Your new TV has a sleek, modern look and every streaming app you could want, but it only outputs sound through a single glowing optical port—while your vintage stereo system or favorite pair of wired headphones relies on analog RCA or 3.5mm jacks. Bridging that gap is exactly where a dedicated conversion box steps in, turning a silent digital stream into rich, listenable audio without forcing you to replace perfectly good gear.
I’m Mo Maruf — the founder and writer behind The Tools Trunk. I’ve spent years analyzing audio interface hardware, comparing DAC chipsets, and field-testing converter boxes to understand which engineering choices actually deliver clean signal paths versus which ones introduce hum, latency, or channel loss.
Whether you are connecting a turntable preamp to a soundbar or pulling audio from a Blu-ray player into an amplifier, landing on the right a to d converter requires matching sample rate support, input types, and output voltage to your specific setup rather than just grabbing the cheapest option.
How To Choose The Best A To D Converter
Not all converters are built the same. The wrong one will hum, glitch, or refuse to work altogether depending on your TV’s audio output format. Here are the three most important factors to nail before you click buy.
Input Format Compatibility: PCM vs. Dolby vs. DTS
Most modern TVs send audio as multichannel bitstreams (Dolby Digital or DTS) by default. Many budget converters only accept linear PCM stereo—meaning they will produce silence or static when fed a Dolby 5.1 signal. If your source device outputs Dolby or DTS, you need a converter that explicitly decodes those formats down to 2.0 channel analog. The OREI DA34 in this list handles exactly that, while simpler PCM-only units will force you to change your TV’s audio setting to “PCM” in the menu.
Sampling Rate and Bit Depth
Most units advertise 192kHz/24-bit support, but that spec refers to the maximum input they can handle, not the quality of the conversion chip. A converter that supports 192kHz but uses a cheap DAC chip may still roll off high frequencies or add noise. Look for units with metal housings and separate analog amplifier stages if you are feeding high-impedance headphones or high-end powered speakers—those features indicate better shielding and cleaner power delivery.
Output Options and Simultaneous Usage
If you plan to drive both headphones and a speaker system at the same time, verify the converter supports simultaneous RCA and 3.5mm output. Some units mute one jack when the other is occupied. Also consider whether you need a dedicated headphone amplifier for high-impedance cans. Units like the J-Tech Digital include a physical volume knob and bass adjustment for headphone use, which is rare at this price tier.
Quick Comparison
On smaller screens, swipe sideways to see the full table.
| Model | Category | Best For | Key Spec | Amazon |
|---|---|---|---|---|
| PROZOR 192kHz DAC | Mid-Range | Optical to RCA/3.5mm stereo | 192kHz/24-bit PCM | Amazon |
| YEUGICEO HDMI eARC Audio Extractor | Mid-Range | HDMI ARC to optical/coaxial | eARC/ARC, CEC volume | Amazon |
| Avedio Links HDMI ARC DAC | Mid-Range | PCM-only stereo extraction | Simultaneous RCA + 3.5mm + optical | Amazon |
| J-Tech Digital DAC with Headphone Amp | Premium | Headphone users needing bass control | 32–600Ω headphone amp | Amazon |
| OREI DA34 Dolby Decoder | Premium | Decoding Dolby/DTS 5.1 to stereo | Dolby/DTS decode + optical cable included | Amazon |
In‑Depth Reviews
1. J-Tech Digital DAC with Headphone Amplifier & Bass Control
This converter earns the top spot because it solves the two problems most other units ignore: headphone impedance matching and bass tuning. The built-in amplifier drives headphones from 32 ohms all the way up to 600 ohms, meaning you can plug in high-impedance studio cans without a separate headphone amp. The bass control knob lets you boost or cut low-end presence at the converter stage, so you are not relying on an amplifier’s EQ or software filters that may introduce distortion.
The metal chassis provides better RF shielding than the plastic boxes common at this price point, and the USB power connection is clean enough that users report no audible hum or ground loop noise even when the converter sits inches from other AV gear. Simultaneous RCA and 3.5mm output work without one port muting the other, which is a convenience most competing units fail to deliver.
