150W2 Amplifier Board NJW0281G NJW0302G OnSemi Tube Amplifiers Craftsmanship Classic SoundFinished Add Cooling

Output impedance: 4 to 8s Power supply voltage: AC dual 18V to dual 35V, DC ±24V to ±42V (when the voltage is higher than AC dual 32 or ±42, use a capacitor with a withstand voltage of 63V) Output power: 150W+150W output, it’s no problem to push the home floor box PCB size: 155*80mm, the two heat sinks installed in our store are 160mm wide*155mm long*50mm high Installation precautions: Insulation sheets must be added to the 4 large tubes, which are included in the package, and the heat sink is installed before debugging. When testing, please carefully confirm whether the wiring is correct. Do not screw the screws on the board. Two heat sinks are used so the cost will be higher, but the heat diipation is good, and it is more casual and more aured to use. DIY is no longer complicated. Even if you buy spare parts, the initial static current of the welded board is around 50MA. We have done this complex work that ly needed to be adjusted in advance. The board you welded is free of debugging ( Of course, veterans can also adjust according to their own requirements). If you don’t have a watch and want to use a pair of tube amplifiers, we are right. The board comes with a rectifier and filter circuit, no need to add a power board. It has a speaker protection function to protect expensive speakers. Taking into account the long-distance expre delivery, the large heat sink is not installed by default when the finished board is shipped. If it is installed and shipped, it will easily cause deformation and damage to the pins. After you receive the goods, you only need to mount the mica sheet and tighten the screws. Yes, some screws need 2.5MM Allen wrench, A few questions that are often asked: 1; Do you want to add a preamp? --Whether you want to add a preamp depends on your personal needs. If you want to increase the ba, add a tonal preamp. The power of the preamp will be greater. 2; Is it poible to use a car? --Yes, but you need to add a power booster board to convert 12V into ±24V to ±48V, and ±30V or more is recommended. 3; Will there be noise? --No, it is very quiet when properly installed. It is recommended to use a metal case, shielding and heat diipation are helpful. 4; Is there after-sales technical support after purchase? --Of course, we strive to solve all the problencountered in installation. Note: The manufacturer does not provide the schematic diagram of this amplifier. If you don’t understand, please contact the seller, thank you. Package: 1PC.

About shipping
Shipping and Packaging All itwill be double checked and well packed before sending.Itwill be dispatched within 2 business days after buyers pay for the order. It usually takes about 14 to 18 working days for delivering the package to the destination(for remote areas,it may take a little longer). 

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Please fill in the correct and detailed consignee, address and phone number in the order. For fast and correct delivery.If you do not receive order within 30 working days,please feel free to contact Customer Service before leaving Negative and Neutral Feedback, we will do our best to help you resolve the problem.TaxNo, you will only pay what is quoted as total cost at checkout, no more. You are not expected to pay any additional duties ores. If you are asked by Customs or our logistic partner to pay duties, please contact our Customer Service .

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If the product is not on good condition, You can return this product within 14 working days, please contact customer service center before returning.FeedbackYour satisfaction is our first priorityIf you receive the order and it is in good condition,we would be grateful if you would leave us 5 star Positive Feedback for the transaction.