DSPA 406 Technical Specs
DSP ChipADAU1701
DAC ChipADAU1701 & PCM1754
ADC ChipADAU1701 & PCM1808
OpampMC33078
CapacitorsHigh Temperature for High Reliability to 105°C electrolytics and WIMA film Caps
PC ConnectionUSB – B
Processing FunctionsCrossover Frequency: 20Hz ~ 20kHz @ 1dB steps / Master Gain: 0 ~ 60dB / Channel gains: -20dB ~ +5dB Polarity: Phase Reversal 0 or 180 / EQ filters Q 0.5 ~ 15 @ 0.1 steps / Input Mixer Three Linking Functions: Volume Linking- Absolute or Relative EQ Linking – Relative or Absolute Crossover Linking – With EQ link on, Freq Link button will link crossovers
Output EQEQ bands: All Channels 31 @ ± 15dB in 0.1dB Steps Filter Functions: Peak / High Shelf / Low Shelf / 1st order All Pass/ 2nd Order All Pass
CrossoverButterworth & Bessel: 6,12,18,24,30,36,42,48dB / Linkwitz: 12, 24, 36dB
Delay0 ~ 17ms / 0.02ms Steps
Inputs8 x Hi / 2 x RCA /1 x Opt / BT
XO Phase RotationVariable Phase shift at HP and LP filters from 0° ~ 359°
Input EQEQ bands: All Channels 5 bands @ ± 15dB in 0.1dB Steps Filter Functions: Peak / High Shelf / Low Shelf / 1st order All Pass/ 2nd Order All Pass Input Delay: 0 ~ 10ms in 0.02 Steps
Frequency Resp:20Hz ~ 40kHz
Operating Voltage10V ~ 16V
Input Sens (V) RCA2.3V Max
Input Sens (V) Hi10V
RCA Out Voltage6 x 4.5V
RCA Out SpecsTHD+Noise 100dB
Amp Outputs50W x 4, Class AB
Dimensions (mm)180 x 130 x 41
Start-Stop readyYes
EPS Error Protection SystemYes
FinishBlack anodized Aluminum
Auto Turn On via DC Offset or Signal SensingYes
Remote Turn on OutputYes
Built in BluetoothYes
THD+Noise Amplifier
S/N ratio Amplifier
THD+Noise RCA out
S/N ratio RCA out
Fuse Rating10A
Input impedance:6 Ohms
ControllerOptional
Input MixerYes
Presets8
Software Interface64 bit Windows 8, Windows 8.1 or Windows 10, 11
Navigation ModeYes
Power off DelayYes
Noise Gate (analog Input)Yes
Automatic Switching Config.Yes
Input EQYes
Input All Pass FiltersYes
Input DelayYes
Variable Phase 0~360 at crossover filtersYes
Output EQ31 Bands
Hi-Shelf, Low-ShelfYes
Output All Pass filtersYes
Output Delay0 ~ 17ms @ .02ms steps

The DSPA 406 provides an accessible entry point for individuals keen on improving their car audio setup. It’s equipped with necessary features such as a 4 x 65W/4Ω integrated Class AB amplifier, ensuring decent sound output without overwhelming complexity. Its voltage build-up technology and a variety of inputs and outputs, including 4 high level and 4 AUX inputs, plus 6 RCA outputs, offer compatibility with most vehicle audio systems, allowing for a straightforward installation process.

On the software front, the DSPA 406 supports Bluetooth® 5.0 with audio codecs like aptX HD, AAC, and SBC, catering to basic wireless audio streaming needs. It comes with a 31-band EQ, adjustable crossover frequencies, and time alignment, providing users with the tools to customize their audio experience, albeit within the constraints of an entry-level device. The navigation mix feature ensures that driving aids like navigation prompts are given priority, enhancing safety. With its built-in Error Protection System (EPS), the DSPA 406 mitigates the risk of user errors, offering a forgiving learning curve for those new to audio customization.