Speaker Wiring Diagrams 4x12 Wiring

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Wiring a 4 X 12 Speaker cabinet

Wiring a 4 X 12 Speaker cabinet3/04 - Jens Moller http://www.colomar.com/Shavano/4x12wiring.html Note: For 2 speaker solutions see: Wiring a 2 X 12 Speaker cabinet

This Web page contains a lot of information that may be new to you. You may need to find someone who is knowledgeable about reading electronic schematics to help understand what some of this information is telling you.

Many people have asked how to wire up a 4 speaker Cabinet that can have an extension speaker cabinet (usually another 2 or 4 speaker Cabinet) plugged into it when desired. The most common request I get is for 4 speakers that are 12 inch in diameter (4 X 12), however, this solution pertains to 4 10's, 4 15's or any mix of sizes. Please try to make sure that each speaker is approximately the same SPL (see SPL Discussion for more information on this topic). In this set of wiring diagrams, all speakers in the same cabinet are the same impedance. Voice Coil Tweeters, if used, may not be the same impedance, it depends on how they are used. Piezos do not have impedance that affects the other speakers in the cabinet. For other speaker combinations, please see: Speaker Wiring/Loading Examples and under Speakers - Usage/ Wiring on the Construction Web Page.

Connector ChoicesMany people install both 1/4 inch phone jacks and Speakons on the same cabinet. This allows you plug your cabinet on no matter which is in use. 1/4 inch phone jacks cannot reliably support more than 500 watts of power. If your cabinet will be used at 500 watts or higher, use Speakon connectors instead. Which connector is right for you? Most Guitar and Keyboard amplifiers use 1/4 inch phone jacks for thier Speaker connections. Some higher powered Bass Guitar amplifiers will use Speakon connectors.

http://www.colomar.com/Shavano/4x12wiring.html (1 of 17) [8/4/2010 1:14:17 AM]

Wiring a 4 X 12 Speaker cabinet

Most Low to Mid power PA systems use 1/4 inch jacks and bananna plugs for thier Speaker connections, some occasionally include Speakons. Many high powered PA systems only provide Bananna connectors or Speakons

Internal WireIf your speakers will see 500 watts or less, use 18 or 16 gauge (AWG)wire. If your speakers will see 500 watts or above, use 16, 14 or 12 gauge (AWG) wire. Piezos and Voice-Coil tweeters do not use as much power since they are frequency limited. 20 or 18 gauge (AWG) wire is sufficent. NOTE: Wire is available a hardware stores and auto parts stores. Use stranded copper wire. Solder all internal connections to components.

Cabinet Wiring OptionsUsage Information

Wiring Diagram

Mono4 Musical Intrument Speakers. Hard wired for a single total impedance. Option 1 4 - 4 ohm speakers = 16 ohms

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Wiring a 4 X 12 Speaker cabinet

Mono4 Musical Intrument Speakers. Hard wired for a single total impedance. Option 1 4 - 16 ohm speakers = 4 ohms

Mono4 Musical Intrument Speakers. Hard wired for a single total impedance. Option 1 4 - 4 ohm speakers = 4 ohms Option 2 4 - 8 ohm speakers = 8 ohms Option 3 4 - 16 ohm speakers = 16 ohms

http://www.colomar.com/Shavano/4x12wiring.html (3 of 17) [8/4/2010 1:14:17 AM]

Wiring a 4 X 12 Speaker cabinet

Mono with Piezo Tweeter4 Musical Intrument Speakers and 1 Piezo. Hard wired for a single total impedance. Option 1 Note:The power rating of a Piezo should be at least 1/2 of power rating of the regular speakers. 4 - 4 ohm speakers = 16 ohms

Mono with Piezo Tweeter4 Musical Intrument Speakers and 1 Piezo. Hard wired for a single total impedance. Note:The power rating of a Piezo should be at least 1/2 of power rating of the regular speakers. Option 1 4 - 16 ohm speakers = 4 ohms

http://www.colomar.com/Shavano/4x12wiring.html (4 of 17) [8/4/2010 1:14:17 AM]

Wiring a 4 X 12 Speaker cabinet

Mono with Voice Coil Tweeter4 Musical Intrument Speakers and 1 Voice Coil Tweeter. Hard wired for a single total impedance. Note:The power rating of a voice coil tweeter should be at least 1/4 of power rating of the regular speakers. See First Order Cross-overs for other capacitor frequency ranges. Note:As long as the voice coil tweeter's cross-over is 2000 Hz or above, you do not need a Low Pass inductor for the Woofers. 4 - 4 ohm speakers = 16 ohms 1 - 16 ohm tweeter, 2.5 uf capacitor for 4000 Hz

Mono with Voice Coil Tweeter4 Musical Intrument Speakers and 1 Voice Coil Tweeter. Hard wired for a single total impedance. 4 - 16 ohm speakers = 4 ohms 1 - 4 ohm tweeter, 10 uf capacitor for 4000 Hz

Note:The power rating of a voice coil tweeter should be at least 1/4 of power rating of the regular speakers. See First Order Cross-overs for other capacitor frequency ranges. Note:As long as the voice coil tweeter's cross-over is 2000 Hz or above, you do not need a Low Pass inductor for the Woofers.

