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The cheapest fix on the shelf

MOBOREST 6.35 mm to 3.5 mm Adapter

A 1/4-inch plug with a 3.5 mm (0.14 in) socket in the end of it, in one piece of metal, at the lowest published price on this shelf. What it does not say is whether it carries stereo.

MOBOREST 6.35 mm to 3.5 mm black metal headphone adapter

MOBOREST 6.35 mm to 3.5 mm Adapter

A 1/4-inch plug with a 3.5 mm (0.14 in) socket in the end of it, in one piece of metal, at the lowest published price on this shelf. What it does not say is whether it carries stereo.

Direction
6.35 mm (0.25 in) male to 3.5 mm (0.14 in) female — it goes into a 1/4-inch socket and takes a 3.5 mm (0.14 in) plug (from the title)
Contacts
MOBOREST puts nothing in writing on this. The listing never says TS or TRS, so whether the adapter passes stereo or sums it is unpublished — and that distinction is the subject of another page on this shelf
Housing
One-piece metal, stated durable enough to be tossed in pockets, bags and travel cases (maker’s bullet)
Conductor
Solid pure copper with 24K gold-plated connectors (maker’s bullet)
Grip
360-degree grip treads, stated to make plugging and unplugging easy and secure (maker’s bullet)
Pack
One piece — 1P in the title (from the title)
Finish
Black (maker’s bullet)
Price
$5.99 — the lowest published price on this shelf
Manufacturer reference
MOBOREST puts nothing in writing on this. No maker’s reference appears in the listing at all, only the Amazon one below
Weight
18 g (0.6 oz) in the product record
Amazon reference
B088DV177F
EAN
0633337843011
  • At $5.99 the least expensive item on this shelf, and often the part that was actually missing
  • One piece of metal: there is no molded join to work loose, which is where cheap adapters fail
  • The listing never states TS or TRS, so whether it carries a stereo signal is unpublished

Best for: Plugging 3.5 mm (0.14 in) headphones into the 1/4-inch socket of an amplifier, a digital piano or a keyboard.

Check price on Amazon

Specifications

Direction
6.35 mm (0.25 in) male to 3.5 mm (0.14 in) female — it goes into a 1/4-inch socket and takes a 3.5 mm (0.14 in) plug (from the title)
Contacts
MOBOREST puts nothing in writing on this. The listing never says TS or TRS, so whether the adapter passes stereo or sums it is unpublished — and that distinction is the subject of another page on this shelf
Housing
One-piece metal, stated durable enough to be tossed in pockets, bags and travel cases (maker’s bullet)
Conductor
Solid pure copper with 24K gold-plated connectors (maker’s bullet)
Grip
360-degree grip treads, stated to make plugging and unplugging easy and secure (maker’s bullet)
Pack
One piece — 1P in the title (from the title)
Finish
Black (maker’s bullet)
Price
$5.99 — the lowest published price on this shelf
Manufacturer reference
MOBOREST puts nothing in writing on this. No maker’s reference appears in the listing at all, only the Amazon one below
Weight
18 g (0.6 oz) in the product record
Amazon reference
B088DV177F
EAN
0633337843011

A 1/4-inch plug with a 3.5 mm (0.14 in) socket in the end of it. One piece of metal. Solid pure copper, 24K gold-plated. 360-degree grip treads. Black. $5.99.

That price is the point. This is the least expensive item on this shelf, and it is very often the part that was missing all along — the amplifier has a 1/4-inch headphone socket, the headphones end in 3.5 mm, and neither box contained the piece between them.

The one-piece housing is worth more than it sounds. Molded adapters are two halves pressed together, and the join is where they fail: the plug stays in the socket while the body turns. A single piece of metal has nothing to come apart. The treads are the other practical detail — deep enough to turn by hand behind an amplifier, which is where this part is always being fitted and never visible.

What the listing does not say is the thing that decides whether it belongs in a signal path: TS or TRS. One ring or two. A TS adapter carries one channel; a TRS adapter carries two. Another page on this shelf counts the rings and explains why a monitor on the wrong one hums, and the other adapter here states TRS in writing. This one says nothing, and a reader running a stereo line through it is guessing.

There is also no manufacturer reference — none at all, not a code and not a model name. For a part that works, that matters only when it has to be matched again a year later.

The product record gives 18 g (0.6 oz).

Availability

Read on the day this page was built: $6 at the American Amazon shop.

Read from Keepa on the day this page was last revised; stock and price both move without notice.

Prices quoted in this text were read on 2026-10-07. The live price is at the top of the page.

The questions players ask

Does this make my headphones work on an amplifier?

If the amplifier has a 1/4-inch headphone socket, yes — that is exactly the job. Most practice amplifiers and nearly every digital piano and keyboard use 6.35 mm (0.25 in), while nearly every pair of consumer headphones ends in 3.5 mm, and the part that bridges them is routinely not in either box. What this listing does not tell you is whether the adapter is wired TS or TRS: a TS adapter in a stereo path collapses it. Another page on this shelf counts the rings on a plug and explains the difference; one adapter here states TRS in writing, and this one does not.

Is a $5.99 adapter worth buying over a $15 one?

For an adapter that lives in a bag and gets used occasionally, the metal housing matters more than the plating, and this one is a single piece rather than two halves pressed together. What you give up is the written specification: no contact type, no manufacturer reference. If the adapter sits permanently in a studio signal path, the one here that publishes TRS and a reference is the safer buy. If it is going in a gig bag as the part that saves an evening, this is the one to own two of.

Instruments it is stated to fit

More cables & adapters

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    Connection
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    Length
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    Construction
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    Durability
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    Plating
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    Named compatibility
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    Color
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    Contacts
    Described as a stereo adapter cable. The listing does not use the words TS or TRS (maker’s bullet)
    Manufacturer reference
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    Weight
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    Amazon reference
    B06XBLQJRV
    EAN
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    Connection
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    Conductors
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    Certifications
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    Warranty
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    Named instruments
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    Maker
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    Manufacturer reference
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    Weight
    Not in the product record
    Amazon reference
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    EAN
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    Connection
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    Shielding
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    Jacket
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    Published warning
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    Length
    6.6 ft (from the title)
    Manufacturer reference
    10628
    Weight
    50 g (1.8 oz) in the product record
    Amazon reference
    B00Y2LANNW
    EAN
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    Check price on Amazon

Elsewhere in the cupboard

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    Quantity
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    Dimensions
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    Included
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    Amazon reference
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    EAN
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