The Solid State Logic (SSL) SSL 2+ and SSL 2 USB-C Audio Interfaces are both high-quality interfaces designed for professional and home studio recording. They share several core features but also have some key differences that set them apart.
The SSL 2+ is an enhanced version of the SSL 2, offering additional connectivity options that make it more versatile for various recording and monitoring scenarios. It includes two combi XLR/¼” TRS input jacks, which can handle both microphone and instrument-level signals. However, the SSL 2+ adds a second headphone output and two pairs of RCA outputs, allowing for more flexible monitoring and routing options. Additionally, the SSL 2+ features MIDI I/O, which is absent in the SSL 2, making it a better choice for users who need to connect external MIDI gear.
On the other hand, the SSL 2 maintains a more straightforward design with its two combi XLR/¼” TRS inputs and a single headphone output. It also features two balanced monitor outputs, which are sufficient for most basic studio setups. Both interfaces share the renowned SSL preamps, Legacy 4K analog enhancement mode, and high-quality AD/DA conversion, ensuring pristine audio quality and professional-grade performance.
In terms of portability and ease of use, both the SSL 2 and SSL 2+ are compact and powered via USB-C, making them ideal for mobile recording setups. However, the SSL 2+’s additional features cater to users who require more connectivity options and flexibility in their recording and production workflows.
In summary, while both the SSL 2 and SSL 2+ provide exceptional audio quality and robust build quality, the SSL 2+ stands out with its additional MIDI I/O, extra headphone output, and more comprehensive output options. The SSL 2 remains a solid choice for those who need a simpler, yet equally powerful, audio interface solution.
User Rating Based on Analysis of Reviews |
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Pros: |
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High-quality SSL preamps for professional-grade audio recording
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USB-C connectivity for fast and reliable data transfer
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Comprehensive software bundle included
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Rugged and compact design for portability
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Low-latency monitoring with direct monitoring feature
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High-quality audio performance with SSL preamps.
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Solid build quality and professional design.
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Easy-to-use interface suitable for beginners and professionals.
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Dedicated 4K button to add SSL analog color to recordings.
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USB-C connectivity ensures fast and reliable data transfer.
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Cons: |
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Limited to two input channels, which may not suffice for larger setups
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Higher price point compared to other entry-level interfaces
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No dedicated MIDI output
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Lacks onboard DSP for effects processing
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Requires external power supply for optimal performance
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Limited to 2 inputs and 2 outputs, which may not be sufficient for more complex setups.
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No MIDI I/O, which can be a drawback for users needing MIDI connectivity.
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Relatively higher price point compared to some entry-level interfaces.
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Key Specs |
Channels of I/O |
Analog: 2 Inputs / 4 Outputs at 192 kHz |
Analog: 2 Inputs / 2 Outputs at 192 kHz |
Maximum Sampling Rate |
192 kHz / 24-Bit |
192 kHz / 24-Bit |
Number of Microphone Inputs |
2 Preamps |
2 Preamps |
Analog Audio I/O |
2x Combo XLR-1/4" TRS Balanced/Unbalanced Mic/Line/Hi-Z Input 2x 1/4" TRS Balanced Monitor Output 4x RCA TS Unbalanced Line Output 2x 1/4" TRS Unbalanced Headphone Output |
2x Combo XLR-1/4" TRS Balanced/Unbalanced Mic/Line/Hi-Z Input 2x 1/4" TRS Balanced Monitor Output 1x 1/4" TRS Unbalanced Headphone Output |
Host Connection |
1x USB-C |
1x USB-C |
OS Compatibility |
macOS 10.11 macOS 10.12 macOS 10.13 macOS 10.14 macOS 10.15 Windows 8.1 Windows 10 |
macOS 10.11 macOS 10.12 macOS 10.13 macOS 10.14 macOS 10.15 Windows 8.1 Windows 10 |
Power Requirements |
USB Bus Power |
USB Bus Power |
The Solid State Logic SSL 2+ USB-C Audio/MIDI Interface and the Solid State Logic SSL 2 USB-C Audio Interface share many core specifications but also feature distinct differences that cater to varying user needs. Both interfaces offer a maximum sampling rate of 192 kHz at 24-bit resolution and come equipped with two microphone preamps, ensuring high-quality audio capture.
