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About shipping
1.Important: Import duties, taxes and other customs related charges all are not included into shipping cost . Buyers bear all responsibility for all extra charges incurred (if any).
2. We only ship to confirmed order addresses. Your order address MUST MATCH your Shipping address. We can ship to virtually any address in the world. Note that there are restrictions on some products, and some products cannot be shipped to international destinations.
3. When you place an order, we will estimate shipping and delivery dates for you based on the availability of your items and the shipping options you choose. Depending on the shipping provider you choose, shipping date estimates may appear on the shipping quotes page.
4.Please also note that the shipping rates for many items we sell are weight-based. The weight of any such item can be found on its detail page. To reflect the policies of the shipping companies we use, all weights will be rounded up to the next full pound. The shipping rate can be showed at the Checkout page. There are two options for shippig as below.
A. Standard Shipping(≤2KG): The Post Registered Air Mail, USPS/ePacket, PostNL, Singapore Post, or DHL Global Mail
B. Express Shipping: EMS, DHL, UPS , or Fedex, Special Route.,etc. For faster shipping and smooth transaction, we will change the shipping company among them
C. Economy Shipping: China Air Post Mail / Parcel, Hongkong Air Post Mail / Parcel, or shipment by sea etc
RETURNS POLICY
You may return most new, unopened items within 7 days of delivery for a full refund. We'll also pay the return shipping costs if the return is a result of our error (you received an incorrect or defective item, etc.).
You should expect to receive your refund within four weeks of giving your package to the return shipper, however, in many cases you will receive a refund more quickly. This time period includes the transit time for us to receive your return from the shipper (5 to 10 business days), the time it takes us to process your return once we receive it (3 to 5 business days), and the time it takes your bank to process our refund request (5 to 10 business days). If you need to return an item, simply login to your account, view the order using the 'Complete Orders' link under the My Account menu and click the Return Item(s) button. We'll notify you via e-mail of your refund once we've received and processed the returned item.
SELLER GUARANTEES
1. One year Manufacturer`s limited Warranty for defective items (excluding items damaged and/or misused after receipt). Accessories come with a 3-month warranty.
2. Defective items MUST BE reported and returned within the warranty period (with the original packaging, if possible). You must tell us what the defect is and give us your order number. WE DO NOT REPAIR OR REPLACE ITEMS WITH AN EXPIRED WARRANTY. You agree to all of the above-listed policies upon ordering on our store.
SHIPPING RATE
How to check the latest shipping cost, please follow steps below.
1. Click the ADD TO CART button;
2. Click the GO TO CART button;
3. Input your Country, State or Province, Postal/Zip Code;
4. Finally, click the CALCULATE SHIPPING
Standard Shipping(≤2KG) ---Through Post Registered Air Mail, ePacket or DHL Global Mail,.etc.
| Weight(KG) | Shipping Code | Shipping Cost(USD) |
| 0.1~0.2 |
Standard Shipping The Post 0.2
|
3 |
| 0.21~0.3 |
Standard Shipping The Post 0.3
|
4 |
| 0.31~0.4 | Standard Shipping The Post 0.4 | 5 |
| 0.41~0.5 | Standard Shipping The Post 0.5 | 7 |
| 0.51~0.6 | Standard Shipping The Post 0.6 | 8 |
| 0.61~0.7 | Standard Shipping The Post 0.7 | 11 |
| 0.71~0.8 | Standard Shipping The Post 0.8 | 13 |
| 0.81~0.9 | Standard Shipping The Post 0.9 | 15 |
| 0.91~1.0 | Standard Shipping The Post 1.0 | 17 |
| 1.01~1.0 | Standard Shipping The Post 1.1 | 19 |
| 1.11~1.2 | Standard Shipping The Post 1.2 | 20 |
| 1.21~1.3 | Standard Shipping The Post 1.3 | 21 |
| 1.31~1.4 | Standard Shipping The Post 1.4 | 22 |
| 1.41~1.5 | Standard Shipping The Post 1.5 | 23 |
| 1.51~1.6 | Standard Shipping The Post 1.6 | 24 |
| 1.61~1.7 | Standard Shipping The Post 1.7 | 25 |
