19 In stock
HIFI Preamplifier Stereo Adopt AD797 High-end Customized MBL6010D Black Gold Edition Top-level Audio System Preamp
Model NO: WHFI-PA6010D
6010 D adopt dual power supply design, the amplifier circuit and control circuit is separately. Electronic circuits for plug-in facilitate future upgrades in addition, output board also use new high-performance amplifier OP, that grade is improved significantly. Each group Output section is driven by a separate output of each buffer stage to enhance driving force, and able to avoid mutual interference. Main circuit of the pre-amplifier is consistent with the original unit parts, materials used in the unit as close to the original material respects with the original unit. MBL6010 D preamplifier has been adjusted to the optimum state, and is available after power on.
Adopt a famous op amp AD797 instead of NE5534 of the original unit, and coupled straightly, those AD797 op amps is completely superior characteristics to maximize.
1. AD797 is extremely excellent op amp, and the design for circuit of preamplifier optimized for it.
2. MBL circuit focused on the details of power supply highly, each decoupling circuit is made of eight different size capacitors alone, namely 220UF, 104 (or 224), 103, and 102. Enable weak audio with different frequencies have been taken full advantage.
3. Weak audio signal play well with different frequencies completely, also is contributed to six adjustable precision resistors to lead to the unit achieving whole DC, without any isolation capacitors.
4. Each separated circuit has a separated ground wire. Eliminate grounding together randomly, so as not to affect the degree of separation.
Main components selection
1. Original ALPS27 type 10K potentiometer
2. Two pairs of gold-plated CMC socket for input and output
3. New and original Op amp AD797 x 4, with 8 pins double row silver-plated sockets.
4. Dual 18V 30WR transformer.
5. Philip s J-level accuracy CBB capacitors.
6. Resistors are used for true accuracy of 0.1% metal film resistors.
7. Electrolytic capacitors have NOVER, Rubycon, ELNA other famous capacitance.
8. Six precision adjustable resistors.
1. Magnification Gain of original unit is over 10 times, if that is too large, you can change it to 3-5 times, the first level of feedback resistor is 220 ohms now, you can change it to 470 - 1K ohms.
2. Power supply adjusted to ± 17V (or ± 15V), and the 4th pin for op amps -17V, the 7th pin for +17 V.
3. After adjusted the power supply, you can insert a single op amp separately op, the rest is not inserted, adjust corresponding adjustable output (op amp the 6th pin) to 0mV nearly.
1. Input terminal: RCA × 1
2. Output terminals: RCA × 1
3. Power consumption: 30 watts
4. Input Sensitivity: 350mV
5. Input impedance: 47k ohms
6. Frequency response: DC-600kHz
7. Min. Distortion: <0.0006%
8. SNR:> 102dB
9. Dimensions (W * H * D): 280mm * 52mm * 175mm
10. Net Weight: 3kg
Power cord x 1
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, 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).
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.