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SPX613 & SPX815 Powered Mixers
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WHARFEDALE PRO SPX613 / SPX815 OWNER S MANUAL
Page 4
FEATURES AND CONTROLS
Mono Mic/Line Input Channels:
1. Low Impedance (Low Z) Mic Input jacks with switchable global phantom
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power: The low noise, high headroom Low Z mic inputs are for use with balanced, low impedance
microphones.
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2. Hi-Z Line Level Input jacks: These Tip, Ring, Sleeve (TRS) jacks are designed to be
connected to (-10 to +4dBu) balanced or unbalanced line level sources.
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3. Super Hi-Z inputs: Channels 6 & 7 on the SPX613 and Channels 8 & 9 on the SPX815 for
connection of unbalanced, low level instrument signals such as an electric guitar or electric bass.
4. Stereo Line Level Input jacks: Channels 8 & 10 on the SPX613 and Channels 10 & 12 on
the SPX815. These dual Tip, Ring, Sleeve (TRS) and dual RCA phono jacks are designed to be
connected to (-10 to +4dBu) balanced or unbalanced line level sources. A mono signal can be
connected by using only the left input jack. The mono signal, connected like this, will be routed to both
left and right outputs and will be controlled by the position of the pan knob of that channel.
5. USB Stereo Input and Output
This digital input and output is provided to allow for the direct digital connection to a computer USB
and the input signal is routed to
channel input 9-10 on the SPX613 and channel 12-13 on the SPX815. Consult the manufacturer of
your software for details. The USB input is not disabled by the input of line level signals to the
jacks on the channel. Both the analog and digital signal can be used simultaneously.
6. Level Control: Adjusts the level of the input signal to the mixer.
7. TRIM Control: In order to achieve the best signal to noise ratio and adequate dynamic range,
the input preamp level of each mono channel is controlled by the TRIM control knob on each channel.
To set the TRIM control, watch the PEAK LED while the signal source for that channel is active
(whether it be a singer using a microphone or an instrument connected to the LINE INPUT of the
channel). If the PEAK LED (#8) on the channel lights up consistently, the Gain Control is set too high.
The ideal setting is obtained, when the PEAK LED only flashes periodically.
8. PEAK indicator LED: The PEAK indicator LED will illuminate when the input signal level is
3dB before clipping (signal distortion).
9. PAN Control: On the mono channels, the PAN control adjusts the balance of the signal being
sent to the left and right MAIN MIX. Turning the PAN control fully left on a stereo channel will cause
the right input's signal level to decrease. Turning the PAN control fully right on a stereo channel will
cause the left input's signal level to decrease.
10. EQ (Equalization): Each mono channel on the SPX Series mixers features a three band
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Equalization ( EQ ) section. Each band allows for up to 15 decibels of boost (increase) or cut
(decrease) of the signal in the tone range for which it controls (HI, MID, LOW). In the center
position, the equalizer is bypassed (FLAT) and the control has no effect on the tonal characteristics of
the signal. The HI EQ control is centered at 12kHz, the MID EQ control is centered at 2.5kHz and the
LOW EQ control is centered at 80Hz. Stereo channels have two band equalization with the HI EQ
control is centered at 10kHz and the LOW EQ control is centered at 100Hz.
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port for both the playback and recording of signals to and from a digital audio software program. The
output signal is derived from the stereo Main Mix, pre master level,
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detented