NHT 1.5 - Manual (Page 2)

Thank you for your purchase of the NHT Model 1.5, our finest two-way loudspeaker. Please take a few minutes to read
through this Owner's Manual prior to installing your new speakers. The information provided will help you to obtain
maximum performance from your audio system. If you have questions or need assistance at any time during the installa-
tion or operation of your new speakers, please call your NHT Dealer or our Toll-Free Customer Hotline at:
1-800-NHT-9993
Please retain the Model 1.5’s packaging to protect the speakers in the event that you move or transport them.
„ „ Design
NHT loudspeakers are designed to deliver refined, musical sound from attractive and affordable packages. Our efforts are
guided by the study of human hearing and are optimized for real-world use. Every NHT speaker undergoes rigorous
testing and quality control at the factory to ensure you years of listening pleasure.
Incorporating NHT’s proprietary Focused Image Geometry design, the Model 1.5’s custom-designed drivers and enclosure
achieve a level of tonal neutrality and imaging precision unsurpassed at the price. Focused Image Geometry determines
the 21-degree angle which defines the 1.5's unique cabinet, as well as the sound radiation pattern of the system. The
irregular enclosure shape greatly increases the ratio of direct to reverberant sound, reducing side-wall reflections and
concentrating sound energy in the listening area. The exact angles at which the sound from the speakers reaches the ears
of centrally located listeners is calculated to create what is known in acoustics as minimum “inter-aural cross-correlation."
This technique allows the Model 1.5 to properly recreate the natural acoustic ambiance and perspective contained in good
recordings. In addition, the radiating axes of the left and right speakers are crossed, providing “time-intensity trading,” so
that the stereo image remains focused and stabilized for a wider range of listening positions. Finally, the cabinet shape
also reduces the formation of internal standing waves, resulting in smoother midrange response.
Focused Image Geometry is the heart of NHT’s successful line of high-performance audiophile loudspeakers. Borrowing
technologies from NHT’s acclaimed flagship Model 3.3, the Model 1.5 employs custom-designed European drivers, includ-
ing an offset aluminum dome tweeter that boasts extremely smooth response, even at high listening levels. The Model 1.5
features a 6.5” long-throw woofer that is the result of extensive in-house development and is custom-manufactured for
precise rolloff and radiation characteristics.
With the increasing popularity of home theater systems, many audio / video enthusiasts are building combined entertain-
ment systems for both music and movies. When the Model 1.5 is used in a home theater system, be sure to augment it
with timbre-matched speakers to ensure a seamless soundfield. The NHT AudioCenter-1 is the appropriate matching
center channel speaker, and a second pair of Model 1.5’s is the ideal match for the surround channels. Alternately, the
NHT HDP-2 hybrid dipole can be used as a surround speaker in rooms where the couch is against the rear wall.
Model 1.5 Specifications
· System Type: 2-way, 10-liter acoustic suspension design, Focused Image Geometry
· Driver Complement: 6.5” long-throw polypropylene woofer, 1” fluid-cooled aluminum dome tweeter
· Crossover: 3.3KHz, 12dB/octave high-pass and low-pass
· Response: 53Hz - 25KHz, +/- 3dB
· Sensitivity: 85db (2.83V at 1M)
· Impedance: 8 ohms nominal, 6.2 ohms minimum
· Recommended Amplifier Power: 20W/ch minimum, 150W/ch maximum
· Inputs: 5-way binding posts
· Weight: 16 lbs. each
· Dimensions: 16.5"H x 7"W x 10.25"D
· Finish: High gloss black, mahogany or sycamore laminate
Specifications are subject to change without notice, in accordance with our policy of continuously upgrading the performance of our products.
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