Senal ASM-4 User manual

ASM-4
USER’S GUIDE
Table of Contents:
Introduction ................... 2
Overview ........................ 3
Precautions ....................4
Setting Up ..................5-9
Specifications ........ 10-11
Troubleshooting ....12-13
Warranty ....................... 14

2
Thank you for choosing Senal.
The Senal ASM-4 Two-Way Active Speaker is designed for
near-field monitoring in professional audio applications. The
ASM-4 features active filter technology and a dual-channel
power amplifier, driven by a 4″ woofer and 0.8″ metal dome
tweeter that deliver a wide and flat frequency response with
pristine audio reproduction and accurate sound imaging. The
cabinet’s curved port tube provides natural low-frequency
output and minimizes distortion, while the ellipsoidal
design and rigid, high-intensity aluminum alloy construction
prevent diffraction and cabinet resonance. This meticulous
engineering allows the ASM-4 to handle high sound pressure
levels in a compact cabinet size.
Fine-tune settings allow the user to adjust the high, mid, and
low frequencies to compensate for the listening environment,
speaker placement, and audio source. There is also a three-
position high-pass filter for low-frequency cutoff that makes
it easy to match the speaker with a subwoofer. The ASM-4
comes with a rubber base that isolates the speaker from its
resting surface to prevent resonant coupling, and makes it
easy to adjust the vertical angle of the speaker to down fire or
up fire. The speaker can also be mounted on a wall or a stand
via the mounting threads on the cabinet.
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Introduction

3
Overview
▪ ▪ ▪ ▪ ▪ ▪ ▪ ▪ ▪ ▪ ▪ ▪ ▪ ▪ ▪ ▪ ▪ ▪ ▪ ▪ ▪ ▪ ▪ ▪ ▪ ▪ ▪ ▪ ▪ ▪ ▪ ▪ ▪ ▪ ▪ ▪ ▪ ▪ ▪ ▪ ▪ ▪ ▪ ▪ ▪ ▪ ▪ ▪ ▪ ▪ ▪ ▪ ▪ ▪ ▪ ▪ ▪ ▪
Fine-tune settings
HF High frequency
MF Mid frequency
LF Low frequency
HP High-pass filter
Overview
Power LED
Also Included:
XLR to XLR cable
XLR to RCA cable
AC power cable
User manual
Power input
XLR input
Mounting thread
Tweeter
Woofer
Power switch
Volume control
Vent
Mounting threads
Rubber base

4
Precautions
▪ Please read and follow these instructions, and keep this
manual in a safe place.
▪ Exposure to high sound levels can cause permanent
hearing loss. Avoid listening at high volumes for extended
periods of time.
▪ Keep this product away from water, moisture, and any
flammable gases or liquids.
▪ Make sure this product is powered off when plugging it
into a power source.
▪ Use only the correct, recommended voltage.
▪ Do not attempt to disassemble or repair this product.
There are components inside that can produce a
hazardous electric shock.
▪ Handle this product with care.
▪ Clean this product with only a soft, dry cloth.
▪ Keep this product away from children.
▪ All photos are for illustrative purposes only.
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Precautions

5
Setting Up
Mounting the Speaker
For desktop placement,
place the speaker on the
included rubber base. This
base serves to isolate the
speaker from its resting
surface and prevent
resonant coupling. The base
is designed to make it easy
for you to adjust the vertical
angle of the speaker to
down fire or up fire, so you
can aim the acoustic axis at
the listener’s ear.
The speaker may also be mounted on a wall via the mounting
threads on the rear of the cabinet, or on a speaker stand via
the threaded mount on the bottom of the cabinet. To mount
the speaker on a wall, you can use the Senal speaker bracket
kit, sold separately.
Setting Up
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3.5˝
R
R
R
RCL
L
L
C
L
LS RS
LS RS
110°
30°
R
R
R
RCL
L
L
C
L
LS RS
LS RS
110°
30°

