TourClass protection | Peavey LT Series, ST Series manual

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TourClass® protection

Just like Crest Audio’s highly acclaimed Pro series amps, LT and ST amps incorporate TourClass protection features. Derived from Crest Audio’s extensive experience with the world’s largest sound rental companies, the TourClass group of circuits sets the industry standard for assured protection of internal amplifier circuits and all connected loads.

ACL ACTIVE CLIP LIMITING

At the amplifier’s full power limit, or clipping point, ACL will be activated.This is indicated by illumination of the ACL / IGM LED.The channel gain is automatically reduced, protecting the loudspeakers from potential damage from the high power, continuous square waves that would otherwise be produced. ACL may be activated by uncontrolled feedback, oscillations, improper equipment gain settings, or an equipment malfunction upstream from the amplifi- er. Only steady or excessive clipping (not normal program transients) will trigger ACL. The circuit is virtually transparent in operation and full signal bandwidth is maintained.

IGM INSTANTANEOUS GAIN MODULATION

IGM is an innovative circuit that allows the amplifier to operate safely into loads as low as 2 ohms.When the amplifier sees a load that overstresses the output stage,the IGM circuit adjusts the channel gain to a safe level. This gain control circuit is inaudible in normal use. In addition, if extreme and sustained low impedance is encountered, the amplifier’s output relay will open.

AutoRamp

Auto Ramp operates every time the amplifier is turned on or is reactivated after a protect condition is corrected.This exclusive Crest Audio feature gradually increases gain to the atten- uator setting avoiding unnecessary stress on the loudspeakers.

Thermal Protect

Abnormally high heat sink temperatures will engage the Protect circuit and disconnects the output relays. During this time the Prot LEDs will light red.The cooling fan will continue run- ning at high speed. Normal operation resumes once the amplifier cools to a safe level.

Short Circuit

If an output is shorted (i.e. defective speakers or crossed speaker wires) the channel will shut- down and can be re-set by turning the amplifier off, then on.

DC Voltage

If an amplifier channel detects DC voltage at its output terminals, the output relay will immediately open to prevent loudspeaker damage. The protect LEDs illuminate.

Subsonic Frequencies

Built-in high pass filtering provides subsonic frequency protection for each channel. In addition, a relay will open if excessive subsonic energy appears at the output.

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LT Series, ST Series specifications

Peavey Electronics, a pioneer in audio equipment, has made significant strides in the amplifiers market, particularly with its LT and ST series. These series embody Peavey’s commitment to quality sound, rugged design, and innovative technology, making them popular among both novice musicians and seasoned professionals.

The Peavey LT Series is designed primarily for portable use, making it an excellent choice for musicians on-the-go. One of the prominent features of the LT Series is its lightweight construction, allowing for easy transport without compromising sound quality. The series incorporates advanced DSP technology, which provides users with a variety of sound shaping tools. This includes presets for different genres and venues, ensuring that artists can achieve the desired tone quickly and efficiently. Additionally, the LT models often include Bluetooth connectivity, enabling musicians to stream music and use mobile apps for easy control and adjustments.

On the other hand, the Peavey ST Series is tailored more towards permanent installations and professional settings. These models boast higher wattage output, catering to larger venues and more demanding applications. The ST Series amplifiers are renowned for their robust build quality, with heavy-duty enclosures designed to withstand the rigors of live performances. The signature Peavey sound is preserved in these models, thanks to their high-efficiency circuits and premium components. The ST Series is equipped with advanced cooling systems to prevent overheating, ensuring reliable performance even during extended use.

Both series utilize Peavey’s patented technologies, such as the DDT (Dynamic Download Technology) which protects speakers from distortion by dynamically adjusting power levels without sacrificing sound fidelity. This technology not only enhances sound clarity but also extends the life of the connected speakers, making the LT and ST series efficient and long-lasting investments.

Moreover, the user interface on Peavey’s LT and ST models is designed for ease of use, featuring intuitive controls that allow musicians to tweak their sound in real time without getting lost in complex menus. The durability and reliability of these amplifiers make them suitable for a variety of applications, from small venues to large concert halls.

In summary, the Peavey LT and ST series represent exceptional choices for various musical contexts, driven by innovative technology, quality construction, and versatile performance capabilities. Whether needed for portable gigs or fixed installations, these series deliver powerful, clear sound that meets the demands of today’s musicians.