SL Series Mixing Consoles

SL824USB & SL1224USB Studio/Live Mixer

OPERATING MANUAL AND USER GUIDE

www.wharfedalepro.com

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OPERATING MANUAL AND USER GUIDETABLE OF CONTENTS
Important Warnings & Safety Information...........................................................................2
Introduction.........................................................................................................................4
About The SL Series..........................................................................................................4
Features.............................................................................................................................4
Mono Channels................................................................................................................. 5
Stereo Channels.................................................................................................................6
FX and Aux Section............................................................................................................7
Front Panel Inputs and Outputs.........................................................................................7
Master Section...................................................................................................................8
Rear Panel Inputs and Outputs..........................................................................................8
USB Interface.....................................................................................................................9
Wiring Diagram.................................................................................................................10
Dimensional Drawings......................................................................................................11
Block Diagram..................................................................................................................12
Specifications...................................................................................................................13
Warranty...........................................................................................................................141

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SL824USB & SL1224USB Studio/Live Mixer

IMPORTANT WARNINGS & SAFETY INSTRUCTIONS
1.

Read these instructions

2.

Follow all instructions

3.

Keep these instructions

4.

Heed all warnings

5.

Do not use this apparatus near water

6.

Clean only with dry cloth.

7.

Do not block any ventilation openings. Install in accordance with the manufacturer’s
instructions.

8.

Do not install near any heat sources such as radiators, heat registers, stoves, or otherapparatus (including amplifiers) that produce heat.

9.

Do not defeat the safety purpose of the polarised or grounding plug. A polarised plug has two
blades with one wider than the other. A grounding plug has two blades and a third grounding
prong. The wide blade or the third prong is provided for your safety. If the provided plug does
not fit into your outlet, consult an electrician for replacement of the obsolete outlet.

10. Protect the power cord from being walked on or pinched particularly at the plugs, convenience
receptacles, and at the point where they exit from the apparatus.
11. Only use attachments/accessories specified by the manufacturer.
12. Use only with a cart, stand, tripod, bracket, or table specified by the manufacturer, or sold withthe apparatus. When a cart or rack is used, use caution when moving the cart and apparatus
combination to avoid injury from tip-over.

13. Unplug the apparatus during lightning storms or when unused for long periods of time.
14. Refer all servicing to qualified personnel. Servicing is required when the apparatus has beendamaged in any way including but not limited to power supply cord or plug damage, liquid
ingress, foreign objects in the chassis, exposure to rain/moisture or impact damage. In addition
the unit must be serviced when you experience any abnormal operation.
15. CAUTION: These servicing instructions are for use by qualified service personnel only. To
reduce the risk of electric shock, do not attempt to perform any servicing other than that
contained in the operating instructions unless you are qualified to do so. In addition opening thecasing will result in your warranty becoming null and void.
16. Do not install this apparatus in a confined space such as a book case or similar unit. Goodventilation should be maintained around the apparatus and any vents, air-inlets or fans should
not be obstructed by objects such as paper, table-cloths, curtains etc.
17. WARNING: To reduce the risk of fire or electric shock, do not expose the apparatus to rain or
moisture. The apparatus should not be exposed to dripping or splashing and objects filled withliquids, such as vases, should not be placed on the apparatus.
18. WARNING: The mains plug/appliance coupler is used as a disconnect device, the disconnect
device shall remain readily operable.

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OPERATING MANUAL AND USER GUIDEATTENTION: RISQUE DE CHOC ELECTRIQUE-NE PAS OUVRIR

19. - This lightning flash with arrowhead symbol within an equilateral triangle is intended to alert theuser to the presence of non-insulated “dangerous voltage” within the product’s enclosure that
may be of sufficient magnitude to constitute a risk of electric shock.
- Warning: To reduce the risk of electric shock, do not remove the cover (or back) as there areno user-serviceable parts inside. Refer servicing to qualified personnel.
- The exclamation point within an equilateral triangle is intended to alert the user to thepresence of important operating and maintenance instructions in the literature accompanying
the appliance.
20.

(Protective earthing terminal) The apparatus should be connected to a mains socket outlet
with a protective earthing connection.

21.

Correct Disposal of this product. This marking indicates that this product should not be
disposed with other household wastes throughout the EU. To prevent possible harm to theenvironment or human health from uncontrolled waste disposal, recycle it responsibly topromote the sustainable reuse of material resources. To return your used device, please use
local return and collection systems or contact the retailer where the product was purchased.
They can take this product for safe environmentally friendly recycling.

