SOUND DEVICES CND

Astral Guitar Box

Guitar signal converter, Lundahl LL1540 transformer, XLR to 1/4" TS and reverse conversion, ground lift, 5Hz–50kHz response, low-noise design.


$640.00 CAD
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Description

The Astral Guitar Box is a professional signal interface designed to seamlessly connect guitars, pedals, amplifiers, and Astral wireless receiver systems while maintaining exceptional audio quality. Built specifically for integration with Astral ARX16 and ARX32 receivers, it converts balanced XLR signals to unbalanced ¼-inch instrument connections, allowing guitar amplifiers and pedalboards to be positioned at greater distances without the noise and signal degradation commonly associated with long unbalanced cable runs. Its bidirectional design also enables conversion from unbalanced instrument signals to balanced XLR outputs, providing flexibility for a wide range of stage and studio applications.

At the core of the Astral Guitar Box is the renowned Lundahl LL1540 transformer, handcrafted in Sweden and widely respected for its transparent audio performance. Featuring a large core design, electrostatic shielding, and mu-metal protection, the transformer delivers an exceptionally flat frequency response from 5 Hz to 50 kHz with extremely low distortion. This preserves the natural character of guitars and basses while minimizing hum, interference, and ground loop issues. A built-in ground lift switch further helps eliminate unwanted noise, ensuring clean and reliable operation in demanding performance environments.

Designed for professional touring, recording, and live sound applications, the Astral Guitar Box combines premium components with practical functionality. Its rugged construction, rubberized chassis base, and reversible signal path make it a versatile addition to any guitar workflow. Whether connecting an Astral receiver directly to an amplifier or converting pedalboard outputs for balanced transmission, the Astral Guitar Box provides a reliable solution for maintaining pristine instrument tone across complex audio setups.

Features

Astral Guitar Box
Professional signal interface designed to connect guitar systems with Astral wireless receivers while maintaining exceptional audio quality over long cable runs.

Premium Lundahl Transformer
Features a Lundahl LL1540 transformer for transparent signal conversion with minimal distortion and outstanding audio performance.

Balanced to Unbalanced Conversion
Converts balanced XLR signals from Astral receivers to unbalanced ¼-inch TS connections for guitar amplifiers and pedal systems.

Unbalanced to Balanced Conversion
Can also operate in reverse, converting unbalanced ¼-inch TS signals into balanced XLR outputs for professional audio systems.

Bi-Directional Operation
Supports signal conversion in either direction using a dedicated Direction switch for flexible workflow integration.

Optimized for Astral Receivers
Custom designed to interface directly with Astral receiver analog outputs for seamless guitar and bass workflows.

Long Cable Run Support
Allows balanced signal transport over extended distances, reducing noise and signal degradation compared to traditional unbalanced runs.

Low Noise Performance
Helps minimize interference, hum, and unwanted noise during live and studio applications.

Ground Lift Switch
Includes a built-in ground lift switch to eliminate grounding issues and reduce hum in complex audio setups.

Transparent Audio Quality
Preserves the natural tone and dynamics of guitars and basses without adding unwanted coloration.

Wide Frequency Response
Delivers accurate signal reproduction across an extended frequency range for detailed instrument sound.

Low Distortion Design
Engineered to maintain signal integrity with extremely low distortion throughout the audio path.

Balanced XLR Connectivity
Features professional XLR connections for integration with broadcast, live sound, and recording systems.

¼-Inch TS Instrument Connection
Provides standard unbalanced instrument connectivity for amplifiers, pedals, and guitar equipment.

Ideal for Guitar and Bass Systems
Suitable for both electric guitar and bass guitar applications requiring high-quality signal transport.

Professional Stage Integration
Perfect for live performance environments where long cable runs and reliable signal transmission are required.

Broadcast and Production Ready
Well suited for professional audio, broadcast, touring, and production workflows using Astral wireless systems.

Compact Rugged Design
Built for dependable operation in demanding studio and live production environments.

Rubber Chassis Base
Features a rubberized bottom surface for stable placement and convenient mounting options.

Flexible Signal Routing
Can be used between receivers, pedalboards, amplifiers, stage boxes, and mixing consoles to simplify professional signal paths.

Specifications

General Specifications
Device Type: Guitar signal interface box
Application: Balanced XLR to unbalanced 1/4" TS conversion and reverse conversion
Compatibility: Sound Devices Astral receivers
Transformer: Lundahl LL1540
Operation Modes: Bidirectional

Audio Connections
XLR Input: 1
XLR Output: 1
1/4" TS Jack: 1
Signal Types: Balanced XLR, Unbalanced 1/4" TS

Signal Conversion
Mode 1: Balanced XLR to unbalanced 1/4" TS
Mode 2: Unbalanced 1/4" TS to balanced XLR
Direction Switch: JACK OUT, JACK IN

Compatibility
ARX32 Analog Output: AES72-1M
ARX8 Analog Output: DB25-M
ARX16 Analog Output: DB25-M

Transformer Specifications
Transformer Model: Lundahl LL1540
Core Material: 47 g
Frequency Response: 5 Hz to 50 kHz
Frequency Response Tolerance: ±0.2 dB
Electrostatic Shielding: Between winding layers
Magnetic Shielding: Full mu-metal shield

Audio Performance
Low Distortion Operation: Supported
Noise Reduction: Supported
Ground Loop Reduction: Supported
Hum Reduction: Supported

Controls
Direction Switch: 2-position
Ground Lift Switch: Supported

Physical Specifications
Chassis Base: Rubber bottom
Mounting Style: Desktop or stage placement
Form Factor: Compact signal interface box

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