FRFR- versus analog speakers explained

A “FRFR speaker” stands for “Full Range Flat Response” speaker which, according to an analog speaker, is completely different. We will explain this in simple words.
FRFR speakers reproduce the full frequency range of sound by Impulse Response without coloring the signal.

In other words, an FRFR speaker aims to produce sound as accurately and neutrally as possible.

FRFR speakers are playing the sound exactly as it’s digitally processed. Without adding extra effects, or changes (cuts or boosts in the EQ) to the tone.
It’s a great choice for users of digital setups who want a true sound. Think of Kemper, Fractal Audio Axe-FX, Line-6 Helix users.

Kemper profiler, great for use with a FRFR speaker cabinet and analog speaker as well.

FRFR sound versus Cabinet sound

A speaker cabinet for guitar or bass, whether it has an open- or closed back, definitely has character in anyway.
Natively a FRFR should have no character of its own.
Instead, your device will use speaker profiles, most often in the form of Impulse Response files; These are created by recording the real amplifier cabinet in specific ways to build a cabinet simulation or so-called “cab sim”.

Built in amp

The signal that comes out of the amp and cab sims is a line level signal. This means that it can drive headphones, but not a speaker system without some power being delivered.
FRFR speakers have built-in solid-state power amplifiers. They’re built to have no unique audio flavor or texture. This means that the frequency response of the amplifier is flat.

FRFR-speaker cabinet from GR-Guitar. These speakers are famous for their super light weight, up to almost 13 Lbs.

Pros and cons of FRFR speakers explained:

Pros:

Because FRFR speakers deliver a flat frequency response, they’re ideal for digital modelers and amp simulations. The definition of flat frequency response is, that the curve is a relatively straight line on a frequency response graph; In short: no cuts or boosts in the audio signal.
FRFR speaker cabinets can handle a wide range of instruments and sounds, not just electric guitars or basses, but also other instruments, vocals, and backing tracks, which makes them versatile for live performances or studio setups.
If you’re using amp simulators or digital modelers (e.g., Kemper, Axe-FX, Helix etc.), FRFR speakers give a true representation of the sounds you dial in, without altering them like traditional amps might.
Many FRFR speakers are lightweight and compact compared to traditional full-stack or combo amps, making them easier to transport for gigs or rehearsals.
FRFR speakers don’t color the sound, so you have more control over your tone when using digital processors. You hear exactly what you’re inputting into the system.

Cons:

FRFR speakers are designed to be neutral, they lack the “character” or “warmth” that traditional guitar amps with speakers. Some musicians might prefer the natural coloring of an analog amp.
For certain genres (e.g., rock, metal, country), musicians may prefer the natural distortion and tonal characteristics that traditional amps provide, which FRFR speakers might not replicate as effectively.
FRFR speakers are very transparent, you might need to spend more time tweaking your digital modeler to get the desired tone, especially if you’re accustomed to traditional amps where tone is shaped by the amp’s natural coloration.
High-quality FRFR speakers, especially those designed for professional use, can be quite expensive, sometimes approaching or exceeding the cost of traditional amplifiers.
Some musicians feel that FRFR speakers may not project the same volume and stage presence as a traditional amp with a speaker cabinet, especially if they’re looking for that “amp-in-the-room” feel.

Fractal Audio – Axe-FX III

What means IR (impulse response)?

IR is a sonic measurement of the sound of a speaker, room or microphone in relation to a sound source, read amp.

After your guitar, the dialed-in amp tone, there’s a lot more that can affect the sound. Think of the speaker type, the room you’re in, the microphone used etc. etc.

The idea of IR is to capture all of that information in one go, so you can instantly recall that setting. This means that wherever you are, you can retain your preferred tone, right down to the detail of your favorite mic placement and room sound. Anywhere you are.

How flat is the “flat frequency response” in real?

Well, in my opinion, when the coming out signal is a real flat frequency, why are there different brands of FRFR speakers. The one brand is better than the other when you read people’s reviews.
It seems that, in fact, all FRFR-speakers have their own character of flat frequency response.

Of course, there’s a variety of FRFR-speaker in terms of quality, wattage, weight, size and speaker configuration, active- or passive.

Conclusion about “flat frequency response”

Some FRFR speakers may emphasize certain frequencies or have slight tonal coloration, even though they’re designed to be flat.
For live and studio use FRFR-speakers may be great if you play different styles of music.
But when you play a certain style and your main amp is a profiler or modeler, I would advise to use your favorite analog open-, or closed back cabinet.

Light weight & portable FRFR-Go! speaker from Headrush.

FRFR vs Open-Back combo Amp

Most combo amps, especially the open-back models, have a certain signature sound.
Fender amps are known for their warm and rich tones, especially when playing clean or mildly overdriven.
This could be done with humbucker pickups as well as with single coil pickups in your guitar.

An open-back speaker has a more diffuse sound because of the lack of a rear enclosure, and it tends to be “airier” with a wider soundstage. A FRFR speaker, could mimic this sound by adjusting EQ settings, using specific mic’d-up open-back speaker IRs, and experimenting with the spatial settings.

When comparing an FRFR speaker to an open-back combo amp, there are a few important factors to consider, as each option serves a different purpose and appeals to different types of players. Here’s a breakdown of the key differences:

Break down

Choose an FRFR speaker if you’re using a digital modeler and want a versatile, transparent sound reproduction that works across various instruments and genres.
It’s perfect for musicians who value consistency and flexibility with their digital setup.
Choose an open-back combo if you prefer that typical tone these amps are known for. It’s ideal for guitarists who want a more tactile, organic sound and a traditional amp experience without relying on modelers.

So, while an FRFR speaker can emulate the sound of an open-back speaker cab through software, the physical experience (like the movement of air and direct sound projection) might differ. It’s more about capturing the tonal qualities via IRs or speaker simulations, which can get quite close!

Ultimately, the decision comes down to your personal preferences, playing style, and whether you prefer analog or digital gear.

Closed- versus open-back speaker cabinets

When you are not familiar with the difference between open- or closed-back speakers, please check the difference between open- and closed-back speaker cabinets.

Conclusion:

FRFR speakers are fantastic for those using modern digital modelers and looking for clear, accurate sound reproduction. However, if you’re someone who loves the tonal color and warmth of traditional amps or prefers a more dynamic, “live” sound, you might find FRFR speakers less appealing. It all comes down to your sound preferences and setup needs.

Guitar picks and how they have a huge influence on your sound and playing.

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About the author
Hi, my name is Eppo Franken and I started to make my own picks in the mid ’80’s.
In 2010 my wife Jolanda and I started ChickenPicks guitar picks, because we’d like to see if others would enjoy them as well.

I play guitar since 1980 and my favorite style is country chicken picking and some kinds of rockabilly and americana.
Send us an e-mail and let’s talk about guitar tone and pick.

FRFR- versus analog speakers explained