| 1.71~1.8 | Standard Shipping The Post 1.8 | 26 |
| 1.81~1.9 | Standard Shipping The Post 1.9 | 27 |
| 1.91~2.0 | Standard Shipping The Post 0.8 | 28 |
Express Shipping ---Through Special Routes, EMS, DHL, UPS ,Fedex, or TNT. For faster shipping and smooth transaction, we will change the shipping company among them
| Weight(KG) | Shipping Code | Shipping Cost(USD) |
| 0~0.5 |
Express Shipping L0.5
|
17 |
| 0.51~1 |
Express Shipping L1.0
|
20 |
| 1.01~1.5 | Express Shipping L1.5 | 25 |
| 1.51~2 | Express Shipping L2.0 | 30 |
| 2.01~2.5 | Express Shipping L2.5 | 35 |
| 2.51~3 | Express Shipping L3.0 | 38 |
| 3.01~3.5 | Express Shipping L3.5 | 40 |
| 3.51~4 | Express Shipping L4.0 | 42 |
| 4.01~4.5 | ExpressShipping L4.5 | 44 |
| 4.51~5 | Express Shipping L5.0 | 47 |
| 5.01~5.5 | Express Shipping L5.5 | 59 |
| 5.51~6 | Express Shipping L6.0 | 62 |
| 6.01~6.5 | Express Shipping L6.5 | 65 |
| 6.51~7 | Express Shipping L7.0 | 68 |
| 7.01~7.5 | Express Shipping L7.5 | 71 |
| 7.51~8 | Express Shipping L8.0 | 74 |
| 8.01~8.5 | Express Shipping L8.5 | 77 |
| 8.51~9 | Express Shipping L9.0 | 80 |
| 9.01~9.5 | Express Shipping L9.5 | 82 |
| 9.51~10 | Express Shipping L10.0 | 86 |
| 10.01~10.5 | Express Shipping L10.5 | 103 |
| 10.51~11 | Express Shipping L11.0 | 107 |
| 11.01~11.5 | Express Shipping L11.5 | 110 |
| 11.51~12 | Express Shipping L12.0 | 114 |
| 12.01~12.5 | Express Shipping L12.5 | 118 |
| 12.51~13 | Express Shipping L13.0 | 122 |
| 13.01~13.5 | Express Shipping L13.5 | 126 |
| 13.51~14 | Express Shipping L14.0 | 130 |
| 14.01~14.5 | Express Shipping L14.5 | 134 |
| 14.51~15 | Express Shipping L15.0 | 137 |
| 15.01~15.5 | Express Shipping L15.5 | 140 |
| 15.51~16 | Express Shipping L16.0 | 143 |
| 16.01~16.5 | Express Shipping L16.5 | 146 |
| 16.51~17 | Express Shipping L17.0 | 149 |
| 17.01~17.50 | Express Shipping L17.5 | 152 |
| 17.51~18 | Express Shipping L18.0 | 155 |
| 18.01~18.50 | Express Shipping L18.5 | 158 |
| 18.51~19 | Express Shipping L19.0 | 161 |
| 19.01~19.5 | Express Shipping L19.5 | 164 |
| 19.51~20 | Express Shipping L20.0 | 167 |
| 20.01~20.5 | Express Shipping L20.5 | 170 |
| 20.51~21 | Express Shipping L21.0 | 173 |
| 21.01~21.5 | Express Shipping L21.5 | 176 |
| 21.51~22 | Express Shipping L22.0 | 179 |
| 22.01~22.5 | Express Shipping L22.5 | 182 |
| 22.51~23 | Express Shipping L23.0 | 185 |
| 23.01~23.5 | Express Shipping L23.5 | 189 |
| 23.51~24 | Express Shipping L24.0 | 192 |
| 24.01~24.50 | Express Shipping L24.5 | 195 |
| 24.51~25 | Express Shipping L25.0 | 198 |
Note:
1.This table of shipping rate will be added to the checkout. The shipping rate can be showed at the Checkout page. And, the table is for reference only. Final shipping rate is subject to actual checkout.
2.The shipping rates for many items we sell are weight-based. The weight of any such item can be found on its detail page. To reflect the policies of the shipping companies we use, all weights will be rounded up to the next full pound.
3.If you have any questions about the shipping rate, pleas don't be hesitate to contact us through the ways as below.
Email: sales@iwistao.com
Description
Model No: WBTPA-D325A
Experience powerful, crystal-clear HiFi sound with the D325Q Digital Stereo Amplifier. Built around the renowned Texas Instruments TPA3255 amplifier chip, it delivers exceptional efficiency, ultra-low distortion, and impressive output power for audiophiles, home stereo enthusiasts, and DIY speaker builders.
Whether you're streaming music via Bluetooth or connecting a DAC, CD player, TV, or turntable preamp, the D325Q provides detailed, dynamic, and immersive stereo sound.
Why Choose the D325Q?
Unlike conventional budget Class-D amplifiers, the D325Q is engineered for true high-fidelity audio reproduction. Every component is carefully selected to provide outstanding sonic performance while maintaining excellent reliability for long-term use.
Designed for music lovers who appreciate accurate sound reproduction, this amplifier offers remarkable clarity, powerful bass, natural midrange, and smooth high frequencies.
Suitable for both casual listening and dedicated HiFi systems.
