Nobsound Mini HiFi Tube Preamp: Class A Stereo Audio Preamplifier with Bass & Treble Control for Home Stereo Amplifier, Active Speaker, Desktop Audio Systems (TUBE-T4C)
$117.97
- $5.95 shipping from United States View details
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- Warm Analog Sound Enhancement: Class A vacuum tube design filters out digital harshness and breathes new life into your music. Enjoy richer warmth, fuller depth, and a wider soundstage from all your audio sources.
- Precise Bass & Treble Control: Fine-tune your audio to perfection with dedicated bass and treble knobs. Easily adjust low and high frequencies to match your speakers or headphones and personal taste, getting the ideal sound balance for any genre.
- Swappable Tube Personalization: Customize your sound signature by rolling tubes. The TUBE-T4C’s pluggable 7-pin tube sockets support 6J5 (default), 6J1, 5654, 6AK5, EF95 and other compatible tubes – a simple swap lets you explore different tonal characters and find your favorite.
- Simple Connectivity & Setup: Features standard stereo RCA input and output for broad compatibility. Connect your PC, phone, tablet, CD player or streamer to the preamp, then link the output to any power amp or active (powered) speakers. Instantly upgrade your existing home audio or desktop setup with minimal effort.
- Compact and Durable Design: Mini sized at only 3.07″×3.23″×1.26″, this tube preamp fits neatly on any desk or shelf without clutter. The solid build and low-noise circuit (100 dB SNR) ensure a clean signal and silent background, making it a perfect Hi-Fi upgrade for space-conscious audiophiles.
- Warm Analog Sound Enhancement: Class A vacuum tube design filters out digital harshness and breathes new life into your music. Enjoy richer warmth, fuller depth, and a wider soundstage from all your audio sources.
- Precise Bass & Treble Control: Fine-tune your audio to perfection with dedicated bass and treble knobs. Easily adjust low and high frequencies to match your speakers or headphones and personal taste, getting the ideal sound balance for any genre.
- Swappable Tube Personalization: Customize your sound signature by rolling tubes. The TUBE-T4C’s pluggable 7-pin tube sockets support 6J5 (default), 6J1, 5654, 6AK5, EF95 and other compatible tubes – a simple swap lets you explore different tonal characters and find your favorite.
- Simple Connectivity & Setup: Features standard stereo RCA input and output for broad compatibility. Connect your PC, phone, tablet, CD player or streamer to the preamp, then link the output to any power amp or active (powered) speakers. Instantly upgrade your existing home audio or desktop setup with minimal effort.
- Compact and Durable Design: Mini sized at only 3.07″×3.23″×1.26″, this tube preamp fits neatly on any desk or shelf without clutter. The solid build and low-noise circuit (100 dB SNR) ensure a clean signal and silent background, making it a perfect Hi-Fi upgrade for space-conscious audiophiles.
1. The TUBE-T4C is a preamplifier and must be paired with a power amplifier or active speakers. It cannot directly connect passive speakers.
2. Please use the supplied DC 5V/2A power adapter to ensure optimal performance of the TUBE-T4C. If using other power supply, make sure it provides at least 2A current. Otherwise, the TUBE-T4C may not function properly.
3. TUBE-T4C adopts pluggable tube socket, default 6J5 vacuum tubes, can be replaced by 6J1, 5654, 6AK5, EF95 etc. For a full list of compatible tube models, please refer to the user manual.
Parameters
Brand: Nobsound
Model: TUBE-T4C
Audio input: Stereo RCA
Audio output: Stereo RCA
Frequency response: 20-30KHz
SNR: 100dB
Voltage amplification: 2.5 times
Input voltage: DC 5V/≥ 2A (5.5*2.5mm)
Dimensions (W*D*H): 78*82*32mm / 3.07*3.23*1.26in
Package dimensions (W*D*H): 135*85*90mm / 5.31*3.34*3.54in
Net weight: 230g / 0.51lb
Package weight: 400g / 0.88lb
Packing list
* 1* TUBE-T4C Preamp
* 2* 6J5 Tubes
* 1* DC 5V Power Adapter
* 1* User Manual
Processing Time
- We process and ship orders Monday through Friday, excluding holidays.
- Most orders are processed within 1–3 business days, depending on product availability.
- Processing time does not include delivery time, which varies based on your location and the product’s shipping origin.
Shipping Coverage
We currently ship to addresses within the United States only.
Products may ship from:
- Our U.S. warehouses, or
- Our international fulfillment centers (including Korea, Japan, China, Australia, Mexico, Canada, the United Kingdom, and the EU).
Each product page clearly displays the “Ships From” location before checkout.
