Owner`s manual

Roswell Marine Audio Amplier Owner’s Manual
REV. 02-Feb-14
Pg. 4/19
ltered out. A subwoofer will not sound natural if it is playing mid range frequencies. Careful
adjustment is needed to ensure that all speakers are playing the right frequencies and that they are
left with no gaps in the frequency response.
• HPF (High-Pass Filter) - A high-pass lter allows high frequency signals to pass through while
reducing all signals lower than the cutoff frequency setting on its dial.
• LPF (Low-Pass Filter) - A low-pass lter allows low frequency signals to pass through while
reducing all signals higher than the cutoff frequency setting on its dial.
• Bandpass Filter (BP) - Uses both the high-pass and low-pass lters in order to only play a
selected range of frequencies.
• Subsonic - A Subsonic lter allows higher frequency signals to pass through while reducing
all signals lower than the cutoff frequency set on its dial. This allows you to remove unwanted
frequencies in order to protect your equipment. Typically this should be set in the 30Hz range.
Note: As an added benet to you, all low-pass lters work in conjunction with the high-pass to
function as a bandpass. In low-pass mode your high-pass dial functions as a subsonic lter.
We recommend this be set around 30Hz as anything below this level is wasting battery power
and could cause potential damage to your speaker.
• Full - Allows the full range of frequencies to pass through.
• Double - This setting applies the crossover settings of channels 3 and 4 to all four channels.
This applies to the 600.4 amplier only. Typically this setting is used when powering two
identical speakers in bridged mode.
60 70 80 90 100 110 120 130 140 150
Frequency (Hz)
HPF Frequency Response Curve
(illustrates crossover set at 90Hz)
Amplitude (dB)
10 20 30 40 50 60 70 80 90 100
Frequency (Hz)
LPF Frequency Response Curve
(illustrates crossover set at 80Hz)
Amplitude (dB)
10 20 30 40 50 60 70 80 90 100
Frequency (Hz)
BPF Frequency Response Curve
(illustrates HPF set at 40Hz & LPF set at 80Hz)
Amplitude (dB)