Sima Products SSW-6, SSW-4 user manual Calculating Impedance, Selected

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Refer to your amplifier or receiver’s user manual or on the rear panel of the amplifier to determine the minimal speaker impedance that your amplifier can handle.

If your amplifier can handle 4 ohm loads

 

4 ohm

6 ohm

8 ohm

 

16 ohm

 

speakers

speakers

speakers

 

speakers

1 selected

Protection OFF

Protection OFF

Protection OFF

 

Protection OFF

2 selected

Protection ON

Protection ON

Protection OFF

 

Protection OFF

3 selected

Protection ON

Protection ON

Protection ON

 

Protection OFF

4 selected

Protection ON

Protection ON

Protection ON

 

Protection OFF

5 selected

Protection ON

Protection ON

Protection ON

 

Protection ON

6 selected

Protection ON

Protection ON

Protection ON

 

Protection ON

If your amplifier can handle 2 ohm loads

 

 

 

 

4 ohm

6 ohm

8 ohm

 

16 ohm

 

speakers

speakers

speakers

 

speakers

1 selected

Protection OFF

Protection OFF

Protection OFF

 

Protection OFF

2 selected

Protection OFF

Protection OFF

Protection OFF

 

Protection OFF

3 selected

Protection ON

Protection OFF

Protection OFF

 

Protection OFF

4 selected

Protection ON

Protection ON

Protection OFF

 

Protection OFF

5 selected

Protection ON

Protection ON

Protection ON

 

Protection OFF

6 selected

Protection ON

Protection ON

Protection ON

 

Protection OFF

 

 

 

 

 

 

Calculating Impedance

If you want to calculate the impedance of speakers with different impedance here is how to do it.

Parallel Impedance is equal to (R1 x R2) / (R1 + R2).

Say you had a 6 ohm and an 8 ohm speaker. The parallel impedance if you selected these two speakers would be:

(6 x 8) / (6+ 8) =48 / 14 = 3.4 ohms.

If the calculated impedance is less than the minimal amplifier allowed impedance, turn the PROTECTION mode on.

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Contents Speaker Selectors Table of Contents Rear Panel IntroductionFront Panel Connection from amplifier Speaker Connections ConnectInstallation Tips InstallationTypical Hook up Initial connection Protection Circuit When to use the protection switchOperation InputsCalculating Impedance Trouble Shooting Technical SpecificationsLimited Warranty Limited Warranty

SSW-4, SSW-6 specifications

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