ZK-502L is a high-power stereo Bluetooth audio module. Dual channels audio signal output.Built-in amplifier module therefore it can connect to loudspeaker directly.It is ideal for DIY wireless Bluetooth speakers and transponders.
1>.Width work voltage range
2>.Applicable multiple type speakers
4>.Support short circuit protection
5>.Support over temperature protection
6>.Dual stereo output
7>.Built-in filter capacitor
8>.Potentiometer support switch function
1>.Product name:ZK-502L Stereo Bluetooth Power Amplifier Module
3>.Work Voltage:DC 5V-24V
5>.Channel:Dual channel stereo output
9.1>.Output power 12W*2 at 12V 8ohm
9.2>.Output power 20W*2 at 12V 4ohm
9.3>.Output power 18W*2 at 15V 8ohm
9.4>.Output power 30W*2 at 15V 4ohm
9.5>.Output power 32W*2 at 19V 8ohm
9.6>.Output power 45W*2 at 19V 4ohm
9.7>.Output power 38W*2 at 24V 8ohm
9.8>.Output power 50W*2 at 24V 4ohm
1>.Choose the right speaker and connect as shown in wiring diagram.
2>.Connect to right power supply from input terminal.LED indicator will flashing and it means that module enters pairing mode.And then speak prompt voice and it means that module is waiting for pairing.
3>.Turn ON Bluetooth in phone.
4>.Select Bluetooth device ‘BT-WUZHI’ in your Bluetooth device listing.
5>.LED indicator will keep ON and it means that module is successfully connected and is waiting for playing.
6>.Module will playing music after select music in phone.LED indicator will keep slowly blinking.
7>.Increase volume by turn right potentiometer.
8>.Decrease volume by turn left potentiometer.
9>.Press potentiometer to play or pause music.
10>.Module will speak prompt voice if disconnected.
3>.Car Bluetooth device
1>.The power amplifier board should be as far away as possible from the WIFI signal (router) avoid signal interference.
2>.Recommended power supply voltage DC 5~24V.Module will be damaged if input voltage is more than 24V.
3>.Please don’t use too long wires to avoid signal interference.
4>.Please read use manual and description before use.
7.Frequently Asked Questions:
1>.How to choose a power supply adapter?
Q: The power supply of the module is very critical. The user must pay enough attention to the power supply. Otherwise it may not work properly.
The higher the voltage and the higher the current then the better the output power. It is better to connect 3~4in speaker if user only have 12V 1A power adapter. It is no problem to connect 8~10in speaker if user have a power adapter which more than 19V 5A.
If the voltage is too low, the sound will be distorted after the sound is amplified.
If the current is too small, the speaker cannot be driven to work, and the speaker will pull the voltage low, resulting in abnormal operation or poor sound quality.
It is recommended to use 18V/19V/24V power supply with current above 3A.
Putting the volume to the maximum may be distorted, affecting the sound quality if input low power adapter such as 9V/12V 1A/2A adapter.
2>.How to choose a speaker?
Q:Commonly used speakers are generally 4ohm~8ohm.The speaker no need distinguish between positive and negative polarity.
It can also work properly if the speaker has low power such as 10W~30W. But it needs connect to low power adapter such as less than 15V to prevent damage to the speaker.
User don't have to worry about the problem of the speaker burning out if connect to 50W~200W speaker.Module can connect 12V~24V.The higher the voltage selected, the greater the sound or power that can be output.
3>.Why is the volume working normally when volume small, and there is turbidity after increase volume?
Q: Sound distortion.Please change the adapter power supply with higher voltage level.
4>.Why is the volume working normally when volume small, and there is pause after increase volume?
Q: The input power is insufficient.Please change the adapter power supply with higher voltage level.
Power supply itself intermittent power-off protection.Please change a match power adapter.
The power of the power supply is too large so please reduce the power of the input power.
The power amplifier board is seriously heated resulting in trigger overheat protection.So please increase the radiator.
1>.1pcs ZK-502L HIFI Stereo Bluetooth Power Amplifier Module
2>.1pcs DC-005 20cm power cable
3>.1pcs 6mm knob cap
4>.1pcs M6 nut
5>.1pcs M6 screw mat
First we should say that ICStation doesn't accept any form of pay on delivery.Items used to be shipped after receiving the order info and payment.
1) Paypal Payment
PayPal is a secure and trusted payment processing service that allows you to shop online. PayPal can be used at icstation.com to purchase items by Credit Card (Visa, MasterCard, Discover, and American Express), Debit Card , or E-check (i.e. using your regular Bank Account).
We are PayPal Verified
2) West Union
We know that some of you do not have the Paypal account.
But please take it easy. You can use West Union payment method.
For the receiver info, please contact us at firstname.lastname@example.org.
3) Bank Transfer / Wire Transfer / T/T
Bank Transfer / Wire Transfer / T/T payment methods are accepted for orders which the total price is up to US$500. The bank will charge about US$60 for the transfer fee if we do the payment in these ways.
For other payment method, please contact us at email@example.com for more details.
1. Hongkong / Sinapore Airmail
(1) Due to the high risk of package lost recently, we have to stop using the free shipping way these days. Hope for your kind understanding! And the $3 is for tracking number and delivery insurance ^0^ Enjoy order from us.
Free Shipping for all orders over $20 ^0^ (with free tracking number and delivery insurance fee)
(2) Shipping time
Shipping time is 7-20 business days to most of countries; please view below table for exactly shipping time to your location.
7-15 working days to: Most of Asia countries
10-16 working days to: USA , Canada , Australia , UK , Most of Europe countries
13-20 working days to: Germany , Russia
18-25 working days to: France , Italy , Spain , South Africa
20-45 working days to: Brazil , Most of South America countries
2. EMS/DHL/UPS Express
(1)Shipping Fee: Free for the order which meet the following requirements
Total price of the order >= 200USD or Total weight of the order >= 2.2KG
When the order meets to one of the above requirement, it will be shipped for FREE via EMS/DHL/UPS Express to below country.
Asia: Japan , South Korea , Mongolia . Malaysia , Singapore , Thailand , Vietnam , Cambodia , Indonesia , Philippines
Oceania: Australia , New Zealand , Papua New Guinea
Europe& America: Belgium, Britain, Denmark, Finland, Greece, Ireland, Italy, Luxembourg, Malta, Norway, Portugal, Switzerland, Germany, Sweden, France, Spain, USA, Austria, Canada
Note: Shipping Fee to other countries, please contact orders@ICStation.com
(2) Shipping Time
Shipping time is 3-5 working day (about 1 week) to most of countries.
Because the package would be returned to the sender if it had not been signed by the receiver in 2-3 day (DHL) or 1 week (EMS,) or 2 weeks (Registered Email), please pay attention to the arriving time of the package.
1) APO and PO Box Addresses
We strongly recommend that you provide a physical address for order delivery.
Because that DHL and FedEx are unable to deliver items to APO or PO BOX addresses.
2) Contact Phone Number
Receivers' contact phone number is required by express shipping agency for the package delivery. Please provide us with your latest phone number.
1) Delivery Time of mixed orders with items in different Shipping Status should be calculated using the longest estimate times listed.
2) Chinese Holiday Reminder: During annual Chinese holidays, services from certain suppliers and carriers may be affected, and delivery for orders placed around the following times may be delayed by 3 - 7 days: Chinese New Year; Chinese National Day,etc.
3) Once your order is shipped, you will receive an email notification from icstation.com
4) Track the order which with tracking number via below links: