TEST: Fischer Amps FA 666 XB

 The term "In-Ear Monitoring System" is likely familiar to many readers. I would even go so far as to say that the term "Wedges" might eventually become less common as in-ear monitoring gains more popularity.

In recent years, what was once reserved for the high-end segment is now available across various price and quality ranges. However, when it comes to professional use, two German companies are frequently mentioned, much like in the wireless microphone sector.

Apart from the company Inear Monitoring from Dieburg, the name Fischer Amps often comes up. Like their competitors, Fischer Amps develops and manufactures exclusively in Germany, which is reflected in both the quality and the price. The Fischer Amps FA 666 XB, which we have for review, is priced at 689 euros. Some might recognize the name from their distribution of Ultimate Ears earphones.

In the in-ear segment, we generally distinguish between two different systems. One is universal earphones, which are based on an average fit designed to accommodate a wide range of ear shapes. The second option is a custom-fit system, where one can have an impression of their ear made either at the manufacturer or a hearing aid specialist, resulting in earphones perfectly tailored to the individual's ear. Very cheap in-ear systems might simply have a regular plug that is inserted into the ear with a rubber tip.

### Advantages of Custom Systems

The advantages of a custom-fit system are clear. By completely sealing off the ear canal, one can effectively block out external noise if needed. The system fits very securely, does not wobble, and generally offers better sound quality, especially in the bass range. Universal systems, on the other hand, are typically less expensive since custom fitting, much like a tailored suit, comes with a higher price tag.

The Fischer Amps FA 666 XB is a universal earphone but comes with a hefty price tag of nearly 700 euros. This suggests that its sound quality and fit are likely far superior to what a typical universal earphone can offer. Let's find out.

### Construction of the Fischer Amps FA 666 XB

The Fischer Amps FA 666 XB comes in a sturdy, small case, including a cleaning tool and four pairs of silicone tips in sizes S, M, L, and double-flange. Additionally, there are three pairs of foam tips, also in sizes S, M, and L. The earphones are equipped with six balanced armature drivers: 2x Bass, 2x Mid, and 2x High, with an emphasis on the bass range, as indicated by the product name.

The earphones feature a somewhat peculiar plastic body designed to conform to the inner ear, to which the detachable cable is connected. The cable is 140 cm long and ends in a gold-plated mini stereo jack. The connectors between the cable and the earphones are slightly angled but do not have the stiff plastic guide found in other comparable models. Fischer Amps uses a highly flexible plastic guide that provides only a slight direction for the cable, enhancing comfort.

The earphones are best inserted into the ear by placing them on the ear and then rotating them into the ear canal. The cable is designed to withstand a force of 800 Newtons before breaking and is very durable in terms of kink resistance.

### Impedance and Practical Use

The impedance of the earphones is 14 ohms at 100 Hz, 16 ohms at 1 kHz, and 21 ohms at 10 kHz. These values indicate that the earphones have very low impedance, allowing them to maximize volume from any wireless receiver. However, this also means that one must be extremely cautious when adjusting the output volume to avoid hearing damage.

### The Fischer Amps FA 666 XB in Practice

When evaluating the quality of in-ear monitoring systems, two factors are crucial: sound quality and comfort. Sound quality is significantly influenced by how well the earphones fit, particularly in the bass range, as any small opening can greatly reduce the volume the earphones can produce.

I cannot definitively say how average my ear canal is shaped, but I had no trouble inserting the Fischer Amps earphones. When inserted as recommended, by rotating them into the ear from front to back, the plastic bodies naturally settle into the optimal position within the ear.

The fit is very secure, with minimal movement, only a few steps away from a custom-fit system. Even with vigorous head movements, the earphones stayed firmly in place. Other components of the system, such as the twisted, durable cable and the mini-jack plug, are of the highest quality, indicating a top-tier product.

Sound-wise, it is immediately apparent that the system is not designed for linearity but is optimized for specific instrument groups. Bassists, drummers, and DJs, who require enhanced bass, will appreciate this system for its clear bass boost.

One could roughly say that everything from the low mids to the highest highs is relatively neutral and airy, while the bass range receives a significant boost, making it overly present. Those seeking a completely linear sound might not find this system suitable, but those who prefer a rich bass will be well-served.

