Legrand Impedance Matching Volume Control, IS-0293 Installation Instruction

INSTRUCTION/INSTALLATION SHEET

SPEAKER LEVEL / IMPEDANCE MATCHING VOLUME CONTROL IS-0293 REV.O

1. Introduction

The On-Q Home Speaker Level / Impedance Matching Volume Controls,

P/N 364769-xx (see Figure 1), are meant to be used in a multiple speaker distributed sound system. These volume controls enable more pairs of speakers to be connected to an amplifier than the amplifier could normally accommodate

(due to impedance matching ability). The impedance matching volume controls mate perfectly with parallel audio distribution devices such as the On-Q Home 6

Room Audio Module, P/N 364454-01, and the HECC 7.1, 6 Room Audio,

P/N 364676-xx. This volume control also has a non-impedance matching (speaker level), (1x) option to accommodate a single pair of speakers. When used in this fashion better fidelity will be achieved with the single pair of speakers.

On-Q Home Speaker Level /

Impedance Matching Volume Control

P/N 364769-01 White

P/N 364769-02 Almond

P/N 364769-03 Ivory

2. Description

The On-Q Home Speaker Level / Impedance Matching Volume Controls occupy a single gang of an electrical box and are offered in white, almond, and ivory in an attractive decorator style. They have wiring blocks that disconnect for easy wiring and offer impedance matching selection via jumpers labeled 2x, 4x, and 8x, (1x=non-impedance matching), located on the circuit board. It is recommended that they be installed in a mud ring such as the On-Q Home Single Gang New Construction Mud Ring, P/N 364524-01, or an electrical box that is 20 cubic inches or greater. On-Q Home also offers dual gang and retro fit mud rings, P/N 364524-xx, 364525-xx.

3. Installation

Installation of the On-Q Home Speaker Level / Impedance Matching Volume Control,is best accomplished at multiple times during new construction, at “Rough-in” before the drywall is installed, and at “Trim-out” after the drywall is installed and painted.

Figure 1

Figure 2

Note: It is recommended that a minimum of 16 gauge 4 conductor wire be run for most applications from the distribution, such as the On-Q Home 6 Room Audio Module, to the volume control. Different gauge wire can, and should, be used based upon the distance of the intended run or quality of installation (see Figure 2) . It is recommended that wire gauge not be less than 18 gauge. The impedance matching volume controls can accommodate up to 14 gauge wire.

1. Run x/4 conductor (x=gauge preference) stranded speaker wire from the distribution area to the volume control. Run a minimum of 18 gauge 2 conductor wire from the volume control to the speakers, see Figure 2 for help in determining what gauge speaker wire should be used for your installation.

B. “Trim-out” steps:

Figure 3

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301 Fulling Mill Road, Suite G ©Copyright 2004 by OnQ Technologies, Inc All Rights Reserved.

Middletown, PA 17057 www.onqhome.com

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INSTRUCTION/INSTALLATION SHEET

SPEAKER LEVEL / IMPEDANCE MATCHING VOLUME CONTROL IS-0293 REV.O

1. Strip 3/16ths of an inch from all conductors (feed from distribution and runs to speakers) and insert into the wiring block (see Figure 3) of the volume control.

Tighten screws onto wire and give them a tug to insure there properly fastened.

NOTE: BE SURE NOT TO REVERSE THE AMPLIFIER OR SPEAKER CONNECTIONS OR DAMAGE

TO THE AMPLIFIER COULD RESULT!

2. Install the volume control into the mud ring/electrical box.

3. Determine how many pairs of speakers will be powered to the same amplifier (parallel), (See Figure 4).

This will be listed in the specification of the amplifier. It yields how "low" of a load the amplifier can safely run before damage or over heating occurs.

NOTE: Impedance varies with frequency, so in actuality, no load is seen as a stable (8, 4 or 2 ohms), it varies as frequency varies.

(This is why some of the higher selections were made in the Multiplier chart.), see Figure 5.

