Unbalanced Input Wiring Output Wiring ...

Page 9: ...Signal Detection Orange Red Limiter Clip Cooling Fan cooled temperature dependent Features Wake On Music Auto Mute 1ms wake up Limiting on High Temperature Amplifier Protection Systems Thermal protection Over Current Protection DC Protection HF Protection Mains Input Voltage Range 85VAC 265VAC Standby Power Consumption 4 8W Muted Power Consumption 16W Idle Power Consumption 28W Standard Power Cons...

Page 10: ...QX 4300 USER MANUAL 10 QUESTAUDIO NET TECHNICAL DRAWINGS 345mm Height 1RU 19 ...

Page 11: ...ing Quest Please take the time to complete your product registration Registering your Quest Engineering product will Confirm your warranty Register your product Protect your new product REGISTER ONLINE questaudio net warranty reg For spare parts and service ...

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