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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
最新の送料の確認方法
1. [カートに入れる] ボタンをクリックします。
2. [カートに入れる] ボタンをクリックします。
3. 国、都道府県、郵便番号を入力します。
4. 最後に、 CALCULATE SHIPPINGをクリックします。
標準配送(≤2KG) 書留航空便、ePacket、または DHL Global Mail による
| 重量（キロ） | 配送コード | 送料（米ドル） |
| 0.1~0.2 | 標準配送 The Post 0.2 |
3 |
| 0.21~0.3 | 標準配送 The Post 0.3 |
4 |
| 0.31~0.4 | 標準配送 The Post 0.4 | 5 |
| 0.41~0.5 | 通常配送 ザ・ポスト 0.5 | 7 |
| 0.51~0.6 | 標準配送 The Post 0.6 | 8 |
| 0.61~0.7 | 標準配送 The Post 0.7 | 11 |
| 0.71~0.8 | 標準配送 The Post 0.8 | 13 |
| 0.81~0.9 | 標準配送 The Post 0.9 | 15 |
| 0.91~1.0 | 標準配送 The Post 1.0 | 17 |
| 1.01~1.0 | 標準配送 The Post 1.1 | 19 |
| 1.11~1.2 | 標準配送 The Post 1.2 | 20 |
| 1.21~1.3 | 標準配送 The Post 1.3 | 21 |
| 1.31~1.4 | 標準配送 The Post 1.4 | 22 |
| 1.41~1.5 | 標準配送 The Post 1.5 | 23 |
| 1.51~1.6 | 標準配送 The Post 1.6 | 24 |
| 1.61~1.7 | 標準配送 The Post 1.7 | 25 |
| 1.71~1.8 | 標準配送 The Post 1.8 | 26 |
| 1.81~1.9 | 標準配送 The Post 1.9 | 27 |
| 1.91~2.0 | 標準配送 The Post 0.8 | 28 |
速達便 --- 特別ルート、 EMS、DHL、UPS、Fedex、または TNT を使用。より迅速な発送とスムーズな取引のために、私たちはその中で運送会社を変更します
| 重量（キロ） | 配送コード | 送料（米ドル） |
| 0~0.5 | エクスプレス配送 L0.5 |
17 |
| 0.51~1 | エクスプレス配送 L1.0 |
20 |
| 1.01~1.5 | エクスプレス配送 L1.5 | 25 |
| 1.51~2 | エクスプレス配送 L2.0 | 30 |
| 2.01~2.5 | エクスプレス配送 L2.5 | 35 |
| 2.51~3 | エクスプレス配送 L3.0 | 38 |
| 3.01~3.5 | エクスプレス配送 L3.5 | 40 |
| 3.51~4 | エクスプレス配送 L4.0 | 42 |
| 4.01~4.5 | エクスプレスシッピング L4.5 | 44 |
| 4.51~5 | エクスプレス配送 L5.0 | 47 |
| 5.01~5.5 | エクスプレス配送 L5.5 | 59 |
| 5.51~6 | エクスプレス配送 L6.0 | 62 |
| 6.01~6.5 | エクスプレス配送 L6.5 | 65 |
| 6.51~7 | エクスプレス配送 L7.0 | 68 |
| 7.01~7.5 | エクスプレス配送 L7.5 | 71 |
| 7.51~8 | エクスプレス配送 L8.0 | 74 |
| 8.01～8.5 | エクスプレス配送 L8.5 | 77 |
| 8.51~9 | エクスプレス配送 L9.0 | 80 |
| 9.01~9.5 | エクスプレス配送 L9.5 | 82 |
| 9.51~10 | エクスプレス配送 L10.0 | 86 |
| 10.01~10.5 | エクスプレス配送 L10.5 | 103 |
| 10.51~11 | エクスプレス配送 L11.0 | 107 |
| 11.01~11.5 | エクスプレス配送 L11.5 | 110 |
| 11.51~12 | エクスプレス配送 L12.0 | 114 |
| 12.01~12.5 | エクスプレス配送 L12.5 | 118 |
| 12.51~13 | エクスプレス配送 L13.0 | 122 |
| 13.01~13.5 | エクスプレス配送 L13.5 | 126 |
| 13.51~14 | エクスプレス配送 L14.0 | 130 |
| 14.01~14.5 | エクスプレス配送 L14.5 | 134 |
| 14.51~15 | エクスプレス配送 L15.0 | 137 |
| 15.01~15.5 | エクスプレス配送 L15.5 | 140 |
| 15.51~16 | エクスプレス配送 L16.0 | 143 |
| 16.01~16.5 | エクスプレス配送 L16.5 | 146 |
| 16.51~17 | エクスプレス配送 L17.0 | 149 |
| 17.01~17.50 | エクスプレス配送 L17.5 | 152 |
| 17.51~18 | エクスプレス配送 L18.0 | 155 |
| 18.01~18.50 | エクスプレス配送 L18.5 | 158 |
| 18.51~19 | エクスプレス配送 L19.0 | 161 |
| 19.01~19.5 | エクスプレス配送 L19.5 | 164 |
| 19.51~20 | エクスプレス配送 L20.0 | 167 |
| 20.01~20.5 | エクスプレス配送 L20.5 | 170 |
| 20.51~21 | エクスプレス配送 L21.0 | 173 |
| 21.01~21.5 | エクスプレス配送 L21.5 | 176 |
| 21.51~22 | エクスプレス配送 L22.0 | 179 |
| 22.01~22.5 | エクスプレス配送 L22.5 | 182 |
| 22.51~23 | エクスプレス配送 L23.0 | 185 |
| 23.01~23.5 | エクスプレス配送 L23.5 | 189 |
| 23.51~24 | エクスプレス配送 L24.0 | 192 |
| 24.01~24.50 | エクスプレス配送 L24.5 | 195 |
| 24.51~25 | エクスプレス配送 L25.0 | 198 |
ノート：
1.この配送料表がチェックアウトに追加されます。配送料は、チェックアウト ページで表示できます。また、表は参考用です。最終的な配送料は、実際のチェックアウトの対象となります。
2.当社が販売する多くの商品の配送料は重量ベースです。そのようなアイテムの重量は、詳細ページで確認できます。当社が使用する運送会社のポリシーを反映するために、すべての重量は次の完全なポンドに切り上げられます。