Some units ship with only a USB power cable (no wall adapter), so you will need a spare 5V USB brick or a TV USB port. The optical cable is also not included in the box. For anyone connecting high-end headphones or wanting hardware-level bass control when bridging a new TV to an old stereo, this is the most capable solution.
What works
- Headphone amp handles 32–600 ohm loads with a dedicated volume knob
- Bass control knob for hardware EQ without extra processing
- Simultaneous RCA and 3.5mm output without muting
- Metal enclosure reduces RF interference
What doesn’t
- No power adapter included; requires user-supplied USB brick
- Optical cable not included in the box
2. OREI DA34 Dolby Digital Audio Decoder
This is the converter to pick when your source device outputs Dolby Digital or DTS and you cannot—or do not want to—change the TV audio format to PCM in the settings menu. The OREI DA34 actively decodes multichannel bitstreams down to 2.0-channel analog stereo, which means it preserves dialogue from the center channel and maintains dynamic range that would otherwise be lost with a simple PCM-only converter. The small plastic housing (roughly 3 by 2 inches) tucks behind a TV or shelf easily.
It includes a power adapter and an optical cable in the box, so there are no hidden accessories to buy. Both RCA L/R and 3.5mm headphone outputs work simultaneously, and users routinely pair it with Sennheiser wireless headphone transmitters and outdoor audio setups. The side-mounted input switch must be toggled to optical or coaxial depending on your source—a simple step that first-time buyers sometimes miss.
For the premium cost, you get genuine format decoding rather than simple passthrough. The trade-off is the plastic body does not shield as well as metal, and some users report needing to reseat the optical cable to get a lock on the signal. If your TV only outputs Dolby Digital and you want a clean stereo downmix without menu tweaking, this is the right choice.
What works
- Decodes Dolby Digital and DTS 5.1 to stereo 2.0
- Includes power adapter and optical cable
- Simultaneous RCA and 3.5mm headphone output
- Compact size hides behind equipment
What doesn’t
- Plastic housing offers less RF shielding than metal alternatives
- Side input toggle switch can be confusing on first use
3. PROZOR 192kHz Optical to RCA Converter
The PROZOR hits the sweet spot for the majority of users: it takes optical or coaxial digital input and outputs to both RCA and 3.5mm analog, supports a full 192kHz/24-bit sample rate, and includes a magnetic ring on the USB power cable to filter high-frequency noise from the power line. The metal housing adds durability and passive heat dissipation for long run times without signal degradation.
Users report zero-distortion audio when connecting TV optical output to old Bose and JBL systems, and the converter handles PCM stereo sources from Blu-ray players and PS4 consoles without any dropout. The magnetic ring power cord is a thoughtful addition—many cheaper units omit this ferrite choke, and buyers end up chasing ground loop hum that disappears once they add one.
The unit supports Dolby AC-3 and DTS 5.1 input but only outputs 2.0 channel stereo—so if you feed it a 5.1 bitstream, it downmixes but may miss the center channel dialogue in some configurations. For pure PCM stereo sources, this is an excellent entry-level to mid-range converter that covers the basics without any fuss.
What works
- Metal housing with magnetic ring on power cable reduces noise
- 192kHz/24-bit sample rate support for high-resolution sources
- Includes optical and USB power cables in the box
- Straightforward plug-and-play with no driver installation
What doesn’t
- 5.1 downmix may lose center channel dialogue
- No power adapter included
4. YEUGICEO HDMI eARC/ARC Audio Extractor
This converter solves a very specific problem: your TV has an HDMI ARC port but no optical or coaxial output, and your soundbar or amplifier only accepts digital optical or coaxial input. The YEUGICEO extracts audio from the TV’s HDMI ARC/eARC channel and outputs it as either optical or coaxial digital signal, preserving audio quality without converting to analog and back. The CEC (Consumer Electronics Control) protocol integration lets you adjust volume using the TV remote when the source format is PCM.
The LED indicator changes color based on the incoming audio format—red for PCM (volume adjustable via TV remote) and blue for DTS or Dolby (volume not adjustable via TV remote). This gives immediate visual feedback on what your source is sending. The included TV Setting Card walks through enabling CEC and setting the correct audio output format, which eliminates the guesswork that frustrates many first-time ARC users.
