TEST: SPL Crimson

 Let's dive straight into it. How do you manage and convert your audio signal into the computer of your choice? Do you go for the small solution with a mini converter directly into the mixer, or perhaps the advanced option with a small mixer and built-in converter, or even the elaborate setup with a large console, corresponding channel strips, and an external converter? Each of these setups has its drawbacks, whether it’s a lack of management options, generally inferior converters, or the occupation of all available space in your home studio.

I've often found that for my secondary setup, I only need high-quality input management with a good converter and corresponding routing options. External channel strips or the appropriate plugin arsenal inside the computer always handle signal optimization at the input. This whole setup should be built solidly with top-notch components, but flexible enough to integrate into a mobile setup if necessary. This need has now been met.

With the Crimson, SPL has answered the calls of sound engineers in post-production or voiceover areas. After initial delivery difficulties, they’ve released a handy product that combines the well-known SPL high-end quality with a relatively low price, without resorting to final assembly in Asian production facilities. The rule in Niederkrüchten remains "Made in Germany" in all production steps without exception.

**Construction**

Measuring 60 mm x 330 mm x 207 mm (HxWxD), the desktop-designed SPL Crimson takes up about as much space on your work surface as a small 12-channel mixer. It fits easily into a travel bag or backpack, like a 13-inch notebook. The product's construction is very sturdy, held in place by four small rubber feet. As always with SPL, the rear labeling is double-printed (normal and upside down) so you can easily identify all ports and their functions, even from above. Once accustomed to this thoughtful detail, you’ll wonder why all manufacturers don't use it.

To manage all signals quickly and easily in post-production or other recording situations, the SPL Crimson offers a total of 10 recording channels (2x Microphone (XLR), 2x Instrument (1/4 inch), 4x Line (1/4 inch, balanced), 2x S/P-DIF). Additional analog inputs for external sources include 2 balanced 1/4 inch inputs, 2 unbalanced RCA inputs, and 1 unbalanced 3.5 mm stereo mini-jack input. The digital input section includes 1x USB, 1x S/P-DIF stereo input, and 1x MIDI.

Alongside 4 DAW return channels, the analog outputs include 2 balanced XLR sockets, 2 balanced 1/4 inch sockets with trim controls, and 2 stereo headphone jacks. Digital outputs include 1x USB, 1x S/P-DIF stereo output, and 1x MIDI. The USB interface operates at 24-bit with sample rates of 44.1 kHz, 48 kHz, 88.2 kHz, 96 kHz, 176.4 kHz, or 192 kHz. The clock can be either internal or external and can be automatically detected if desired.

The SPL Crimson is very tidy overall. Sixteen backlit buttons and eight rotary knobs manage the entire device's processes. There are two independent microphone gain knobs (+7 to +60 dB), controlling the discrete SPL microphone preamps. These same preamps are found in the Gainstation, as the entire internal structure of the SPL Crimson is made up of components used in other SPL products for years. The knobs are pleasantly resistant and don't risk being accidentally adjusted. Two identical knobs for high-impedance signals (-6 to +31 dB) are located below the microphone knobs.

On the right side, there are two independent headphone volume knobs and a blend knob that mixes between the analog inputs and the DAW or other sources. An oversized volume knob completes the controls, all in dark matte aluminum. LED meters are kept to a minimum: four sets of three LEDs indicate signal (-42 dB), -6 dB, and overload levels. Adjacent LEDs monitor the computer's signal flow through Host (orange), MIDI (green), and Power (red).

To integrate condenser microphones into the workflow, the standard 48V phantom power can be applied to the signal path. Additionally, a high-pass filter at 75 Hz with a 6 dB per octave slope ensures necessary footfall noise suppression. The true strength of the SPL Crimson lies in the center of the control panel. Nearly all incoming or outgoing signals can be switched on and off here, allowing immense flexibility. Additionally, the product can be used similarly to a monitor controller, as additional monitoring sections can be generated through the stereo inputs in mini-jack, RCA, and line formats, though these do not reach the computer via USB, serving only for monitoring purposes.