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SL824USB & SL1224USB Studio/Live Mixer

INTRODUCTION
Congratulations on the purchase of your SL Series mixer. SL Series mixers are the result of many
years of experience in the use, design and manufacture of professional audio products. We takegreat pride in engineering and building every Wharfedale Pro product and wish to thank you for
entrusting us with your sound.
From the time Gilbert Briggs built his first loudspeaker in 1932, to the present day, Wharfedale havemaintained the same standard of quality in components, workmanship and performance.
Please take the time to read this manual completely in order to ensure that you get the most fromyour SL Series mixer.

ABOUT THE SL SERIES
Designed to cater for a wide range of mid format mixing duties, SL Series mixers include many
features suited to live sound and home studio applications.
All SL models feature a high quality class-compliant 2-input, 2-output 16-bit/48KHz USB interface
matched to a flexible record bus and dedicated return channel, creating a system that is great forlive and home recording.
An ultra musical 3-band EQ is available on all channels, with an additional high pass filter on themono channels. A built in FX processor with 16 presets gives you unlimited creative potential and is
supplemented by a dedicated FX send and 2 auxiliaries.

FEATURES♦

8 mono channels on the SL824USB and 12 mono channels on the SL1224USB♦

2 Stereo channels (1 switchable stereo line/USB return channel)♦

2in/2out full duplex 16-bit 48KHz USB interface♦

Dedicated USB recording bus♦

Studio grade phantom powered microphone pre-amps♦

Ultra musical 3 band EQ with high pass filters♦

Built-in digital FX with dedicated send♦

2 auxiliary sends♦

Stereo Aux return with level control♦

Pan and balance controls♦

PFL for all channels♦

Control room and headphone outputs♦

Master outputs with XLR and TRS connectors

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OPERATING MANUAL AND USER GUIDEMONO CHANNELS
1.

Balanced XLR input for connecting microphones

2.

Balanced/Unbalanced TRS input for line level sources

3.

HPF with 80Hz cutoff point

4.

TRS insert point for processors or for use as a direct output

4

5.

Gain control for calibrating sources and applying correct gain structure

56.

High EQ centred at 12KHz

7.

Mid EQ centred at 1KHz

6

8.

Low EQ centred at 80Hz

79.

Pre-fader auxiliary send for monitor mixes or effects

8

10. Switchable pre/post-fader auxiliary send for monitor mixes or effects

9

11. Pre/Post switching for Aux 2

10

12. Sends to the internal FX engine

1

2
3

11
12
13
14
15
16
17
18
19

13. Used to spatially place the channel within the stereo field
14. (Pre Fade Listen) allows you to set the channel gain and monitor thechannel in isolation through the control room or headphone outputs
15. Indicates that PFL is engaged
16. Shows when clipping is occurring
17. Shows when signal is present
18. Sends the channel to the main mix bus
19. Sends the channel to the USB recording bus

20
20. Sets the amount of signal sent to the main or USB bus

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SL824USB & SL1224USB Studio/Live Mixer

STEREO CHANNELS
1.

1

Balanced/Unbalanced TRS input for the left channel or mono line levelsources22.

Switches between USB and line level source

3.

Balanced/Unbalanced TRS input for the right channel of stereo line

3
level sources

4

5

4.

Gain control for calibrating sources and applying correct gain structure

5.

High EQ centred at 12KHz

6.

Mid EQ centred at 1KHz

7.

Low EQ centred at 80Hz8.

Pre-fader auxiliary send for monitor mixes or effects

9.

Switchable pre/post-fader auxiliary send for monitor mixes or effects

6
7

8
9

10. Pre/Post switching for Aux 2

10
11. Sends to the internal FX engine

11

12. Used to spatially place the channel within the stereo field

12

13. (Pre Fade Listen) allows you to set the channel gain and monitor the
13
14
15
16

channel in isolation through the control room or headphone outputs
14. Indicates that PFL is engaged
15. Shows when clipping is occurring

17
16. Shows when signal is present
18

17. Sends the channel to the main mix bus

19

18. Sends the channel to the USB recording bus
19. Sets the amount of signal sent to the main or USB bus

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OPERATING MANUAL AND USER GUIDEFX AND AUX SECTION
1.
1

3

2

4

6

5

7

8
9

10

Sends the FX output to the Auxiliary bus 1 so that FX
can be heard in monitor mixes

2.

Sends the FX output to the Auxiliary bus 2 so that FX
can be heard in monitor mixes

3.

Selects the effect algorithm as listed below the control

4.

Shows when the FX bus is overloaded

5.

Shows when the FX bus is receiving signal

6.

