INSTRUCTION MANUAL
A-257DTM Version 1.7
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A-257DTM
WARNING:
Installation by qualified personnel only.
Speakers must be wired in parallel and connected to
the correct line terminals of amplifier.
Ensure that all speakers have the same polarity with
respect to each other.
Do not select another tapings if the speaker is in use.
No naked flame sources, such as lighted candles,
should be placed on the apparatus
.
CEILING SPEAKER
SPECIFICATIONS
Step 1 – Cutout the hole size,
either by tracing the cardboard cutout template or with a circular cutter set to the cutout size.
Step 2 – Pull the wiring through the cutout hole.
Step 3 – Connect the speaker wires.
Please, ensure that the polarity is correct.
Step 4 – Insert the speaker into the ceiling and tighten.
Insert the speaker into the ceiling as far as it goes, until the front rim touches the
ceiling. Turn the attachment screws CLOCKWISE to tighten the mounting tabs.
DO NOT OVERTIGHTEN.
Step 5 - Connect the speaker
. If you use a high impedance line (100 / 70 V), connect it to the corresponding transformer terminal according to
the desired power. If you use an 8
line, disconnect the transformer cables and connect it directly to the speaker terminals.
Model
A-257DTM
Loudspeaker
Woofer 6.5” Kevlar
Tweeter 0.75”
Rated Power (RMS)
60 W at 8
, 20 W at 100 V
Power Taps 100V
20 W, 10 W & 5 W
Impedance
666
, 1k3
, 2k7
& 8
Sensitivity
90 dB SPL at 1 W, 1 m & 1 kHz
Sound Pressure
103 at 20 W, 1 m & 1 kHz
Frequency Range
65 ~ 20000 Hz
Cutout Size
Ø 210 mm
Dimension (mm)
Ø 227 x 87 (depth)
Weight
1.75 kg
Finish
ABS, metallic grille
Colour
White
Mounting
Rotary tabs
INSTALLATION GUIDE
Tweeter Equ3 dB/-3 dB
