No. Plugging a cable into the Sony ULT Field 5 stereo pair setup breaks it, because AUDIO IN is a separate mode that switches the Stereo Pair feature off. You get one speaker playing a wired source, or two speakers playing wirelessly, but never both at once.
Quick Answer
No, Sony's help guide says the speaker cannot use Stereo Pair while it is in AUDIO IN mode, and plugging in a cable also silences the Bluetooth device. Wireless stereo needs two ULT FIELD 5 speakers, and the pair switches to the SBC codec. Our Bluetooth speaker shelf opens at R299, so a second unit need not be costly.
🎚️ Why the cable cancels the pair
Stereo Pair works by one of the 2 speakers acting as left and the other as right over a wireless link. When you push a cable into the AUDIO IN jack, the speaker changes to a wired 3.5 mm input mode and stops accepting the Bluetooth feed. Sony states plainly that Stereo Pair cannot be used in that mode, and the same restriction applies to Party Connect.
So an aux cable cannot be the shared source for both units. If you want a cable-fed laptop playing through two speakers, you need a different route: Bluetooth from the laptop to the pair, or two wired speakers fed by a splitter.
🔗 What the wireless pair needs and costs you
Sony's documented setup uses two ULT FIELD 5 units. You cannot pair a ULT FIELD 5 with a different Sony model for stereo and expect it to work.
There is also a trade-off on sound. When Stereo Pair is active, the codec switches to SBC. That is the baseline Bluetooth codec, and it carries less detail than the better options on the same phone. Party Connect, which links three or more speakers (each within 30 seconds of the last), does the same.
🔌 If you want a cable anyway
For single-speaker wired use, Sony asks for an audio cable with a stereo mini plug at both ends. A cable with high resistance can make the volume lower, so a short, plain lead is better than a cheap thin one.
A lead of 1 to 2 m is plenty for a desk, and a 3.5 mm stereo mini plug at each end is the connector to look for. Turn the speaker on after plugging in. Volume is then set from the source device and the speaker's own controls together, so start low on both.
🏠 A small Johannesburg flat
In a one-desk flat in Johannesburg, the realistic choice is usually the wireless pair on shelves either side of a monitor, with the laptop on Bluetooth. A cable run across the room just to use AUDIO IN gives up the stereo feature you paid for.
Our wireless speakers range lists entry pairs too: two of the Promate Punch speakers at R299 each support True Wireless Stereo Pairing. To see what buyers pick most, check the best-selling speakers, or open the broader speakers category if you also want wired desktop options.
Frequently Asked Questions
Can Sony ULT Field 5 stereo pair over an AUX cable?
No. Sony says the speaker cannot use Stereo Pair while it is in AUDIO IN mode.
What do I need for a wireless stereo pair?
Two ULT FIELD 5 speakers, linked through the Stereo Pair function. Sony's documented setup does not mix in other models.
Does stereo pairing reduce sound quality?
The codec switches to SBC in Stereo Pair, which is the basic Bluetooth codec. Whether you can hear the difference depends on your phone and the track.
Does an aux cable disable Bluetooth on the speaker?
Yes, plugging a cable into AUDIO IN disables audio output from the Bluetooth device.
Does a long or thin cable matter?
It can. Sony says a cable with significant resistance may lower the volume, so use a plain stereo mini lead.
Want two speakers that pair out of the box?
Compare the Bluetooth speakers on our shelf and look for True Wireless Stereo pairing before you buy a second unit.