Key Features
Genuine TI TPA3255 Amplifier Chip
At the heart of the D325Q is the legendary Texas Instruments TPA3255, one of today's most respected Class-D amplifier solutions.
Benefits include:
- High efficiency operation
- Extremely low THD+N
- Wide dynamic range
- Excellent signal-to-noise ratio
- Powerful stereo output
- Stable long-term performance
The result is clean, accurate, and highly detailed sound reproduction.
High-Resolution Bluetooth Audio
The integrated Bluetooth receiver provides convenient wireless music streaming without sacrificing sound quality.
Features include:
- Fast pairing
- Stable wireless connection
- Long operating distance
- Low latency
- Compatible with Android, iPhone, Windows, macOS, and tablets
Enjoy your favorite playlists with cable-free convenience.
Multiple Audio Inputs
The D325Q easily integrates into almost any home audio system.
Compatible sources include:
- Bluetooth
- RCA Line Input
- AUX Input
- DAC
- CD Player
- TV
- PC
- Streaming Player
- Media Center
Switch between your favorite audio sources effortlessly.
Powerful Output for Passive Speakers
Designed to drive a wide variety of passive loudspeakers including:
- Bookshelf speakers
- Floor-standing speakers
- DIY speakers
- Nearfield monitors
- Home stereo systems
Recommended speaker impedance:
- 4Ω
- 6Ω
- 8Ω
Precision HiFi Sound
Carefully optimized audio circuitry provides:
- Wide stereo imaging
- Deep controlled bass
- Transparent midrange
- Smooth treble
- Excellent detail retrieval
- Low background noise
- High channel separation
Every musical instrument and vocal performance is reproduced naturally.
CNC Aluminum Chassis
The full aluminum enclosure not only enhances the appearance but also improves heat dissipation.
Advantages include:
- Better thermal stability
- Longer component lifespan
- Reduced vibration
- Premium appearance
- Durable construction
Remote Control Convenience
The included infrared remote allows you to:
- Adjust volume
- Switch input modes
- Mute playback
- Control playback (supported modes)
Operate your amplifier comfortably from anywhere in the room.
Perfect Applications
The D325Q is ideal for:
- Home HiFi Stereo
- Desktop Audio
- Living Room Entertainment
- DIY Speaker Projects
- Workshop Music
- Office Audio
- TV Sound Upgrade
- Bookshelf Speaker Systems
- Music Streaming
Available Configurations
Choose the package that best fits your setup.
Option 1
D325Q Amplifier Only
Perfect if you already own a compatible DC power supply.
Option 2
D325Q Amplifier + DC 36V 6A Power Supply
Balanced performance for everyday HiFi listening.
Option 3
D325Q Amplifier + DC 48V 5A Power Supply
Maximum output capability with higher efficiency, lower heat generation, and improved dynamic response.
Package Includes
Depending on your selected option:
- D325Q Bluetooth Amplifier x1
- Power Supply (Optional)
- Remote Control x 1
- Bluetooth ANT x 1
Specifications
| Item | Specification |
|---|---|
| Amplifier Chip | Texas Instruments TPA3255 |
| Amplifier Type | Class-D |
| Bluetooth Version | Bluetooth 5.0 |
| Audio Inputs | Bluetooth / RCA / AUX |
| Speaker Output | Stereo |
| Speaker Impedance | 4–8Ω |
| Remote Control | Included |
| Chassis | Aluminum Alloy |
| Cooling | Passive Heat Dissipation |
| Power Supply | DC 36V 6A / DC 48V 5A GaN |
| Application | Home HiFi Audio |
Why Buy from IWISTAO?
For over a decade, IWISTAO has specialized in HiFi audio equipment, DIY audio components, vacuum tube amplifiers, transformers, and speaker systems.
Every amplifier is carefully tested before shipment to ensure reliable performance and long service life.
When you choose IWISTAO, you receive:
- Professional HiFi Products
- Quality Inspection Before Shipping
- Worldwide Shipping
- Reliable Technical Support
- Secure Packaging
- Excellent Customer Service
Frequently Asked Questions
Does the amplifier include a power supply?
Three purchase options are available:
- Amplifier only
- Amplifier with 36V 6A power supply
- Amplifier with 48V 5A GaN power supply
Can it drive 4Ω speakers?
Yes.
The D325Q is designed to work with 4Ω, 6Ω, and 8Ω passive speakers.
Does it support Bluetooth?
Yes.
The amplifier features Bluetooth 5.0 for stable, high-quality wireless audio streaming.
Can I connect a DAC?
Absolutely.
The RCA input allows connection to external DACs, CD players, media players, and many other audio sources.
Is this suitable for desktop HiFi systems?
Yes.
Its compact size, powerful performance, and excellent sound quality make it an outstanding choice for desktop and home stereo applications.