Manuals / NAD / Home Audio / Stereo Amplifier

NAD Official Manual for Amplifier: Learn About Features and Setup

Models: C370

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BI-AMPING

Some loudspeakers have separate connection terminals for the LF (Low Frequency) and HF (High Frequency) sections of the speaker. This facility allows to "Bi-Amp" these speakers, where a separate power amplifier is used for the LF and HF section, which may improve overall sound quality.

The NAD C370 provides two sets of pre amplifier outputs (PRE OUT 1 & 2) to facilitate the connections for Bi-Amping. Moreover, the level from PRE OUT 2 can be reduced in relation to PRE OUT 1 to accommodate power amplifiers with different gain (amplification factor).

To set up the C370 with power amplifiers first decide which power amplifier has the highest gain. This is easily done by comparing the loudness level of the power amplifiers in an identical system (keep the volume control at the same level; use the same source and speakers). The amplifier that plays louder has the highest gain (note that this does not need to be the more powerful amplifier of the two). Connect the amplifier with highest gain to the PRE OUT 2 (No. 10) sockets; the other power amplifier to the PRE OUT 1 (No. 8) sockets.

From the maximum level position (0dB), use the VOLUME PRE OUT 2 control (No. 11) to reduce the output level of PRE OUT 2 so that the volume level of both power amplifiers is exactly matched.

NOTES: The gain of the NAD C270 power amplifier is identical to that of the C370's built-in power amplifier (in fact, the C270 and C370's power amplifier section are almost identical). When combined with the NAD C270 for Bi-Amping, leave the PRE-OUT 1 connected, with the links provided, to MAIN-IN. Connect the C270 to the PRE-OUT 2 output. Set the VOLUME PRE-OUT 2 control to its maximum position.

The provided links to connect from PRE-OUT 1 to MAIN-IN can also be used to connect from PRE-OUT 2 to MAIN-IN, should the C370's power amplifier have the highest gain. Always turn the C370 and external power amplifiers off before connecting or disconnecting anything from Pre-Out and to Main-In sockets.

REMOTE CONTROL HANDSET (FIGURE 3)

The Remote Control handset handles all the key functions of the NAD C370 and has additional controls to remotely operate NAD Tuners, Cassette and CD machines. It will operate up to a distance of 16ft (5m).

Alkaline batteries are recommended for maximum operating life. Two AAA (R 03) batteries should be fitted in the battery compartment at the rear of the Remote Control handset. When replacing batteries, check that they have been put in the right way round, as indicated on the base of the battery compartment.

Please refer to previous sections of the manual for a full description of individual functions.

When a command from the remote control is received, the Stand- by/protection indicator will blink. Note that the indicator may also blink when receiving commands not necessarily for the C370 but for other components in the system.

1. STANDBY/ON BUTTON

When the amplifier is switched On, pressing the green On/Off button on the remote handset will put the NAD-370 into Standby mode and the Power indicator will turn amber. The amber Power indicator shows that power is being supplied to the NAD-370, but the system is currently in the Standby Mode. Press again to switch the amplifier On from Stand-by mode.

2. POWER ON & OFF

Besides the On/Off toggle function of the green button (No. 1), the NAD C370 remote also has a separate On and Off button. This can be particularly useful to keep components within a system "in- sync": This way all components will switch to stand-by when Off is pressed or switch to operating mode when On is pressed, instead of some components switching On when the amplifier is switched to Stand-by. (Note that the other components have to be capable of responding to the separate On and Off commands as well).

Press the ON button to switch the unit from Stand-by to the operating mode; The Stand-by indicator (Fig. 2; No. 2) will turn from amber to green and the indicator for the last selected input will blink and light up. Press the OFF button to switch the unit to the Stand-by mode: The Stand-by indicator will light up amber.

3. SPEAKERS A & B

These buttons perform the same function as those on the front panel. The Speakers A and B buttons engage or disengage the speakers connected to respectively the Speakers A and Speakers B terminals on the rear panel.

Press A to switch the speakers connected to the speaker A terminals On or Off. Press B to switch the speakers connected to the speaker A terminals On or Off. The indicator directly over the buttons shows the status of speakers A and B.

4. MUTE

Press the MUTE Button (No. 4) to temporarily switch off the sound to the speakers and headphones. Mute mode is indicated by the active input indicator on the front panel flashing. Press MUTE again to restore sound. Mute does not affect recordings made using the Tape outputs but will affect the signal going to the Pre- amp outputs (Pre-Out 1 &2).

5. INPUTS

The input selector buttons (No. 5) perform the same functions as the buttons labelled the same on the front panel. There are a few differences and extra functions with the remote control handset however:

The TUNER AM & FM buttons select the Tuner input on the NAD C370 and respectively the AM or FM waveband on a separate remote controllable NAD Tuner (if supported by the tuner).

6. MASTER VOLUME

Press the MASTER VOLUME or (No. 6) buttons to increase, respectively decrease the loudness level. Release the button when the desired level is reached. The motorised Volume Control on the front panel will indicate the level set. The Master Volume buttons do not affect recordings made using the Tape outputs but will affect the signal going to the Pre-amp outputs (Pre-Out 1 &2).

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NAD C370 Bi-Amping, Remote Control Handset Figure, STANDBY/ON Button, Power on & OFF, Mute, Inputs, Master Volume
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C370 specifications

The NAD C370 is a powerful integrated amplifier that has earned a reputation for its high performance and exceptional sound quality. Building on NAD's long history of engineering innovative audio solutions, the C370 is designed to meet the needs of discerning audiophiles and casual listeners alike.

One of the main features of the C370 is its robust power output. The amplifier delivers 150 watts per channel into 8 ohms, which allows it to comfortably drive a wide range of speakers with ease. This high power output translates into dynamic sound reproduction, making it ideal for both music and home theater applications.

The C370 incorporates NAD’s proprietary PowerDrive technology, which enables it to deliver high current when needed, ensuring that transients are handled smoothly. This technology helps maintain the clarity and punch of audio signals, even at higher volumes. Furthermore, the amplifier has a solid build quality, featuring a heavy-duty chassis that minimizes vibrations and ensures long-term durability.

Another significant characteristic of the NAD C370 is its utilization of advanced circuitry. The amplifier uses a sophisticated feedback network that minimizes distortion and enhances linearity across the frequency spectrum. This results in an audio performance that is both clean and faithful to the source material. The low noise floor of the C370 ensures that even the most subtle details in a recording are preserved, making for an immersive listening experience.

In addition to its exceptional amplification capabilities, the NAD C370 offers an array of connectivity options. With multiple line-level inputs, a dedicated phono input for turntables, and preamp outputs, it is versatile enough to accommodate a wide range of sources. The inclusion of a headphone output also adds to its functionality, allowing for private listening sessions without sacrificing audio quality.

The C370 features an easy-to-use remote control, which enhances user convenience when navigating through its various functions. The user interface is intuitive, making it simple to adjust settings and switch between inputs.

In summary, the NAD C370 is an integrated amplifier that combines high power, advanced technology, and versatile connectivity options. With its emphasis on audio fidelity and robust performance, it stands as an appealing choice for audiophiles looking to elevate their sound experience. Whether listening to music or enjoying a movie, the C370 is designed to deliver an exceptional audio experience that meets the expectations of even the most critical listeners.