Peavey 12 D manual Troubleshooting, Disconnecting AC Power to the Impulse 12D, HUM or Buzz

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The unit is normally shipped with the button in the line-level or “in” position. However, before each use it is a good idea to check for the proper position of the switch, as it could be toggled inadvertently during transport or set-up.

Due to the 30 dB of extra gain that this switch provides, DO NOT leave it in the “out” position for line-level input signal use! This could result in input-stage clipping of the Impulse® 12D and cause unnecessary distortion.

DISCONNECTING AC POWER TO THE IMPULSE® 12D

We recommend that the Power switch (3) be used to turn the unit off first, and then the AC power cord can be removed. This minimizes stress to the power amplifiers and the transducers from turn-off transients. The power switch has an arc suppression capacitor to help during turn-off and tends to make a clean disconnect from the AC power, while the power cord IEC connector can make intermittent contact before finally becoming fully disconnected, e.g., as when wiggling the cord.

TROUBLESHOOTING

No Output at All

First, make sure the unit has AC power and is turned ON. Make sure the various LED’s on the inputs of the power amp module are illuminated (11 and 12 will always be illuminated either red or green).

If not, make certain the ON/OFF switch (3) is in the ON position and check the IEC power cord connection (2) by ensuring it is fully engaged and seated. Make certain the AC line cord is plugged into a working AC outlet.

Finally, check the circuit breaker (1). (See the Rear Panel: circuit breaker section for safety instructions.)

Once assured your unit is getting AC power, check that the Impulse® 12D is getting a signal. Temporarily disconnect the cable running to its inputs and connect it to some other device capable of reproducing the signal (i.e., a power amp and speaker). If this produces a signal, make sure that all Gain controls being used have been turned up to a satisfactory level (one-third to halfway).

If the Impulse® 12D has been subjected to direct sunlight or excessive heat, the built-in thermal protection may have been triggered. If so, turn off the Impulse® 12D and let it cool for a sufficient amount of time.

If there is still no output, contact your authorized Peavey dealer or the Peavey International Service Center.

HUM OR BUZZ

If the Impulse® 12D is producing a hum or buzz, the problem could be AC outlet related. Try plugging the Impulse® 12D into a different AC outlet. If a different circuit (breaker) is used for the mixer and for the Impulse® 12D, it can sometimes cause hum problems. Unless it is not practical, it is best to use the same wall outlet (breaker) to supply power to both the mixer and the powered speaker.

Ensure that shielded cables have been used to route the signal to the Impulse® 12D's inputs. If speaker cables with 1/4” plugs are used as input cables instead of shielded cables, they will be prone to hum or buzz.

Hum may be ground loop related. It may be helpful to lift the shield ground on a balanced cable at the Impulse® 12D end by only using the ground lift switch (4). Check any input changes carefully by first turning down the gain control(s) (13,14) before plugging and unplugging cables, or lifting the shield ground at the speaker end by using the Ground Lift switch (4).

Check to make sure light dimmers are not on the same circuit as the Impulse® 12D, the mixer or any source devices. If light dimmers are used, it may be necessary to turn them full ON or full OFF to eliminate or reduce hum. This is a typical AC wiring/light dimmer interference problem, not a design flaw of the Impulse® 12D.

The third wire (ground plug) on the AC plug should NEVER be removed or broken off, as this is a potential safety hazard.

DISTORTED OR FUZZY SOUND

First, ensure the mixer (signal source) is not clipping or being over driven. Make sure the gain control(s) (13,14) on the Impulse® 12D have not been set too low. Check that the input plugs are fully seated in the input jacks

(7)and (8) on the rear panel of the Impulse® 12D. Ensure that the proper MIC/LINE switch setting is being used (5,6) for line-level signals, and that a power amp has not been plugged into one of the input jacks of

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Contents Impulse12 D Page Important Safety Instructions Impulse 12D DescriptionIEC Power Cord Connection ApplicationsCircuit Breaker ON-OFF Switch Access Panel for Optional Expansion ModuleGround Lift Switch Input 1 aFront Logo LED Switch MIC/LINE SWITCH, Present on Both Input 1 and Input 2 5,6Input 2 B GAIN, Present on Both Input 1 and Input 2 13Sleep Switch Bass ENHANCER/BYPASS SwitchLine OUT Section D E R a T I N G I N S T R U C T I O N S Flying the Impulse 12DConnecting AC Power to the Impulse 12D USE of the Impulse 12D with a Subwoofer Pole TunnelUSE of the Impulse 12D with a Speaker Stand Connecting a Signal to the Impulse 12D Gain Control AdjustmentMIC/LINE Switch Adjustment Troubleshooting Disconnecting AC Power to the Impulse 12DHUM or Buzz Distorted or Fuzzy SoundCare and Maintenance CleaningSUNLIGHT/HEAT TouchupArchitectural and Engineering Specifications Impulse 12D Bottom Mounting Locations TOP Mounting Locations Hookup Diagrams Peavey Electronics Corporation Limited Warranty Product Category DurationCustomer warranty registration
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12 D specifications

The Peavey 12 D is a versatile and powerful loudspeaker designed to meet the demands of live sound reinforcement and various audio applications. Known for its high performance and reliability, the 12 D is aimed at musicians, DJs, and sound engineers who require quality sound and durability in a portable package.

One of the key features of the Peavey 12 D is its impressive power handling capability. The loudspeaker can handle up to 300 watts of continuous power and peaks at 1200 watts, making it suitable for medium to large venues. This robust power handling allows the speaker to reproduce audio with clarity and impact, ensuring that every note and vocal cut through the mix.

The 12 D employs a 12-inch heavy-duty woofer that provides deep, resonant bass response, ideal for a range of music genres. This is complemented by a high-frequency driver that delivers crystal-clear treble frequencies, allowing for a balanced sound profile. The combination of these components results in a full-range sound that is both vibrant and articulate.

Incorporating advanced technologies, the Peavey 12 D features a constant directivity horn that offers controlled dispersion of sound. This ensures consistent coverage across the audience area, minimizing dead spots and providing an even listening experience. Additionally, the speaker is equipped with Peavey's proprietary EQ settings, allowing users to tailor the sound output to their specific environment or preferences.

Portability and ease of use are also central to the design of the Peavey 12 D. Weighing in at a manageable size and featuring durable enclosures, the speaker is easy to transport and set up. Integrated handles make it convenient for mobile applications, and its rugged construction ensures it can withstand the rigors of touring.

For connectivity, the Peavey 12 D offers versatile input options, allowing for seamless integration into existing sound systems. With all these characteristics combined, the Peavey 12 D stands out as a reliable and powerful choice for anyone looking to elevate their sound experience, whether on stage or at an event. Its combination of performance, technology, and user-friendly features makes it an excellent option for both professionals and enthusiasts alike.
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