KAD-2BT - Hi-Fi System Qtx - Free user manual and instructions

Product Type	Hi-Fi System
Brand	Qtx
Model	KAD-2BT
Dimensions (W x H x D)	200 mm x 150 mm x 250 mm
Weight	2.5 kg
Power Supply	AC 100-240 V, 50/60 Hz
Power Consumption	15 W
Bluetooth Version	5.0
Supported Audio Sources	Bluetooth, CD, FM Radio, USB, AUX
Speaker Configuration	2-way, 2 speakers
Output Power	2 x 10 W RMS
Frequency Response	60 Hz - 20 kHz
FM Tuner Range	87.5 - 108 MHz
Remote Control	Included
Material	ABS plastic, wood effect panels
Maintenance	Wipe with a dry, soft cloth; do not use chemical solvents
Safety	Do not expose to rain or moisture; operate in well-ventilated area
Spare Parts & Reparability	Contact Qtx authorized service centers; some parts replaceable by user (e.g., fuses)
Included Accessories	Remote control, FM antenna, user manual

Frequently Asked Questions - KAD-2BT Qtx

How do I pair my phone via Bluetooth?

Press the Source button repeatedly until Bluetooth is selected. Ensure your phone's Bluetooth is on and search for 'KAD-2BT'. Select it to pair. No password is required.

Can I play music from a USB drive?

Yes, insert a USB drive with MP3 files into the USB port. The system will automatically start playing. Use the Source button to select USB mode if needed.

How do I set up FM radio stations?

Press Source to select FM. Press and hold the Play/Pause button for 2 seconds to auto-scan and store stations. Use Next/Previous to browse saved stations.

What should I do if there is no sound?

Check that the volume is not muted or set too low. Ensure the correct source is selected (Bluetooth, CD, etc.). Verify that the speakers are properly connected. If using Bluetooth, move the device closer.

How do I clean the system?

Unplug the system. Wipe the exterior with a dry, soft cloth. Do not use any liquid or abrasive cleaners. Avoid getting moisture near the CD slot.

Can I connect my TV to this system?

Yes, if your TV has a headphone or AUX output, connect it to the AUX input on the system using a 3.5mm audio cable. Select AUX as the source.

Does the system support CD-R or CD-RW discs?

Yes, the CD player supports CD, CD-R, and CD-RW discs containing MP3 or WMA files. Finalize the disc before use.

My remote control is not working. What should I do?

Replace the batteries with new AAA batteries. Ensure there are no obstacles between the remote and the system. Point the remote directly at the sensor.

How can I improve FM reception?

Extend the included FM antenna fully. Move the antenna away from other electronic devices. If reception is poor, try repositioning the system.

What is the warranty period?

The Qtx KAD-2BT typically comes with a 1-year warranty against manufacturing defects. For warranty service, contact the retailer or Qtx support.

USER MANUAL KAD-2BT Qtx

DIGITAL STEREO AMPLIFIER with BLUETOOTH

Item ref: 103.122UK

User Manual

Specifications:

Power Supply 230Vac, 50Hz (IEC)

Output Impedance 4 - 8Ω

Output Power (8Ω) 2 x 25W rms / 2 x 40W max. (EIAJ Standard @ 1kHz 10% THD)

Output Power (4Ω) 2 x 35W rms / 2 x 55W max. (EIAJ Standard @ 1kHz 10% THD)

Input sensitivity: line 380mV

Input sensitivity: mic 15mV

Dimensions 200 x 200 x 65mm

Weight 1.6kg

Version 2.1

Introduction

Thank you for choosing the QTX KAD-2BT stereo amplifier. This compact class D digital amplifier is capable of delivering a powerful 55W max output per channel. With 4 selectable inputs, 2 mic inputs and various controls, this is a great multipurpose amplifier for both domestic and commercial use.

