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Bi-wiring vs bi-amping: Which will upgrade your sound?

Going down the rabbit hole of audio fidelity means coming across the terms bi-wiring and bi-amping. These are two techniques that can help you make the most of, or upgrade, your sound system, bringing to life a soundscape that’s more defined and transparent.

Understanding whether bi-wiring or bi-amping is best for you requires taking into account a series of factors, from your budget to the sonic outcome you envision, so in this article, I’ll explain the differences between these two techniques and discuss who should opt for one approach or the other.

Behind the insights

Marco Sebastiano Alessi, author and contributor at Higher Hz

I’m an audiophile and audio engineer with over a decade of experience in the music industry and a passion for high-quality gear for audiophiles and music enthusiasts.

When using and evaluating audio equipment, my focus is on achieving great transparency in sound reproduction while also ensuring an immersive and emotionally engaging listening experience.

I often use high-end equipment for deep-listening sessions and meticulously assess the frequency response of my sound system across the audio spectrum.

Bi-wiring and bi-amping: A brief explanation

Both bi-wiring and bi-amping are commonly used to improve the clarity and fidelity of audio reproduction.

When bi-wiring a speaker, you use two separate sets of cables to connect it to an amplifier. Speakers that allow bi-wiring have two sets of binding posts, one for the treble and one for the bass.

The goal of bi-wiring is to provide each section of the speaker with dedicated wiring: one for the high frequencies (treble) and the other for low frequencies (bass).

This separation helps reduce any potential interference between the two signals as they travel from the amplifier to the speaker. While not everyone agrees this technique leads to improved sonic reproduction, bi-wiring should result in a clearer and more defined sound.

bi-wiring and bi-amping speakers
Image: Fluance

Bi-amping requires using two amplifiers for a single speaker: one amplifier powers the treble, while the other takes care of the bass.

This means that each frequency range receives dedicated (and tailored) power, which can result in a more dynamic sound with better control over each frequency range, as treble and bass frequencies are managed independently.

When talking about bi-amping, we’re mostly talking about passive bi-amping, as the crossover section of your speaker is handling the frequency separation. Active bi-amping bypasses the speaker’s internal crossover and uses an external crossover network before the signals reach the amplifiers. It’s a complex setup and not widely available.

With passive bi-amping, your speakers will have much more power at their disposal: the two amplifiers will work in unison to bring to life a powerful and clear sonic reproduction.

Bi-wiring: Installation and setup

The idea here is to use two sets of speaker cables for each speaker, so start by connecting one end of a speaker cable to the amplifier’s output terminals and then attach the other end to the speaker’s treble or high-frequency binding posts.

speaker bi-wiring schema
Speaker bi-wiring diagram | Image: Fluance

Next, using the second speaker cable, repeat the process, connecting it from the same amplifier output but this time to the speaker’s bass or low-frequency binding posts. Now, each section of the speaker should have its dedicated wiring.

Bi-amping: Installation and setup

Instead of separating the signal, as in bi-wiring, with bi-amping you separate the power between two amplifiers: one amplifier powers the high frequencies, while the other powers the bass frequencies.

To do so, connect the high-frequency amplifier outputs to the upper set of terminals of your speakers and the low-frequency outputs to the lower set of terminals.

speaker bi-amping schema
Speaker bi-amping diagram | Image: Fluance

When bi-amping, it’s crucial to ensure the correct connections: one amp should be connected strictly to the treble binding posts and the other to the bass. It’s also essential to match the amplifiers’ power output to the speakers’ requirements to avoid overdriving the speaker.

Bi-wiring: Pros and cons

Discussions around bi-wiring have been going on for years within the audiophile community: some claim the difference in audio quality is drastic, while others believe it’s all nonsense.

Personally, I think it’s an approach worth considering if you want to experiment with and enhance your sound system.

Pros of bi-wiring

  • Potential sound improvement. By having distinct cables for treble and bass, you should be able to reduce interference between high and low-frequency signals.
  • Enhanced signal path. With two cables, you could reduce distortion and improve overall sound fidelity.
  • Relatively low-cost upgrade. If you already have speakers with dual binding posts, the only additional expense is an extra set of cables.

Cons of bi-wiring

  • Subtle, sometimes barely audible difference. Many argue that the difference in performance is negligible.

Bi-amping: Pros and cons

By using two amplifiers to power the treble and bass separately, bi-amping is a great way to upgrade your sound system. However, it’s not all sunshine and rainbows.

Pros of bi-amping

  • Improved dynamic range. With dedicated amplifiers for different frequency ranges, there’s more headroom available, which means a more dynamic sound.
  • Reduced distortion. Since each amplifier only needs to handle a specific frequency range, you get cleaner amplification.
  • Flexibility. Bi-amping allows you to potentially mix and match amplifiers based on their characteristics.

Cons of bi-amping

  • Extra cost. You’re getting an extra amplifier, and they’re usually not cheap.
  • Complex setup. Bi-amping requires more fine-tuned setup and calibration, as both amplifiers need to have matching gain and volume levels to avoid imbalances.

Assessing which one is best for you

There are three aspects to consider when choosing the best option for your needs: budget, audio requirements, and system complexity.

Bi-wiring is affordable as it only requires an additional set of speaker cables, while bi-amping can be pricey since you’ll have to buy an extra amplifier compatible with your existing system.

In terms of sound, bi-wiring might be a good option if you aim for clearer differentiation between frequency ranges. Bi-amping, on the other hand, is the way to go if you want better control over specific frequencies, reduced distortion, and a more powerful performance.

Finally, adding an extra amplifier might complicate your setup, especially because you’ll have to fine-tune your system and ensure everything works seamlessly.

As you can see, there is no one-size-fits-all solution here, but if this is your first experiment in upgrading your system, I’d first give a try at bi-wiring and then eventually invest in a second amplifier to upgrade the hi-fi system.

Final thoughts

I hope this article has helped you define whether bi-amping or bi-wiring is the right option for you!

Whichever you choose, both techniques have the potential to enhance your sound system, and experimenting with them can be a great way to explore new sonic possibilities and bring your music collection to life.

Happy listening!