Quagliardi Channel Strip – 1U Horizontal 500-Series Preamp, FET Compressor, and ParaShelving EQ

OVERVIEW

The Quagliardi Channel Strip is the brand’s flagship all-analog signal chain, uniting the 501+ Preamp, 576 FET Compressor, and 523 ParaShelving EQ into a cohesive 1U horizontal 500-series system. Housed in the PowerGrid Trio chassis, this channel strip delivers a complete front-to-back analogue workflow designed for tracking, mixing, and tone shaping with absolute control and character.

From pristine gain and musical saturation to fast, punchy FET compression and refined tonal sculpting, the Quagliardi Channel Strip offers a versatile, studio-grade solution built around premium components, custom transformers, and discrete circuitry. Whether capturing vocals, instruments, or shaping complex sources, it provides unmistakable analogue depth, flexibility, and sonic authority in a compact format.

KEY HIGHLIGHTS

Flagship All-Analog Signal Chain

Combines preamp, compressor, and EQ into a fully integrated 1U channel strip.

501+ Preamp – Clean to Characterful

Transparent at lower gains, rich and colourful when driven, with transformer-based saturation.

576 FET Compressor – Fast, Musical Control

Classic FET compression inspired by legendary designs, enhanced with modern flexibility.

523 ParaShelving EQ – Precision Tone Shaping

Dual-band parametric EQ with switchable shelving and harmonic colouration.

PowerGrid Trio Chassis

Horizontal 500-series frame with external PSU, Ground Lift, and module-linking features.

FEATURES

• 1U horizontal channel strip configuration
• Includes 501+ Preamp, 576 FET Compressor, and 523 ParaShelving EQ
• Discrete analogue signal path throughout
• Permalloy transformers and 2520-style op-amps
• Front-panel combo input (XLR mic or Hi-Z instrument DI)
• FET compression with parallel compression capability
• Stereo-linkable compressor design
• Dual-band parametric EQ with switchable shelving modes
• BLUE harmonic colouration circuit
• True Bypass on EQ section
• PowerGrid Trio chassis with external power supply
• Ground Lift and Feed functions for seamless module linking

TECHNICAL SPECS

Format: 1U Horizontal 500-Series Channel Strip

Modules Included:

• 501+ Preamp
• 576 FET Compressor
• 523 ParaShelving EQ

Preamp Circuitry:

• Permalloy Transformer
• 2520 Operational Amplifier

Compressor Topology: BF245 FET-Based Gain Control

EQ Topology: Dual-Band Parametric with Switchable Shelving

EQ Functions:

• Gain
• Frequency
• Bandwidth
• True Bypass
• BLUE Colouration

Chassis: PowerGrid Trio Three-Slot Horizontal Frame

Power Supply: External PSU

Compatibility: VPR Alliance 500-Series Standard

Functions:

• Ground Lift
• Feed Linking Between Modules