How to Connect the HiBy W4 Bluetooth Headphone Amp to Wired Headphones: Step-by-Step Setup

Quick answer

Charge the HiBy W4, power it on, and hold its pairing control until the status light flashes to enter pairing mode. Open Bluetooth on your phone, computer, or player, select the HiBy W4 from the list, then plug your wired headphones into the W4's headphone output and raise the volume gradually. If the W4 does not appear in the list, delete any older HiBy W4 entry from your device's saved Bluetooth devices and pair again.

Turning wired headphones into a wireless setup is mostly a pairing job, but the order you do things in decides whether it works on the first try. The HiBy W4 is a portable headphone amp with Bluetooth, so it sits between your phone or computer and the headphones you already own.

This guide walks through the full sequence: charging, pairing, connecting headphones, choosing the right codec, and fixing the handful of problems that account for most failed setups. Keep your headphones and charging cable nearby before you start.

Before you pair: what you need

Have three things ready: the HiBy W4, a charged source device (phone, tablet, computer, or digital audio player), and your wired headphones. A short charging cable is useful in case the W4's battery is low, since a nearly empty battery can make pairing behave unpredictably or drop the connection shortly after it connects.

Check your headphone plug against the W4's output. If your headphones end in a 3.5mm plug, they connect directly. If they use a 4.4mm or 2.5mm balanced plug, you need the matching output on the amp, so confirm which version you own before assuming a cable is faulty. Adapters between balanced and single-ended plugs are not a safe substitute.

• Charge the W4 fully before first use so pairing and codec negotiation are not interrupted.
• Keep your headphones unplugged until pairing is finished, so you can hear confirmation tones clearly.

Step 1: Power on and enter pairing mode

Press and hold the W4's power control until it turns on. On a fresh unit, or after a factory reset, it usually enters pairing mode automatically. If it powers on and connects to a previously used device instead, hold the pairing control until the indicator flashes in the pairing pattern, then release.

The most common mistake here is holding the button too briefly. A quick press only powers the unit on or off; pairing needs a sustained hold. If the light never changes pattern, power the W4 off, wait a few seconds, and try again with a longer, steady press.

• Pair within a minute or two of entering pairing mode; many devices stop advertising after a short window.
• Stay within a meter of your phone or computer during the first pairing.

Step 2: Pair from your phone, computer, or player

Open the Bluetooth settings on your source device and start a scan. When the HiBy W4 appears in the list, select it and accept any pairing prompt. On Android, you may see a notification asking to allow access to calls and media; accept it so audio routes correctly.

If the W4 does not appear, the cause is usually a stale pairing record. Open your device's list of previously connected Bluetooth devices, forget or delete any entry named HiBy W4, then put the W4 back into pairing mode and scan again. This one step resolves most 'it paired before but won't now' cases.

• On Windows, check both the Bluetooth settings page and the sound output list after pairing.
• If two devices are competing for the W4, turn Bluetooth off on the one you are not using.

Step 3: Plug in your wired headphones

With the W4 connected, plug your headphones into the matching output. Push the plug in fully; a partially seated connector is a frequent cause of one channel cutting out or sounding thin. Then set your source device's volume to roughly 70 percent and raise the W4's volume gradually from zero.

Because the W4 is an amplifier, not just a wireless receiver, you have two volume stages. Leaving the source at maximum and controlling everything from the amp can add noise on sensitive in-ear models, while leaving the amp low and the source high limits headroom. Splitting the difference gives you the cleanest result.

• If one side is silent, reseat the plug and check whether the cable's connector is fully inserted.
• Lower the amp volume before unplugging headphones to avoid a sudden pop.

Step 4: Confirm the codec and connection quality

Once audio is playing, check which Bluetooth codec your phone negotiated. Higher-quality codecs improve detail but are more sensitive to interference, so if you hear stuttering, switching to a more robust codec often fixes it instantly. Keep the W4 and your phone on the same side of your body, and avoid stacking the W4 directly against a metal surface or a crowded USB hub.

Interference is the usual culprit behind choppy playback, not a defective amp. Test by walking into a different room or turning off other wireless devices nearby. If the stutter disappears, the problem was environmental, and repositioning the W4 is the fix rather than a repair.

• Re-test with a local file rather than a stream to rule out network buffering.
• If audio is delayed on video, look for a low-latency codec or a game mode in your phone's Bluetooth settings.

Step 5: Reconnect automatically next time

After a successful pairing, the W4 should reconnect to the last device when both are powered on and in range. If it connects to the wrong device, forget the W4 on that device so it stops claiming the connection. If it stops auto-connecting entirely, remove the pairing record on both sides and pair once more.

For a tidier setup, keep the W4 and its cable in a small case so the connector does not collect lint. A compact organizer keeps the amp, a spare cable, and eartips together, which matters more than it sounds once you start carrying the W4 daily.

• Label or note which output you use so you grab the right cable the first time.
• Charge the W4 the night before travel rather than relying on a partial charge.

Setup sequence at a glance

1. Charge and power on: Fully charge the HiBy W4, then hold the power control until it switches on. Checkpoint: a steady light means it is on, not yet pairing.
2. Enter pairing mode: Hold the pairing control until the indicator flashes in the pairing pattern. Mistake to avoid: a quick tap only toggles power.
3. Pair from your device: Scan in Bluetooth settings and select the HiBy W4, accepting any permission prompts. If it is missing, forget the old HiBy W4 entry and rescan.
4. Connect headphones: Plug into the matching output, source volume near 70 percent, then raise amp volume slowly. Checkpoint: both channels should be even before you judge the sound.
5. Verify codec and stability: Check the negotiated codec and switch to a more robust one if playback stutters. Reposition the W4 away from metal and crowded USB ports.
6. Confirm auto-reconnect: Power both off and on to confirm the W4 rejoins the right device. If it grabs the wrong device, forget the W4 on that device.

Gear that pairs well with this setup

• HiBy FD3: The HiBy FD3 is a USB DAC and headphone amp that connects to computers and smartphones, with 3.5mm single-ended plus 2.5mm and 4.4mm balanced headphone outputs. If you want wired rather than Bluetooth, the FD3 covers the same headphone plugs as a desktop-style chain and gives you a direct USB path from your phone or laptop.
• HiBy WG02 Wave Guided Liquid Silicone Eartips: The HiBy WG02 uses a standard tube design with a waveguide tube, skin-friendly anti-allergic silicone, and is listed for transparent sound and sound isolation. Better sealing on in-ear models means you hear more of the amp's output at lower volume, which reduces the hiss that sensitive IEMs can reveal.
• HiBy Accessories Organizer 18.5*11*3.5 BA04: The HiBy Accessories Organizer is a multi-device carry case measuring 18.5 by 11 by 3.5 cm, with storage for earbuds, a digital audio player, smartphone, cable, and adapter. A single case keeps the W4, its cable, and your headphones together so nothing gets left behind or crushed in a bag.

Pairing the HiBy W4 comes down to a full charge, a deliberate hold on the pairing control, and clearing stale Bluetooth records when something refuses to connect. Get those three right and your wired headphones will reconnect on their own from then on.