AUDIOPHONICS STA328 - True Direct 2.0 Digital FDA Amp Module

Based on an architecture Class-D, this AUDIOPHONICS amplifier module is characterized by a main input in SPDIF, coaxial or Toslink.

The amplifier switches directly from the SPDIF signal to the HP output without converting to analog, so the signal is as direct as possible.

For some applications that require it, an analog input has been added to the STA328 circuit, but it is slightly noisy.

This module has many features like an Equalizer and Integrated DAC (FDA).

Indeed this amplifier to operate in 2 different ways:

- Classic Stereo Amplifier

The chip STA 328 integrated, it is possible to achieve 2 x 60 Watts under 8Ω with a harmonic distortion level of 1%.

This module also integrates a complete control to the remote control, allowing to select the inputs, to set the equalizer and to manage the volume.

afin protecting your speakers, this card has a one protection circuitagainst the possible presence of a continuous component.
A timer also avoids unpleasant noise when switched on.

Char:

• Amplifier module: 2.0 support (stereo).
• High-pass filter for adjustable front speakers from 80 to 320Hz
• Low pass filter of the adjustable housing from 80 to 320Hz
• The filtering on the stereo channels is first order passes high and on the second order sub passes low.
• Bass level adjustable by remote control
• Built-in Equalizer: Bass boost 1, Bass boost 2, Bass boost 2
• 3 x 7-segment display
• Memory settings / volume
• Control by remote control or rotary encoder (Power, Mute, Vol +/-, CH +/-, EQ, Bass level, Dimmer ..)
• Inputs: (Toslink Optical, Coaxial Digital and Stereo Analog)
• HP Outputs: On Screw Terminals
• Input SPDIF natively supporting 24bit / 96khz (supported rates: 32, 44.1, 48, 88.2, 96, 176.4 (2x down-sampling), 192 (2x down-sampling) khz)
• Board supplied bare, assembled, tested and ready to be powered (Power supply from transformer of 2 x 20Vto 2 x 25V) or (from 2x25 to 30 VDC)

Specifications:

• Output Power per Channel (2.0):60W / 8Ω (1% THD + N) VCC = 35V
  40W / 4Ω (1% THD + N) VCC = 21V
• Food :Transformer 2 x 24V from 60 to 120VA
• Main module dimensions:215 x 80 x 40mm (L x W x H)
• Dimensions of daughter card (display):100 x 20 x 12 mm
• Length of the interconnection sheet: 14 cm
• Weight:360 g + 80 g

User manual(PDF)

Amplifier + DAC / ADC Module

Remote control

display

Example of implementation based on this module: