Why don't you use Splitted Phono Amplifier Stage?
What is an advantage for Splitted Phono Amplifier Stage? It can maximize to eliminate the mutual interference between phono amplifier and power supply.
So we designed and manufactured it, that is a well-designed HI-END vinyl phono stage that adopt a splitted power supply,although its appearance is not luxurious, simple and elegant, it has itself style. Most of the RC components for the phono amplifier used are imported one, the circuit layout is reasonable with sophisticated technology and process, double-sided fiberglass PCB, power supply board is a signal sided, and its multiple-stage amplification gains and impedance matched are adjustable.
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MM/MC Phono Amplifier Stage Splitted Power Supply LME49990MA + Transistor / FET |
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MM/MC Phono Amplifier Stage Splitted Power Supply LME49990MA + Transistor / FET |
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Back View -- MM/MC Phono Amplifier Stage Splitted Power Supply LME49990MA + Transistor / FET |
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Inside View -- MM/MC Phono Amplifier Stage Splitted Power Supply LME49990MA + Transistor / FETFeatures
1. Real low noise;
2. Perfect combined high-performance and low-noise op amps with transistors, it has outstanding performance at high frequency extension, dynamic, great sound field;
3. Used a lot of imported high-quality HIFI components.
4. Dual application to MM / MC, it has 8-speed adjustable gains and input impedance
5. The first stage used American National's reference op amp LME49990MA, and the second stage is transistor / FET output circuit, which is low output impedance and strong driving force.
6. Splited designing, display flexibility and small size.
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Production Specifications
1. LME49990MA as the first and transistor / FET output circuit as the second stage.
2. Has 8-speed adjustable gains and input impedance
3. Copper gold-plated RCA input and output jacks
4. Seperated power supply.
5. Attenuated MM / MC phono amplifier.
6. Input voltage: AC 220V / 50Hz
7. Dimensions (L * W * D): 106 mm * 40 mm * 85 mm ( for 1 piece)
8. Weight: 1.95 KG
9. Accessories
Power adaptor x 1
Power connection cable x 1
More details, please visit http://www.aliexpress.com/store/product/MM-MC-Phono-Amplifier-Stage-Splitted-Power-Supply-LME49990MA-Transistor-FET-for-LP-Phono-Vinyl-Amp/725205_32524994878.html
Using Caution
for Phono Amplifier (Model No: WMMC-PA2011)
This
MC/MM phono amplifier is made of high quality imported components and parts,
and tuned finely, as well as aged 10 hours above. After connecting the cables
as the marked on the panels, it will work.
1.
Built-in the switch for changing MC/MM, MC
gain and impedance input control inside, please set up it as your requirements
as below. (it can be set up when it works).
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Switch combination of input impedance
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1
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2
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3
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Gain
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4
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5
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6
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Impedance
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OFF
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OFF
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OFF
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100(MM)
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OFF
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OFF
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OFF
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47K
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OFF
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ON
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OFF
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500
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OFF
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OFF
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ON
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150
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ON
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OFF
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OFF
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800
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OFF
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ON
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OFF
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100
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ON
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ON
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OFF
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1000
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OFF
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ON
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ON
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60
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OFF
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OFF
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ON
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1200
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ON
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OFF
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OFF
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30
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OFF
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ON
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ON
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1500
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ON
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OFF
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ON
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25
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ON
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OFF
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ON
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1800
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ON
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ON
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OFF
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23
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ON
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ON
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ON
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2000
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ON
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ON
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ON
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20
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Note: the unit had been set up as MM default when
shipment.
Remark:
1). L / R channel will be set up with same when you set up them.
2). When you set up the gain and the impedance according your
requirements, please open the top cover of the amplifier ( unscrew 4 pcs screws
on the front and back panel, then you take the cover out).
2.
GND wire terminal of phono amplifier must be
connected with the ground wire of phono player, which
is shielded ground wire of phono for anti-interference, eliminating low-frequency
noise. After the ground wire of phono player connected with GND wire terminal
of phono amplifier as figure below, then connected audio cables of input and
output between them.
3.
The phono player and phono amplifier are
vulnerable to interference, so they need to try to stay away from sources of
interference, such as amplifiers and other fields are generated with a
transformer and objects.
