0.1MHz‑6GHz Full Band Low Noise Amplifier Professional 20dB High Gain LNA RF Power Preamplifier Module
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Fosi Audio V3 Stereo Power Amplifier 300W *2 TPA3255 Class D Mini Amp 2 Channel Audio Amplifier for Subwoofer Passive Bookshelf
4.7 (105 votes) | 500 orders
Price:
US $420.11
Discount Price:
US $
249.70
-41%
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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
Feature
Compact Yet Powerful: The V3 mini power amplifier combines a minimalist design with exceptional performance. With a power output of up to 600W, it can effortlessly drive 2-8Ω speakers, delivering impressive sound quality. Its compact size makes it suitable for various applications, from bookshelves and desktop setups to home theaters
Audiophile-Grade Components: It features the TPA3255 high-end digital class D amp chip and utilizes premium Japanese NCC, ELNA, and German WIMA capacitors, and Japanese Sumida inductors for exceptional audio quality. With a SINAD rating of up to 88dB, an SNR of up to 110dB, and a low noise floor of only 140uV, it delivers exceptional clarity and low distortion
Innovative Cooling: The V3 stands out with its groundbreaking heat dissipation design. Equipped with vents on the casing's top and bottom, and a whole-body heatsink design, it efficiently dissipates heat, preventing damage to components and ensuring optimal performance
Scalable and Fun: Tailor your sound experience by swapping the stock NE5532 op-amps. V3 is compatible with a variety of 8-pin dual op-amps like Sparkos SS3602, MUSES02, OPA2604, OPA2134PA, OP249, AD827, RM4559, LM4562, LME49720HA, etc. When replacing the op-amp, please make sure the chip is oriented correctly and the procedure is done accurately
Enhanced Pre-out Functionality: The V3 features an optimized "Pre-out" design. The level is now controlled by the volume control, allowing for adjustable sound levels when connected to the "Pre-out." This enhancement offers greater flexibility and convenience for users who prefer to fine-tune their audio experience
Highlight:
1. Replaceable Op-Amp Chips: , ,
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.
https://www.youtube.com/watch?v=feH5_22hQCA 07:43 Rolling Op-Amps
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: https://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:https://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.
Packaging Details
- Unit Type:
- Package Weight: 1.200
- Package Size: 20x6x25
- Brand Name: Fosi Audio
- Hign-concerned Chemical: None
- Maximum Power Per Channel: Above 200W
- Origin: Mainland China
- Package: Yes
- Channels: 2 (2.0)
- Certification: CE
- Model Number: V3
- Input: RCA
- Output: Speaker Output+3.5mm Pre-out
- MAX Power Output: 300w x2
- Type: Stereo Audio amplifier
- Feature: audio amplifier
- Highlight: Home Theater Amplifier
- Power Amplifier Chip: TI TPA3255
- SINAD: 88dB
- SNR: ≥110dB
- Dynamic Range: ≥110dB
- THD: <0.003%
- Terminal Impedance: 2~8Ω
- Output Power: Max 300W x2@4Ω
- Input Voltage Range: DC 24V~48V
- feature: HIFI amplifier
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 location 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 |
Do you provide tracking information?
Yes, you will receive an email once your order ships that contains your tracking information.
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.
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, if you’d like a refund you can request one no matter the reason.
If you did not receive the product within the guaranteed time(60 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 receive you may request a refund but you must return the item at your expense and the item must be unused.
- 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 CNTRONIC Consumer Electronics Retailer (i.e. not cleared by customs, delayed by a natural disaster).
- Other exceptional circumstances outside the control of cntronic.com
*You can submit refund requests within 15 days after the guaranteed period for delivery (60 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.
LARGE ORDER DEALS
Thank you for your interest doing business with us!
If you would like to get a discounted price for your large purchase orders, fill in the required blanks along with your email address, the product Item ID # and/or the link of the item that you want to order, item quantity (minimum of 30 pieces), shipping country and payment method is required. We will contact you with a discounted price as soon as we receive your inquiry.
