Dayton Audio DSP-408 4x8 DSP Digital Signal Processor for Home and Car Audio (230-500)
Dayton Audio DSP-408 4x8 DSP Digital Signal Processor for Home and Car Audio (230-500)
Dayton

Dayton Audio DSP-408 4x8 DSP Digital Signal Processor for Home and Car Audio (230-500) | Like New

SKU: DSP-408-LN
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$153.99
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The Dayton Audio DSP-408 4x8 DSP Digital Signal Processor (230-500) unlocks complete audio control for custom sound systems, automobile audio and home theaters. The premium Analog Devices ADAU1701 SigmaDSP chipset powers this little processor, which has four inputs and eight outputs and supports both RCA and high-level connectors. Real-time digital signal processing allows users to adjust system performance through time delay alignment, adjustable crossovers, 10-band parametric EQs per channel and adaptable input/output mixing. For audiophiles and professionals seeking accuracy and adaptability in any listening scenario, the DSP-408 is an essential tool due to its onboard protective circuits, user-friendly Windows GUI, optional Bluetooth connectivity and remote controls.

Quick specs

Product Type
Digital Signal Processor
Audio Processor
Analog Devices ADAU1701 SigmaDSP 28/56-bit
Input Impedance
RCA: ≥20,000 ohms; High-level: 180 ohms
High-Level Max Input
≤8V
Outputs
8 RCA low-level outputs
RCA Output Voltage
4V rms

Key Features

  • 4 Inputs / 8 Outputs with RCA and high-level inputs with eight RCA outputs for broad system compatibility.​

  • 10-Band Parametric EQ Per Channel with advanced equalization for detailed frequency tuning.​

  • Variable Crossovers with independent high/low/band-pass, selectable slope (0–24dB) and multiple filter types (Linkwitz-Riley, Butterworth, Bessel).​

  • Time Alignment & Delay with 0–277cm or up to 8.1471ms per channel, adjustable for perfect staging.​

  • Flexible Input/Output Routing distribute mixed or individual inputs across any output channel.​

  • Bluetooth App Control with optional dongle for wireless audio streaming and mobile app DSP tuning.​

  • Windows GUI Software with intuitive graphical user interface for comprehensive signal configuration.​

  • Preset Management with six system memory slots for instant recall, load, save or delete settings.​

  • Low Noise, High Fidelity with 24-bit/48kHz sampling, SNR ≥115dB, THD+N 0.008%, frequency response 20–20,000Hz.​

  • Robust Protection with over-voltage, reverse-voltage, mute circuit and soft-start protection.

Benefits

  • Versatile Integration designed for home, car and custom applications—expand any system with precision DSP.​
  • Pristine Sound Quality that ultra-low noise and distortion let you achieve professional-grade clarity and detail.​
  • Maximum Customization that fine-tune frequency curves, speaker timing and crossovers for tailored performance.​
  • Smart, Easy Control that PC software and optional Bluetooth app transform complex DSP into easy adjustments.​
  • Quick Recall & Safety to practice, store and swap between custom settings with robust circuit protection.​
  • Reliable & Compact with durable build, flexible power (9–17V), compact size for discreet installs in any setup.​
Manufacturer Dayton
Manufacturer Part Number 230-500
Product Name Dayton Audio DSP-408 4x8 DSP Digital Signal Processor for Home and Car Audio
Product Type Digital Signal Processor
Audio Processor Analog Devices ADAU1701 SigmaDSP 28/56-bit
Inputs 4 RCA low-level, 4 high-level (speaker), Bluetooth optional (via DSP-BT4.0 dongle)
Input Impedance RCA: ≥20,000 ohms; High-level: 180 ohms
High-Level Max Input ≤8V
Outputs 8 RCA low-level outputs
RCA Output Voltage 4V rms
Output Impedance <50 ohms
Signal Routing Input/output mixing across all channels
Parametric EQ 10 bands per output channel
Variable Crossovers High/Low/Band-pass; slopes: 6/12/18/24dB; Linkwitz-Riley, Butterworth, Bessel, etc.
Time Delay Per output: 0–277cm (8.147ms, 1cm increments)
Phase Adjustment Supported
Sampling Rate/Bit Depth 24-bit/48kHz
Frequency Response 20–20,000 Hz
THD+N 0.008%
Signal-to-Noise Ratio ≥115dB
Preset Memory 6 recallable preset slots
Protection Circuits Over-voltage, reverse-voltage, mute circuit, delay, soft start
Remote Out Current >500 mA
Bluetooth Optional DSP-BT4.0 dongle (audio streaming, app control)
GUI Software Windows PC (USB), Bluetooth app (mobile)
Power Input 12V DC, 1.5A (adapter included); Operating voltage: 9–17V DC; AC adapter: 100–240V
Dimensions (W x H x L) 6.53 x 1.02 x 4.55 inches
Weight 1.94 lbs