Turns the FX processor on or off

7.

Sends the output of the FX processor to the main mix
bus

11

8.

Controls the overall level of the Aux 1 bus

9.

Controls the overall level of the Aux 2 bus

10. Controls the overall level of the FX bus
11. Controls the level of the Aux Return input

FRONT PANEL INPUTS AND OUTPUTS

1
1.

2

3

4

5

Used to connect the output of an external effect processor that is fed by an Aux bus. As it has
an independent level control it can be used as an additional line level utility input.

2.

Aux send 1 & 2 outputs the signal sent to each respective bus. These can be used to feed
processors or monitors.

3.

Used for control room monitoring, connect directly to your power amplifier or active speakers

4.

Connects to your computer for full duplex class-compliant recording and playback5.

For connecting headphones

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SL824USB & SL1224USB Studio/Live Mixer

MASTER SECTION
1

2

3

1.

Switches the +48v phantom power on or off

2.

Indicates +48v phantom power activity

3.

Indicates AC power supply

4.

Shows the level present at the master bus, when PFL
is engaged shows the level of the selected channels

4(left side of metering only)
5.

Controls the level of the control room and headphone
outputs

5

6

6.

Controls the master level of the USB recording bus

7.

Controls the master level of the main mix bus

7

REAR PANEL INPUTS AND OUTPUTS

1

2

3

4

5

1.

IEC receptacle for AC power supply

2.

Toggles the power on or off

3.

Balanced XLR main outputs

4.

Balanced/unbalanced TRS main outputs

5.

A utility output from the USB bus, enables the USB bus to feed an external recorder.

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OPERATING MANUAL AND USER GUIDEUSB INTERFACEThe USB connector enables computers with USB connectivity to interface directly with the SL
Series mixer for full duplex recording and playback. In recent years the introduction of USB
connectivity has ushered a new appreciation of the capabilities of computer audio, helping to fuseboth digital and analogue and open up endless possibilities for the recording musician.
The internal AD (Analogue to Digital) and DA (Digital to Analogue) converters are 16-bit/48KHz
enabling recording and playback above CD quality, ensuring that recordings that you make with an
SL Series Mixer have outstanding quality.
The SL Series are fully class compliant and requires no drivers when used with modern operating
systems. Mac OSX, Windows XP, Vista and 7 will require no additional driver software.
Windows XP Installation
Simply choose the device in the following location: Start/Settings/Control Panel/Sounds and Audio
Devices/Audio
Mac OSX Installation
Simply select as an input and output device using the "Audio MIDI Setup" page, you can find thiseasily using the spotlight function.

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SL824USB & SL1224USB Studio/Live Mixer

WIRING DIAGRAMWIRING DIAGRAM
SL824USB Mixer
Mixer Output

Microphone

Professional Amplifier

Loudspeaker B

Loudspeaker A

WIRING DIAGRAM
Amplifier Output
SL1224USB Mixer

Mixer Output

Microphone

Professional Amplifier

Loudspeaker B

Loudspeaker A

Amplifier Output
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OPERATING MANUAL AND USER GUIDEDIMENSIONAL DRAWINGS
50W

400.00369.00475.00400.0085.34

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SL824USB & SL1224USB Studio/Live Mixer

BLOCK DIAGRAMSL X24 BLOCK DIAGRAM

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OPERATING MANUAL AND USER GUIDESPECIFICATIONS
0dBu=0.775Vrms
Maximum Balanced Output

SL824USB
Main XLR Balanced Out +26.5dBu ±1dBu

Level (1%T.H.D. at 1KHz )Main ¼" Jack Balanced Out +26.5dBu ±1dBu

Maximum Unbalanced

Main XLR Unbalanced Out +21dBu ±1dBu

Output Level (1%T.H.D. atMain ¼" Jack Unbalanced Out +21dBu ±1dBu

1KHz )

Headphone Output 150mw ±5mw @ 32Ω

THD+N<0.025% @ + 14dBu ±0.5dBu

Frequency Response

20Hz~20kHz ±2dB

Hum and Noise 20Hz-20KHz -127dBu ±5dBu Mic Pre Equivalent Input Noise(150R)-85dBu ±5dBu Residual Noise

S/N

78dB ±5dB @ Fader Max

FFT-62dBv ±5dBv @ Gain Fader Max

CMRR

62dB ±5dB @ 1KHz

Maximum Input Level

Mic +4dBu ±1dBu
Channel Line +21dBu ±1dBu
Stereo Line +21dBu ±1dBu
AUX Return In +21dBu ±1dBu

