User Manual

SA248 Spectrum Intelligent Filter User Guide 54
Factory Reset using the Neuro Desktop Editor
Connect the Spectrum Intelligent Filter to the Neuro Desktop Editor. From the top bar menu select
Device > Factory Reset > when the Confirm Factory Reset window pops up, select “Yes.”
Noise
Power source: Ensure that the factory power supply is being used, or an isolated power supply or
pedal power port providing 9V and a minimum of 165mA.
Near noise source: Move pedal away from power supplies and other equipment.
Other equipment: Remove other effects from signal chain; see if noise persists.
Bad cables: Swap out audio cables.
USB ground loop: When connected to a computer using a USB cable, noise can appear in the audio
signal. This usually results from ground loop noise due to the Spectrum and computer running on
separate power supplies. In the case of laptops, disconnecting the computer’s power supply and
running it on a battery can often mitigate the noise. External display monitors are often the primary
source of noise, and powering down monitors can also resolve noise issues.
Unit Appears Dead / No LEDs Lit
Effect is bypassed: Press the footswitch to enable the effect and see if the main LED turns on.
Wrong power supply: Use correct power supply. See the DC 9V (Power) section for more details.
Corroded power cable plug: Check power plug for corrosion on sleeve. Swap out power supply if
necessary.
Frequently Asked Questions
What kind of instruments can I connect to the Spectrum’s inputs?
The Spectrum’s audio inputs are high impedance (~ 1 MΩ). It can accept high impedance signal
sources like guitars/basses with passive pickups, as well as low impedance sources like line-level
audio circuits, guitars/basses with active pickups, electronic keyboards, or mixer outputs. The input
circuit can handle signals ranging up to 5.6 Volts, peak-to-peak.
Can I power the Spectrum directly over USB, without using the 9 Volt supply?
No. USB provides 5 Volts, but the Spectrum needs 9 Volts, so the pedal cannot be powered directly
from USB. Make sure that you have plugged in the included 9V DC power supply when connecting to
the Spectrum’s USB port.
When connecting the Spectrum to a recording interface or mixer, should I used a Lo-Z
(microphone) or Hi-Z (line / instrument) input?
The Spectrum’s output will be low impedance when the effect is active or in buffered bypass mode,
but it will be high impedance when using true bypass mode and a guitar with passive pickups.
Therefore, it is recommended that you use a high impedance (Hi-Z) input on your recording interface
or mixer to avoid signal loss.