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PRODUCT DESCRIPTION
The AMC650r and AMC680r in-wall loudspeakers deliver outstanding performance. They
incorporate a unique waveguide tweeter that has a large mounting area to extend its response.
This allows a lower crossover point which produces a more integrated sound. The painstakingly
developed shape and profile of this waveguide guarantees much smoother and wider response
than with post or “eye socket” mounted tweeters. In addition the tweeter is mounted on a 20-
degree angle which provides a natural “toe in” to focus the sound when the AMC650/680r are
used as front speakers. Alternatively the sound of the tweeters can be directed away from the
listening area, producing a more diffuse sound when used as surround speakers. Complex high-
order crossovers ensure seamless blending between woofer and tweeter and a perfectly
balanced sonic character. In production, Snell’s unique hand tuning of each
crossover gives an incredibly tight ±1dB match to the Master Reference. The AMC650r is
perfect for any application—main speakers, surround use, or background music.
3
/4-inch dome ferrofluid-cooled tweeter provides detailed, articulate sound and wide dispersion.
Waveguide tweeter mounting for smoother high frequency response.
Tweeter and waveguide are angled at 20 degrees for optimum coverage of the listening area.
Copolymer woofer with NBR rubber surround offers smooth, natural performance.
This Package Contains:
2 Model AMC650r or AMC680 loudspeakers
2 White metal grilles
2Paint masks
1 Hole-cutting template
Examine the contents of the package and confirm that you have all the items.
INTRODUCTION
Note: This manual is written with the assumption that the installer possesses skill in the proper
use of hand and power tools, a knowledge of local fire and building codes, and a familiarity
with the environment behind the surface of the wall or ceiling in which the speakers will be
installed.
Where to Place Your Speaker Systems
Effects of the Installation Location
The wall or ceiling into which the AMC650r or AMC680r is installed becomes its acoustical
enclosure. A large part of the system’s acoustical performance is dependent on that enclosure.
Generally, larger volumes will ensure full bass response. Whenever possible, avoid placing the
speakers at either end of a long column such as that created between wall studs, the footer,
and the header. Placement at the ends of such a tunnel will create a “closed-end tuned pipe”
that can adversely effect bass response. Hard surfaces behind the speaker installlation location
will cause reflections that also will adversely effect bass response. To avoid this loosly fill the
volume behind the speaker with fiberglass or other sound-absorptive material.
Be sure the area behind the speaker mounting location is large enough - 0.5 cu. ft. or more.
Avoid installing the speaker near the ends of the chamber behind the mounting that is
formed by 2x4 framing. (Typically at ceiling or floor).
Fill the chamber behind the speaker mounting location with acoustically absorbent material.