In terms of analog audio input and output, the SSL 2+ provides a broader array of options. The SSL 2+ offers 2x combo XLR-1/4" TRS balanced/unbalanced mic/line/Hi-Z inputs, 2x 1/4" TRS balanced monitor outputs, 4x RCA TS unbalanced line outputs, and 2x 1/4" TRS unbalanced headphone outputs. In contrast, the SSL 2 provides the same number of inputs but only 2x 1/4" TRS balanced monitor outputs and 1x 1/4" TRS unbalanced headphone output, without the additional RCA line outputs available on the SSL 2+.
Both interfaces utilize a USB-C connection for host compatibility and support a range of operating systems, including macOS versions from 10.11 to 10.15 and Windows 8.1 and Windows 10. They are both powered via USB bus power, eliminating the need for external power supplies and enhancing portability.
Overall, while both interfaces offer high-quality audio performance, the SSL 2+ stands out with its additional output options, making it a more versatile choice for users who require more comprehensive connectivity. The SSL 2, on the other hand, offers a more straightforward setup with fewer outputs, which may be sufficient for users with simpler audio interface needs.
General |
Channels of I/O |
Analog: 2 Inputs / 4 Outputs at 192 kHz |
Analog: 2 Inputs / 2 Outputs at 192 kHz |
Maximum Sampling Rate |
192 kHz / 24-Bit |
192 kHz / 24-Bit |
Number of Microphone Inputs |
2 Preamps |
2 Preamps |
Input Level Adjustment |
2x Knob |
2x Knob |
Expansion Slots |
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The Solid State Logic SSL 2+ USB-C Audio/MIDI Interface and the Solid State Logic SSL 2 USB-C Audio Interface share many similarities, but also have key differences in their specifications that cater to different user needs.
Both the SSL 2+ and SSL 2 feature the same high-quality maximum sampling rate of 192 kHz / 24-bit, ensuring superior audio fidelity. They also both come equipped with 2 microphone preamps and provide input level adjustment via two knobs, making them equally adept at handling microphone inputs and level control.
Where they differ significantly is in their channels of I/O. The SSL 2+ offers more versatility with 2 analog inputs and 4 analog outputs, compared to the SSL 2, which provides 2 analog inputs and 2 analog outputs. This difference makes the SSL 2+ more suitable for users who require additional output options for monitoring or routing audio to multiple destinations.
Additionally, the SSL 2+ includes MIDI capabilities, allowing for the connection and control of MIDI devices, which is absent in the SSL 2. This makes the SSL 2+ a more comprehensive solution for musicians and producers who work with MIDI instruments and controllers.
Neither interface includes expansion slots, so users looking for additional expansion capabilities would need to look elsewhere.
In summary, while both interfaces offer excellent audio quality and similar input features, the SSL 2+ provides additional output channels and MIDI connectivity, making it a more versatile choice for users with more complex audio and MIDI requirements. The SSL 2, on the other hand, remains a solid, straightforward option for those who need a high-quality, no-frills audio interface.
Signal Processing |
Pad |
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Gain/Trim Range |
Mic/Line/Hi-Z Inputs: Up to 62 dB |
Mic/Line/Hi-Z Inputs: Up to 62 dB |
High-Pass Filter |
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Solo/Mute |
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The Solid State Logic SSL 2+ USB-C Audio/MIDI Interface and the Solid State Logic SSL 2 USB-C Audio Interface share a number of similar specifications, making them closely related in terms of their core functionality and design. Both models do not feature a pad, which means they do not have an attenuation switch to reduce the input signal level. This specification is consistent across both devices, indicating that neither interface is equipped with this function.
When it comes to the Gain/Trim Range for Mic/Line/Hi-Z Inputs, both the SSL 2+ and the SSL 2 offer up to 62 dB of gain. This is a substantial amount of gain, suitable for a variety of microphones and instruments, providing ample headroom and flexibility for recording different audio sources. The range is identical in both interfaces, ensuring they both deliver the same level of performance in this regard.
