NOTE: This is a finished board, welded debugging OK.
PCB Size: 160mm*110mm
Works Voltage: Dual AC 12 – 16V
1, Power Transistors in parallel to enhance the driving force control, Enhance the driving force control, a broader sound field; effective solution to the original A1 ircuit romote A-K-G, S-ennheiser headphones IF weak, the problem of poor control, to enhance the effect is very obvious.
2, 300MV headphones dedicated protection circuit, A1 Queen ST 33078 N dual op amp, ST DB139 BD140 power output tube.
3, Omron power relay, Than small signal relay have greater contact with copper, lower signal loss.
4, For the op-amp separately regulated power AMP, separating degree of ascension.
5, Optimized ground treatment, the higher SNR.
• Effective Vp-p 23.47
Frequency response, 20 HZ-20 KHZ (+ 0.01, 0.09),
signal-to-noise ratio:-90 DB or below,
the dynamic response, more than 91 DB
• total harmonic distortion (THD) : < 0.007%
• intermodulation distortion: < 0.007%
• stereo separating degree: > 88 DB (1 KHZ)
• suitable 32-600ohm load.
Original ST33078N dual op amp, STDB139-140 power transistor.
PHI FK Series main smoothing capacitor
Japan ALPS 27 type Potentiometer.
1/4W 1% precision metal film resistors
AUDIOPHILE MKP 4U7 400V 3% precision capacitance
Omron G2R – 2 12V Relay 700MV Protection circuit,7 seconds delay connect function.
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|Shipping Company||Shipping Cost||Estimated Delivery Time|
|3 - 7 days|
|3 - 7 days|
|5 - 14 days|
|Post Air Mail||Free Shipping||15 - 45 days|
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N.B.: If the seller provides the "Longer Protection" service on this product, you may ask for refund up to 15 days after order completion.
|Seller Service||On-time DeliveryIf you do not receive your purchase within 60 days, you can ask for a full refund before order completion (when you click "Confirm Order Received" or exceed confirmation timeframe).|
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