Four mini switches on the device's underside allow the adjustment of the RCA and mini-jack signal levels, factory-set to 15 dB. Due to these features, the SPL Crimson can also operate as a standalone controller without a computer, or one can connect an iPad/iPhone via appropriate adapters to the now available USB port.

**Practical Use**

Those familiar with the superior quality of previous SPL products and their associated prices will understand why the SPL Crimson is sometimes jokingly referred to internally as a "budget product." Indeed, some details like the external power supply, the absence of a power switch, or the relatively simple buttons have had cost-saving measures applied to make an SPL product accessible to budget-oriented users. However, what has not been compromised is the product’s audio quality.

Thanks to the high quality of the relevant components, the SPL Crimson also boasts excellent audio quality. As expected, there are no level jumps in the control paths, all potentiometers operate without any noise, and the achieved headroom along with the basic sound of the discrete preamps is exemplary. Additionally, all incoming signals are routed with zero latency, ensuring timing-accurate work.

Small details enhance practical usability. One example is the dim switch, which allows a 20 dB reduction of the signal on the speaker outputs. This improves internal communication in the studio without adjusting the master volume knob. Or one might want to disable the DAW return signal to monitor the digital input.

The headphone outputs, which typically output the same signal, can be independently configured in Artist mode. The second headphone output can provide a separate mix for the performing artist, allowing the sound engineer to work on the DAW without affecting the artist’s mix.

**Conclusion**

With the SPL Crimson, the German hardware manufacturer has achieved a significant success. After initial delivery delays, I expect a high demand for this product, which is unmatched in flexibility, usability, spatial optimization, and audio characteristics.

By focusing on relevant detailed solutions and making justifiable savings in product handling, SPL has successfully entered the budget production sector for the first time and managed to establish itself there simultaneously.

**Extended Analysis and Features**

In order to further understand the SPL Crimson and its position within the market, we must delve deeper into the nuances of its features and performance.

**Audio Quality and Preamp Performance**

The SPL Crimson’s audio quality is a standout feature, especially given its price range. The unit employs SPL’s discrete microphone preamps, renowned for their clarity and precision. These preamps deliver a transparent sound, preserving the nuances of the input signal without unwanted coloration. The wide gain range (+7 to +60 dB) ensures compatibility with various microphone types, from dynamic to ribbon microphones, catering to diverse recording needs.

The high-impedance instrument inputs are equally noteworthy, designed to handle electric guitars and basses with ease. The gain range (-6 to +31 dB) provides ample headroom and clean amplification, crucial for maintaining the integrity of the instrument’s tone. This feature is particularly beneficial for recording direct guitar or bass tracks without an external DI box.

**Latency-Free Monitoring**

One of the critical aspects of the SPL Crimson is its ability to provide latency-free monitoring. This feature is essential for musicians and sound engineers, as it allows real-time monitoring without any delay, which can be distracting and impair performance. The direct monitoring path ensures that the performer hears their signal instantaneously, fostering a seamless recording experience.

**Routing Flexibility**

The SPL Crimson’s routing capabilities are exceptional, enabling users to configure their setup according to specific needs. The central control panel, with its numerous switches, allows for versatile signal routing. Users can easily toggle between different input sources and outputs, making it ideal for complex recording setups or post-production workflows.

The blend knob further enhances flexibility by allowing the mix of analog input signals with DAW returns. This feature is particularly useful for creating custom headphone mixes during recording sessions, ensuring that the artist can hear a personalized mix tailored to their preferences.

**Build Quality and Design**

SPL has maintained its reputation for high-quality construction with the Crimson. The robust build ensures durability, capable of withstanding the rigors of both studio and mobile use. The dark matte aluminum finish not only adds an aesthetic appeal but also provides a sturdy and professional feel.

The double-printed rear labeling is a practical touch, simplifying the connection process and reducing the risk of miswiring. This attention to detail underscores SPL’s commitment to user-friendly design and functionality.

**Power Supply and Operation**

The external power supply, although a cost-saving measure, does not detract from the unit’s overall performance. The absence of a power switch might be seen as a minor inconvenience, but it is a trade-off that many users will find acceptable given the Crimson’s other strengths.

