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IWISTAO HIFI Preamplifier Tone Adjustment Bass Tremble Middle OPA2604 LME49720 Whole Aluminum Casing Class A Power Standard VersionModel No: WHFTC-PA3008
This preamplifier has tone control functions and adopts class A power, sound extremely delicate, slender high-frequency, low frequency plump and elastic, if use top op amp IC like as OPA2604 or LME49720, it will achieve perfect sound. Specially, it used a R-type audio dedicated transformer. And it has direct access function; you can skip tone adjustment to achieve original sound completely.
When audio sourcing record, speaker unit, placing the device is not necessarily perfect, and if your preamplifier adopt pure straight, it may not be able to meet the demand. At this moment, add tone adjustment function is very important. If you no extra power supply equipment, passive preamp tone is preferred, which can enhance the effect of high and low frequency is obvious.
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R-type audio dedicated transformer
(Note: the unit adopt OPA2604 & LME49720NA instead of 2 metal sealed LME49720 of the photo above for standard version)
We had tried some solutions for this tone preamplifier. Ultimately, satisfied solution is both positive and negative voltage used the class A power supply with shunt regulator, and tone control section of high, middle, low frequency adopt negative feedback circuit, which has a natural tone and sound as delicate, pure and clear, rich layering; high frequency slim, sleek, sweet sounds and other characteristics; Also the unit has very quiet background sound.
Used with high-end components and parts, like as Phi lips’ capacitor, Class A Power adopt HIFI transistors for BC139, BD140 plus TL431, Germany WIMA ERO capacitors, Sie mens and other high capacitors, high speed rectifier, copper pins resistance…, to ensure high quality product.
OPA2604 is responsible for the first stage gain amplification
LME49720NA responsible for tone control
1. POWER: Power switch (up-- on, down – Off)
2. VOLUME: Volume Control
3. BASS: bass adjustment
4. MID: Middle adjustment
5. TREBLE: Treble adjustment (treble knob is turned to the end of left is direct access function)
1. Whole aluminum casing
2. Standard version: OPA2604AP x1 and LME49720NA x1 each one
3. With direct access functions and three band tone adjustment (Tremble, middle, bass adjustment)
4. Dimensions (W * H * D): 200mm * 45mm * 191mm
5. Weight: 2KG
Power cord X 1
AD827 op amp need match with 10K potentiometers if you insect AD827. Other op amp match 100K potentiometers is OK.
我想查查彩票开奖结果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).
我想查查彩票开奖结果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.
我想查查彩票开奖结果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.
我想查查彩票开奖结果 A. Standard Shipping(≤2KG): The Post Registered Air Mail, ePacket 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
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).
我想查查彩票开奖结果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.
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.