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Product Detail (--- ayanhu81 ebay shop welcome you to buy it ---)
Please note before purchase: This product is only a bare board, not contain other parts, picture only for assembled reference ! Warm Reminder: if you need "Balanced / unbalanced pre-amp Assembled board" , please you buy in : This is the PCB of a very low distortion preamplifier that can accept balanced signal source. Within the board the balanced signal is converted to unbalanced output. 2mm thick double-sided gold-plated PCB.
The circuit make uses of a famous balanced line receiver SSM2141. The chip can offer a distortion as low as 0.002% across the whole audio frequency band. This is followed by another opamp stage.The gain is also adjustable so as to complete a preamplifier function .
Besides being a balanced to unbalanced conversion amplifier, this board can also be used as a summing amplifier. One of the application is a low distortion two-input audio mixer. Another application is to sum the left and right channel signal to form a mono signal . Many audiophiles prefer the sound of mono to stereo for the perceptional purity of mono signal. This board would perfectly fit such summing function.
When second stage (the opamp) can be inserted with opamp of one's preference. When a good driving capability opmp is used, the amplifier can even be used as a balanced input headphone amplifier !!(--- ayanhu81 ebay shop welcome you to buy it ---)
Board for the two-channel design, Supply voltage :DC +/-9v to +/-15V. (recommended ± 12V)
This line is Sonic Frantiers prototype stage before, so we can not provide the wiring diagram, only element table, allows buyers to purchase their own. Against the surface of the element number plate installation, can work properly.
 Balanced input signal, output unbalanced signals suitable preamp output signal is balanced, but after class is not balanced signal input system.
For used car audio system, be sure to note where this board can only access the CD input low output (RCA terminal), can not take the CD high output power amplifier (speaker terminals), otherwise it will damage the board.
PCB inventory components you need to use :( buyers need to buy their own)
Resistance: 270Ωx2,1Kx2,2K4x2,100Kx2
Capacitance: 0.1uFx8,33uFBPx4,100uFx2
NE5534 x2
SSM2141 x2
5.08mm pin pitch 3P terminals x4 SSM2141 and SSM2142 differential transmitter used in tandem, can build a complete, reliable solution for driving and receiving audio signal applied on long cables. Assembly diagram reference：(--- ayanhu81 ebay shop welcome you to buy it ---)
 (--- ayanhu81 ebay shop welcome you to buy it ---)
Package Included:
1x Balanced to unbalanced stereo pre-amplifier headphone amp Bare PCB Feedback> We maintain hightest buyer ratings  >  Positive Feedback will be much appreciated from you.> Any dissatisfaction, please contact us immediately! > Please do not leave neutral  or negative  feedback before we help you out.Payment> We accept PayPal only.  Shipping
> We Ship to Worldwide, except Hong Kong, Nigeria.....
Returns> Defect: We will fully refund or send you a new replacement,please contact and return within 14 days. Contact us> If have any question, Please contact us by ebay message before leaving neutral, negative feedback or open any dispute, we will reply within 24hours, ensure that help you solve the problem, make you satisfied. > Our Working-time From 8:30 AM to 21:30 PM(GMT+08). |
