Computer Station Nation is reader-supported.
When you buy through links on our site, we may earn an affiliate commission. Learn more.
Once you get past “does it play sound,” desktop speakers have a surprising number of features worth understanding. Here’s what actually matters among the advanced options.
Built-in DAC (Digital-to-Analog Converter)
A DAC converts the digital audio signal from your PC into an analog signal your speakers can amplify. Most desktop speakers use your motherboard’s onboard DAC when connected via 3.5mm. USB speakers have their own built-in DAC that bypasses the motherboard entirely.
Why it matters: onboard audio quality varies wildly between motherboards. Budget boards often have noisy DACs that introduce audible hiss or interference. A USB speaker with its own DAC removes that variable entirely. The Logitech S150 is a cheap example; the Audioengine HD3 at the premium end includes a 24-bit DAC that’s genuinely excellent.
THX certification
THX is a real audio standard — not just branding. To earn certification, speakers have to pass objective benchmarks for frequency response accuracy, distortion at reference levels, and bass extension. The Logitech Z623 is the most accessible THX-certified desktop speaker system. It means the audio engineer’s intended mix is what you actually hear.
Bi-amplification
Standard speakers use a single amplifier for the full frequency range, then a crossover network splits it to the tweeter and woofer. Bi-amplified speakers use separate amplifiers for the high and low frequency drivers. The result: less distortion because each amp only handles the frequencies it’s optimized for. You’ll see this in higher-end desktop monitors — Audioengine uses bi-amped designs in their A2+ and HD3.
Frequency response and what the specs mean
Every speaker publishes a frequency response range (e.g., “50Hz–20kHz”). The number alone tells you very little. What matters is how flat that response is — a speaker that stays within ±3dB across its rated range is much better than one that “technically” covers 50Hz but drops 15dB at that frequency.
Budget consumer speakers rarely publish tolerance specs. Premium speakers (studio monitors especially) publish ±3dB or ±1.5dB ranges. If you’re evaluating speakers for accuracy, look for the tolerance spec, not just the range.
Optical and RCA inputs
Most budget desktop speakers are 3.5mm only. Step up in price and you get RCA inputs (left/right analog connection), which allow you to connect a wider range of source devices — consoles, TVs, CD players, dedicated DACs. The Logitech Z623 has both RCA and 3.5mm. Optical (TOSLINK) input appears on some mid-range and premium desktop speakers and carries a digital signal for another way to bypass motherboard audio.
DSP (Digital Signal Processing)
Some speakers include onboard DSP for features like room correction, bass management, EQ presets, or loudness compensation. The Audioengine HD3 has a mobile app for EQ control. Edifier’s higher-end models include DSP-driven room correction. For most desk setups, onboard DSP is a nice-to-have — speaker placement and room treatment do more for sound quality than DSP can compensate for.
Which advanced features are actually worth paying for?
For a gaming battlestation: USB audio (bypasses weak onboard DAC) and a 2.1 system with a real subwoofer are the two upgrades with the most audible impact per dollar. THX certification is a genuine quality marker if you’re spending $150+. Bi-amplification and advanced DSP are worth caring about only once you’re in the $200+ range and optimizing for audio accuracy.
