Assembled Marantz MA-9S2 250W with DC Servo Amplifier Board
Resistance selection Rings metal resistance, the main circuit employs a precision of ± 1% metal film resistors rings, ensure the machine a good signal to noise ratio.
1.6mm thick sheet using double-sided PCB, 2.0 oz copper thickness, HASL whole process to ensure that the size of the current through the good performance. PCB-class quality.
The entire circuit board trace layout is quite strict and reasonable, the overall PCB traces using a little grounding. The amplifier board is stable and reliable, high output power; beautiful mellow sound, open sound field. Dimensional sense of strong, solid and strong low-frequency steady, very good signal to noise ratio, wide dynamic range; the details clear, excellent transient response, playing all kinds of music are comfortable with, in the home of the playback environment has a very good performance.
Parameters:
PCB size: 83X167MM
Supply voltage: DC DC dual 30-50V,
Recommended +/- 45V,
Dual 32V transformer rectifier to + -45V
Power output: 250 watts (total harmonic distortion THD + N <0.1%),
DC + -50V, 4 ohm load was measured;
Debugging:
Adjust VR1 (1K precision adjustable resistors) quiescent current makes about 100MA, VR1 counterclockwise quiescent current becomes large, clockwise is reduced!
Package:
Specifications:
Using original NJW0281 / NJW0302 and 2SA1930 / 2SC5171.Resistance selection Rings metal resistance, the main circuit employs a precision of ± 1% metal film resistors rings, ensure the machine a good signal to noise ratio.
1.6mm thick sheet using double-sided PCB, 2.0 oz copper thickness, HASL whole process to ensure that the size of the current through the good performance. PCB-class quality.
The entire circuit board trace layout is quite strict and reasonable, the overall PCB traces using a little grounding. The amplifier board is stable and reliable, high output power; beautiful mellow sound, open sound field. Dimensional sense of strong, solid and strong low-frequency steady, very good signal to noise ratio, wide dynamic range; the details clear, excellent transient response, playing all kinds of music are comfortable with, in the home of the playback environment has a very good performance.
Parameters:
PCB size: 83X167MM
Supply voltage: DC DC dual 30-50V,
Recommended +/- 45V,
Dual 32V transformer rectifier to + -45V
Power output: 250 watts (total harmonic distortion THD + N <0.1%),
DC + -50V, 4 ohm load was measured;
Debugging:
Adjust VR1 (1K precision adjustable resistors) quiescent current makes about 100MA, VR1 counterclockwise quiescent current becomes large, clockwise is reduced!
Package:
1pc Assembled Marantz MA-9S2 with DC servo Amplifier Board 250W
Payment Method: PayPal preferred
Shippment:
International shipping requires complicated shipping procedures (such as both countries customs, transit stations etc.), also will be affected by many factors, such as holidays, weather conditions etc, If you have not received your shipment after long time days from payment, please contact us.
Returns & Replacements & Repair
We accept returns & replacements within 14 days from the day the customer receive the products, please make first contact within 14 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, thanks!
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.
Shippment:
International shipping requires complicated shipping procedures (such as both countries customs, transit stations etc.), also will be affected by many factors, such as holidays, weather conditions etc, If you have not received your shipment after long time days from payment, please contact us.
Returns & Replacements & Repair
We accept returns & replacements within 14 days from the day the customer receive the products, please make first contact within 14 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, thanks!
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.