It is worth noting that this is a digital-to-digital converter, not a DAC. If your end device (like an old stereo receiver) only has RCA analog inputs, you will still need an additional DAC after this box. The plastic housing feels lightweight, and the cable-mounted design means it dangles rather than sitting flat on a shelf. For bridging a modern TV’s HDMI ARC port to a digital soundbar or amplifier, it works precisely as intended.
What works
- Extracts audio from HDMI ARC/eARC to optical or coaxial output
- CEC volume control works with TV remote for PCM sources
- LED indicator shows PCM (red) vs. Dolby/DTS (blue) input
- Includes TV Setting Card for easy ARC setup
What doesn’t
- Does not convert to analog; requires separate DAC for RCA speakers
- Plastic housing and cable-mounted design feel less sturdy
5. Avedio Links HDMI ARC Audio Extractor DAC
The Avedio Links converter is the most affordable option in this list that handles HDMI ARC input and outputs both digital (optical/coaxial) and analog (RCA/3.5mm) simultaneously. It takes an HDMI ARC signal from a TV, extracts the audio, and sends it out through optical, coaxial, RCA, and 3.5mm jacks all at once—making it a great candidate for splitting audio to multiple devices at the same time. The aluminum housing is a welcome upgrade over the plastic bodies of similarly priced units.
This unit is strictly PCM stereo only. It does not decode Dolby or DTS, so if your TV outputs Dolby Digital by default, you must go into the TV audio settings and switch the output format to PCM or LPCM. The input selection switch on the panel lets you toggle between optical and coaxial digital inputs, and the included accessory bundle (HDMI cable, optical cable, and 3.5mm-to-RCA cable) means you likely have everything needed right out of the box.
Some users reported that the optical output did not pass audio when the unit was set to HDMI ARC mode—requiring the switch to be in the center position instead. This is a quirk of the specific implementation rather than a design flaw, but it can cause confusion during initial setup. The power adapter is included, which is a real advantage over the budget-tier competition. If your workflow is PCM-only and you need simultaneous multi-format output, this is a capable and inexpensive solution.
What works
- Simultaneous output via optical, coaxial, RCA, and 3.5mm jacks
- Aluminum housing for heat dissipation and RF shielding
- Includes power adapter, HDMI cable, optical cable, and 3.5mm-to-RCA cable
- Input switch between optical and coaxial digital sources
What doesn’t
- Does not decode Dolby or DTS; PCM stereo only
- Optical output in ARC mode may require switch in center position to work
Hardware & Specs Guide
DAC Chipset and Sample Rate
Every converter uses a digital-to-analog converter chip that determines how accurately it reconstructs the analog waveform from the digital stream. A 192kHz/24-bit chip can handle high-resolution audio, but the actual conversion quality depends on the chip’s signal-to-noise ratio (SNR) and total harmonic distortion (THD). Units with metal enclosures and separate analog stage circuitry typically deliver cleaner output than basic plastic-shelled designs that share power and ground planes between the digital receiver and analog output.
Input Format Decoding vs. Passthrough
Many converters labeled “Dolby/DTS compatible” simply pass the bitstream through without decoding, meaning the receiving device must handle the decode. True decoder units like the OREI DA34 actively convert multichannel Dolby Digital or DTS streams into 2.0-channel analog stereo. If your TV always outputs Dolby Digital and your amplifier only accepts analog stereo, you need a decoder. If your source outputs PCM, a simpler passthrough converter will work fine and cost less.
FAQ
Will this work if my TV only has HDMI ARC and no optical port?
Why is there no sound coming from my converter?
Can I use a converter to connect headphones and speakers at the same time?
What is the difference between optical and coaxial digital input?
Final Thoughts: The Verdict
For most users, the a to d converter winner is the J-Tech Digital DAC because it packs a dedicated headphone amplifier, hardware bass control, and simultaneous RCA/3.5mm output into a shielded metal chassis without creeping into premium-tier pricing. If you need true Dolby/DTS decoding to preserve dialogue from 5.1 sources, grab the OREI DA34. And for a straightforward budget solution when your source outputs PCM and you just need clean stereo conversion, nothing beats the PROZOR 192kHz Converter.