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Components for Classroom
Infra Red Audio System
IRR-30P
RECEIVER
The
heart of the Azden infrared system is the
IRR-30P powered, dual-channel receiver. It
allows you to use and control the volume of
2 wireless microphones simultaneously,
either for "team-teaching, or to use the
handheld microphone for student pass-around.
The receiver also has 2 stereo auxiliary
inputs so that other line-level devices (CD
players, MP3 players, VCRs, etc.)can be
attached and played through the system. The
teacher can also send the audio to
a recorder or video camera, using the
line-level preamp-level jack. For bigger
rooms orodd-shaped rooms up to 3 additional
external sensors can be attached. With all 4
of the
ceiling speakers attached to the IRR-30P,
sound is spread equally throughout the room,
allowing all students to hear equally.
IRN-10 MICROPHONE
A lightweight,
chest worn, microphone/transmitter , it
comes with an adjustable lanyard. It is both
a microphone and infrared
transmitter which wirelessly "links" the
teacher to the IRR-30P receiver. It has a
specially designed internal microphone array
which provides great sound pick-up. With two
switchable channels, a teacher can go from
classroom to classroom with the same
microphone! W ith just two "AA" batteries
(alkaline or rechargeable) the microphone
can be used the entire school day without
recharging or changing batteries.
IRH-15c HANDHELD
MICROPHONE
The perfect
handheld "pass-around" microphone for
student participation, this dual channel
microphone/transmitter , operates on the
channel that the teacher is not using. It is
powered by two "AA" batteries (alkaline or
rechargeable) and is compatible with all
Azden infrared models.Both the IRN-10 and
IRH-15c can recharge internal NiMH batteries
when a BC-29 wall-charger is used. There's
no need to remove the batteries to recharge.
IRD-60 SENSOR
In most classroom
situations, a single wellpositioned IRD-60
external IR sensor provides complete
classroom coverage. Mounting is easy
and the sensor is connected to the IRR-30P
,receiver with standard coaxial wire.
Recommended
Speakers
To get the maximum power of
IRR-30P, ceiling or wall speaker adapted
impedance 4 ohm, passive type one is
recommended to connect with IRR-30P.
Classroom wireless audio system
Specifications
IRR-30P
2-channel receiver w/power amplifier
IRN-10 2-channel
chest-worn transmitter
Sub-carrier frequencies
2.06MHz & 2.56MHz
Sub-carrier frequencies
2.06MHz & 2.56MHz switchable
Type
Super heterodyne - crystal controlled
Modulation
FM
Modulation
FM Microphone element type Uni-directional electret x 2
Signal-to-Noise
>75dB A weighted
Frequency response 50-9KHz ±3dB
Reception sensitivity
>25db/V Ext. Mic input impedance 2.2k ohms
Line Input impedance
32K ohms ±15% Ext. Mic input jack φ3.5mm
Line Output adjustment
-∞ ~ +10dBu Ext. Mic Voltage/Our rent 3.5VDC@ 1mA (to power electret
Audio Output
5W x 4 @ 4 ohms
mic element)
Power requirement 15VDC @ 2.7A(use model BC-30) Mic gain adjustment
+6dB~ －10dB
Size 8.03''W x 9.19'' D x 1.73'' H (204 x 233 x
44mm) Battery type
2-"AA" alkaline (1.5V x 2)
Weight 2.86lb(1.3kg) 2-"AA" rechargeable NiMH (1.2V x 2)
Battery
life
> 8 hours w/alkaline batteries
Size 3
15" H x 2.75" W x 1.06" D (80 x 70 x 27mm)
Weight
4.3oz (120g) w/alkaline batteries
IRH-15C 2-channel handheld
transmitter
IRD-60 Dome sensor
Sub-carrier frequencies
2.06MHz & 2.56MHz switchable
Output
F Connector
Modulation FM
Power
powered by receiver (24V @ 15mA)
Microphone element type
Uni-directional dynamic
Cable
requirement
RG59 - 75 ohm coaxial
Frequency Response 50-8KHz ±3dB
Size 3.94" x 1.18" (100 x 30mm)
Battery type 2-"AA" alkaline( 1.5V x 2 )
Weight 6.00oz (170g) w/mounting bracket
2-"AA" rechargeable NiMH (1.2V x 2 )
Battery life
> 6 hours w/alkaline batteries
Size
9.65''x ~1.375" (245 x
~35mm)
Weight
9.1oz(258g) w/alkaline batteries
Specifications will change without prior
notice due to improvement. |