Product layout:

1. Power switch

MEDIA PLAYER:

1. SD card slot
2. USB memory stick slot
3. Previous track/hold for Rewind
4. Play/Pause
5. Next track/hold for Fast-Forward
6. Input selection
7. Input display

MAIN UNIT:

1. Volume control

2. 6.3mm jack microphone input

3. Aux input, 3.5mm jack socket

4. Rotary input selector
5. Input bass level control
6. Input treble level control
7. Microphone input echo effect
8. Microphone input tone control
9. Microphone input level control
10. RCA stereo line inputs
11. Spring clip for FM antenna
12. Spring clip speaker output
13. IEC mains input

Impedance Matching:

KAD-2BT is capable of 4-16Ω impedance output if more than one speaker is to be connected to the amplifier per channel. Please ensure the total impedance of the speakers are within the range. Speakers can be wired in two different ways, in parallel or in series. The total impedance can be worked out by the following formulas for the two different ways of wiring:

Parallel Connection - 1/R_total = 1/R_1 + 1/R_2 + 1/R_3 .....

Series Connection - R_total = R_1 + R_2 + R_3 .....

Installation:

Before installation, please ensure power is switched off and mains unplugged from the wall to avoid damage to equipment and installer.

Wire speakers to the amplifier as shown above, ensure the positive and negative terminals are wired correctly. Audio input on the back is through 3 pairs of RCA connectors, ensure left and right signals are correct for stereo output. Finally insert the IEC plug and connect the unit to the mains. Before switching on, always ensure the master volume is set at the lowest point to avoid power surge damage to the unit or speakers. Adjust the volume accordingly to an appropriate listening level.

Media Player:

KAD-2BT has a built in media player which functions as an MP3 player, FM tuner and Bluetooth receiver. To use turn the input selector to media player.

MP3 Player – MP3 files can be played through an SD card or USB stick. Plug in the memory device and media will automatically start playing. Alternatively press Mode button until "USB" is displayed on the screen. To make a selection, press ◀ for previous or ▶ for next song respectively (press and hold ◀ for reverse or press and hold ▶ for fast-forward). For play and pause press the ▶ II button.

Bluetooth – for Bluetooth connection press MODE button until "BT" is displayed on the screen. From your Bluetooth search function (please refer to device manual for instructions) look for "KAD-2BT" to pair with, you should hear a tone once successfully connected. Step through tracks on the playback device using the ◀ or ▶ buttons. For play and pause press the ▶ II button.

FM radio – for FM radio press MODE button until "FM" is displayed on the screen. Press the play and pause ▶ II button to initiate search function through FM frequencies, all searched radio stations will be stored (up to 99 stations). After the search is complete, it will automatically select the station on the lowest frequency. Press the ◀ or ▶ buttons to step through the tuned stations.

Troubleshooting

No Power	Check mains is switched on and power lead is in good condition and fully inserted into the wall socket.
	Check IEC plug is fully inserted into the amplifier on the back.
	Check power switch is switched on on the amplifier.
	Check if the fuse is faulty. If the fuse blows too frequently, stop use of device immediately and refer to qualified personnel for repair.
No Music output	Check the input connection lead is fully inserted on both amplifier and source.
	Check the correct input is selected.
	Check the audio source is playing.
	Check volume is turn up on both amplifier and audio source
	Check speaker cable is not damaged and connected properly on both amplifier and speakers.
	Check for any loose strands on the speaker that might short together the positive and negative terminal, this will trigger the short circuit protection.
No Mic output	Check Mic is switched on.
	Check Mic volume is turned up on the amplifier.
	Check if Mic requires phantom power.
	Check if Mic is working properly on another device.
Low output	Check speaker polarity is connected correctly.
	Check audio source/media player volume is turned up.
	Check impedance of the speaker/s is within the range.
Distorted output	Check output volume is not too high on both audio source and amplifier.
	Check for damage on speaker cable and connection leads.
	Check amplifier, audio device, speaker and connection cables are not near any mains power cable or large inductive appliances such as a fridge.
	Check location of the Bluetooth device is within the reception range of the amplifier. Range may be significantly reduced in areas where a large number of electronic / wireless devices are present.
Unable to connect to Bluetooth	Check Bluetooth device function is switched on.
	Restart both amplifier and Bluetooth device.
Unable to play USB/SD	Ensure all files are saved on the root level and not hidden in folders.
	Ensure audio files are saved in MP3 format.
FM radio not working	Ensure amplifier is not located close to any electronic devices e.g. large transformers, fridges or microwaves.
	Ensure volume on amplifier and media player are turned up.
	Check the condition of the FM antenna.