Best Headphone Amps With Optical Input

A headphone amp with an optical input can connect directly to a TV, game console, or other digital source without relying on a computer’s audio output. The right model depends on more than optical compatibility: consider the headphones you own, the outputs you need, and whether you want simple volume control or a more flexible desktop setup. These five picks range from compact, budget-minded options to feature-rich balanced DAC/amps.

Our Picks: Best Headphone Amps With Optical Input reviews

Fosi Audio K5 Pro: A gaming-friendly DAC amp with tone controls

The K5 Pro combines a digital-to-analog converter and headphone amplifier in a compact desktop unit. It accepts optical, coaxial, and USB-C audio, then sends analog sound to headphones through its 3.5 mm output or to speakers and other equipment through RCA. Its optical input supports up to 24-bit/192 kHz audio.

For gaming, the front-panel microphone connection and included headphone splitter make it a practical option for a headset setup. Bass and treble knobs let you adjust the sound without opening software, while the volume control also handles power and input selection. The product information lists output for headphones from 16 to 300 ohms, with power varying by headphone impedance.

The K5 Pro is a straightforward pick if you want optical connectivity, a mic input, and basic tone controls without paying for balanced outputs or a screen. Its main limitation is that it offers a 3.5 mm headphone connection rather than the additional balanced headphone outputs found on some larger desktop models.

Pros:

• Optical, coaxial, and USB-C inputs
• Mic input and included headphone splitter suit gaming use
• Bass, treble, and master-volume controls are built in
• RCA output can connect to powered speakers or another amplifier

Cons:

• Does not offer balanced headphone outputs
• The 3.5 mm headphone connection may not suit every desktop setup

Verdict: Choose the K5 Pro if you want a compact optical DAC/amp with a mic input and hands-on sound controls for gaming or everyday listening.

Fosi Audio ZH3: A versatile choice for headphones and speakers

The ZH3 is a desktop DAC, headphone amp, and preamp designed to handle several kinds of audio setups. Its inputs include optical, coaxial, USB, and RCA, while its outputs include 4.4 mm and 6.35 mm headphone connections plus RCA and XLR for other equipment. That range makes it more adaptable than a basic optical-to-headphone amplifier.

It has both single-ended and balanced headphone outputs, with a three-level gain switch for headphones in the 16-to-300-ohm range. The listed output is higher from the 4.4 mm balanced connection than from the 6.35 mm output, so it may appeal to people who already use balanced headphones or plan to build a more flexible desktop system. A screen, bass and treble adjustment, and six filter types add control over operation and sound.

This model is a strong fit if you want one device to serve headphones and powered audio equipment. Keep two details in mind: the listed EQ applies to headphone output, not the preamp outputs, and the RCA and XLR output levels differ. Its broader feature set may be more than you need if you only want to connect one optical source to standard headphones.

Pros:

• Optical, coaxial, USB, and RCA inputs
• Balanced 4.4 mm and single-ended 6.35 mm headphone outputs
• RCA and XLR outputs support speaker and preamp setups
• Gain settings, EQ controls, and selectable filters

Cons:

• Its many features may be unnecessary for a simple headphone setup
• EQ does not apply to the preamp outputs

Verdict: Pick the ZH3 if you want optical input as part of a flexible desktop system with balanced headphone and speaker connections.

AIYIMA DAC-A2: A compact, simple DAC with front-panel controls

The DAC-A2 converts optical, coaxial, or USB digital audio into analog output for headphones or an audio system. It has a 3.5 mm output and RCA outputs, plus front-panel knobs for volume, bass, and treble. The aluminum-alloy chassis and compact format make it a practical choice for a desk where a larger control unit would be in the way.

AIYIMA lists optical and coaxial support up to 24-bit/192 kHz, and the amp is rated at 160 mW RMS at 32 ohms. The stated headphone range is 16 to 200 ohms. It uses a DC 5V power input, and the package includes a USB cable and optical cable, so check that the included connection and your power arrangement suit your setup.

The DAC-A2 has fewer connection and output options than the Fosi ZH3, K7, or FiiO K7. It also lacks a microphone input and balanced headphone output. In return, it keeps the controls and connections simple, which can be appealing if you want optical audio, analog outputs, and basic tone adjustment without a complex interface.

Pros:

• Optical, coaxial, and USB inputs
• Bass, treble, and volume controls on the front
• 3.5 mm and RCA analog outputs
• Compact metal chassis and included optical cable

Cons:

• No balanced headphone output or microphone input
• Its stated headphone range tops out at 200 ohms

Verdict: The DAC-A2 is a sensible choice for a basic optical desktop setup if you want physical tone controls and do not need balanced outputs or extra features.

Fosi Audio K7: A control-rich desktop DAC amp with Bluetooth

The Fosi Audio K7 is a desktop DAC and headphone amp with optical, coaxial, USB-C, and Bluetooth inputs. It also includes a 3.5 mm microphone input, making it a versatile option for music, work, and gaming. Its outputs include 4.4 mm balanced, 3.5 mm single-ended, and RCA connections.

Its front panel is designed for hands-on operation, with two large control knobs, shortcut buttons, and a display that shows operating status. Fosi lists support for PCM up to 384 kHz/32-bit and DSD256, as well as output power up to 2100 mW. Those specifications and the two headphone output types give it room to serve different headphones and desk arrangements.

The K7 adds more connection choices and a display than the K5 Pro, but it also takes a more feature-heavy approach. If you only need optical input and a standard headphone output, its extra controls, Bluetooth, and balanced connection may not be necessary. The supplied product information does not specify an impedance range, so check compatibility with your headphones if that is an important buying factor.

