Rated conservatively at 200W per channel (8 ohms) and well over 320W dynamic power (8 ohms; all channels driven), the result is breath-taking, lifelike surround sound performance, be it from the latest action-packed film with tremendous dynamics or a subtle classical piece with delicate and detailed passages. The M28 can accept both balanced and single-ended inputs, and features high-quality binding posts for speaker connection. The compact dimensions of this highly energy-efficient design belie the massive amount of power available for the most demanding music and movies.

NAD M28 Power Amplifier User's Manual

Specifications

FTC Power, Two Channels:

≥ 220 W (ref. rated THD, 8 Ohms , 20 Hz – 20 kHz, two channels driven)
≥ 400 W (ref. rated THD, 4 Ohms , 20 Hz – 20 kHz, two channels driven)

Rated Power, All Channels:

≥ 200 W (ref. rated THD, 8 Ohms , 20 Hz – 20 kHz, all channels driven)
≥ 340 W (ref. rated THD, 4 Ohms , 20 Hz – 20 kHz, all channels driven)

Rated THD (250 mW to rated power, CCIF IMD, DIM 100)

≤0.003 % (ref. 20 Hz – 20 kHz)

IHF Dynamic Power:

280 W 8 Ohms, (all channels driven)
560 W 4 Ohms, (one channel driven)

Damping Factor:

1.3 V (ref. rated power)

Input impedance
Input Impedance (r and c)

47 kΩ (Balanced)
23 kΩ (Single-ended)

>118dB (ref. rated power)

Damping Factor:

>750dB (ref. 8 Ohms, 50Hz and 1kHz)

Frequency Response:

±0.1dB (ref. 20Hz-20kHz)

-2.5dB at 3Hz and 100kHz

Input Impedance:

47 kilohm (Balanced)

Signal/Noise Ratio:

> 102dB (A-weighted ref. 1W, Balanced)
> 97 dB (A-weighted ref. 1W, Single-ended)
> 124 dB (A-weighted ref. rated power, Balanced)
> 120 dB (A-weighted ref. rated power, Single-ended)

Frequency Response:

± 0.1 dB (ref. 20 Hz – 20 kHz)
– 3 dB at 3 Hz to 60 kHz

Standby Time: 30 minutes

Standby Power: ≤ 0.5W

Dimensions & Weight:

Gross Dimensions WxHxD

435 x 156 x 380 mm (173/16 x 63/16 x 15”)

Shipping Weight: 46.7 lbs

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