Assembled Fully Separation HIFI Tone Preamp Board Base on UK NAD Preamplifier
Note: this list is assemble board ，have tested it well ！
Reference to the UK NAD3020 amplifier tone part, using double-sided thickened gold-plated PCB (substrate 2MM, copper foil thickness 75U, not 50U comparable) design, hifi components assembled, the circuit using single-ended amplification, High magnification (HFE300 +): 2SA992 / 2SC1845 audio dedicated pipe. The latter two pairs of A1145 / C2705 audio dedicated to the tube, the regulator circuit using a new LM317 / 337 high-precision low-noise regulator IC, a new revision to upgrade ELNA blue robe electrolysis, Taiwan potentiometer. The biggest feature of this tone is to adjust the high and low frequency, IF almost no change, low-frequency stretch! High frequency slim not harsh! Sound mellow is very nice! The effect is not comparable to the op amp pitch.
High bass adjustment range: bass + -15DB, treble + -10DB
Potentiometer distance from left to right: 40MM, 58MM
Size: 138 * 81MM
Voltage: AC: 24V - 0V - 24V
Package include: NAD preamp board X 1
Note: this list is assemble board ，have tested it well ！
Reference to the UK NAD3020 amplifier tone part, using double-sided thickened gold-plated PCB (substrate 2MM, copper foil thickness 75U, not 50U comparable) design, hifi components assembled, the circuit using single-ended amplification, High magnification (HFE300 +): 2SA992 / 2SC1845 audio dedicated pipe. The latter two pairs of A1145 / C2705 audio dedicated to the tube, the regulator circuit using a new LM317 / 337 high-precision low-noise regulator IC, a new revision to upgrade ELNA blue robe electrolysis, Taiwan potentiometer. The biggest feature of this tone is to adjust the high and low frequency, IF almost no change, low-frequency stretch! High frequency slim not harsh! Sound mellow is very nice! The effect is not comparable to the op amp pitch.
High bass adjustment range: bass + -15DB, treble + -10DB
Potentiometer distance from left to right: 40MM, 58MM
Size: 138 * 81MM
Voltage: AC: 24V - 0V - 24V
Package include: NAD preamp board X 1
Shipping time:
Default send by airmail,about 25-40 business days can arrive most of europe countries, Russia, Brazil,Africa.Ukraine and some other remote countries will need some more days.
If you need it urgently,also can contact us for adding money using a faster courier(EMS,DHL,UPS or courier you designated)
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Return & Exchange:
>> Some items return is accepted within 7 days after the buyer's receiving the item.(please see the detail describe)[In case of DOA (Dead on Arrival), please report within 3 days
>> Returned item has to be new, unworn and in its original condition.
>> After getting the returned item, we will refund the customer at the item's price ( excluding the shipping costs to and from )
>> After getting the returned item, we will refund the customer at the item's price ( excluding the shipping costs to and from )