J-Tech Digital JTD4KATSW Video Converter
- 4K at 60Hz pass-through to the display while audio is extracted
- SPDIF optical and analog RCA L/R outputs for soundbars, amps, receivers
- Three EDID modes: TV/Pass, 2-Channel Stereo, 5.1 Surround Sound
- HDCP passthrough keeps copy-protected sources working
- Tabletop unit, plastic body, 3.3 by 2.4 inches
- 5 volt DC supply, 19-pin HDMI interface
Last refreshed Aug 4, 2026 · Based on the Amazon listing and published specifications, not hands-on testing.
A small tabletop box that splits audio off an HDMI feed so an older sound system can play what the screen shows. It does not switch between sources, and the listing does not name which HDMI versions it accepts.
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ASIN: B00YHS5E6QModel: JTD4KATSWCategory: Video Converters
Overview
A toggle switch on the housing sets how the extractor presents itself to the source, choosing between passing the display's own audio information, forcing two-channel stereo, or asking for surround sound. Incoming HDMI video continues to the screen untouched while the separated audio leaves through the optical port or the RCA jacks. The plastic body rests on a shelf or cabinet top rather than being rack mounted.
Reaching an amplifier or soundbar that has no HDMI input is the job here, and the EDID switch is what makes that workable when a source refuses to output audio the old gear can read. Expect a single input and a single output, so anything with several devices still needs a switcher ahead of it. The supplied power arrangement is a fixed low voltage feed, and no cables or mounting parts are named in the listing.
Who it's for
Someone whose display handles video while a separate amplifier or soundbar handles sound, and whose source needs its audio format negotiated. Buyers wanting toggling between game consoles, a cable box and a streamer should look elsewhere.
Pros and cons
- Passes 4K video at 60Hz
- Optical and RCA audio outputs
- Three selectable EDID audio modes
- HDCP passthrough for protected content
- No HDMI input switching
- Only one HDMI input and output
- Cables and power adapter not listed
- No rack mounting option
Performance notes
The EDID switch decides what the source believes the downstream equipment can handle, so a mismatch there is usually why audio goes missing or drops to stereo. Because video is passed through rather than processed, picture quality depends on the source and display, not the extractor. Audio format support follows the mode selected, and the optical and RCA paths carry different signal types.
Specifications
| Brand | J-Tech Digital |
|---|---|
| Model | JTD4KATSW |
| Dimensions & fit | |
| Item Dimensions L X W | 3.3 × 2.4 inches |
| Capacity & performance | |
| Audio Output Mode | Stereo, 2-Channel Stereo, 5.1 Surround Sound |
| Power & efficiency | |
| Minimum Supply Voltage | 5 volts |
| Maximum Supply Voltage | 5 volts |
| Construction & materials | |
| Material Type | Plastic |
| Compatibility & installation | |
| Mounting Type | Tabletop |
| Compatible Devices | PC |
| Interface | HDMI |
| Included components | |
| Unit Count | 1 |
| Warranty & support | |
| Warranty Description | Lifetime |
| Other details | |
| Number Of Items | 1 |
| Number Of Pins | 19 |
| Number Of Channels | 3 |
| Part Number | JTD-152 |
Frequently asked questions
How large is the J-Tech Digital JTD4KATSW unit?
The housing measures 3.3 inches long by 2.4 inches wide and is made of plastic, so it takes little space on a shelf or cabinet top.
What is the EDID switch on this extractor for?
It sets one of three modes, TV/Pass, 2-Channel Stereo, or 5.1 Surround Sound, which tells the source what audio the downstream equipment can accept.
Does the J-Tech Digital JTD4KATSW switch between several HDMI sources?
No. It takes one HDMI input and sends one HDMI output onward, so multiple devices need a separate switcher ahead of it.
What kind of power does the extractor need?
It runs on a 5 volt DC supply. The listing does not name a power adapter or cables as included items.
Will copy-protected content still play through it?
HDCP passthrough is supported, so protected sources can continue to the display while audio is extracted.