Frequently Asked Questions

Dayton Audio DSP-408 4x8 DSP Digital Signal Processor for Home and Car Audio (230-500) | Like New

What is the primary use-case for the DSP-408?
The DSP-408 is designed for both home and car audio systems where you need fine control of signal routing, EQ, crossover and timing. If you have multiple amplifiers, speaker outputs or both front and rear/woofer channels, the 4 inputs and 8 outputs offer excellent flexibility.
Can I use it with a factory car audio head-unit that has no preamp outputs?
Yes. The DSP-408 features high-level (speaker-level) inputs (4 channels) which let you tap the signal from the factory speakers/head-unit and feed the DSP as though it had preamp outputs.
Will this unit work for a home theater system?
Absolutely. Since it includes RCA pre-amp inputs and outputs, you can integrate it with a home AV receiver or pre-amp for channel processing, room correction and multi-channel configurations, provided your DSP architecture matches.
How user-friendly is the control software?
Very. The Windows GUI provides a clear visual interface for EQ, delay, crossovers and routing. The mobile app (with optional Bluetooth dongle) gives you wireless control from a phone/tablet. While DSP design always has a learning curve, the DSP-408 is one of the more accessible units.
How many presets can I save?
You can save, load, recall or delete multiple preset files, and each preset can be given a customizable name/ID. This allows switching quickly between different system profiles (e.g., home vs car, listening vs party modes).
Does this processor include built-in Bluetooth streaming?
Not out of the box. The DSP-408 supports Bluetooth via an optional Bluetooth dongle (DSP-BT4.0) which lets you stream audio and control the unit via mobile.
What are the specs of the equalizer and crossovers?
Each of the eight output channels features a ten-band parametric EQ, high and low shelf filters and crossovers with selectable slopes (up to 24 dB/octave) and filter types (Linkwitz–Riley, Butterworth, Bessel).
Is delay adjustment precise enough for speaker alignment?
Yes. You can adjust delay from 0 to 277 cm (approximately 8.15 ms) in 1 cm increments, enabling pretty fine alignment of speakers in a system.
What is the distortion performance?
THD+N is specified as approximately 0.008% under typical conditions, ensuring very low distortion signal processing.
Can I route any input to any output?
Yes—input/output mixing is supported, so you can combine signals, route one input to many outputs or process selectively based on your system layout.
What are the operating voltages and physical dimensions?
Operating voltage: 9–17 V (suitable for 12 V car systems) or via included adapter for home use (100–240 V mains). Dimensions: approx. 6.53″ W × 1.02″ H × 4.55″ L.
Is it suitable for active speaker setups (multiple amps/drivers)?
Yes, the 8 outputs make it ideal for active systems where you have separate amplifiers for different drivers (woofer, midrange, tweeter). With per-channel EQ, crossover and delay you can treat each driver individually.
How do I integrate it into a vehicle that turns off the head unit when the ignition is off?
Because the device accepts 12 V turn-on and has high-level inputs, you can wire it to sense speaker signal, or use the remote turn-on harness when the vehicle is keyed off, to retain settings or avoid unwanted pop. The manual covers remote wire harnessing.
What if I only need 4 outputs—can I just use half the channels?
Yes—there is no need to use all eight outputs. You can configure only four outputs and leave the others inactive or routed as needed.
Can it be mounted in tight spaces or is ventilation needed?
It’s compact (just over 1″ high) which makes it mountable in many installations. As with any electronics, ensure ventilation, avoid stacking on heat-generating devices and maintain at least minimal clearance.
Are firmware updates or software improvements available?
Yes—Dayton Audio provides firmware updates and the Windows GUI is updated periodically. The latest manual indicates support up to June 2022.
What kind of support is available if I need help setting it up?
Dayton Audio provides user manuals, online forums, FAQ sections and downloadable software. Many dealers also offer installation advice.
Is there any special consideration when connecting high-level inputs (from factory speaker outputs)?
Yes—when using high-level inputs you must switch the turn-on selector to “SPK” mode (speaker sensing) instead of remote or RCA. The manual details the correct wiring.
Will this processor add latency that is perceptible during real-time applications (e.g., live performance or car audio with video)?
While digital processing always adds some latency, the DSP-408 is designed for audio installs (not necessarily ultra-low latency live performance). For typical listening/viewing the latency is negligible, but if you are synchronizing video and audio (e.g., car video systems) you should measure and adjust delay accordingly.
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Dayton Audio DSP-408 4x8 DSP Digital Signal Processor for Home and Car Audio (230-500)

Dayton Audio DSP-408 4x8 DSP Digital Signal Processor for Home and Car Audio (230-500) | Like New

Dayton

$153.99