Shipping Methods & Estimated Delivery
| Shipping Method | Estimated Delivery | Cost |
|---|---|---|
| Free Shipping (US) | 5–10 business days | Free, available on eligible items |
| Standard Shipping (US to US by Item) | 5–10 business days | $5.95 for the first item, $3.00 each additional |
| Standard Shipping (From US Warehouse by Weight) | 3–7 business days | Starts at $5.95, increasing by $2 for every additional 4 oz (0.25 lb) up to 1 lb, then by $4 for each additional pound beyond 1 lb. |
| Extended Delivery (Ships from Overseas Warehouse) | 10–20 business days | $14.50 for the first item, $2.00 each additional |
Shipping costs vary by product weight, quantity and origin. Exact rates and delivery estimates are displayed on each product page and confirmed during checkout.
Free Shipping
We offer free standard shipping on select products or during promotional periods. Availability of free shipping will be displayed on the product page and at checkout.
Carriers
We primarily use USPS and UPS for U.S. deliveries. Items shipped from international warehouses may be handled by partner carriers depending on the country of origin.
Import Duties & Taxes
All import duties and taxes for goods imported into the United States are included in the product price. There are no hidden fees or additional charges at checkout.
Tracking & Notifications
Every order is fully trackable. You will receive a tracking number via email once your order ships. If your order ships in multiple packages, each package will have its own tracking number. If you don’t receive a shipping confirmation immediately, your order is still being processed and will arrive within the estimated timeframe shown at checkout.
You can track your shipment anytime using the Track Your Order page on our website.
Order Changes & Cancellations
If you need to modify or cancel an order, please contact our customer support team as soon as possible. Orders can only be canceled before they ship. Once shipped, cancellations are not possible, but you may request a return after the item is delivered.
Contact: support@ibspot.com
Item Not Received
If your tracking number shows “Delivered” but you haven’t received your package:
- Check with your local USPS or UPS office.
- Confirm that the shipping address provided was correct.
- If the issue remains unresolved, contact support@ibspot.com for assistance.
Damaged or Lost Parcels
If your package arrives damaged or fails to arrive, please contact us immediately. For deliveries to P.O. boxes, ibspot is not responsible for damage caused by weather, temperature, or theft.
Customer Support
For any questions about shipping, tracking, or delivery, our customer support team is here to help.
Email: support@ibspot.com
We’re always happy to help.
Please read our policy carefully before making a purchase.
We aim to ensure every customer has a smooth and transparent experience with ibspot.com.
Order Cancellation Policy
Customers may request to cancel an order before it has been shipped.
Once the package has been shipped, cancellations are no longer possible; however, you may still request a return after receiving your order.
How to Request a Cancellation
You can contact us through:
- Email: support@ibspot.com
- Contact Form: Submit a request through our Contact Us page
Please submit your cancellation request as soon as possible after placing the order to allow us to process it before shipment.
Return Policy
We accept returns for most items within 30 days of delivery for a full refund.
To be eligible for a return:
- The item must be unused, in the same condition as received, and in its original packaging.
- A tracking number must be provided to confirm the return shipment.
Non-Returnable Items
Certain products cannot be returned, including:
- Perishable goods (for example, food, flowers, newspapers, magazines)
- Intimate or sanitary goods
- Hazardous materials or flammable liquids/gases
- Gift cards
- Downloadable software
- Some health and personal care items
Partial Refunds (If Applicable)
Partial refunds may be granted in specific situations, such as:
- Books with obvious signs of use
- Opened CDs, DVDs, software, or vinyl records
- Items not in their original condition, damaged, or missing parts not due to our error
- Items returned more than 30 days after delivery
How to Return an Item
To initiate a return, please contact us at support@ibspot.com with your order number and details about the product you wish to return.
Our team will provide you with return instructions and a prepaid return label.
Shipping Cost for Returns
Please contact us before returning any item.
We will provide a free return shipping label.
If a return is sent back without prior contact or without our provided label, we cannot be held responsible for return shipping costs.
For items valued over $75, we recommend using a trackable shipping service or purchasing shipping insurance.
We cannot guarantee that we will receive your returned item if shipped independently.
Refund Processing
Once your return is received and inspected:
- In-store returns are refunded to the original form of payment or issued as a gift card.
- Mail-in returns using our prepaid label are refunded to the original payment method within 3–5 business days after we receive your return.
Please allow:
- 5–7 business days for the return to reach our Returns Center.
- An additional 3–10 business days for your bank to post the refund to your account.
Damages, Issues & Claims
Please inspect your order immediately upon receipt.
If you receive a defective, damaged, or incorrect item, contact us right away at support@ibspot.com.
We’ll evaluate the issue promptly and make it right.
Product Claims
Before purchasing, please review product details carefully.
If there is a problem with your order upon arrival, visit our Support Center or contact us directly to arrange return shipping or replacement.
Exchanges
We do not process direct exchanges.
The fastest way to get what you need is to return the original item and place a new order once your return is accepted.
Return Address
IBSPOT Return Center
15 Sawmill Ln
Dover Plains, NY 12522
United States
Customer Support
Our support team is available 24/7 to assist with cancellations, returns, or general inquiries.
Email: support@ibspot.com
Contact Form: Contact Us page
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