Peavey PV Series manual Bridge Mode, Ddt

Page 9

high-power operating levels occur. Then, as temperatures in the amplifier heat sinks increase, the automatic thermal-sensing circuitry will cause high-speed operation to occur. Depending upon signal conditions and amp loading, high-speed fan operation may continue or the fan may cycle continuously between high and low. This situation is quite normal. If cooling is inadequate, however, the amplifier thermal-sensing system may cause temporary shut down of the unit, indicated by the PWR LEDs on both channels going dark. Inadequate cooling may be due to preheated air, reduced air flow resulting from blockage of inlet/outlet ports, severe amplifier overload, or short circuit conditions. Depending upon the available cooling air, operation should be restored relatively quickly, and the power LEDs on both channels will again be illuminated. In any event, action should be taken to correct the cause of the thermal shutdown. If the amplifier is not severely overloaded or shorted and air flow is normal in and out of the amplifier, then steps should be taken to provide a cooler environment for all the amplifiers. As a general rule, the cooler electronic equipment is operated, the longer its useful service life.

In most low to medium-power applications, the amplifier can be mounted in any configuration. It is desirable that, if at all possible, the power amplifier be located at the top of an equipment stack. This will prevent possible overheating of sensitive equipment by the hot air rising from the power amplifier. As a general rule, most home and studio requirements will never cause high-speed fan operation. High-speed operation may indicate that you have not taken the necessary steps to provide adequate cooling. Fully closed up in a cabinet, a PV® Series power amplifier will have severe cooling problems, even at low power levels.

BRIDGE MODE

The Bridge mode on stereo amplifiers is often misunderstood relating to actual operation and usage. In basic terms, when a 2-channel amplifier is operated in the Bridge mode, it is converted into a single-channel unit with a power rating equal to the sum of the power rating for each channel, at a load of twice that of the single-channel rating. For example, the PV 1500 is rated at 750 Watts RMS per channel into 2 Ohms. The Bridge rating is 1500 Watts RMS into 4 Ohms (minimum load). Bridge mode operation is accomplished by placing the MODE switch in the BRIDGE position, using only the BRIDGE Speakon® connector or the red binding posts for the output, and using the CHANNEL A input. All CHANNEL B input functions are defeated and serve no purpose now. Bridge mode operation can be used to drive sound distribution systems in very large public address applications. Another common use for the Bridge mode is in subwoofer applications where very high power levels are required to reproduce extremely low frequencies with adequate headroom. Such enclosures usually contain 2 or 4 loudspeakers to handle the power levels involved. For Bridge mode usage, the enclosure impedance must be 4 or 8 Ohms — never below 4 Ohms.

DDT™

Peavey’s patented DDT (Distortion Detection Technique) compression circuit enables the sound technician to maximize the performance of the amplifier/speaker combination by preventing the power amplifier from running out of headroom (clipping). This compression system is activated by a unique circuit that senses signal conditions that might overload the amplifier and activates compression (reduces the channel gain) when clipping is imminent. The threshold of compression is clipping itself, and no specific threshold control is used. This technique effectively utilizes every precious watt available for the power amplifier to reproduce the signal, while at the same time minimizing clipping and distortion. DDT significantly reduces the potential of loudspeaker degradation and damage, and is the most effective, automatic, hands-off approach to the problem of power amplifier clipping.

Since PV series power amplifiers use a circuit breaker for overcurrent protection, the DDT compression system plays an even more important role in continuous performance by preventing each channel from clipping and overload. Continuous operation at clipping can cause the circuit breaker to trip, but with the DDT activated, this problem is minimized. For this reason, the DDT compression system should always be enabled.

9

Page 8 Page 10
Image 9
Page 8 Page 10
Contents S E R I E S a M P S Page Important Safety Instructions Installation PV Series Professional Stereo Power AmplifierBasic Setup IntroductionPower Leds PWR Front Panel FeaturesSignal Activity Leds SIG Power SwitchBack Panel Features IEC Mains Connector Domestic AC Mains CordBinding Post Outputs DDT Distortion Detection Technique Switch Mode SwitchCombo Input Connector Speakon OutputsCrossover Switch 150 Hz Xover LOW CUT SwitchIndustrial and Commercial Installations THRU/LOW OUT JacksDDT Bridge ModeAmplifier Configurations Stereo BI-AMPED System Input Sensitivity & Impedance SpecificationsAmplificateurs Proffessionnels Stereo PV Series IDEBALLAGEMise EN Route Rapide Panneau Avant Leds DE Signal SIGLeds D’ALIMENTATIONPWR Leds DDTPanneau Arriere Connecteur IEC Selecteur DE ModeNe jamais déconnecter la connexion de terre de votre unité BornierOuverture DE Ventilation Selecteur DDT Distortion Detection TechniqueBloc DE Connexions D’ENTREES Entree ComboInstallations Industrielles ET Commerciales Sorties Jacks THRU/LOWSorties Jacks High OUT Mode Pont Bridge Stereo mode, below rated output power, 4 ohms Introducción Serie DE Amplificadores Profesionales Estéreo PVDesempaque InstalaciónFunciones DEL Panel Frontal Interruptor DE CorrienteBraker Funciones DEL Panel Trasero Parrilla DEL Ventilador Interruptor DDT Técnica DE Detección DE DistorsiónBarrera DE Entradas Conectador DE Entrada ComboSalida DE GRAVES/ a Través Modo Puente Page Peavey Electronics Corporation Limited Warranty 2001

PV Series specifications

Peavey is a well-known name in the music industry, particularly recognized for its range of audio equipment. Within its extensive portfolio, the PV Series stands out as a line of amplifiers and speakers that have earned a reputation for delivering high-quality sound performance and robust build quality. The PV Series is designed to cater to a variety of audio needs, making it an essential choice for musicians, sound engineers, and event organizers alike.

One of the main features of the PV Series is its impressive power handling capacity. The PV amplifiers are built to deliver high wattage output, ensuring that even in large venues, audio enthusiasts receive clear and powerful sound. This capability is complemented by the series' advanced speaker design, which includes high-efficiency drivers and reinforced construction. Whether for live performances, studio applications, or installation in permanent venues, the PV Series maintains clarity and fidelity at both low and high volumes.

Another defining characteristic of the PV Series is its versatility. The range includes powered and passive speakers designed to cater to a wide spectrum of sound reinforcement needs. The powered speakers offer built-in amplifiers, eliminating the need for external power sources, which simplifies setup and transportation. On the other hand, the passive speakers can be paired with various amplifiers to suit specific performance requirements.

Peavey’s unique technologies are also pivotal to the PV Series’ acclaim. The series benefits from proprietary innovations such as the DDT (Dynamic Drive Limiting) technology, which helps prevent distortion by monitoring signal levels in real-time. This ensures that users can push their equipment to the limit without risking damage to their speakers, providing peace of mind during critical performances.

Durability is a hallmark of the PV Series. The enclosures are made from high-quality materials designed to withstand the rigors of travel and use. Features such as reinforced corners, heavy-duty grills, and weather-resistant finishes make these products suitable for both indoor and outdoor use.

Finally, the PV Series offers an appealing price-to-performance ratio, making high-quality audio accessible to a wider range of users. Whether one is a seasoned professional or a budding enthusiast, the Peavey PV Series provides reliable and powerful audio solutions that stand the test of time. With a combination of power, versatility, and durability, it continues to be a preferred choice in various audio environments.
Top Page Image Contents