More Information about AmpandSound Nautilus
The Nautilus is one of our flagship Personal Audio Tubed Integrated Amplifier.
Many still love the sleek lower profile look of the Classic Nautilus and as such we allow you to order your Nautilus with the original metal work style.
The Nautilus brings the dual-mono layout onto a single chassis. We started with our most versatile circuit, the Mogwai, and went about creating two separate amps that share a single chassis. 2 Power Transformers, Separate Power Supplies, Chokes, and input transformers. The amps are built with separate turret boards, with the shared component being the input tube, volume control, and outputs. We were unconstrainted with parts selection and layout and chose the most robust power transformer and widest/least distortion output transformers we could find.
The Nautilus’ hand build nature and part selection necessitated a robust hand fabricated chassis. We partnered with our existing CNC metal fab house to build a 12 gauge steel chassis with bracing that could support the 44lbs of transformers without a hint of strain. In total, the Nautilus is 68lbs before packing. We additionally choose to cover all the transformers and business end of the amp with a gorgeous chrome cover.
Bench report with 12AX7 inputs with 5ARA4 recifiers and KT88's
Input sensitive: with 12AX7 input @ 1.4V P-P on SE input
Noise: @ 300ohm/HiZ 2.1mV RMS
Noise: @ 100ohm 1.5mV RMS
Noise: @ 32ohm 1.2mV RMS
Noise: @ 16ohm 1mV RMS
Noise: @ 8ohm LoZ 660uV RMS
Max Power @ 8ohm @ 8watts RMS with KT88s and 5AR4s
Max Power @ 32ohm@ 5watts RMS
Max Power @ 100ohm @ 6watts RMS
Max Power @ 300ohm @ 6watts RMS
Ultra-wide bandwidth; 10hz to 32khz @ 1 watt -1db
THD 1Watt @ 1.22%
THD 2Watt @ 1.84%
THD 3 Watt@ 2.45%
THD MAX @ 3.27%
Noise ACV=0.24mV
Compatible with nearly every headphone.
Power and Noise specs are dependent on tube selection.
Actual size is 14”deep, 18” wide and 8”tall. (70lbs)
Amp weighs in at 70lbs/100lbs shipped in a large Pelican style case.