Sonance VC30RIM instruction manual I N S T R U C T I O N M A N U A L, V C 3 0 R I M

Sonance • 212 Avenida Fabricante • San Clemente, CA 92672-7531, USA

(800)582-7777 or (949) 492-7777 • FAX: (949) 361-5151 Technical Support: (800) 582-0772

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©2005 Dana Innovations. All rights reserved. Sonance is a trademark of Dana Innovations.

Decora is a registered trademark of Leviton Manufacturing Co., Inc.

33-1541 11/05

V C 3 0 R I M

I M P E D A N C E

M U L T I P L Y I N G

VOLUME CONTROL

I N S T RU C T I O N M A N U A L

INTRODUCTION

The VC30RIM is an impedance-multiplying stereo volume control that features 12 control positions, soft-touch action and silent switching capability. The VC30RIM incorporates a rotary control and can be safely used with amplifiers that deliver up to 30 watts RMS per channel.

When properly implemented, the Sonance VC30RIM allows the safe use of multiple pairs of speakers with amplifiers not specifically-designed to run the low-impedance loads presented by multiple speakers. Adjustable impedance jumpers allow as many as 8 pairs of 8-ohm speakers (or 4 pairs of 4-ohm speakers) to be driven by a single 8-ohm capable amplifier.

APPLICATIONS

The VC30RIM is designed to have a single pair of speakers connected to a single volume control. Its impedance-multiplying feature allows multiple volume control/speaker sets to be safely used with a single amplifier. The included adjustable impedance jumpers can be set to accommodate different total numbers of speaker/volume control sets.

Important Note: This volume control is intended for use primarily in background music systems. The impedance jumpers increase the impedance seen by the amplifier, which reduces the amount of power reaching each pair of speakers, reducing the speaker’s overall output capability. The more speakers being driven by a single amplifier through VC30RIM controls, the higher the impedance jumpers must be set and the lower the amount of power that will reach each speaker. Operating multiple sets of speakers through VC30RIM controls with jumpers set lower than recommended in order to increase the system’s output capability can severely damage the amplifier.

If the system will include a pair of speakers intended for dedicated higher-volume music listening, we strongly recommend that those speakers be powered directly by a dedicated amplifier through a VC30R or VC60R standard volume control.

CONNECTIONS

WARNING: Turn the amplifier’s power OFF until you have completed all of the connections and have determined that they are correct. (If the amp’s AC plug is accessible we recommend that you unplug it from the wall outlet to avoid acci- dental turn-on and possible damage to the amplifier or speakers.)

The VC30RIM has removable 4-pin screw connectors that simplify connecting the speakers and amplifier.

1.Bring the wires from the speakers and amp through a backless J-box.

2.Insert the speaker wires as shown into the holes in the 4-pin screw connec- tors. Make sure to insert the ‘+’ and ‘–’ leads into the correct holes (see illustration, below).

Important: Make sure there are no FROM AMPLIFIER			T O S P E A K E R S
stray wires that can touch each
other. Touching wires can cause a
short-circuit that can damage the
amplifier.		I N P U T		O U T P U T
Note: The connectors can accommo-	R+ R– L– L+			L+ L– R– R+
date wire as large as 14 gauge.

3. Using a small flat-blade screw- driver, tighten the screws to secure the wires in the connector.

4. Press the 4-pin screw connectors into the corresponding speaker terminals on the volume control until they lock into place.

I N S T R U C T I O N M A N U A L

V C 3 0 R I M I M P E D A N C E - M U L T I P L Y I N G

V O L U M E C O N T R O L

IMPORTANT: Do not reverse the “Input” and “Output” connectors or the volume control will not operate properly.

5.Connect only 1 pair of speakers to each volume control. Connect multiple volume controls to the amplifier’s speaker terminals in parallel (see illustration, below).

Amplifier/Receiver

SPEAKER OUTPUT

+ L – – R+

L+	–L –R	R+			L+	–L –R	R+
	T U P N I					T U P N I
	AMPLIFIER		VC30RIM	®		AMPLIFIER		VC30RIM	®
	VC30RIM		30W rms MAX Input/Ch			VC30RIM		30W rms MAX Input/Ch
			Two-8Ω Speakers					Two-8Ω Speakers
	SPEAKERS					SPEAKERS
O U T P U T					O U T P U T
R+	R– L–	L+			R+	R– L–	L+

Left	Right	Left	Right
Speaker	Speaker	Speaker	Speaker

MOUNTING

IMPORTANT: Do NOT install the volume control in the same electrical box as AC house wiring, a light switch or any other high-voltage device or control. The volume control can share gang boxes with other low-voltage controls such as A/B speaker switches, infrared receivers, and line-level audio or video devices if these other devices are rated as Class 2 devices according to the National Electrical Code.

Use the included hardware to mount the volume control in a single or double J-box as shown below. (Do not over-tighten the screws.) Attach your choice of the included Decora® or standard hardware.

Note: If you are installing the volume control into a typical plastic J-box you will have to remove the J-box’s back panel to accommodate the control.

Volume	Decora	Standard
Control	Hardware	Hardware

Backless

J-Box

4 1