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HD Amplifier





250 W RMS per channel into 8 Ω


30 W pure class A


1000 W RMS on lower impedance


1 V or 2 V RMS


0 Hz to 120 KHz +0/-0.5 dB

S/N Ratio

110 dB ASA A weighted, THD+N < 0.03%


XLR balanced/RCA unbalanced

Input impedance

88 KΩ balanced input 44 kΩ unbalanced input

DC filter

Toggle switch cuts DC of incoming signals


Overheating > +70° C (158° F)

Remote in and out

1/8 in jacks in and out trigger

Power In

IEC C19 20A Plug


1200 W max less than 1 W in standby/Auto mode


56 Kg (123.4 lb) each unit


Width 9.3 x 25.3 x 21.3 inches

Operating range

110-132 V 60 Hz

About our Amplifiers

Selecting the right amplifier based soley on specifications will most likely lead to disappointment. Of course, product specifications are critical as they provide a measurement baseline for each amplifier. But specifications cannot tell you what it sounds like because every brand has a distinct personality and unique sound. You see, amplifiers are *voiced* by the builder to acheive a tonal sound they believe best represents music. Your idea of great sound may not agree with that of a builder. No matter what the specifications say or how expensive it is, you will be disappointed with the amplifier. Some designers lean heavily on textured harmonics and some want their amplifier to be fast and dynamic. So, when selecting an amplifier, listen first and study specifications later. It makes the process both easier and more enjoyable. We have evaluated many brands and selected those that we believe represent the "best in class" for each pricepoint. Each has a distinct personality and we believe bring you closer to the music and listening enjoyment.


Started in 1951 by Stefan Kudelski, Nagra is a world leader in audio reproduction for both the film and music industry. Using its extensive experience and highly trained engineers, Nagra set out to create home audio products that convey the same quality and performance as their commercial recording equiipment. When purchasing Nagra equipment, you receive much more than audio equipment, you get unmatched build and sound quality. Selective audiophiles choose Nagra because of its beauty, performance and the close relationship they enjoy with the manufactuer.

Contact Us

Our Location

Minneapolis, Minnesota

Phone Number