This product has been discontinued.
Computer system requirements:
Below are the minimum computer-system requirements for UC Surface, QMix-UC, and Studio One®.
Mac
- macOS® 10.13, 10.14, 10.15 (64-bit only)
- Intel® Core™ 2 Duo processor (Intel Core i3 or faster recommended)
- Apple M1 Mac (Apple Silicon Series) not supported
- 4 GB RAM (8 GB or more recommended)
Windows
- Windows 10 x64
- Intel Core 2 Duo (Intel Core i3 or faster recommended)
- 4 GB RAM (8 GB or more recommended)
Intel Mac and Windows Systems
- FireWire S800 (IEEE 1394b) port or Thunderbolt port with FireWire S800 adapter
- Internet connection
- Internal or external 7200 RPM storage drive highly recommended
- 30 GB hard disk space
- Monitor with 1366x768 resolution
iOS
- iOS 10 or later
- iPad Pro, iPad Air 2, iPad Air, iPad mini 4, iPad mini with Retina display, iPad (4th generation)
Android
- Android™ 6.0 (Marshmallow) or later
- Android smartphone (QMix-UC)
- Android tablet (8-inch) with 1024x768 resolution (UC Surface)
Note: The minimum system requirements may differ for DAWs other than Studio One. Please check the requirements for your DAW of choice with its manufacturer.
Note that the speed of your processor, amount of RAM and size and speed of your hard drive will greatly affect the overall performance of your recording system. Also, a more powerful system (faster processor with more RAM) will allow for lower latency (signal delay) than you might experience while monitoring audio signals.

VST is a registered trademark of Steinberg Media Technologies GmbH
ASIO is a trademark and software of Steinberg Media Technologies GmbH
Technical Specifications
Microphone Preamps (XLR Balanced)
|
|
Type |
XLR Female, Balanced |
Frequency Response to Direct Output |
20 Hz to 40 kHz ±0.5 dBu |
Frequency Response to Main Output |
20 Hz to 20 kHz ±0.5 dBu |
Input Impedance (Balanced) |
1 kΩ |
THD to Direct Output |
< 0.007%, +4 dBu, 20-20 kHz, unity gain, unwtd |
THD to Main Output |
<0.005%, +4 dBu, 20-20 kHz, unity gain, unwtd |
EIN to Direct Output |
+125 dB unwtd, +130 dB A-wtd |
S/N Ratio to Direct Output |
105 dB |
S/N Ratio to Main Output |
94 dB |
Common Mode Rejection Ratio |
65 dB |
Gain Control Range |
-15 dB to +65 dB (± 1 dB) |
Maximum Input Level (unity gain) |
+22 dBu |
Phantom Power |
+48 VDC |
Line Inputs
|
|
Type |
¼" TRS Female, balanced mono |
Frequency Response to Direct Outputs |
10-40 kHz, 0 / -0.5 dBu |
Frequency Response to Main Outputs |
20-20 kHz, ±0.5 dBu |
Input Impedance |
10 kΩ |
THD to Direct Output |
<0.007%, +4 dBu, 20-20 kHz, unity gain, unwtd |
THD to Main Output |
<0.005%, +4 dBu, 20-20 kHz, unity gain, unwtd |
S/N Ratio to Direct Output |
105 dB |
S/N Ratio to Main Output |
94 dB |
Gain Control Range (±1 dB) |
-20 dB to +20 dB |
Maximum Input level (unity gain) |
+22 dBu |
Tape Inputs
|
|
Type |
RCA Female, unbalanced (stereo pair) |
Maximum Input Level |
+22 dBu |
Auxiliary Inputs
|
|
Type |