Impedances

Mic: Balanced 6KΩ, Unbalanced 3KΩ ±200ohms
Line: Balanced 44KΩ, Unbalanced 22KΩ ±2KΩAUX Return: Balanced 20KΩ, Unbalanced 10KΩ ±2KΩAll Other Unbalanced outputs: 100Ω, Balanced Outputs: 50Ω

Mono Input Channel Gain

50dB Variable MIC (0~-50dB) Line (-20dB~ +30dB)

Input Channel EQ

High (±10dB) ±1.5dB 12kHz Shelving
Mid (±10dB) ±1.5dB 1kHz Shelving
Low (±10dB) ±1.5dB 80Hz Shelving

Effect Out

16x Effects: (1)Hall1 (2)Hall2 (3)Room1 (4)Room2 (5)Room3(6)Platereverb1 (7)Platereverb2 (8)Platereverb3 (9)Chorus(10)Flange (11)Delay1 (12)Delay2 (13)Chorus/Room1 (14)Chorus/
Room2 (15)Bypass (16)Rotaryspeaker

Level Meter

12 Segment LED x2 (Output of +4dBu = 0dB) Main L/R

AC Power options

AC100V-240V~ 50/60Hz

Dimensions (H x W x D)

80mm x 400mm x 369mm

Weight5.2kg

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SL824USB & SL1224USB Studio/Live Mixer

0dBu=0.775Vrms
Maximum Balanced Output

SL1224USB
Main XLR Balanced Out +26.5dBu ±1dBu

Level (1%T.H.D. at 1KHz )Main ¼" Jack Balanced Out +26.5dBu ±1dBu

Maximum Unbalanced

Main XLR Unbalanced Out +21dBu ±1dBu

Output Level (1%T.H.D. atMain ¼" Jack Unbalanced Out +21dBu ±1dBu

1KHz )

Headphone Output 150mw ±5mw @ 32ohms

THD+N<0.025% @ + 14dBu ±0.5dBu

Frequency Response

20Hz~20kHz ±2dB

Hum and Noise 20Hz--127dBu ±5dBu Mic Pre Equivalent Input Noise

20KHz(150R)-85dBu ±5dBu Residual Noise

S/N

78dB ±5dB @ Fader Max

FFT-62dBv ±5dBv @ Gain Fader Max

CMRR

62dB ±5dB @ 1KHz

Maximum Input Level

Mic +4dBu ±1dBu
Channel Line +21dBu ±1dBu
Stereo Line +21dBu ±1dBu
AUX Return In +21dBu ±1dBu

Impedances

Mic: Balanced 6KΩ, Unbalanced 3KΩ ±200Ω
Line: Balanced 44KΩ, Unbalanced 22KΩ ±2KΩAUX Return: Balanced 20KΩ, Unbalanced 10KΩ ±2KΩAll Other Unbalanced Outputs: 100Ω, Balanced Outputs: 50ohms

Mono Input Channel Gain

50dB Variable MIC (0~ -50dB) Line (-20dB~ +30dB)

Input Channel EQ

High (±10dB) ±1.5dB 12kHz Shelving
Mid (±10dB) ±1.5dB 1kHz Shelving
Low (±10dB) ±1.5dB 80Hz Shelving

Effect Out

16x Effects: (1)Hall1 (2)Hall2 (3)Room1 (4)Room2 (5)Room3(6)Platereverb1 (7)Platereverb2 (8)Platereverb3 (9)Chorus(10)Flange (11)Delay1 (12)Delay2 (13)Chorus/Room1 (14)Chorus/
Room2 (15)Bypass (16)Rotaryspeaker

Level Meter

12 Segment LEDx2 (Output of +4dBu = 0dBu) Main L/R

AC Power options

AC100V-240V~ 50/60Hz

Dimensions(H x W x D)

80mm x 400mm x 475mm

Weight6.85kgWHARFEDALE PRO LIMITED WARRANTY
Wharfedale Pro SL Series products are warranted of manufacturing or material defects for aperiod of one year from the original date of purchase. In the event of malfunction, contact yourauthorized Wharfedale Pro dealer or distributor for information.
*Be aware that warranty details may differ from country to country. Contact your dealers or
distributor for information. These terms do not infringe your statutory rights.
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Wharfedale Professional
IAG HOUSE, Sovereign Court, Ermine Business Park Huntingdon, Cambs, PE29 6XU, England
www.wharfedalepro.com
Wharfedale Professional reserves the right to alter or improve specifications without notice.
All rights reserved © 2010 Wharfedale Pro. Wharfedale Pro is a member of the IAG Group.

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