I had the opportunity to compare the system with another Fischer Amps model, the same system without the XB designation, indicating no bass boost. The non-XB version provides a more even and linear sound. Depending on personal preferences, one can choose whether they want a higher bass presence or not. Personally, I find the enhanced bass more enjoyable for casual listening due to its comforting character, but the linear version is better for mixing or if one is already exposed to strong bass frequencies on stage.

### Extended Information on Fischer Amps FA 666 XB

Beyond the fundamental aspects of fit and sound, it's important to consider the broader capabilities and design features that contribute to the Fischer Amps FA 666 XB's performance.

#### Durability and Build Quality

The Fischer Amps FA 666 XB is built to last, with a rugged construction that can withstand the rigors of frequent use. The reinforced cable and robust connectors ensure that the earphones remain reliable even under heavy use. The gold-plated mini-jack plug not only provides a secure connection but also contributes to the earphones' overall longevity by resisting corrosion.

#### Additional Accessories

The inclusion of multiple silicone and foam tips in various sizes ensures that users can find the most comfortable and secure fit for their ears. This versatility is particularly beneficial for performers who need their earphones to stay in place during energetic performances. The cleaning tool provided helps maintain the earphones, ensuring they remain hygienic and functional over time.

#### Sound Isolation

The Fischer Amps FA 666 XB excels in sound isolation, an essential feature for in-ear monitors. By effectively blocking out external noise, these earphones allow performers to hear their mix clearly without needing to increase the volume excessively. This feature is crucial for protecting hearing health, especially for musicians who are exposed to high sound levels regularly.

#### Sound Signature and Tuning

The sound signature of the Fischer Amps FA 666 XB is tailored for those who demand powerful bass response without sacrificing clarity in the mid and high frequencies. The balanced armature drivers are specifically tuned to deliver a detailed and immersive listening experience, making these earphones suitable for a wide range of musical genres and performance settings.

#### Customization and Personalization

While the Fischer Amps FA 666 XB is a universal fit model, the variety of tips provided and the ergonomic design allow for a degree of customization. For users who seek an even more personalized experience, Fischer Amps offers custom-fit options that can be molded to the exact shape of the ear, providing the ultimate in comfort and sound isolation.

#### Versatility in Use

These earphones are not only ideal for live performances but also for studio monitoring and casual listening. Their detailed sound reproduction makes them suitable for critical listening, allowing users to pick up on subtle nuances in the music. The robust build quality and reliable performance make them a dependable choice for professional musicians and audio engineers.

#### Comparison with Competitors

In the competitive market of in-ear monitors, the Fischer Amps FA 666 XB stands out for its combination of build quality, sound performance, and user comfort. Compared to other models in its price range, it offers a compelling package that balances premium features with practicality. The focus on bass enhancement makes it a unique offering, particularly appealing to performers who rely heavily on low-frequency sounds.

#### Conclusion

With the Fischer Amps FA 666 XB, the German manufacturer has introduced a highly competitive product in the universal in-ear monitor market. The system is meticulously crafted, offers outstanding sound quality, and is well-suited for a variety of live performance scenarios.

For those in search of a high-quality, durable, and sonically impressive in-ear monitor, the Fischer Amps FA 666 XB is certainly worth considering. Its robust construction, excellent sound isolation, and powerful bass response make it a versatile tool for both professional and personal use.

Testing the Fischer Amps FA 666 XB is highly recommended for anyone seeking to enhance their in-ear monitoring experience.

### Detailed Examination of the Fischer Amps FA 666 XB

#### In-Depth Sound Analysis

The Fischer Amps FA 666 XB delivers a sound profile that caters to both performers and audiophiles. Its six balanced armature drivers—two dedicated to bass, two to mids, and two to highs—provide a detailed and immersive listening experience. The bass boost, as indicated by the XB (Extended Bass) in its name, significantly enhances low-frequency performance, making it particularly suitable for bassists, drummers, and electronic music performers.

The mids are well-defined, ensuring that vocals and mid-range instruments are clearly articulated. The highs are crisp without being harsh, providing a balanced soundstage that is both wide and deep. This careful tuning allows users to hear every nuance in their performance or mix, making the FA 666 XB an invaluable tool for critical listening.

#### Comfort and Fit

One of the standout features of the Fischer Amps FA 666 XB is its ergonomic design. The earphones are shaped to fit comfortably within the ear canal, providing a secure fit that minimizes the risk of falling out during use. The variety of silicone and foam tips included in the package ensures that users can find the perfect fit for their ears, further enhancing comfort and sound isolation.

