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Fosi Audio Stereo Power Amplifier 300W x2 TPA3255 Class D Mini Speaker Amp 2 Channel Audio Amplifier for Passive Bookshelf

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Fosi Audio V3 Stereo Power Amplifier 300W x2 TPA3255 Class D Mini Speaker Amp 2 Channel Audio Amplifier for Passive Bookshelf
 

Notice: If you choose to ship from the Brazil warehouse, Aliexpress currently does not offer the option of collecting and paying ICMS fees on behalf of the buyer. If it is found later by the tax authorities that ICMS fees need to be paid, the buyer is responsible for paying them, and the seller will not bear the responsibility. if you mind to pay 18% of the ICMS fee, please choose to ship from China, thank you for your understanding!

Highlight:
 

1. Replaceable Op-Amp Chips: MUSES02, OPA2134PA, OPA2604AP

2. Passive Speakers + Pre-out   

3. Replaceable Knobs: ORANGE KNOB

Note: The “Pre-out” level is NOT controlled by the volume control as the V3 is not an integrated amplifier, so the sound is NOT adjustable when you are connected to the “Pre-out”.

Specifications:

  • Max Power Output: 300Wx2 @4Ω

  • SINAD: 88dB

  • SNR: ≥110dB

  • Terminating Impedance: 2-8Ω

  • THD: 0.001%

  • Power Amp Chip: TI TPA3255

  • Op-Amp: TI NE5532 x2

  • Power Supply: 32V/5A, 48V/5A

  • Input Range: DC 24V-48V

  • Frequency Response Range: 20Hz-20kHz(±1.2dB)

FAQ
 

Q: The screws on the bottom are so tight it is impossible to remove with a normal hex wrench.Any tips how to get them loose?

A:The H2.0mm Allen Wrenchis able to loosen it.

 
Q: Low volume on new V3
A: Please ensure that you set the volume level of your audio source to 50% or higher, and adjust the V3 amplifier's volume to maximum. The V3 amplifier is equipped with a built-in logarithmic taper A Pot, which means the volume control becomes more responsive at higher levels (see the below diagram). If you encounter low volume issues, you can also consider using a preamp to address this.
 
Q: How can I connect an active subwoofer and control the volume if it s constant output?
A: Connect a single 3.5mm cable from the preout to the audio input port on the active subwoofer. You can refer to the tutorial video at this link: //youtu.be/WhYpHkovCWs (go to 2:44 for the PRE OUT demonstration).
The “pre-out” is a fixed output, you could control the volume by the input device connected to the V3.
 
Q: I was just wondering what the differences were by using the different op amps?
A: Different op-amps can produce varying sound qualities. You can refer to this video showing different dual op-amps for comparison://www.youtube.com/watch?v=nrqVYE4_v1M
You can consider replacing it with op-amps like the SS3602, MUSES02, available on our official website, or options like ORACLE II-02 and LME49720, for different sound.
 
Q: I intend to use the V3 as a power amp and control the volume with the preamplifier.  Is the volume on the V3 a passive attenuator or an active gain circuit?
AThe volume on the V3 is an active gain circuit, you can set the V3 amp at the 3:00 position, then turn up the preamp controls to your comfortable listening level.

SHIPPING AND DELIVERY

We are proud to offer international shipping services that currently operate in over 200 countries and islands world wide. Nothing means more to us than bringing our customers great value and service. We will continue to grow to meet the needs of all our customers, delivering a service beyond all expectation anywhere in the world.

How do you ship packages?

Packages from our warehouse in China will be shipped by ePacket or EMS depending on the weight and size of the product. Packages shipped from our US warehouse are shipped through USPS.

Do you ship worldwide?

Yes. We provide free shipping to over 200 countries around the world. However, there are some locations we are unable to ship to. If you happen to be located in one of those countries we will contact you.

What about customs?

We are not responsible for any custom fees once the items have shipped. By purchasing our products, you consent that one or more packages may be shipped to you and may get custom fees when they arrive to your country.

How long does shipping take?

Shipping time varies by location. These are our estimates:
Location *Estimated Shipping Time
United States 10-30 Business days
Canada, Europe 10-30 Business days
Australia, New Zealand 10-30 Business days
Central & South America 15-30 Business days
Asia 10-20 Business days
Africa 15-45 Business days
*This doesn’t include our 2-5 day processing time.

Do you provide tracking information?

Yes, you will receive an email once your order ships that contains your tracking information. If you haven’t received tracking info within 5 days, please contact us.

My tracking says “no information available at the moment”.

For some shipping companies, it takes 2-5 business days for the tracking information to update on the system. If your order was placed more than 5 business days ago and there is still no information on your tracking number, please contact us.

Will my items be sent in one package?

For logistical reasons, items in the same purchase will sometimes be sent in separate packages, even if you've specified combined shipping.

If you have any other questions, please contact us and we will do our best to help you out.

REFUNDS & RETURNS POLICY

Order cancellation

All orders can be cancelled until they are shipped. If your order has been paid and you need to make a change or cancel an order, you must contact us within 12 hours. Once the packaging and shipping process has started, it can no longer be cancelled.

Refunds

Your satisfaction is our #1 priority. Therefore, you can request a refund or reshipment for ordered products if:

  • If you did not receive the product within the guaranteed time( 45 days not including 2-5 day processing) you can request a refund or a reshipment.
  • If you received the wrong item you can request a refund or a reshipment.
  • If you do not want the product you’ve received you may request a refund but you must return the item at your expense and the item must be unused.

We do not issue the refund if:

  • Your order did not arrive due to factors within your control (i.e. providing the wrong shipping address)
  • Your order did not arrive due to exceptional circumstances outside the control of SUPER GLOBAL MALL (i.e. not cleared by customs, delayed by a natural disaster).
  • Other exceptional circumstances outside the control of

*You can submit refund requests within 15 days after the guaranteed period for delivery (45 days) has expired. You can do it by sending a message on Contact Us page

If you are approved for a refund, then your refund will be processed, and a credit will automatically be applied to your credit card or original method of payment, within 14 days.

Exchanges

If for any reason you would like to exchange your product, perhaps for a different size in clothing. You must contact us first and we will guide you through the steps.

Please do not send your purchase back to us unless we authorise you to do so.

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