Parallel-86 (Last Chance to Buy)


120 W composite chip amplifier achieving 0.00020 % THD.


Product Description

Do note that the LM4780 IC used in this project has been discontinued by Texas Instruments, thus, it is getting harder to source. Newark/Farnell and RS currently hold all available distributor stock. Due to this fact, this will be your LAST CHANCE to purchase Parallel-86 boards. All parts except the LM4780 are currently in stock at Mouser.

Key features of the Parallel-86:

  • Ultra-low 0.00012 % THD (1 W, 8 Ω, 1 kHz).
  • Ultra-low 0.00020 % THD (55 W, 8 Ω, 1 kHz).
  • Ultra-low 0.00043 % THD+N (55 W, 8 Ω, 1 kHz).
  • 60 W output power into 8 Ω.
  • 120 W output power into 4 Ω.
  • Easily bridged for output powers exceeding 200 W (8 Ω).
  • Ideally suited for high-power amplification.
  • Differential input with nearly 90 dB CMRR eliminates hum and ground loop issues.
  • Phenomenal power supply rejection ensures consistent, high performance even using unregulated power supplies.
  • Elaborate use of planes and copper pours to maximize circuit performance by minimizing supply and ground impedances.
  • Low-inductance signal ground connects to power ground at one point only for maximum performance.
  • On-board Zobel and Thiele networks for maximum stability even with capacitive loads.
  • On-board EMI/RFI input filter and ESD protection.
  • On-board low noise voltage regulators for the driver op-amp and DC servo.
  • Power and output terminal blocks accept wire sizes up to AWG 10 (5.2 mm2).
  • All leaded. Easy to solder. 98 × 85 mm board footprint.
  • Bill-of-materials includes a Mouser Electronics Project Link as well as Digikey part numbers.

More information on the Parallel-86 is available on the Parallel-86 Support page.

Additional Information

Board Option

Unpopulated Board + LM4780 IC, Unpopulated Board