Adding a digital audio processor can make your head unit’s output connections as important as its screen or phone integration. But “digital output” does not necessarily mean optical: a coaxial S/PDIF port uses a different cable and connector from optical TOSLINK.
These three large-screen Android stereos offer different memory configurations and advertised audio connections. Use the product details and the buying guide below to check compatibility before choosing one for your dash.
Best 3 Double Din Head Units with Optical Output Picks for 2026
Best for Audio Tuning
- Optical/coaxial outputs and 4V RCA pre-outs
- 32-band EQ with time alignment
- 9-inch QLED screen and built-in 4G LTE
Best For: Externally amplified systems needing detailed sound tuning
Best for More Memory
- Optical and coaxial digital outputs
- 8GB RAM and 128GB storage
- Built-in 4G module and GPS navigation
Best For: Buyers wanting more memory with a digital-output amplifier
Best for Core Joying Features
- Optical and coaxial digital outputs
- 4GB RAM and 64GB storage
- GPS navigation and SIM-based 4G internet
Best For: Drivers prioritizing digital audio over additional memory
Best for Audio Tuning – ATOTO S8 Gen4 9-Inch QLED
Among double din head units with optical output, the ATOTO S8 Gen4 stands out for its audio controls: optical and coaxial digital outputs sit alongside 4V RCA pre-outs, a 32-band EQ, time alignment, and crossover adjustment. Its 9-inch QLED screen and built-in 4G LTE also make it a capable choice for navigation and apps.
Best For: Drivers building an externally amplified system who also want extensive sound tuning and a large display.
Pros:
- Optical and coaxial digital outputs plus 4V RCA pre-outs offer several audio connection options.
- 32-band EQ, time alignment, and crossover controls support detailed tuning.
- 9-inch, 1280 × 800 QLED display; built-in 4G LTE can provide internet access with a SIM card.
Cons:
- CarPlay and Android Auto work wirelessly only; wired projection is not supported.
- The 220 × 140 mm front panel may obstruct nearby controls, and installation accessories may be needed.
Choose this one if tuning flexibility matters as much as the optical connection. Check both chassis fit and screen clearance before ordering; HDMI input/output also requires an optional adapter.
Best for More Memory – Joying JY-HTD01N8 8.9-Inch
If you are comparing double din head units with optical output and want more memory, the Joying JY-HTD01N8 pairs optical and coaxial digital outputs with 8GB RAM and 128GB storage. Its 8.9-inch Android 13 touchscreen also supports CarPlay, Android Auto, GPS navigation, and SIM-based internet access.
Best For: Buyers who want the higher-memory Joying configuration for an optical- or coaxial-input amplifier.
Pros:
- Optical and coaxial outputs can connect to compatible external amplifiers.
- 8GB RAM and 128GB storage provide more capacity than the 4GB/64GB Joying model in this roundup.
- Includes GPS and 4G antennas; built-in 4G module supports internet access with a SIM card.
Cons:
- The 4G module does not support phone calls or SMS.
- Factory GPS antennas, backup cameras, Bluetooth, USB, and microphones are not supported; vehicle-specific installation parts may be required.
The extra memory is its clearest distinction from the otherwise similarly specified Joying alternative. Confirm your amplifier has a matching digital input and check dash, wiring, and factory-equipment compatibility before buying.
Best for Core Joying Features – Joying JY-HTD01N4 8.9-Inch
The Joying JY-HTD01N4 brings optical and coaxial digital outputs to shoppers considering double din head units with optical output. It has an 8.9-inch Android 13 touchscreen, CarPlay and Android Auto support, GPS navigation, and a built-in 4G module, with 4GB RAM and 64GB storage.
Best For: Drivers who want Joying’s digital audio connections and navigation features without needing the 8GB/128GB configuration.
Pros:
- Optical and coaxial outputs accommodate compatible digital-input amplifiers.
- GPS antenna is included, and supported offline maps can be saved for navigation.
- Built-in 4G module provides SIM-based internet access where supported.
Cons:
- 4GB RAM and 64GB storage are lower than the JY-HTD01N8’s specifications.
- Does not support factory GPS antennas, backup cameras, Bluetooth, USB, or microphones; installation adapters may be necessary.
- SIM-based 4G does not support calls or SMS.
This is the Joying option to consider when optical output matters more to you than the sibling model’s additional memory. Verify your vehicle’s fit and factory-feature needs, and budget separately for any required installation parts or optional accessories.
How We Picked the Best Double Din Head Units with Optical Output
We focused on the three selected large-screen, Android-based stereos and the specifications most relevant to a digital-audio installation: advertised output type, processor compatibility, memory, phone integration, and fit. The listed Joying models advertise coaxial output; the supplied ATOTO S8 Gen4 description specifies a Hi-Fi DSP and 4V RCA outputs, but does not establish an optical output. Because listings can vary by version or seller, verify the exact model’s port diagram and manual before ordering.
Quick Comparison
The Joying 8GB+128GB model offers the most listed RAM and storage, making it the stronger choice of the two Joying configurations if you plan to run apps directly on the stereo. The Joying 4GB+64GB version retains the advertised coaxial connection with less memory; compare current prices to decide whether the upgrade matters to you. The ATOTO S8 Gen4 lists wireless CarPlay and Android Auto, 4G LTE, 4GB+64GB, a built-in DSP, and 4V RCA outputs. Those analog RCA outputs may suit an amplifier, but they are not a substitute for a required digital input.
Key Buying Factors for Double Din Head Units with Optical Output
Confirm the Digital Connector and Signal
Optical TOSLINK and coaxial S/PDIF can both carry digital audio, but their physical connections are different. If your DSP has only an optical input, do not assume a head unit advertising “coaxial” will connect directly. Check whether your DSP accepts coaxial input or whether you would need a compatible converter. Also confirm supported sample rates, channel format, and whether the head unit sends audio from the sources you actually use through that output.
Check Dash Fit, Not Just the Double DIN Label
A double DIN chassis does not guarantee that an 8.9- or 9-inch display will clear your vents, climate controls, or trim. Measure the space around the radio, check screen adjustment and mounting depth, and budget for any vehicle-specific fascia, wiring harness, antenna adapter, or steering-wheel-control interface.
Choose Features You Will Use
More RAM and storage can be worthwhile if you install navigation or media apps on the head unit. If you mainly use CarPlay or Android Auto, prioritize dependable phone connectivity and the audio output your system requires. Confirm whether the exact Joying variants support the wired or wireless phone connection you prefer; the provided names establish compatibility but do not specify the connection mode.
Who Should Buy Which Double Din Head Units with Optical Output?
Choose the Joying 8GB+128GB if you want its advertised coaxial output and more headroom for on-device apps. Choose the Joying 4GB+64GB if coaxial output is the priority and its lower-memory configuration meets your needs. Consider the ATOTO S8 Gen4 if wireless phone integration and its listed RCA/DSP features suit an analog-audio setup. If you specifically need Double Din Head Units with Optical Output, none of these descriptions confirms a native optical port: verify a TOSLINK-equipped variant before buying, or choose a different unit that explicitly lists one.