X-Altra MC/MM Phono EQ Amplifier
in Complete products, Preamplifiers, Vinyl preamps
Featured in a two-part article in the influential professional audio publication audioXpress (February and March 2021), this phono preamplifier offers the lowest noise of any MC amplifier available. At just 232 pico Volts per root Hertz, the noise performance is at the theoretical limit of what is possible for the given operating parameters. Typically, the […]
X-Altra Mini II ‘Classic’: High-End Preamplifier Manual Control Preamplifier
in Preamplifiers
This PCB set is to build a full X-Altra Mini II ‘Classic’ which is the manual control version of the preamp – JFET discrete line amp unbalanced output, aux unbalanced output, 2 left and right balanced outputs plus a buffered record output; inputs are phono (MC and MM), CD, Tuner, Aux, DAC and Rec; Very […]
X-Altra Mini II ‘Classic’ to Full Remote Control Upgrade PCB
in Preamplifiers
Upgrade the manual control X-Altra Mini II to full Remote Control. The Remote Control PCB replaces the Input Select control PCB and comes with an NXP LPC1114 microcontroller pre-programmed and mounted on the board. You must purchase an Apple TV Remote (aluminium silver type) from your local apple store – the cost is about $20. […]
X-Altra Mini II Remote Control Board Only PCB
in Preamplifiers
Use this option if you are only purchasing the Remote control board and no others. PCB comes with NXP LPC1114 mounted and programmed. Do not use cheap plastic imitation Apple TV Remotes from Amazon or Ali Express – you will run into problems. Attention: you must use the Remote control housing with this board, available […]
HifiSonix Standard PSU PCB
in Power supplies, Preamplifiers
This PSU features +-18V rails, <100 uV wideband noise at full load along with a muting control circuit for any muting function required by the end user. Additionally, a +12V 40mA relay supply is provided and +5V/+3.3V at 60mA. The board uses a low noise 15 or 25VA PCB mount Nuova Talema transformer.
Hifisonix High Performance Balanced Line Stage PCB
in Preamplifiers
This line stage employs OPA1641 and OPA1642 opamps to provide a left + right balanced output plus two unbalanced outputs per channel. All outputs are equipped with relay muting (the mute control can come off either the Hifisonix Standard PSU or the X-Altra Mini II Remote Control Board). For specifications, BOM and write-up, see the […]