3 in 1 Power Supply
To achieve high performance and good sound, all kits should be fed by an adequate power supply. As described in the LM1875 and TDA7293/94 projects the power supply for op amps is critical. High PSRR and low noise is a must.
The board shown bellow combines 3 functions:
- Power chip power supply – provides power supply for TDA7293
- Op amps power supply – ultra-low noise and ripple +/-15.0V
- Speaker delay and DC protection
All you need is an adequate transformer or switching mode power supply.
3 in 1 power supply – $79.99
Low noise power supply and speaker DC protection Kit
Very Low Noise and Ripple +/-15.0V Power Supply – $29.99
Suitable for any Audiophile DIY project requiring ultralow noise and ripple power supply.
The power supply is a perfect much for any application which requires utralow noise and ripple power supply, including but not limited to audiophile preamplifiers, active crossovers, microphone preamplifiers, RIAA preamplifiers, etc.
Specifications:
– minimum input voltage 16-0-16VAC, +/-21VDC
– maximum input voltage 25-0-25VAC, +/-35VDC
– output voltage +/-15V (adjustable from +/-14.5 to +/-15.5V)
– max output current – 150mA (up to 250mA with 5 K/W heatsink)
– maximum RMS output noise (10Hz to 50kHz) – 0.0002% of output voltage
– PSRR (120Hz) – 80dB
