A4115H Amplifier Controls & Jacks; A4115H Amplifier Specifications; A4115H Speaker Specifications - Yamaha CP-20 Operating Manual

A4115H amplifier controls & jacks
Input Jacks: Two (parallel) standard tip-
sleeve phone jack which accept
unbalanced, line level sources.
Input Level Control: An input attenu-
ator controls the volume level of
the amplifier.
Input Level Switch: A slide switch
selects -20dBm or OdBm nominal
input level: for compatibility with
low or high level lines.
H.F. Level Control: An "L-Pad" attenu-
ator (for constant impedance) adjusts
the volume level of the high-
frequency driver.
A4115H amplifier specifications
Output Power: 100 Watts continuous
average sine wave power into an
8-ohm load at 0.1% T.H.D.
Frequency Response: 10Hz to 30kHz
*0, -1dB with the INPUT LEVEL
switch in the '"OdBm"' position;
40Hz to 50kHz +0, -3dB with the
INPUT LEVEL SWITCH in the
"-20dBm" position.
Power Bandwidth: 20Hz to 20kHz
(at 100 watts into an 8-ohm load
at 0.1% T.H.D.).
Total Harmonic Distortion: Less than
0.01% at 80 watts into 8 ohms.
Damping Factor: 90 from 20Hz to
3kHz.
Hum and Noise: -73dB (0.17mV)t
Slew Rate: 25 volts per microsecond.
Input Sensitivity (input level for 100-
watts into an 8-ohm load): OdB (0.775
volts) with the INPUT LEVEL switch
set at the "OdBm" position; -20dB
(77.5mV) with the INPUT LEVEL
switch set at the ''—20dBm"' position.
Input Impedance: 8k-ohms with the
INPUT LEVEL CONTROL at the
maximum clockwise position.
A4115H speaker specifications
System Impedance: 8-ohms nominal,
7-ohms minimum.
Sensitivity: 101dB SPL at 1 meter with
1 watt input (DIN and JIS standard)";
52dB SPL at 30 feet, 1 milliwatt
input (EIA standard).
Frequency Response: 70Hz to 15kHz,
*6dB (referred to 101dB SPL).
Dispersion: 70-degrees horizontal by
40-degrees vertical (angles between
6dB down points at 1kHz).
Crossover Transition Frequency and
Slope: 2kHz at 12dB/octave
Enclosure Type: Combination—
front-loaded horn/ducted-port bass
reflex, with separate high frequency
horn/compression driver.
Finish: Black leatherette with metal
corner caps and black (removable)
grille.
Dimensions:
Height: 908mm (35-3/4"')
Width: 610mm (24")
Depth: 452mm (17-3/4")
Weight: 58Kg (127.9lbs.)
Driver Nominal Cone | Voice Coil Nominal Continuous Pink- Peak Rated Power Magnet Flux
(Loudspeaker) Diameter Diameter Impedance | Sensitivity * * | Noise Power Rating Power Bandwidth Weight Density
Jwooter [jA3803| 15" (38cm) | 2.6" 16.8cm) | Bohms | 9948 120 Watts 240 Watts | 20Hz20kHz | 6.0K9 (13.2I08) | 12,500 Gauss
mam| [we aem todas [ 20Wans sowas | 2kre20Kne | 2269/0806) | 16,000 Gaus
NOTES: The Yamaha S4115H speaker system is identical to the A4115H, except it contains no amplifier.
In above specifications, when dB represents a specific voltage, OdB is referenced to 0.775V.
A4115H Frequency Response
Tob Ne ont dell
RESPONSE 198;
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FREQUENCY iha)
A4115H Horizontal 180? dispersion
A4115H Vertical 180? dispersion
? Measured with a 6dB/octave filter at
12.5kHz fequivalent to a 20kHz filter with
infinite dB/octave attenuation].
*Sensitivity at 4 feet, with 1 watt is 1.75dB
below DIN/JIS standard.
**Sensitivity is extremely significant, since
an increase of only 3dB in sensitivity is
equivalent to doubling the amplifier power.
In other words, a 50-Watt amp used with a
speaker that is 3dB more sensitive than
another speaker, will produce the same
sound level as a 100-Watt amp used with
the less sensitive speaker.
Specifications subject to change without notice.
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