¼" TRS Female, balanced (2 stereo pairs) |
Maximum Input Level |
+22 dBu |
Main Outputs
|
|
Type |
Male, balanced (stereo pair); ¼" TRS Female, balanced (stereo pair); XLR Male, balanced (mono) |
Rated Output Level |
+24 dBu |
Output Impedance |
100Ω |
Aux Outputs
|
|
Type |
¼" TRS Female, balanced (mono) |
Rated Output Level |
+18 dBu |
Output Impedance |
100Ω |
Subgroup Outputs
|
|
Type |
¼" TRS Female, balanced (mono) |
Rated Output Level |
+18 dBu |
Output Impedance |
100Ω |
Tape Outputs
|
|
Type |
RCA Female, unbalanced (stereo pair) |
Rated Output Level |
+18 dBu |
Output Impedance |
100Ω |
Control Room Outputs
|
|
Type |
¼" TRS Female, balanced (stereo pair) |
Rated Output Level |
+18 dBu |
Output Impedance |
100Ω |
System Crosstalk
|
|
Input to Output (Ref = +4 dBu, 20 Hz-20 kHz, unwtd) |
-90 dBu |
Adjacent Channels (Ref = +4 dBu, 20 Hz-20 kHz, unwtd) |
-87 dBu |
Noise Gate / Expander
|
|
Threshold Range |
-84 dB to 0 dB |
Attack Time |
0.02s to 500 ms / 0.5 ms |
Release Time |
0.05s to 2s |
Expander Attenuation Range |
2:1 |
Gate Attenuation Range |
-84 dB to 0 dB / ∞ |
Key Listen Filter |
2nd-order resonant bandpass; Q=0.7; OFF, 40 Hz-16 kHz |
Limiter
|
|
Threshold |
-56 dB to 0 dB / -28 dBFS |
Ratio |
∞:1 |
Attack |
20 ms |
Hold |
10 ms |
Release |
20 ms |
Compressor
|
|
Threshold Range |
-56 dB to 0 dB |
Ratio |
1:1 to 14:1 |
Attack Time |
0.2 ms to 150 ms |
Release Time |
40 ms to 1000 ms |
Auto Attack and Release |
Attack = 10 ms, Release = 150 ms |
Curve Types |
hard and soft knee |
Parametric EQ
|
|
Type |
2nd-order shelving filter (Q = 0.55) |
Low (Lowpass or Bandpass) |
36 to 465 Hz, ±15 dB |
Low Mid |
90 Hz to 1.2 kHz, ±15 dB |
High Mid |
380 Hz to 5 kHz, ±15 dB |
High (Highpass or Bandpass) |
1.4 kHz to 18 kHz, ±15 dB |
Q |
Low Q= 0.55, Hi Q=2.0* |
Graphic EQ
|
|
31-Band 1/3rd Octave Controls |
Curve-fitting algorithm |
Gain/Attenuation |
±15 dB |
Digital Audio
|
|
ADC Dynamic Range (A-wtd, 48 kHz) |
118 dB |
DAC Dynamic Range (A-wtd, 48 kHz) |
118 dB |
FireWire |
s800, 800 Mb/s |
Internal Processing |
32-bit, floating point |
Sampling Rate |
44.1, 48, 88.2, 96 kHz |
A/D/A Bit Depth |
24 |
Reference Level for 0 dBFS |
+18 dBu |
Clock
|
|
Jitter |
<20 ps RMS (20 Hz - 20 kHz) |
Jitter Attenuation |
>60 dB (1 ns in ≈ 1 ps out) |
Power/Environmental
|
|
Connector |
IEC |
Input-Voltage Range |
100 to 230V, 50-60 Hz |
Power Requirements |
200W |
Temperature Range |
0˚ to 40˚ Celsius / 32˚ to 104˚ Fahrenheit |
Physical
|
|
Length |
22.35" (58.6 cm) |
Width (chassis only) |
17.22" (43.74 cm) |
Maximum Height |
6.9" (17.53 cm) |
Weight |
23 lbs. (10.43 kg) |
*Fully variable through VSL-AI, UC Surface, and SL Remote-AI.
Please see complete mechanical drawings when building a custom rack, desk, or case.
As a commitment to constant improvement, PreSonus® Audio Electronics, Inc., reserves the right to change any specification stated herein, at any time, without notification.