3100 - Stereo Preamplifier with Tone Controls

Hi-fi quality stereo preamplifier board with volume, balance, bass and treble tone controls. It provides very pleasing performance and makes a useful addition to any of our audio power amplifier kits.  RCA jacks for audio inputs.

It is easy to construct due to the use of a special IC, the Philips TDA1524A. This contains all the circuitry required to provide up to 20 dB of voltage gain, ±15 dB of bass and treble control, channel balance, and a switchable loudness contour.

Because it uses voltage control, linear single gang pots can be used , which lowers the costs and reduces tracking errors. It also allows for control by switches or microprocessor if desired.

• Simple construction
• Few external components
• Low noise and distortion
• Switchable loudness
• Will drive most power amps

Technical Specifications
Input Power:	12Vdc battery or 15-18Vdc main adaptor (Order Code PSU121). See product documentation for full details.
Current consumption	50mA min.
Maximum output:	> 3V RMS
Maximum input:	>300 mV, G = 20 dB >3V RMS, G = 0dB
Input Z:	> 10K ohm
Output Z:	< 300 ohm
Frequency resp.:	< 10 Hz to > 50 kHz + / ±1 dB
THD at 1kHz:	< 0.1 % at 1V output
S/N ratio:	> 80 dB, G = 0 dB
Bass boost/cut:	~ 15 dB at 50 Hz
Treble boost/cut:	~ 15 dB at 15 kHz
Board Dimensions:	66 x 103mm
Board Connections	2.5mm DC Socket & RCA connectors
Control Knob	KB0561
Product Format	SELF-ASSEMBLY Electronic Kit (KT ) or PRE-ASSEMBLED Electronic Module (AS) more
Documentation	User Manual TDA1524A IC Data Sheet