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■ Subwoofer Parallel-connection
The subwoofer A15W features four input/parallel connectors—two 1/4" phone jacks and two Neutrik NL4MP con-
nectors. Use either a phone jack or a Neutrik connector to receive input from your sound system/power amplifier.
One of the spare connectors can be used to parallel-connect an additional main speaker (keeping in mind the imped-
ance considerations mentioned below).
■ Impedance Considerations
When connecting speakers in parallel be sure to check the rated load impedance of the power amplifier. Most power
amplifiers are capable of safely driving speakers with minimum impedance of 8 ohms or 4 ohms. A pair of parallel-
connected 8-ohm speakers have a total impedance of 4 ohms. Two 8-ohm speakers can safely be paralleled on one
output. 4-ohm speakers, however, should not be parallel-connected with other speakers. These models can be con-
nected in parallel, however, if you are using a power amplifier that can safely drive load impedances of 2 ohms or
lower. Check your speaker impedance in the table below.
Specifications
Model
Type
LF
Speaker Unit
HF
Frequency Response
NOISE*
Power Capacity
PGM
MAX
Nominal Impedance
Sensitivity
Input Connectors
Socket Mount Diameter
Dimensions (W ×H ×D)
Weight
: EIA RS-426
*
A10/A12/A15
102.5
77.5
°
H
W
4
A10
10" cone
65 Hz-20 kHz
125 W
250 W
500 W
96 dB SPL (1 W, 1 m) 97 dB SPL (1 W, 1 m) 98 dB SPL (1 W, 1 m) 97 dB SPL (1 W, 1 m) 97 dB SPL (1 W, 1 m)
1/4" phone jack × 1, Neutrik SPEAKON NL4MP × 1
385 mm × 542 mm ×
405 mm × 582 mm ×
307 mm
13.0 kg
°
H
D
Specifications and descriptions in this owner's manual are for information purposes only. Yamaha Corp.
reserves the right to change or modify products or specifications at any time without prior notice. Since specifi-
cations, equipment or options may not be the same in every locale, please check with your Yamaha dealer.
A12
A15
2 way Bass reflex
12" cone
15" cone
1" VC, Horn-TW
60 Hz-20 kHz
150 W
200 W
300 W
400 W
600 W
800 W
8 Ω
35 mm (1 - 3/8")
470 mm × 672 mm ×
323 mm
375 mm
15.5 kg
21.5 kg
A12M
°
120
30
°
D
W
A12M
Bass reflex
12" cone
15" cone
50 Hz-200 Hz
65 Hz-20 kHz
with the internal low
pass filtering
150 W
300 W
600 W
1/4" phone jack × 2,
Neutrik SPEAKON
NL4MP × 2
582 mm × 405 mm ×
485 mm × 622 mm ×
323 mm
15.5 kg
A15W
H
W
Unit: mm
A15W
—
250 W
500 W
1000 W
485 mm
28.0 kg
D
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