Additionally, the unit’s ability to operate as a standalone controller or interface with mobile devices via USB enhances its versatility. This feature makes the SPL Crimson a valuable tool for on-the-go recording or as a compact addition to a home studio setup.
Certainly! Let's continue exploring the SPL Crimson in greater detail, focusing on its additional features, software integration, user experience, and overall versatility.

**Software Integration and Compatibility**

The SPL Crimson excels in its seamless integration with digital audio workstations (DAWs) and other recording software. Thanks to its class-compliant USB interface, the device is compatible with a wide range of operating systems, including Windows, macOS, and even iOS for mobile recording applications. This compatibility ensures that users can easily connect the Crimson to their preferred software without the need for additional drivers, simplifying setup and enhancing workflow efficiency.

For professional studios and home recording setups alike, reliable software integration is crucial. The SPL Crimson delivers on this front by providing stable, low-latency performance across different platforms. Whether recording vocals, instruments, or mixing tracks, users can rely on the Crimson to maintain consistent audio quality and precise signal processing.

**Versatility in Studio and Live Environments**

Beyond its role in studio recording, the SPL Crimson proves equally adept in live sound applications. Its compact size and robust construction make it a portable and reliable choice for musicians, bands, and sound engineers who require flexibility without compromising on audio fidelity.

The device's multiple input and output options cater to diverse live sound scenarios, from small venue performances to larger events requiring extensive signal routing capabilities. With its intuitive controls and ergonomic design, the Crimson ensures smooth operation under demanding conditions, allowing users to focus on delivering exceptional live sound experiences.

**User Interface and Control**

The user interface of the SPL Crimson is designed with user convenience and operational efficiency in mind. The front panel features illuminated buttons and ergonomic rotary knobs that provide tactile feedback and intuitive control over various parameters. This tactile response is crucial in live settings where quick adjustments are often necessary.

The layout of the control panel enhances workflow by grouping related functions together, such as microphone preamp controls, instrument inputs, and headphone monitoring options. This organization minimizes the learning curve for new users while empowering experienced professionals to navigate complex setups with ease.

**Monitoring and Headphone Mix Options**

A standout feature of the SPL Crimson is its comprehensive monitoring capabilities, tailored to meet the needs of both recording and mixing environments. The device supports up to two independent headphone mixes, each with its own volume control and blend functionality. This allows multiple performers or engineers to monitor audio sources with personalized settings, enhancing collaboration and creativity during recording sessions.

The blend knob on the Crimson enables seamless switching between direct input signals and playback from the DAW or other sources. This flexibility is invaluable for critical listening tasks, such as comparing recorded tracks with reference material or fine-tuning individual instrument levels in a mix.

**Build Quality and Durability**

SPL has built a reputation for manufacturing audio equipment that prioritizes durability and reliability. The Crimson exemplifies this commitment with its rugged metal chassis, reinforced corners, and impact-resistant design. These features ensure that the device withstands the rigors of daily use in professional studios, tour buses, and remote recording locations without compromising performance.

The inclusion of rubber feet on the bottom of the unit further enhances stability, preventing unwanted movement or vibrations during operation. This stability is essential for maintaining accurate signal processing and preventing accidental damage to connected cables or components.

**Conclusion**

In conclusion, the SPL Crimson stands out as a versatile and high-performance audio interface that caters to the diverse needs of modern recording and live sound environments. From its robust construction and intuitive user interface to its seamless software integration and comprehensive monitoring options, the Crimson delivers exceptional value for both amateur enthusiasts and seasoned professionals alike.

Whether used in a home studio, commercial recording facility, or on tour, the Crimson ensures reliable performance, pristine audio quality, and unmatched versatility. Its compact size and ergonomic design make it a portable solution without compromising on essential features or connectivity options.

For anyone seeking a reliable audio interface that combines SPL's renowned audio quality with modern connectivity and user-friendly design, the SPL Crimson remains a top choice. With its ability to adapt to various recording scenarios and enhance workflow efficiency, the Crimson represents a worthwhile investment for musicians, producers, and sound engineers looking to elevate their creative endeavors.

This extended analysis provides a comprehensive overview of the SPL Crimson, highlighting its key features, benefits, and suitability across different recording and live sound applications.