Crest Audio PRO SERIES 7301 - User Manual

Power Specifications Both ch. @ 4Ω Lows @ 2Ω / Highs @4Ω Lows @ 4Ω / Highs @8Ω Lows @ 8Ω / Highs @16Ω
High Frequency Power @ 1kHz, <0.05% THD 940 Watts 990 Watts 940 Watts 670 Watts
Low Frequency Power @ 100Hz, <0.1% THD 240 Watts 220 Watts 125 Watts 95 Watts
Figures are Watts per channel, both channels driven.
Product Description
The Crest Audio 7301 is a two rack space, compact power ampli-
fier specifically designed for use in bi-amplified systems, includ-
ing stage monitor, studio monitor and front-of-house applica-
tions. The low frequency channel (Ch. A) utilizes class H opera-
tion, which increases efficiency and yields higher output power
on the low end. The high frequency channel (Ch. B) utilizes class
AB operation which is optimized for precise reproduction of mid
and high-frequency signals.
For bi-amped systems, the Crest Audio 7301 is unmatched in
quality, efficiency and sonic accuracy. When used in combina-
tion with a crossover (including those available in the Crest
Audio Octal Socket Accessory line), the 7301 becomes a com-
plete bi-amplification system, in a space-efficient package.
The 7301 is fully compatible in design with the other Crest
Audio Professional Series amplifiers, Octal Socket Accessories,
and the NexSys
®
computer controlled audio system.
Design and Construction
The no-compromise approach in the 7301’s electrical design and
mechanical construction provides the ultimate in reliability and
performance. Only high-grade components are used for the mod-
ular sub-assemblies in this ultra-strong, steel single piece chassis.
7301 Features
• Crest Audio’s legendary “overbuilt” power supply
• Toroidal power transformer
• Latest generation of high-speed, wide-bandwidth output
devices
• Tunnel cooling with back-to-front air flow
• Dual, variable speed DC fans
• High thermal mass heat sinks
• Balanced XLR inputs
• 5-way output binding post connectors
• Rear panel ground lift jumper
• 7301 protection circuitry:
- Clip Limiting prevents speaker damage with gentle gain
reduction at clip threshold.
- IGM (Instantaneous Gain Modulation) monitors connected
loads to detect conditions that may overstress output
devices, allowing safe operation into nominal 2Ω imped-
ances.
- AutoRamp gradually increases gain to attenuator setting
level when amplifier is turned on.
- Other protection circuitry: comprehensive thermal manage-
ment, and short circuit, DC voltage, turn-on/off transient,
current inrush and sub/ultrasonic input protection.
• Recessed, stepped attenuators
• Front panel circuit breaker/power switch
• Modular construction
• Full five-year warranty
(USA, Canada, U.K. & many other countries).
®
Crest Professional Series Amplifiers
are fully compatible with the NexSys
Computer-Controlled Audio system.
7301
POWER AMPLIFIER

Summary

Product Description and Design

Product Description

Details the 7301 amplifier's design for bi-amplified systems, its low and high frequency channels, and its space-efficient integration.

Design and Construction

Highlights the amplifier's no-compromise electrical and mechanical design using high-grade components and a robust steel chassis.

7301 Amplifier Features

Key Features Overview

Lists core features like legendary power supply, toroidal transformer, high-speed output devices, and tunnel cooling.

Protection and Control Features

Details protection circuitry such as Clip Limiting, IGM, AutoRamp, and front panel controls like attenuators and circuit breaker.

Warranty and Compatibility

Mentions compatibility with other Crest Audio systems and the standard five-year warranty.

Amplifier Specifications

Power Specifications

Provides detailed power output ratings across different impedances and frequencies for both channels.

General Specifications

Details frequency response, bandwidth, THD+N, damping factor, input sensitivity, impedance, and noise levels.

Electrical and Mechanical Details

Covers power supply, current draw, thermal emissions, cooling, front/rear controls, LED indicators, construction, and dimensions.

Architects & Engineers Specifications

Performance Requirements

Specifies minimum power output, channel types (Class H/AB), and protection circuitry for system integration.

Operational and Electrical Standards

Details cooling, protection features, gain increase, impedance sensing, clip limiting, and voltage/frequency compatibility.

Physical and Connectivity Standards

Defines front panel controls, input/output connectors, rack mounting, dimensions, weight, and model designation.

Crest Audio PRO SERIES 7301 Specifications