Neither the SSL 2+ nor the SSL 2 includes a High-Pass Filter. This means that both interfaces lack the ability to filter out low-frequency noise directly at the input stage, which can be useful in reducing rumble or handling noise during recording. Users of either interface would need to apply high-pass filtering through their recording software or external hardware if needed.
Additionally, both the SSL 2+ and the SSL 2 do not feature Solo/Mute functionality. This absence means that users will not be able to isolate or silence individual input channels directly on the interface itself. Instead, such functions would have to be managed within the digital audio workstation (DAW) software.
In summary, the Solid State Logic SSL 2+ and SSL 2 USB-C Audio Interfaces are virtually identical in terms of the features compared here. Both lack a pad, provide up to 62 dB of gain, do not include a high-pass filter, and do not offer solo/mute capabilities.
Connectivity |
Analog Audio I/O |
2x Combo XLR-1/4" TRS Balanced/Unbalanced Mic/Line/Hi-Z Input 2x 1/4" TRS Balanced Monitor Output 4x RCA TS Unbalanced Line Output 2x 1/4" TRS Unbalanced Headphone Output |
2x Combo XLR-1/4" TRS Balanced/Unbalanced Mic/Line/Hi-Z Input 2x 1/4" TRS Balanced Monitor Output 1x 1/4" TRS Unbalanced Headphone Output |
Phantom Power |
48 V, Selectable On/Off (Selectable on Individual Inputs) |
48 V, Selectable On/Off (Selectable on Individual Inputs) |
Digital Audio I/O |
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Host Connection |
1x USB-C |
1x USB-C |
Host Connection Protocol |
USB 2.0 |
USB 2.0 |
USB (Non-Host) |
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Sync I/O |
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Network I/O |
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MIDI I/O |
1x DIN 5-Pin Input 1x DIN 5-Pin Output |
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The Solid State Logic SSL 2+ USB-C Audio/MIDI Interface and the Solid State Logic SSL 2 USB-C Audio Interface are both high-quality audio interfaces designed for professional and home studio use. However, they have some key differences in their specifications that cater to different user needs.
Starting with the analog audio I/O, both models feature 2x Combo XLR-1/4" TRS balanced/unbalanced mic/line/Hi-Z inputs, and 2x 1/4" TRS balanced monitor outputs. The SSL 2+ distinguishes itself by providing 4x RCA TS unbalanced line outputs and 2x 1/4" TRS unbalanced headphone outputs, while the SSL 2 offers only 1x 1/4" TRS unbalanced headphone output. This makes the SSL 2+ more versatile for users who require additional outputs for routing audio signals to multiple devices or for multi-headphone monitoring.
In terms of phantom power, both interfaces offer 48V selectable on/off phantom power, which is essential for powering condenser microphones. This feature is selectable on individual inputs for both models, providing flexibility in mixed recording setups.
Neither the SSL 2+ nor the SSL 2 include digital audio I/O, ensuring that the focus remains on high-quality analog audio performance. Both interfaces connect to the host computer via a single USB-C port, adhering to the USB 2.0 protocol, which ensures compatibility with a wide range of devices and operating systems.
One significant difference is the inclusion of MIDI I/O on the SSL 2+. The SSL 2+ features 1x DIN 5-pin MIDI input and 1x DIN 5-pin MIDI output, enabling users to connect and interface with MIDI-compatible devices such as keyboards, controllers, and synthesizers. The SSL 2, on the other hand, does not offer any MIDI I/O, making it less suitable for users who require MIDI connectivity.
In summary, while both the SSL 2+ and SSL 2 share several core features and high-quality audio performance, the SSL 2+ offers additional analog audio outputs, dual headphone outputs, and MIDI I/O, making it a more versatile option for users with more complex routing and connectivity needs. The SSL 2, with its simpler set of features, is ideal for users who need a straightforward, high-quality audio interface without the additional connectivity options.
