Dayton Audio DSP-BT4.0 Bluetooth USB Interface for DSP-408 - Wireless

Our review of the Dayton Audio DSP-BT4.0 focuses on a small, practical add-on for owners of the DSP-408 who want wireless streaming and mobile-based control. At its core this dongle adds aptX Bluetooth streaming to the DSP-408 and enables the DSP-408 Android app to adjust settings without a laptop. For users who already have the DSP-408 and want a tidy way to stream audio and tweak DSP settings from a phone, the DSP-BT4.0 is the simplest path to wireless convenience.

Key Features

• aptX Bluetooth streaming: Provides higher-quality Bluetooth audio to the DSP-408 compared with standard SBC, helping preserve detail when streaming from compatible devices.
• Wireless Android app control: Lets users make real-time adjustments to filters and levels from an Android device without needing to connect a laptop.
• USB interface: Plugs directly into the DSP-408 USB port for a compact installation that keeps the signal chain simple and tidy.
• Simple setup: Designed to pair quickly with mobile devices and connect to the DSP-408, reducing the time spent on configuration.
• Accessory-focused design: Built specifically as an add-on for the DSP-408, ensuring physical and functional compatibility with the processor.

Who It's For

The DSP-BT4.0 is aimed at DSP-408 owners who want to stream music from phones and tablets and who value the convenience of adjusting DSP settings without a computer. Installers and hobbyists who frequently tweak crossovers and EQ on site will appreciate the Android app control paired with Bluetooth playback.

It is not intended as a standalone DAC or a long-range Bluetooth transmitter; buyers who need extended wireless range, universal platform control beyond Android, or a full-featured audio interface may want to consider alternative networked audio solutions instead.

Pros & Cons

Pros

• Compact USB form factor integrates cleanly with the DSP-408 and keeps installation minimal.
• aptX support gives improved Bluetooth fidelity for compatible source devices.
• Enables mobile control via the DSP-408 Android app, speeding setup and adjustments at the listening position.
• Easy to use for those already familiar with the DSP-408 workflow.

Cons

• Bluetooth connectivity range can be limited, with mixed reports of signal drop or short reach in some environments.
• Functionality is tied to the DSP-408 and Android app, so iOS users and non-DSP-408 systems get little benefit.

Specifications

Product	Bluetooth USB interface for DSP-408
Bluetooth Codec	aptX (for higher-quality streaming)
Control	Wireless control via DSP-408 Android app
Connection	USB plug-in to DSP-408
Intended use	Streaming and remote control for Dayton Audio DSP-408
Compatibility	Designed specifically for the DSP-408

Our Verdict

The DSP-BT4.0 is a focused, cost-effective accessory for anyone who already owns a DSP-408 and wants simple Bluetooth streaming plus the convenience of Android-based control. It delivers clear value when range and cross-platform support are not critical, and it keeps the setup minimal while improving day-to-day usability of the DSP-408.

Frequently Asked Questions

Does this dongle enable wireless control of the DSP-408?
Yes. The DSP-BT4.0 allows the DSP-408 to be controlled wirelessly from an Android device using the DSP-408 app.

What Bluetooth codec does it use?
The interface supports aptX for improved Bluetooth audio quality from compatible source devices.

Will it work with iOS or other processors?
The accessory is designed specifically for the DSP-408 and the wireless control feature targets Android; iOS support is not part of the described feature set.