HiFi ESS ES9028Q2M ES9028 I2S Input Decode Board Mill DAC Upgrade ES9018 amplifier DIY DSD IIS-32bit 384K DSD64 128 256 512 Ship to worldwide via post air mail with tracking number. Features: Power requirements: DC dual 40v DC40V positive --0 - DC40V negative about 300w power transformer footAudio: Mono Please use good shielding performance audio cableAudio output: mono power 8Ω ± 40V load time around 255WTotal harmonic distortion (Po = 5W, f = 1KHz) 0.005%;Frequency Response: 20Hz-20Kz slew rate 15V / μsVolume Adjustment: no , Can be used with pre-board or potentiometers to adjust the volumeCooling requirements: 0.8 kg greater the greater the heat output power (required to buy their own)PCB size: 100mm*35mmPCB board marked with the names of all the above elements, the installation of just condemnation on the line, pay attention to the good part of the element can be positive and negative.After many enthusiasts test phenomenon on the market due to the impedance of 4 ohms speaker impedance parameters between true and false mixed vacuity boxes often appear more popular chip burned so please choose 6-8 ohms speaker safer.DC 30v-45v voltage can be a voltage different sound change, 32-40v the safest and most suitableSuite All resistors are high-precision 1% metal film resistors, high precision is to protect the normal and stable operation of the line.All capacitors, with high-precision resistors are 1% metal film resistors, high precision is to protect the normal and stable operation of the line.All capacitors used in all imported, Siemens, Philips metal film capacitors 104 and 105 nichicon 50v220uf ruby 50v10uf. Board with 2 oz copper double-sided fiberglass board, to ensure that the work of ultra-stable circuit switching diodes use Philips 1N4148. Package Included: 1PC x TDA7293 three Parallel 300W Mono Power Amplifier Board Diy Kits (No welding) SHIPPING1. Shipping to worldwide. If send by post air mail usually to Europe within 15 days after sent out. To USA we will send by ePacket and usually after sent out about 10 days can receive. 2. Orders processed within 24-48 hours of payment verification.3. The images shown are the actual item and photographed by myself. 4. SERVICE TRANSIT TIME is provided by the carrier and excludes weekends and holidays. Transit times may vary, particularly during the holiday season.5. If you have not received your shipment within 30 days from payment, please contact us. We will track the shipment and get back to you as soon as possible with a reply. Our goal is customer satisfaction! PAYMENTS1. Payment must be made within 4 days of product closing. (Non-payment may result in a UPI (Unpaid Item) being put on your account. .