Return items will be accepted within 40 days when is the date of receiving the goods. Customized items cannot be returned or exchanged. Items bought with an e-gift card are exchangeable only; refunds are not applicable.
Free Gift
Welcome to Roymall, your professional website for purchasing premium department store gifts. We highly value and appreciate your support, and we want to express our gratitude by adding an extra touch of excitement to your purchases. When you shop with us, you not only get to enjoy high-quality products that enhance your lifestyle, but you'll also receive an exclusive free gift with every order you place. Ready to explore our collection and find your perfect gifts? Browse our selection of premium department store items, place your order, and look forward to the excitement of your free gift arriving alongside your purchase.
Shipping Policy
We will work hard to deliver items to you after receiving your orders and make sure they arrive safely. Delivery details will be provided in your confirmation email.In most cases, orders are processed within 2 days.Under special circumstances, it will be delayed as follows: When you place an order on Saturday, Sunday or public holidays, it will be delayed for 2 days..Normally, it needs 5-7 working days (Monday to Friday) without being affected by flight delay or other environmental factors..Because our shipping service is worldwide so the delivery times will depend on your location so it may need a few times and please wait patiently if you are in remote districts or countries.
1. Return & Exchange Policy
We only accept items purchased from roymall.com. If you purchase from our local distributors or other retailers, you cannot return them on our side.Final sales items or free gifts are not acceptable for a return.To be eligible for a return, your item must be unused and in the same condition that you received it. It must also be in the original packaging.After receiving return instructions from us, please package up your returned items and drop your package at the local post office or another courier. We will process your return or exchange item within 3-5 working days after we receive it. The refund will be processed and credited automatically to your original method of payment.No returns or exchanges can be accepted if the product was custom produced, including custom size, custom
color, or custom printed.Need more help, please contact us. service@roymall.com or Whatsapp: +447549870296
2.Refund Policy
You'll get a full refund or 100% store credit after we receive the returned package and check it. The refund will be processed and credited automatically to your original method of payment.Please note that shipping costs and any duties or fees are not refundable. The extra shipping costs are non-refundable once the package has been shipped. You are responsible for paying these fees and we’re unable to waive or refund them, even if the order is returned back to us.Once we received and confirmed your returned item, we will send you an email to notify you that we have received your returned item. We will also notify you of the approval or rejection of your refund.If you have any problems regarding the refund process, please contact us. service@roymall.com or Whatsapp: +447549870296
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35V 4700uF Parameter Description:
Product Advantages: Use 25A flat bridge rectifier! Directly turn 4 lanes into 16 lanes, so that the current of this power module can reach 10A! The pond is limited, and there is no point in increasing the current! 4 0.1uf Brexit capacitors! There are only 2 ordinary power modules, only in front of the filter capacitor, and we have both in the front and the rear of the filter capacitor. The front eliminates the fluctuation of the rectifier bridge, and the rear eliminates the high-frequency clutter of the power supply, and the quality of the power supply is better! 4 35V4700uf or 50V3300uf electrolytic capacitors! More compact PCB layout! Easier to DIY! The 35V4700uf version is suitable for the output voltage not exceeding ±35V. The output DC voltage is about 1.4 times the input AC voltage. For example, if the input AC 18V, the output is ±25V, and the input single/double AC will output DC positive and negative dual voltages.
50V 4700uF Parameter Description:
Product Advantages: 25A full-wave rectification, and use 4 large electrolyzers to form a filter array, great dynamics! High Power! All in all! More responsive! Let the power amplifier board retract freely! Raise the upper limit of sound quality! The full-bridge rectifier will boost the voltage by about 1.4 times. For example, the AC input is 12V, and the output is about DC ±17V. The 50V version is suitable for situations where the output voltage does not exceed ±50V. The output voltage of the transformer will fluctuate with the fluctuation of the mains. In actual use, do not test the upper limit of the power supply, and be sure to leave a margin! If the voltage rises, it will likely cause the capacitor to explode! Especially the electrolysis with small volume and large capacity like 35V10000uf.
63V 3300uF Parameter Description:
Product Advantages: 5A full-wave rectification, and use 4 large electrolyzers to form a filter array, great dynamics! High Power! All in all! More responsive! Let the power amplifier board retract freely! Raise the upper limit of sound quality! The full-bridge rectifier will boost the voltage by about 1.4 times. For example, the AC input is 12V, and the output is about DC ±17V. The 63V version is suitable for situations where the output voltage does not exceed ±63V. The output voltage of the transformer will fluctuate with the fluctuation of the mains. In actual use, do not test the upper limit of the power supply, and be sure to leave a margin! If the voltage rises, it will likely cause the capacitor to explode! Especially the electrolysis with small volume and large capacity like 35V10000uf.
Roymall C.o.
Free Gift
Shipping Policy
Return Policy
Coupon Code
Direct purchase from the factory 
Electronic Components & Supplies
Module Board
Amplifier Board
