Speciﬁcations, Introduction | Boston Acoustics 351 361 381 specification

Speciﬁcations	351	361	381

Frequency Response (±3dB)	65–20,000Hz	57–20,000Hz	48–20,000Hz

Recommended Ampliﬁer Power	10–100 watts	10–125 watts	10–150 watts

Nominal Impedance	8 ohms	8 ohms	8 ohms

Sensitivity [1 watt (2.83v) at 1m]	90dB	89dB	89dB

Tweeter	Kortec 1" (25mm)	Kortec 1" (25mm)	Kortec 1" (25mm)
	soft dome	soft dome	soft dome

Bass Unit	51⁄4" (135mm) copolymer	61⁄2" (165mm) copolymer	8" (200mm) DCD copolymer

Crossover Frequency	3500Hz	3400Hz	3200Hz

External Dimensions (HxW)	91⁄2 x 63⁄4" (241 x 171mm)	109⁄16 x 73⁄4" (268 x 197mm)	123⁄8 x 99⁄16" (315 x 243mm)

Mounting Hole Cutout (HxW)	83⁄4 x 53⁄4" (223 x 146mm)	97⁄8 x 71⁄8" (251 x 181mm)	113⁄4 x 81⁄2" (298 x 216mm)

Mounting Depth (from surface)	25⁄8" (67mm)	27⁄8" (73mm)	31⁄4" (83mm)

Introduction

The Designer Series in-wall speakers are designed to be as accurate, clean and musical as our free- standing speakers. The unobtrusive, ﬂush-mount design makes them ideal for installation in walls or ceilings of rooms where space or decor make conventional speakers undesirable or inappropri- ate. They can also be used for front and/or rear channels in a home theater system.

The front surface has a matte white ﬁnish. The speaker can be installed as is, or can be painted to match the room environment by using the supplied painting mask. The epoxy-painted, galvanized steel speaker grille is removable.

The speakers are constructed of rugged materials suitable for use in a variety of environments, indoors or out. Offering complete placement ﬂexibility, all exposed components are moisture-, rust-, and temperature-resistant for worry-free installation in the bath, kitchen or on the patio.

Their smooth, detailed sound comes from two highly reﬁned driver elements: a powerful, long- excursion copolymer bass unit and our 1-inch (25mm) Kortec™ soft dome tweeter. The silk-like fabric dome delivers a remarkably accurate response for outstanding clarity and articulation. The tweeter and bass unit are mounted close together in a point-source conﬁguration for excellent imaging and extremely broad, uniform dispersion. This is important, because wide dispersion gives you the ﬂexibility to install the speakers where they look the best (high on the walls, for example), yet still project a smooth, natural sound throughout the listening area.

In combination, these advanced engineering technologies and Boston’s state-of-the-art manufac- turing facilities give the Designer Series a level of performance unmatched by other in-wall speakers.