http://www.colomar.com/Shavano/4x12wiring.html (5 of 17) [8/4/2010 1:14:17 AM]

Wiring a 4 X 12 Speaker cabinet

Mono with Piezo Tweeter4 Musical Intrument Speakers and 1 Piezo. Hard wired for a single total impedance Option 1 4 - 4 ohm speakers = 4 ohms Option 2 Note:The power rating of a Piezo should be at least 1/2 of power rating of the regular speakers. 4 - 8 ohm speakers = 8 ohms Option 3 4 - 16 ohm speakers = 16 ohms

Mono with Voice Coil Tweeter4 Musical Intrument Speakers and 1 Voice Coil Tweeter. Hard wired for a single total impedance. Option 1

http://www.colomar.com/Shavano/4x12wiring.html (6 of 17) [8/4/2010 1:14:17 AM]

Wiring a 4 X 12 Speaker cabinet

4 - 4 ohm speakers = 4 ohms 1 - 4 ohm tweeter, 10 uf capacitor for 4000 Hz Option 2 4 - 8 ohm speakers = 8 ohms 1 - 8 ohm tweeter, 5 uf capacitor for 4000 Hz Option 3 4 - 16 ohm speakers = 16 ohms 1 - 16 ohm tweeter, 2.5 uf capacitor for 4000 Hz

Note:The power rating of a voice coil tweeter should be at least 1/4 of power rating of the regular speakers. See First Order Cross-overs for other capacitor frequency ranges. Note:As long as the voice coil tweeter's cross-over is 2000 Hz or above, you do not need a Low Pass inductor for the Woofers.

Mono, Switchable Impedance4 Musical Intrument Speakers. Impedance selectable between 4 and 16 ohms by using a switch.http://www.colomar.com/Shavano/4x12wiring.html (7 of 17) [8/4/2010 1:14:17 AM]

Wiring a 4 X 12 Speaker cabinet

4 - 16 ohm speakers = 4 or 16 ohms depending on which way the switch is set No other impedance speaker is reccomended for this configuration. WARNING: Do not flip the switch while the power amp is powered up

Mouser Electronics Sells 1/4 inch phone jacks that have a built in DPDT switch. Marshall used this type of Jack/Switch to automatically set the speaker selection mode. They are expensive and prone to failure over time, however, using them often simplifies set-up of your rig. If you decide to use these, it is reccomended that you use a seperate Jack for each impedance and that the switch function depends on which jack you plug into.

Mono, Switchable Impedance with Piezo4 Musical Intrument Speakers. Impedance selectable between 4http://www.colomar.com/Shavano/4x12wiring.html (8 of 17) [8/4/2010 1:14:17 AM]

Wiring a 4 X 12 Speaker cabinet

and 16 ohms by using a switch. 4 - 16 ohm speakers = 4 or 16 ohms depending on which way the switch is set No other impedance speaker is reccomended for this configuration. Mouser ElectronicsSells 1/4 inch phone jacks that have a built in DPDT switch. Marshall used this type of Jack/Switch to automatically set the speaker selection mode. They are expensive and prone to failure over time, however, using them often simplifies set-up of your rig. If you decide to use these, it is reccomended that you use a seperate Jack for each impedance and that the switch function depends on which jack you plug into. A Piezo is not dependant on impedance in the ranges that we are operating at. Because of this, as single Piezo can be used for both impedance settings. Note:The power rating of a Piezo should be at least 1/2 of power rating of the regular speakers. WARNING: Do not flip the switch while the power amp is powered up

Mono, Switchable Impedance with 2 Voice Coil Tweeters4 Musicalhttp://www.colomar.com/Shavano/4x12wiring.html (9 of 17) [8/4/2010 1:14:17 AM]

Wiring a 4 X 12 Speaker cabinet

Intrument Speakers. Impedance selectable between 4 and 16 ohms by using a switch. 4 - 16 ohm speakers = 4 or 16 ohms depending on which way the switch is set 2 - 8 ohm tweeters, 5 uf capacitor for 4000 Hz No other impedance speaker is reccomended for this configuration. WARNING: Do not flip the switch while the power amp is powered up

Mouser ElectronicsSells 1/4 inch phone jacks that have a built in DPDT switch. Marshall used this type of Jack/Switch to automatically set the speaker selection mode. They are expensive and prone to failure over time, however, using them often simplifies set-up of your rig. If you decide to use these, it is reccomended that you use a seperate Jack for each impedance and that the switch function depends on which jack you plug into. Note:The power rating of a voice coil tweeter should be at least 1/4 of power rating of the regular speakers. See First Order Cross-overs for other capacitor frequency ranges. Note:As long as the voice coil tweeter's cross-over is 2000 Hz or above, you do not need a Low Pass inductor for the Woofers. NOTE:You must use a seperate Voice Coil tweeter per Woofer - the Cross-Over capacitor is based on impedance, you cannot switch load impedance without using a different capacitor (the cross-over frequency will move) - If run individually, switching impedances will not alter the cross-over frequency.

http://www.colomar.com/Shavano/4x12