5. After load capacity is determined, refer to

Figure 5 to determine the proper multiplier setting for all the volume controls.

NOTE:

This chart refers to 8 ohm speakers. If the Speakers being used are some other impedance, you must calculate the parallel impedance and multiply it by the appropriate multiplier (x2, x4 or x8), see Figure 6, to match the load to the amplifiers capabilities. Nonimpedance matching=x1.

Figure 4

Figure 6

Innovations in Home Living.

301 Fulling Mill Road, Suite G ©Copyright 2004 by OnQ Technologies, Inc All Rights Reserved.

Middletown, PA 17057 www.onqhome.com

(800)-321-2343

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INSTRUCTION/INSTALLATION SHEET

SPEAKER LEVEL / IMPEDANCE MATCHING VOLUME CONTROL IS-0293 REV.O

Use this formula to determine impedance: Two 8 ohm speakers in parallel equal 4 ohms.

x-1 NOTE: The is a key on a scientific calculator which stands for reciprocal.

8 ohms

8 ohms x-1 + 8 ohms x-1 x-1 + 8 ohms x-1

= .25

+ 8 ohms x-1 + 8 ohms x-1

Then .25

= .50

Then .50

x-1 x-1 = 4 ohms

= 2 ohms

Figure 5

4 ohms x 2 (multiplier setting

2 ohms x 4 (multiplier setting

2

3

) = 8 ohms

) = 8 ohms

6. Position the jumper plug on the two pins relating to the appropriate multiplier setting (1x, 2x, 4x, or 8x).

(See Figure 7).

NOTE: Rotating the volume control fully counter clockwise will yield no power going to the speakers (off).

On-Q Home offers a variety of In-Ceiling, In-Wall, and Outdoor

speakers and Sub-Woofers.

Blue Line Series Speakers

6.5" In-Ceiling Speaker (pair)

8" In-Ceiling Speaker (pair)

6.5" In-Wall Speaker (pair)

8" In Wall Speaker (pair)

6.5" Dual Voice Coil In-Ceiling Speaker (ea.)

Outdoor Speakers, white/black (pair)

Home Theater (Blue Line) Series Speakers

6.5" In-Ceiling Speaker (ea.)

8" In-Ceiling Speaker (ea.)

OnQ Part Number

364654-02

364655-02

364656-02

364657-02

364658-01

364659-02/04

OnQ Part Number

364660-01

364661-01

6.5" In-Wall Speaker (ea.)

8" In Wall Speaker (ea.)

10" 150W Subwoofer (ea.)

364662-01

364663-01

364664-01

Gold Line Series Speakers

6.5" In-Ceiling Speaker (ea.)

8" In-Ceiling Speaker (ea.)

6.5" In-Wall Speaker (ea.)

8" In Wall Speaker (ea.)

6.5" Dual Voice Coil In-Ceiling Speaker (ea.)

Outdoor Speakers, white/black (ea.)

12" 200W Subwoofer (ea.)

Pre-Construction Brackets

6.5" In-Ceiling Pre-Construction Bracket Kit

8" In-Ceiling Pre-Construction Bracket Kit

6.5" In-Wall Pre-Construction Bracket Kit

6.5" In-Wall Pre-Construction Bracket Kit

Replacement Grills

6.5" In-Ceiling Speaker

8" In-Ceiling Speaker

6.5" In-Wall Speaker

8" In Wall Speaker

OnQ Part Number

364665-01

364666-01

364667-01

364668-01

364669-01

364670-02/04

364671-01

OnQ Part Number

364672-02

364673-02

364674-02

364675-02

OnQ Part Number

364690-01

364691-01

364692-01

364693-01

Figure 7

Innovations in Home Living.

301 Fulling Mill Road, Suite G ©Copyright 2004 by OnQ Technologies, Inc All Rights Reserved.

Middletown, PA 17057 www.onqhome.com

(800)-321-2343

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