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Comparison Marantz MM7055 vs Marantz MM7025

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Marantz MM7055
Marantz MM7025
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Device typeamplifieramplifier
Element basetransistortransistor
Amplifier parameters
Number of channels52
Frequency range
5 – 40000 Hz /at a resistance of 8 ohms/
5 – 40000 Hz /at a resistance of 8 ohms/
Power per channel (8Ω)140 W140 W
Power per channel (6Ω)170 W170 W
Signal-to-noise ratio (Main)105 dB105 dB
Damping factor100100
Harmonic distortion0.03 %0.03 %
Channel sensitivity / impedance
Balanced XLR input
2400 mV
30 kOhm
2400 mV
30 kOhm
Line input
1200 mV
22 kOhm
1200 mV
22 kOhm
Connectors
Inputs
control input (IR) /2/
control input (IR) /2/
To amplifier (Main)RCA/XLRRCA/XLR
Trigger1 шт1 шт
For acoustics5 шт2 шт
Trigger output1 шт1 шт
Features
More features
By-pass/Direct
auto power off
By-pass/Direct
auto power off
General
PSUinternalinternal
Power consumption660 W330 W
Standby consumption0.2 W0.2 W
Dimensions (WxDxH)440x384x183 mm440х352х126 mm
Weight15.7 kg10.8 kg
Color
Added to E-Catalogfebruary 2014february 2014

Number of channels

The maximum number of channels the amplifier can handle. The choice for this parameter depends primarily on the intended format of using the device.

Most modern amplifiers have two channels for normal stereo sound, which is enough for listening to music or radio programs. There are also models designed for multi-channel "surround" sound, but they are much less common. This is due to the fact that such sound is most often used as an accompaniment to high-quality video — and therefore a home theater receiver is usually used for processing, rather than a separate audio amplifier.

Among the top-class models, there may be single-channel amplifiers — they provide maximum opportunities for fine-tuning the sound, but you have to purchase several such devices, one per channel. Another specific variety is amplifiers designed to add a certain number of channels to those already available; the most popular of these options is 3-channel, capable of turning an existing stereo system into a multi-channel one.

For acoustics

The number of outputs in the design of the amplifier, designed for direct connection of speakers. One such output is usually a pair of screw terminals designed to connect one speaker. Accordingly, the standard set for sound in stereo mode is two outputs (two pairs). However, in multi-channel devices (see “Number of channels”), as well as in models with the ability to connect additional speakers and/or Bi-Wiring (see “Additionally”), more speaker outputs are installed — in accordance with the capabilities of the amplifier.

Power consumption

The power consumed by the amplifier during normal operation. Some manufacturers may indicate average power values, some — indicators at maximum load. However, anyway, this parameter allows you to quite adequately assess the power consumption of the device and the requirements for connected power.

In addition, it can be useful if you have doubts about the accuracy of the claimed data on the output power (see "Power per channel (8Ω)"). The basic rule is that the total power rating of all channels cannot exceed the total power consumption of the amplifier. In addition, there are special formulas that allow you to derive the maximum possible rated power depending on the power supply and type of amplifier; they can be found in special sources.
Marantz MM7055 often compared
Marantz MM7025 often compared