Performance |
Frequency Response |
Line, Hi-Z Inputs: 20 Hz to 20 kHz ±0.05 dB Mic Inputs: 20 Hz to 20 kHz ±0.1 dB Line, Headphone, Monitor Outputs: 20 Hz to 20 kHz ±0.05 dB |
Line, Hi-Z Inputs: 20 Hz to 20 kHz ±0.05 dB Mic Inputs: 20 Hz to 20 kHz ±0.1 dB |
Maximum Input Level |
Mic Inputs: +5.5 dBu Line Inputs: +24 dBu Hi-Z Inputs: +15 dBu |
Mic Inputs: +5.5 dBu Line Inputs: +24 dBu Hi-Z Inputs: +15 dBu |
Maximum Output Level |
1/4" Monitor Outputs: +12.5 dBu RCA Line Outputs: +6.5 dBu Headphone Outputs: +10 dBu |
Monitor Outputs: +12.5 dBu Headphone Outputs: +10 dBu |
Impedance |
Mic Inputs: 1.2 Kilohms Line Inputs: 10 Kilohms Hi-Z Inputs: 1 Megohm Monitor Outputs: 1 Ohm RCA Line Outputs: < 1 Ohm Headphone Outputs: 10 Ohms |
Mic Inputs: 1.2 Kilohms Line Inputs: 10 Kilohms Hi-Z Inputs: 1 Megohm Monitor Outputs: 1 Ohm Headphone Outputs: 10 Ohms |
Dynamic Range |
Mic/Line/Hi-Z Inputs: 110.5 dB (A-Weighted) Monitor Outputs: 112 dB (A-Weighted) RCA Line Outputs: 110 dB Headphone Outputs: 111 dB (A-Weighted) |
Mic/Line/Hi-Z Inputs: 110.5 dB (A-Weighted) Monitor Outputs: 112 dB (A-Weighted) Headphone Outputs: 111 dB (A-Weighted) |
THD+N |
Mic/Line/Hi-Z Inputs: < 0.005% (at -1 dBFS) Monitor Outputs: < 0.002% (at -1 dBFS) RCA Line Outputs: < 0.0025% (at -1 dBFS) Headphone Outputs: < 0.002% (at -1 dBFS) |
Mic/Line/Hi-Z Inputs: < 0.005% (at -1 dBFS) Monitor Outputs: < 0.002% (at -1 dBFS) |
EIN |
Mic Inputs: -130.5 dBu A-Weighted (150-Ohm Source) |
Mic Inputs: -130.5 dBu A-Weighted (150-Ohm Source) |
The Solid State Logic SSL 2+ USB-C Audio/MIDI Interface and the Solid State Logic SSL 2 USB-C Audio Interface share several core features but also have distinct differences that cater to varying user needs.
Both interfaces have an identical frequency response of 20 Hz to 20 kHz, with a minor variation in the precision of the Mic Inputs, which is ±0.1 dB for both. Their maximum input levels are also the same: +5.5 dBu for Mic Inputs, +24 dBu for Line Inputs, and +15 dBu for Hi-Z Inputs. The impedance levels for Mic Inputs (1.2 Kilohms), Line Inputs (10 Kilohms), Hi-Z Inputs (1 Megohm), Monitor Outputs (1 Ohm), and Headphone Outputs (10 Ohms) are also consistent across both models.
For output levels, the SSL 2+ has additional RCA Line Outputs that provide a maximum of +6.5 dBu, whereas the SSL 2 does not include these RCA Line Outputs. Both models offer a maximum output level of +12.5 dBu for 1/4" Monitor Outputs and +10 dBu for Headphone Outputs.
In terms of dynamic range, both the SSL 2+ and SSL 2 have the same specifications: 110.5 dB (A-Weighted) for Mic/Line/Hi-Z Inputs, 112 dB (A-Weighted) for Monitor Outputs, and 111 dB (A-Weighted) for Headphone Outputs. The SSL 2+ also specifies 110 dB for its RCA Line Outputs.
The Total Harmonic Distortion plus Noise (THD+N) values are slightly different between the models. For Mic/Line/Hi-Z Inputs, both have less than 0.005% at -1 dBFS. For Monitor Outputs, the SSL 2+ has less than 0.002% at -1 dBFS, while the SSL 2 does not provide a THD+N value for RCA Line Outputs, as it doesn't have them. Both models have less than 0.002% THD+N for Headphone Outputs.
Lastly, the Equivalent Input Noise (EIN) for Mic Inputs is the same for both models at -130.5 dBu A-Weighted with a 150-Ohm source.