Pros:

• Optical, coaxial, USB-C, and Bluetooth inputs
• 4.4 mm balanced, 3.5 mm, and RCA outputs
• Includes a microphone input and front-panel display
• Dual knobs and shortcut buttons provide direct control

Cons:

• May be more complex than needed for a basic optical setup
• Headphone impedance range is not specified in the supplied details

Verdict: Choose the K7 if you want optical input alongside Bluetooth, multiple headphone connections, and an information display for a versatile desktop system.

FiiO K7: A balanced DAC amp for demanding headphone setups

The FiiO K7 is a desktop DAC and headphone amplifier with USB, optical, coaxial, and AUX inputs. Its output options include a 4.4 mm balanced connection and 6.35 mm and 3.5 mm single-ended connections. RCA output adds a way to connect other audio equipment, making the K7 suitable for more than one source or listening setup.

FiiO lists dual AK4493SEQ DACs and dual THX AAA 788+ amplifier sections, with support for PCM up to 384 kHz and DSD256. The supplied specifications also list 2000 mW stable output power. A two-level gain setting and three output levels let you adjust operation for your headphones and preferred listening setup.

The K7 is worth considering if you want substantial output capability and plan to use balanced headphones. Its multiple input and output choices make it more flexible than a small, single-output amp, but there are fewer sound-shaping features listed than on the Fosi ZH3. If you do not need balanced connections or the extra inputs, a simpler model may be a better fit.

Pros:

• Optical, coaxial, USB, and AUX inputs
• 4.4 mm balanced and 3.5 mm/6.35 mm single-ended outputs
• Listed 2000 mW stable output power
• Gain and output-level settings for setup flexibility

Cons:

• May be more than you need for one optical source and standard headphones
• Does not list the bass and treble controls found on some competing models

Verdict: The FiiO K7 is a strong option if you want optical connectivity, multiple input choices, and a balanced output for a capable desktop headphone setup.

How to Choose a Headphone Amp With Optical Input

Check that optical is the right connection for your source

Optical is useful when your TV, console, or other source has a digital optical output and you want the amp to handle the digital-to-analog conversion. Before buying, confirm that your source has an optical output—not just an optical input—and check its audio-output settings. Also make sure you have the right cable and can reach the amp from your source.

Match the output to your headphones

Look at your headphones’ connector, impedance, and power needs. A 3.5 mm output can suit many everyday headphones, while a 6.35 mm connection is common in desktop audio and a 4.4 mm output supports compatible balanced headphones. Check the product’s stated headphone range and output power rather than assuming every amp will drive every pair equally well.

Decide whether you need balanced connections

Balanced outputs are useful only if your headphones have a compatible balanced cable. They can offer more output power on some models, but they are not required for ordinary listening. If you use standard headphones, a quality single-ended output may be all you need. Consider balanced support when you already own compatible gear or want that option for a future setup.

Choose the inputs and outputs you will actually use

Optical input is the focus, but extra connections can make an amp more useful. USB can serve a computer, coaxial can connect another digital source, and Bluetooth can add wireless playback on models that support it. RCA or XLR outputs are useful if you also plan to connect powered speakers or other audio equipment. Avoid paying for features that do not fit your setup.

Consider controls and sound adjustments

Physical volume, bass, and treble controls can make quick adjustments easy, especially at a desk or while gaming. A screen and selectable filters can offer more control, but also add complexity. If you prefer a simple setup, look for clear input selection and volume control first. If you want to tailor the sound, compare the available EQ and filter features carefully.

Think about gaming and microphone needs

A microphone input can be helpful if you want to use a headset for voice chat, but not every DAC amp includes one. The K5 Pro and Fosi K7 list microphone inputs; the other supplied product details do not. Check how your microphone and headphones connect before choosing, since a headphone output and a mic input serve different purposes.

Frequently Asked Questions

What does an optical input do on a headphone amp?

An optical input accepts digital audio from a compatible source, such as a TV or other device with an optical audio output. The DAC amp converts that signal to analog audio for headphones or connected equipment.

Can I connect a TV to one of these headphone amps?

You can if the TV has an optical audio output and the amp has an optical input. Check the TV’s output settings and the amp’s supported audio formats before connecting, and make sure you have an optical cable.

Do these amps work with a computer?

Several models also list USB inputs, while the AIYIMA DAC-A2 and Fosi K5 Pro are described for computer use. If you plan to connect by USB, confirm which input and cable your computer supports. Optical can also work if your computer has a compatible optical output.

Do I need a balanced headphone output?

No. Balanced output is optional and requires headphones with a compatible balanced cable. If your headphones use a standard 3.5 mm or 6.35 mm connection, choose a model with the matching single-ended output.

Which option includes a microphone input?

The Fosi Audio K5 Pro and Fosi Audio K7 list a 3.5 mm microphone input. The other product details here do not specify a mic input, so they may not suit a setup where connecting a microphone to the DAC amp is important.

Which model is best for connecting speakers as well as headphones?

The Fosi Audio ZH3 offers RCA and XLR outputs alongside its headphone connections. The K5 Pro, K7, AIYIMA DAC-A2, and FiiO K7 also list RCA output, but compare the exact connections to your speakers or amplifier before choosing.

Conclusion

For a gaming-oriented setup with optical input, tone controls, and a microphone connection, the Fosi Audio K5 Pro is a focused choice. The Fosi Audio ZH3 stands out for connection flexibility and balanced outputs, while the AIYIMA DAC-A2 keeps things simple. Choose the Fosi K7 for its wide feature set and the FiiO K7 if balanced headphone output and multiple inputs are priorities. Before ordering, match the amp’s inputs and outputs to your source, headphones, and any speakers you plan to connect.