Marantz PM-11S3 Manual de instrucciones descargar pdf (Pagina 5)

Australian

Marantz PM-11S3 Integrated Ampliﬁer

CONTINUED FROM PAGE 24

LAB REPORT

LaboraTory TesT resuLTs

As you can see from the tabulated power

output ﬁgures, and the bar graphs generated

using those ﬁgures, the Marantz PM-11S3

very easily exceeds its speciﬁed output of

100-watts per channel into 8Ω loads and

200-watts per channel into 4Ω load. At 1kHz,

both channels driven, Newport Test Labs

measured the power output of its test sample

as being 153-watts per channel into 8Ω and

241-watts per channel into 4Ω. Into 2Ω (for

which the PM-11S3 is not rated) it delivered

335-watts per channel. The fact that the pow-

er supply is unregulated, and will thus ensure

greater ‘peak’ power ﬁgures is made obvious

by the increase in power output looking at

the single-channel ﬁgures, with the Marantz

PM-11S3 delivering 170-watts (8Ω), 273-watts

(4Ω) and 400-watts (2Ω) respectively. And

unlike some ampliﬁers, the Marantz produces

considerable power levels at the frequency

extremes of 20Hz and 20kHz.

Marantz has not restricted the frequency

response of the PM-11S3 either, with the

ampliﬁer returning a very wideband –3dB

response of 3Hz to 177kHz. The normalised

response is 5Hz to 91kHz ±0.5dB. Over the

audio band, the response is even ﬂatter,

as you can see from Graph 6, where the

black trace showing frequency response is

around 0.1dB down at 20Hz and 20kHz so,

normalised, the measurement is 20Hz–20kHz

±0.05dB. Furthermore, this response is true

both when the ampliﬁer was driving a non-

inductive laboratory test load (the black trace

on Graph 6) and when it was driving a load

that simulates that of a two-way bookshelf

loudspeaker (the red trace on Graph 6). Even

into this real-world load, the Marantz PM-

11S3’s frequency response is still 20Hz–20kHz

±0.05dB.

Channel separation (tabulated, but not

graphed) was excellent, measuring 81dB at

20Hz, 100dB at 1kHz and 115dB at 20kHz. All

three ﬁgures are above reproach, and far more

than will be required to ensure adequate

separation and perfect stereo imaging. The

same is true of the balance between the

channels (0.15dB) and the interchannel

phase errors. At and below 1kHz, the phase

error is tiny, while even the 1.23° error at

20kHz would never be perceptible, even with

program material selected speciﬁcally to

highlight it.

Distortion was superlatively low,

with Newport Test Labs measuring overall

THD+N ﬁgures of 0.005% referred to one-

watt and 0.003% referred to rated output.

Basically, this is so low as to be completely

imperceptible to the human ear. However,

even if you could hear some of the distortion,

you’d hear ‘good’ distortion because looking

at the spectrum analyses of the output signal

(Graphs 1 through 4), the only ‘signiﬁcant’

Marantz PM-11S3 Integrated Ampliﬁer — Lab Test Results

Test Measured Result Units/Comment

Frequency Response @ 1 watt o/p 5Hz – 91kHz –1dB

Frequency Response @ 1 watt o/p 3Hz – 177kHz –3dB

Channel Separation (dB) 81dB / 100dB / 115dB (20Hz / 1kHz / 20kHz)

Channel Balance 0.15 dB @ 1kHz

Interchannel Phase 0.06 / 0.06 / 1.23 degrees ( 20Hz / 1kHz / 20kHz)

THD+N 0.005% / 0.003% @ 1-watt / @ rated output

Signal-to-Noise (unwghted/wghted) 85dB / 91dB dB referred to 1-watt output

Signal-to-Noise (unwghted/wghted) 91dB / 97dB dB referred to rated output

Input Sensitivity (CD Input) 25mV / 245mV (1-watt / rated output)

Input Sensitivity (Balanced Input) 49mV / 490mV

Output Impedance 0.04 OC = V

Damping Factor 200 @1kHz

Power Consumption 0.25 / 45.6 watts (Standby / On)

Power Consumption 73.2 / 428 watts at 1-watt / at rated output

Mains Voltage Variation during Test 239 – 250 Minimum – Maximum

Marantz PM-11 S3 Ampliﬁer — Power Output Test Results

Channel Load () 20Hz

(watts)

20Hz

(dBW)

1kHz

(watts)

1kHz

(dBW)

20kHz

(watts)

20kHz

(dBW)

1 8  170 22.3 170 22.3 159 22.0

2 8  151 21.8 153 21.8 138 21.4

1 4  256 24.1 273 24.4 256 24.1

2 4  223 23.5 241 23.8 217 23.4

1 2  364 25.6 400 26.0 364 25.6

2 2  307 24.9 335 25.2 307 24.9

Note: Figures in the dBW column represent output level in decibels referred to one watt output.

CONTINUED ON PAGE 62

1 2 3 4 5 6 7

Comentarios a estos manuales

Sin comentarios

Marantz PM-11S3 Manual de instrucciones Pagina 5

Comentarios a estos manuales

Relacionado con productos y manuales para Amplificadores de audio Marantz PM-11S3