6
Speaker Placement and Positioning
Position the speakers 2.3′ to 6′ (0.7
to 1.8 m) from where the listener will
be situated, and aim the tweeter
at the approximate height of the
listener’s ears. There should be no
obstructions between the speakers
and the listener. Each speaker should
be 3.5″ (9 cm) or more from the wall
to prevent early reflections, which
can interfere with stereo imaging.
For stereo placement, space the speakers equally to form an
equilateral triangle with the listener at the third point of the
triangle.
For five-channel placement, arrange the speakers in a circle,
with the listener in the center. As with stereo placement, the
left and right speakers should form an equilateral triangle
with the listener. Place the center speaker between the left
and right speakers, so they are spaced evenly at 30° from
each other. Place the rear left and rear right speakers behind
the listener, at an angle of 100° to 120° from the center
speaker.
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Setting Up
R
R
R
RCL
L
L
C
L
LS RS
LS RS
110°
30°
R
R
R
RCL
L
L
C
L
LS RS
LS RS
110°
30°
3.5˝

7
Note that both setups are perfectly symmetrical, with each
speaker at an equal distance from the listener, and the right
and left sides a mirror image from each other. For optimal
audio performance, the listener and the center speaker
should be on the centerline of the room.
The Listening Environment
A room with dimensions that are multiples of each other,
such as a room that is twice as wide as it is tall, may result
in standing waves that can blur the bass frequencies. Large
areas of a smooth material like glass will cause acoustic
reflections and may interfere with sound-field reproduction
and imaging. You can avoid reflections by strategically
placing sound-absorbing materials like acoustic foam,
carpeting, and heavy curtains around the room.
Connecting the Speaker
Before connecting your speaker to the audio source and
the power source, make sure that the speaker and the audio
source are turned off and that the volume controls are turned
all the way down.
Setting Up
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R
R
R
RCL
L
L
C
L
LS RS
LS RS
110°
30°
R
R
R
RCL
L
L
C
L
LS RS
LS RS
110°
30°

8
1. Determine whether the line level output of your audio
source requires an XLR or an RCA connector. If your
audio source requires an XLR connector, use the included
XLR to XLR cable. If your audio source requires an RCA
connector, use the included XLR to RCA cable.
2. Use the included AC power cable to plug the speaker into
an AC power source.
3. Turn on your audio source and the speaker.
4. Use the volume controls on the speaker and your audio
source to adjust the audio level. When using an audio
source that has its own master level, such as a recording
console, turn the volume on the speaker all the way up,
and control the volume through the master level on the
console.
Fine-Tune Settings
You can fine-tune the frequency response of the speaker via
four fine-tune settings on the rear of the cabinet.
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Setting Up
Audio Source
Power Source

9
Setting Up
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You can adjust the high frequency (HF) by ±1 dB and the low
frequency (LF) by ±2 dB. We recommend adjusting these to
suit the listening environment.
You can adjust the mid frequency (MF) by
-2 and -4 dB. We recommend adjusting
these to suit your speaker placement.
When the speaker is placed on a stand or
mounted on a wall, we recommend setting
the MF switch to 0. When the speaker is
placed on a desk or table and its face is
3.1″ to 9.8″ (8 to 25 cm) from the edge of
the desk, we recommend setting the MF
switch to -2. When the speaker is more than
9.8″ (25 cm) from the edge of the desk,
we recommend setting the MF switch to
-4. These measurements are approximate
and will depend on your specific listening
environment.
You can adjust the high-pass (HP) filter to
cut off low frequencies at 60, 66, and 72
Hz. This feature is ideal when matching the
speaker with a subwoofer. When using the
speaker in pairs, we recommend setting the
HP switch to 60 Hz.
60
66
72
HF MFLF HP
60
66
72
HF MFLF HP
60
66
72
HF MFLF HP
60
66
72
HF MFLF HP

10
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Specifications
Specifications
System series: Professional monitor active
filter speaker system
System type: Two-way vented
Drivers configuration: 4″ (101.6 mm) midwoofer, 0.8″
(20 mm) metal dome tweeter
Frequency range: 60 Hz to 20 kHz
(±2.5 dB, free space)
Sensitivity: 82 dB (28.83 V/1 m)
Nominal impedance: 6 Ω
Distortion: THD <0.05% (8 Ω)
Filter type: Professional active filter
Rated power: 45 W RMS/channel
Active crossover
frequency:
2.0 kHz
Bass adjustment range: + 2, 0, -2 dB (200 Hz)
Mid-low adjustment range: 0, - 2, -4 dB (500 Hz)
Treble adjustment range: +1, 0, -1 dB (10 kHz)
High-pass filter: 60, 66, 72 Hz