2155 Power Amplifier
Date of manufacture : Jan 85 - Jan 87
Please note that this document contains the text from the original product brochure, and some technical statements may now be out of date
•Power output conservatively rated at 55 watts per channel into 8 or 4 ohms.
•+3 dB IHF Dynamic Headroom for peaks: 110 W/ch at 8 ohms, 130 W/ch at 4 ohms.
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•Bridging circuit yields 150 watts continuous power, 250 watts IHF dynamic power.
•Exclusive NAD impedance selector optimises power delivery to either high or low speaker impedance.
•Soft Clipping™ minimises distortion at output levels above the rated power.
NAD leads the audio industry in producing amplifiers with
The 2155, which is simply the power amplifier section of the 3155 and 7155 packaged on a separate chassis, is NAD’s
The 2155 delivers substantially more than its conservatively rated 55 watts/channel into the complex and varying impedances of real loudspeakers. In the bridged monophonic mode this amplifier is rated conservatively at 150 watts continuous output. And these amplifiers maintain a full 3 dB of IHF dynamic headroom (2.5 dB in bridged mode), meaning that they deliver twice their rated power in brief bursts: over 110 watts/channel in stereo and about 250 watts in bridged configuration. This headroom for peaks is crucially important for reproducing the uncompressed transients in modern digital and DBX- encoded recordings.
When combined as a bridged stereo pair, these amplifiers function as a 150 W/ch stereo amplifier with 250 watts per channel of