In summary, while both the SSL 2+ and SSL 2 share many core specifications, the SSL 2+ includes additional features such as RCA Line Outputs and MIDI I/O, which the SSL 2 lacks. This makes the SSL 2+ a more versatile option for users who need these extra connectivity options.
Digital Audio |
Sample Rates |
Up to 192 kHz |
Up to 192 kHz |
Sample Rate Conversion |
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Bit Depths |
Up to 24-Bit |
Up to 24-Bit |
Latency |
< 1 ms at 48 kHz (Input to Output) |
< 1 ms at 48 kHz (Input to Output) |
Sync Sources |
Internal |
Internal |
The Solid State Logic SSL 2+ USB-C Audio/MIDI Interface and the Solid State Logic SSL 2 USB-C Audio Interface share a number of core features, reflecting their common heritage and design principles. Both devices support sample rates of up to 192 kHz, ensuring high-resolution audio capture and playback. Neither unit includes sample rate conversion, which means they rely solely on the set sample rates for their operations.
In terms of bit depth, both interfaces are capable of recording and processing audio at up to 24-bit, which provides a wide dynamic range and precise detail. Latency is also a significant consideration for audio interfaces, and both the SSL 2+ and SSL 2 boast impressively low latencies of less than 1 ms at 48 kHz from input to output, which is crucial for real-time monitoring and recording.
Both interfaces utilize internal sync sources, meaning they are designed to operate independently without requiring external clock sources. This simplifies setup and ensures stable operation in a variety of recording environments.
In summary, the Solid State Logic SSL 2+ and SSL 2 USB-C Audio Interfaces are virtually identical in terms of sample rates, bit depths, latency, and sync sources, ensuring that users of either model benefit from high-quality, reliable audio performance.
Audio Storage & Playback |
Memory Card Slot |
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The Solid State Logic SSL 2+ USB-C Audio/MIDI Interface and the Solid State Logic SSL 2 USB-C Audio Interface share several similarities, including their lack of a memory card slot. Both devices are designed to provide high-quality audio recording and playback, leveraging Solid State Logic's renowned expertise in audio technology.
The SSL 2+ and SSL 2 both feature USB-C connectivity, ensuring fast and efficient data transfer between the interface and a computer. This modern connection type supports a wide range of devices, enhancing their versatility in various studio settings. The primary difference between the two models lies in the additional MIDI capabilities and expanded I/O options of the SSL 2+.
The SSL 2+ includes MIDI input and output ports, which allow users to connect external MIDI devices such as keyboards, controllers, and synthesizers. This feature is particularly beneficial for musicians and producers who rely heavily on MIDI equipment in their workflow. In contrast, the SSL 2 lacks these MIDI connectivity options, focusing solely on audio interfacing.
In summary, while both the SSL 2+ and SSL 2 offer high-quality audio interfacing with USB-C connectivity and do not include memory card slots, the SSL 2+ provides additional MIDI capabilities and more extensive I/O options, making it a more versatile choice for users who require integration with MIDI devices.
Compatibility |
OS Compatibility |
macOS 10.11 macOS 10.12 macOS 10.13 macOS 10.14 macOS 10.15 Windows 8.1 Windows 10 |
macOS 10.11 macOS 10.12 macOS 10.13 macOS 10.14 macOS 10.15 Windows 8.1 Windows 10 |
Mobile Device Compatibility |
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Required Hardware |
Available USB 2.0 Port USB Cable (Included) |
Available USB 2.0 Port USB Cable (Included) |
Internet Connection |
Required for Registration, Software/Driver Download |
Required for Registration, Software/Driver Download |
The Solid State Logic SSL 2+ USB-C Audio/MIDI Interface and the Solid State Logic SSL 2 USB-C Audio Interface share identical specifications in terms of OS compatibility, mobile device compatibility, required hardware, and internet connection requirements. Both interfaces are compatible with macOS versions 10.11 to 10.15 and Windows versions 8.1 and 10. Neither interface supports mobile device compatibility. Each requires an available USB 2.0 port, and both come with a USB cable included. An internet connection is necessary for registration and for downloading software or drivers for both models.
