• Frequency Response : 20 Hz -0.3 dB – 120 kHz -3 dB
• THD+N = 0.01%, 1kHz, 1W to 10W, A Weighted.
• Input impedance: 22K ohm
• Input sensitivity = 252mV, 1W @ 8 Ohm; 2.57V, 100W @ 8 Ohm; 1.81V, 100W @ 4 Ohm
• Input sensitivity for maximum power : 3.33V
• Gain : 21 db
• SNR > 100 db at 100W
• 12V DC Trigger Input
• WBT binding post for spade and banana plug
• Chassis is made of high-grade anodized brushed aluminum to reduce audio resonance
• Dimension : 17″x 15″ x 2.95″
• Worldwide AC voltage (84VAC to 264VAC). No need for AC regulator if the AC voltage falls within the specified range.
• Weight : 16 pounds
• AC Fuse : Slow blow, 5A, 250VAC

NuForce’s Ref 18 elevates the already excellent performance characteristics of the Ref 9V3SE — most notably, liquidity and neutrality — to a degree that must be heard to be believed. As with the Ref 9V3SE, operation in a less than well resolved and transparent system may mask the Ref 18′s advantages. Conversely, a pair of Ref 18s in a fine, audiophile-grade system will reveal the following qualities:

• Sweeter, more natural highs.
• A near-palpable mid range and harmonic structure, resulting in a more natural and relaxed presentation.
• A beautifully textured low end exceeding even that of the Ref 9V3SE’s exemplary authority and control.
• A deeper, more coherent sound-stage.

In short, the answer to a discriminating audiophile’s prayers.