7
SPA-150R-L
Owner’s Manual
POWER CABLE
This unit is powered by electricity. Before you start using it,
plug the power cable into the AC IN jack and the power plug
into the AC outlet securely. After using it, pull the cable off
the outlet by holding the power plug.
POWER SWITCH
This is the switch to turn [ON/OFF] this unit. While the
power is ON, the power indicator lights on.
Make sure the power is OFF before you connect any external
equipment to this unit, and prevent noise.
Set the Master Volume knob (12) at minimum before you
switch the power ON, thus a sudden loud sound is avoided.
This unit is designed not to produce sound for the first ap-
prox. 3 seconds after switched on, for protection of the inter-
nal circuits.
to INPUT 1 - 4 JACK
These are voice input terminals. You can connect such exter-
nal equipment as mics, Melodions, keyboards, a CD player,
etc. from the level of mic to line. The terminals are monaural
1/4
˝
phone jacks.
LINE OUT JACK
This is an output terminal for connecting to a recorder or an-
other amplifier for obtaining more volume. The output is line
level, and the terminal is a monaural 1/4
˝
phone jack.
to VOLUME KNOBS 1 - 4
They control the volume of the external equipment connect-
ed to the input jack. At 0, it does not sound. Turning the knob
to the right increases the volume.
MASTER VOLUME KNOB
This knob controls the volume of the entire unit.
You can reduce the noise to a minimum by setting the Vol-
ume Knobs 1 - 4 as high as possible within the limit that no
distortion appears and then get the desired volume by adjust-
ing the Master Volume.
Also, use this knob, if you want to temporarily turn off the
sound, maintaining the balance among the Knobs 1 - 4.
to TONE KNOBS 1 - 2
These knobs adjust the tonal quality of the INPUT 1 and IN-
PUT 2.
The standard setting is at the center. Heaviness of the sound
increases, if you raise the Bass. And, if you drop the Bass, it
decreases and also the wind noise reduces, while a micro-
phone is connected. If you raise the Treble, brilliance of the
sound increases. If you lower it, the sound gets soft.
The [BASS] knob has a special function: At center, it is elec-
trically flat. And at “
”, it makes up the sub-bass of woofer
with slightly bass boost.
to TONE KNOBS 3 - 4
These knobs control the sound quality of INPUT 3 and IN-
PUT 4.
REV. SWITCH
This switch sets whether or not to add the reverb effect to
INPUT 3 and INPUT 4. If you turn off this switch, no reverb
effect is added to the INPUTS 3 or 4.
Regardless of the position of this switch, the reverb effect is
always added to the INPUT 1 and INPUT 2, as set by the
REVERB Knob (18).
REVERB KNOB
This is for adding the reverb effect to the sound as if in the
concert hall.
No reverb effect is added at 0. If you turn the knob to the
right, the effect deepens.
HANDLE
This handle is for transportation.
POLE SOCKET
This socket is for mounting the unit on to the speaker stand
(not included - optional).
This corresponds to a pole of 35mm (13/8
˝
) in diameter
(thickness).
CAUTION
Please be careful when mounting it to the speaker stand.
w
Place the stand on a flat stable surface.
w
Use the stand at lowest height (TS-70B) or under 1.3m (4
´
3
˝
) (others).
w
Use the stand by fully opening the legs.
w
Don’t let anybody come near the stand unnecessarily.
w
Use one stand for one unit.
w
Use only the designated screws for assembly.
w
Securely tighten the screws.
w
Detach the unit before you move the stand or adjust the
height.
HIGH TEMPERATURE PROTECTION CIRCUIT
If you continue using this unit at a large volume, the internal
temperature rises and it may stop functioning. In such a case,
stop using this unit until the temperature goes down and it
functions again.
If the temperature goes up frequently, use this unit at a lower
volume.
You need not switch off the power while the unit is being
cooled down.