1 Pair 2SD718 100W Reference British Classic Amplifier Two-Channel QUAD707
Parameter：
Supply voltage range DC positive and negative DC +- (25V ~ 55V), recommended voltage DC +- 45V
Output power 125W 8R, 250W 4R.
Frequency response APSYS 2 test data : 20HZ -0DB, 10HZ -0.3DB, 10K HZ -0.1DB, 20KHZ -0.3DB
SR 25V/US oscilloscope measurement.
THD+N < 0.01%
PCB size 50MM X 145MM.
Magnification (Gain) = 51.5X
Output stage quiescent current = 0 MA
Mono quiescent current ~ approx. 100 MA
Recommended heat sink > 500 g per channel (at +- 45V)
Using original op-amp TLC271 high performance OP.
Output transistors using original Huawei Semiconductor 2SD718 power tubes (180V, 10A, 100W) 6 per channel.
Oscilloscope test data:
APSYS 2 test data:
Frequency response: 20HZ -0DB, 10HZ -0.3DB, 10K HZ -0.1DB, 20KHZ -0.3DB
THD+N < 0.01%
Power Tube Mounting Hole Reference Diagram：
Package:
One Pair QUAD707 Dual Channels Audio Power Amplifier Board
Payment Method: PayPal preferred
Shippment:
1.We
provide free shipping to international via China Post Airmail . We can also ship by TNT/EMS/DHL/FedEx for alternative shipping
method for corresponding fees. Please let us know before payment if you
need split shipment.
2.International shipping requires complicated
shipping procedures, If you have not received your shipment within 30 days
from payment, please contact us.
Returns & Replacements & Repair:
We
accept returns & replacements within 30 days from the day the
customer receive the products, please make first contact within 30 days
from receiving the order. Products should be returned in original
condition. As a benefit to our customers, we also provide repair within 3
months from the day when this item is shipped out, after repair is
done, we will send you the item, but the customer should pay both
shipping ways.
Feedback:
1)Your
Feedback is really important to us, please take a few seconds to leave
great feedback if you are satisfied with our product or service, thank
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3)
Please contact us before leaving neutral(3 stars) or negative(1-2
stars) feedback.We will try our best to solve the problem and leave you a
happy shopping mood here. Thank you!
Payment Method: PayPal preferred
Shippment:
1.We
provide free shipping to international via China Post Airmail . We can also ship by TNT/EMS/DHL/FedEx for alternative shipping
method for corresponding fees. Please let us know before payment if you
need split shipment.
2.International shipping requires complicated
shipping procedures, If you have not received your shipment within 30 days
from payment, please contact us.
Returns & Replacements & Repair:
We
accept returns & replacements within 30 days from the day the
customer receive the products, please make first contact within 30 days
from receiving the order. Products should be returned in original
condition. As a benefit to our customers, we also provide repair within 3
months from the day when this item is shipped out, after repair is
done, we will send you the item, but the customer should pay both
shipping ways.
Feedback:
1)Your
Feedback is really important to us, please take a few seconds to leave
great feedback if you are satisfied with our product or service, thank
you so much!
2)We always offer the lowest price for best goods and service to you.
3)
Please contact us before leaving neutral(3 stars) or negative(1-2
stars) feedback.We will try our best to solve the problem and leave you a
happy shopping mood here. Thank you!
Shippment:
1.We provide free shipping to international via China Post Airmail . We can also ship by TNT/EMS/DHL/FedEx for alternative shipping method for corresponding fees. Please let us know before payment if you need split shipment.
2.International shipping requires complicated shipping procedures, If you have not received your shipment within 30 days from payment, please contact us.
Returns & Replacements & Repair:
We accept returns & replacements within 30 days from the day the customer receive the products, please make first contact within 30 days from receiving the order. Products should be returned in original condition. As a benefit to our customers, we also provide repair within 3 months from the day when this item is shipped out, after repair is done, we will send you the item, but the customer should pay both shipping ways.
Feedback:
1)Your Feedback is really important to us, please take a few seconds to leave great feedback if you are satisfied with our product or service, thank you so much!
2)We always offer the lowest price for best goods and service to you.
3) Please contact us before leaving neutral(3 stars) or negative(1-2 stars) feedback.We will try our best to solve the problem and leave you a happy shopping mood here. Thank you!
