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Wharfedale SL Series 8-Input Audio Mixer w/ USB


The SL 424 is a compact studio/live mixing console with built-in full duplex USB interfacing.

Designed to cater for a wide range of mid format mixing duties, the SL 424 includes many features suited to both live sound and home studio applications.

The studio quality class-compliant 2-input 2-output 16-bit/48kHz USB interface is great for live and home recording.

Studio grade microphone preamps are used throughout the range and have balanced XLR inputs, with all channels also offering balanced/unbalanced TRS line level connectivity.

In addition all of the mono channels on larger models have a TRS insert point. An ultra musical 3-band EQ is available on all channels, with dedicated FX send and auxiliaries.


  • 8 Inputs
  • 4 Outputs
  • Full Duplex 2 In/2 Out 16-Bit 48kHz USB Interface
  • Dedicated USB Recording Bus (Excluding SL 424)
  • Switchable Line/USB Return Channels (Excluding SL 424)
  • Studio Grade Phantom Powered Microphone Pre-Amps
  • Headphone output
  • Ultra Musical 3-Band EQ with High Pass Filters
  • Built-In Digital FX with Dedicated Send
  • 2 Auxiliary Sends (1 Send on SL 424)
  • Dedicated Stereo Return with Level Control
  • Pan and Balance Controls
  • Master Outputs with XLR and TRS Connectors
  • PFL for All Channels
  • Control Room and Headphone Outputs



You don’t need any special ‘Wharfedale Pro’ driver software to make an SL mixer work perfectly with a Windows, Mac or Linux computer. 

Simply connect the SL mixer to the computer with the USB cable and, because the mixer is a ‘Class Compliant’ USB audio device, it will simply use the internal driver software of your host computer. 

With the mixer connected and turned on, just select the USB audio driver in your system settings/device manager and suddenly you’ve got a digital audio connection to and from your computer.

2-channels into the computer and 2-channels out.  All over the supplied USB cable. 



An ultra musical 3-band EQ is available on all channels, with dedicated FX send and auxiliaries.



With a built-in USB audio interface, the SL series enables a stereo in/out which can be used for playback of audio files from your PC or Mac, and can also record the master output of your mixing desk.

16-bit / 48 kHz recording ensures 2-channel CD quality audio, whether working in a live or studio environment.



SL824USB and SL1224USB feature the FX logic DSP processor which delivers a total of 16 effects.

These include a variety of delays, reverbs, chorus, and rotary speaker algorithms, achieving a professional touch on your mix and lending itself to more creative sound engineering styles.

By name, the 16 FX are……


(1)Hall1 (2)Hall2 (3)Room1 (4)Room2 (5)Room3(6)Plate reverb1 (7)Plate reverb2 (8)Plate reverb3 (9)Chorus (10)Flange (11)Delay1 (12)Delay2 (13)Chorus/Room1 (14)Chorus/Room2 (15)Bypass (16)Rotary speaker.

All very useable, in the real-world!



SL series do not use a ‘wall wart’ external power supply.  The AC cable is included and the internal transformer ensures smooth power delivery to the internal electronics.



Model Name ------------------------------------------------------------ SL424USB

Channels --------------------------------------------------------------- 8

Inputs ------------------------------------------------------------------ 4 x XLR, 8 x 6.3 mm jack

Outputs ---------------------------------------------------------------- 2 x XLR, 2 x 6.3 mm jack

Headphone Output ---------------------------------------------------- 6.3 mm jack

Auxiliary sends -------------------------------------------------------- 1

FX ----------------------------------------------------------------------- Send / Return

EQ ---------------------------------------------------------------------- 3 Band

Phantom Power -------------------------------------------------------- Yes

USB --------------------------------------------------------------------- 16 bit / 48 kHz

Signal To Noise Ratio -------------------------------------------------- 127 dBu ±5 dBu Mic Pre Equivalent Input Noise

Frequency Response -------------------------------------------------- 20 Hz – 20 kHz ±2 dB

Display ----------------------------------------------------------------- 4 Segment Level LED with power and Phantom Power indication

Dimensions ------------------------------------------------------------ (H x W x D) 76 x 248 x 262 mm

Weight (Includes Rack Mount Kit) ------------------------------------ 2.7 kg / 5.95 lbs

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