* Estimated delivery times start from the date of shipment, excluding processing time.
* Actual delivery times may vary due to holidays, weather conditions, or customs delays.
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: +8619359849471
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: +8619359849471
Features:
TPA3255 is a high-performance Class-D power amplifier chip, which has Class-D efficiency and can bring real high-end sound quality circuit. The device features an advanced integrated feedback design and proprietary high-speed gate driver error correction (PurePathu2122 Ultra HD). This technology allows the device to maintain ultra-low distortion across the entire audio frequency band while delivering sound quality. The device operates in AD mode, can drive up to two 315W/4R loads and two 150W (unclipped power)/8R loads at 1.5% THD, and features a 2 VRMS analog input interface for interfacing with high-performance DACs (such as TI"s PCM5242) seamless connection. In addition to excellent audio performance, the TPA3255 combines high power efficiency with ultra-low power-level idle losses (less than 2.5W). This can be achieved with an 85mR MOSFET and an optimized gate driver scheme. Compared with the traditional discrete implementation scheme, this scheme can significantly reduce the idle loss.
Tips:For questions about your order, place of delivery, product discount, taxation, delivery time, warranty, shipping, payment, exchange rate, and other questions unrelated to the product, please contact customer service.
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A part of the QA has been auto-translated.
0
Q:
Can I connect both outputs to a single speaker (bridge) ?
Can I connect both outputs to a single speaker (bridge) ?
Not directly as the two outputs are in phase. However, with a bit of DIY it may be possible. All you need to do is invert the signal sent to either input. Take a twin op-amp IC, set their amplification to 1 (connect the output through a small resistor to the inverting input (-), then feed one op-amp through the inverting input (+), the other through the non-inverting input (-). Short the amplifier's electrolytic capacitors at the output if there are any. Make sure that both outputs are on the same potential as they are now DC coupled to the loudspeakers. Alternatively, you can replace them with bipolar electrolytic caps but these are not cheap. A good result can't be guaranteed as at higher frequencies the phase shift of the two channels may not be exactly identical. It's worth a try but remember that double the output voltage means four times the output power.
Not directly as the two outputs are in phase. However, with a bit of DIY it may be possible. All you need to do is invert the signal sent to either input. Take a twin op-amp IC, set their amplification to 1 (connect the output through a small resistor to the inverting input (-), then feed one op-amp through the inverting input (+), the other through the non-inverting input (-). Short the amplifier's electrolytic capacitors at the output if there are any. Make sure that both outputs are on the same potential as they are now DC coupled to the loudspeakers. Alternatively, you can replace them with bipolar electrolytic caps but these are not cheap. A good result can't be guaranteed as at higher frequencies the phase shift of the two channels may not be exactly identical. It's worth a try but remember that double the output voltage means four times the output power.
Answered by farkasditke73 on 09/12/2023Helpful (0)
0
Q:
Does it works with 24v 6amps dc power supply also can you share the load conditions and does it uses texas 2355
Does it works with 24v 6amps dc power supply also can you share the load conditions and does it uses texas 2355
This is an amplifier, it has no volume adjustment. You need a preamp or even just wire in a potentiometer to control the volume if you need to. You could use the phone for example to adjust the volume.
This is an amplifier, it has no volume adjustment. You need a preamp or even just wire in a potentiometer to control the volume if you need to. You could use the phone for example to adjust the volume.
Answered by BG537200442 on 29/09/2023Helpful (0)
0
Q:
why the sound stops when we increase the volume? and then one led will go off.
why the sound stops when we increase the volume? and then one led will go off.