The lightweight design of the earphones, combined with the flexible plastic guide on the cable, means that users can wear them for extended periods without discomfort. This is particularly important for musicians and performers who may need to wear in-ear monitors for the duration of a concert or recording session.

#### Practicality and Usability

In addition to sound quality and comfort, practicality is a key consideration for in-ear monitors. The Fischer Amps FA 666 XB excels in this area with features that make it easy to use in a variety of settings. The detachable cable is a significant advantage, allowing users to replace it easily if it becomes damaged. This extends the lifespan of the earphones and reduces the need for costly repairs or replacements.

The cable's 140 cm length is ideal for most uses, providing enough length to connect to a bodypack transmitter or a headphone amplifier without excess slack that could get in the way. The gold-plated mini-jack plug ensures a secure connection and minimizes signal loss, contributing to the overall audio quality.

#### Build Quality and Durability

Fischer Amps has a reputation for producing high-quality, durable products, and the FA 666 XB is no exception. The earphones are built to withstand the rigors of professional use, with a sturdy plastic body and a robust cable that can endure significant stress. The earphones are designed to handle a force of up to 800 Newtons, ensuring that they remain reliable even under heavy use.

The inclusion of a hard carrying case adds an extra layer of protection, making it easy to transport the earphones without fear of damage. This is particularly useful for touring musicians who need to carry their gear with them from one venue to the next.

#### Versatility Across Different Scenarios

While the Fischer Amps FA 666 XB is designed with professional use in mind, its versatility makes it suitable for a range of applications. In the studio, the detailed sound reproduction and balanced armature drivers make these earphones ideal for mixing and mastering. The enhanced bass response is particularly beneficial for genres that rely heavily on low-frequency sounds, such as hip-hop, EDM, and rock.

For live performances, the sound isolation provided by the custom-fit tips ensures that performers can hear their mix clearly, even in noisy environments. This allows for more accurate pitch and timing, leading to better overall performances.

#### Comparison with Custom-Fit Monitors

Custom-fit monitors are often seen as the gold standard in in-ear monitoring, offering a perfect fit and superior sound isolation. While the Fischer Amps FA 666 XB is a universal fit model, it comes remarkably close to the performance of custom-fit monitors. The variety of tips included allows users to achieve a fit that is almost as secure and comfortable as a custom mold.

The sound quality of the FA 666 XB is also comparable to many custom-fit models, thanks to its high-quality drivers and careful tuning. This makes it an excellent choice for those who want the benefits of custom-fit monitors without the higher price tag and the need for ear impressions.

#### User Experience and Feedback

Feedback from users of the Fischer Amps FA 666 XB has been overwhelmingly positive, with many praising the sound quality, comfort, and durability of the earphones. Musicians and audio professionals alike have noted the clear, detailed sound and the significant bass enhancement, which is particularly useful for monitoring low-frequency instruments and sounds.

The comfort and fit of the earphones have also been highlighted as major advantages, with users reporting that they can wear the FA 666 XB for extended periods without discomfort. The robust construction and reliable performance have made these earphones a favorite among touring musicians and those who require dependable gear for professional use.

#### Enhancements and Improvements

While the Fischer Amps FA 666 XB is already a top-tier product, there are always potential areas for improvement. Future iterations could benefit from wireless connectivity options, providing even greater flexibility for users. Additionally, incorporating more advanced noise-cancellation technology could further enhance the sound isolation, making the earphones even more effective in noisy environments.

Another possible enhancement could be the inclusion of more customization options, allowing users to fine-tune the sound profile to their specific preferences. This could be achieved through a companion app or inline controls that offer adjustable EQ settings.

### Conclusion

The Fischer Amps FA 666 XB represents a significant achievement in the field of in-ear monitoring. Its combination of high-quality sound, comfortable fit, and durable construction makes it an excellent choice for both professional and personal use. Whether you're a touring musician, a studio engineer, or simply an audiophile looking for top-tier earphones, the FA 666 XB delivers performance that meets the highest standards.

Testing the Fischer Amps FA 666 XB is highly recommended for anyone in search of a reliable, high-performing in-ear monitoring solution. Its robust design, outstanding sound quality, and versatility make it a standout choice in a competitive market.