3.送料についてご不明な点がございましたら、下記の方法でお気軽にお問い合わせください。
電子メール: sales@iwistao.com
Description
IWISTAO 833 Single-Ended Class A Tube Amplifier 1 Piece Split-Chassis Amp 6SN7 Preamp 300B Transformer-Coupled to 833
Model No: WVT-SPCH833
Please note:
1). the lead time for this model is about 3 weeks after the payment verified.
2)And it is sold as one piece, the stereo need 2 pcs, please buy them as two separated orders if need.
The IWISTAO 833 (FU33) amplifier stands as a flagship expression of single-ended Class A triode design, merging uncompromising engineering with the musicality that discerning audiophiles demand.
The Power and Presence of the 833 (FU33)
Originally developed for RF applications, the 833 (FU33) has earned a distinguished reputation in the high-fidelity community. Enthusiasts praise its grand, full-bodied sonic presentation — a sound that is both authoritative and emotionally captivating.
As a directly heated triode, the 833 delivers the unmistakable “tube magic”: warm, textured mids with natural harmonic richness. With its immense power reserves, it effortlessly drives even the most demanding loudspeakers, providing explosive dynamics, expansive staging, and commanding control. Listeners consistently highlight its tonal integrity, three-dimensional imaging, and sheer musical energy.
Inside view
833 vs. 300B – Scale vs. Intimacy
The legendary 300B, revered as the “King of Tubes,” is celebrated for its seductive midrange and delicate microdetail. However, with a typical single-ended output of only ~8 watts, it struggles with low-sensitivity speakers or large-scale music.
By contrast, a single 833 can deliver **tens to over a hundred watts of Class A power**, enabling effortless control of complex symphonic works, pipe organs, or large-scale dynamics — with deep, weighty bass and a vast, lifelike soundstage. While the 833 emphasizes scale, authority, and transparency, the 300B retains an edge in intimacy, imparting a lush sweetness particularly enchanting with vocals and chamber music.
The IWISTAO Approach
Our design combines the best of both worlds. Each channel is housed in its own chassis for maximum isolation and stability. The front end employs **6SN7 driver tubes feeding 300Bs**, which in turn couple through output transformers to drive the mighty 833. Operating at **1750V plate voltage and 100mA current** in pure Class A status, ensuring uncolored, naturally flowing sound.
The sonic result recalls a “giant 2A3”: mids that are saturated and lifelike, highs that extend effortlessly with natural decay and inky-black silence, and bass that digs deep with authority and control. Unlike the more flamboyant character of 300B or 7092 amplifiers, the IWISTAO 833 prioritizes authenticity — offering music that is transparent, powerful, and profoundly moving.
Specifications
1. Output Power: 70W
2. Power Consumption: 420W
3. Weight: about 33kg
4. Dimensions (W × D × H): 350mm × 600mm × 350mm
5. Tube Complement:
- 833 × 1
- 300B × 1
- 5U4G × 1
- 6SN7 × 1
6. Qty: 1 piece 833 tube amplifier
7. Working voltage: AC220V/50~60HZ
8. Accessories: power cord x 1, protection cover x 1
Applications