Power |
Power Requirements |
USB Bus Power |
USB Bus Power |
The Solid State Logic SSL 2+ USB-C Audio/MIDI Interface and the Solid State Logic SSL 2 USB-C Audio Interface share the same power requirements, both being powered via USB Bus Power. This means that neither device requires an external power supply, making them highly portable and convenient for use with laptops and other USB-equipped devices. The reliance on USB Bus Power ensures that both interfaces are straightforward to set up and use, drawing the necessary power directly from the connected computer or host device.
Both interfaces are designed for high-quality audio recording and production, offering SSL's renowned sound quality and robust build. The USB-C connectivity ensures fast data transfer rates and low latency, enhancing the user experience in both studio and mobile recording environments. Whether you choose the SSL 2+ or the SSL 2, you can expect reliable performance powered simply through a USB connection.
Physical |
Anti-Theft Features |
Kensington Security Slot |
Kensington Security Slot |
Operating Temperature |
33 to 104°F / 1 to 40°C |
33 to 104°F / 1 to 40°C |
Storage Temperature |
-4 to 122°F / -20 to 50°C |
-4 to 122°F / -20 to 50°C |
Dimensions |
9.2 x 6.2 x 2.7" / 23.4 x 15.7 x 6.9 cm |
9.2 x 6.2 x 2.7" / 23.4 x 15.7 x 6.9 cm |
Weight |
2.0 lb / 0.9 kg |
1.9 lb / 880.0 g |
The Solid State Logic SSL 2+ USB-C Audio/MIDI Interface and the Solid State Logic SSL 2 USB-C Audio Interface share several similarities in their specifications, but there are a few key differences to note.
Both the SSL 2+ and SSL 2 models feature anti-theft protection in the form of a Kensington Security Slot, ensuring that users can secure their devices against theft. Additionally, both interfaces operate within the same temperature range, with an operating temperature of 33 to 104°F (1 to 40°C) and a storage temperature range of -4 to 122°F (-20 to 50°C). This makes either model suitable for a variety of environments and conditions.
In terms of dimensions, both the SSL 2+ and SSL 2 are identical, measuring 9.2 x 6.2 x 2.7 inches (23.4 x 15.7 x 6.9 cm). This consistency in size means that either device will occupy the same amount of physical space, which is convenient for users who have limited space or prefer a compact setup.
However, a notable difference lies in the weight of the two models. The SSL 2+ weighs in at 2.0 lb (0.9 kg), whereas the SSL 2 is slightly lighter at 1.9 lb (880.0 g). Although the difference is minor, it may be a consideration for users who prioritize portability and ease of transport.
In summary, while both the Solid State Logic SSL 2+ and SSL 2 USB-C Audio Interfaces share many features, including anti-theft protection, operating and storage temperature ranges, and dimensions, they do differ slightly in weight. The SSL 2+ is marginally heavier than the SSL 2, which could be a factor for users concerned with portability.
Packaging Info |
Package Weight |
2.61 lb |
2.535 lb |
Box Dimensions (LxWxH) |
10.9 x 7.9 x 4.1" |
10.5 x 7.8 x 4.2" |
The Solid State Logic SSL 2+ USB-C Audio/MIDI Interface and the Solid State Logic SSL 2 USB-C Audio Interface are both high-quality audio interfaces designed for professional and home studio use. However, there are slight differences in their physical specifications.
The SSL 2+ package weight is 2.61 lb, while the SSL 2 package weight is slightly lighter at 2.535 lb. This minor difference in weight may not significantly impact portability, but it is worth noting for those who prioritize even the smallest weight differences in their gear.
In terms of box dimensions, the SSL 2+ measures 10.9 x 7.9 x 4.1 inches. On the other hand, the SSL 2's box dimensions are marginally smaller at 10.5 x 7.8 x 4.2 inches. This indicates that while the SSL 2+ is slightly larger in length and width, the SSL 2 compensates with a slightly greater height.
Overall, while both interfaces are similar in weight and size, the SSL 2+ is marginally heavier and has a slightly larger footprint in length and width, whereas the SSL 2 is a bit taller. These differences in physical specifications should be considered based on the specific needs and preferences of the user.