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Radio Design Labs

Radio Design Labs RU-ADA4D Audio Distribution Amplifier

Name: Radio Design Labs RU-ADA4D Audio Distribution Amplifier
Brand: Radio Design Labs
SKU: RU-ADA4D
Price: 458.40 GBP
Availability: LimitedAvailability

£458.40inc. VAT

£382.00 ex. VAT

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Bought in the UK, backed in the UKWhy it matters →

In UK stock, ships from the UK
UK manufacturer warranty
UK-based engineers
No import duty or customs charges
GBP pricing, UK VAT invoices

Return within 14 days

Installation services available Purchase orders: education customers only

7 Years Warranty Included

Key specifications

Inputs (2)Stereo (A/left and B/right) on detachable terminal block

Input Impedance20 kΩ balanced or 10 kΩ unbalanced

Input Level+4 dBu balanced (nominal), +25 dBu maximum; -10 dBV unbalanced

Input Gain Adjustments (2)-5 dB to +15 dB (rel. +4 dBu balanced); -3 dB to +17 dB (rel. -10 dBV unbalanced)

Input Metering (2)Dual-LED VU Meter for Input A and Input B

Mono modeRear-panel switch-selectable (input A feeds all 8 outputs)

Outputs (8)Stereo, A (4), B (4) on detachable terminal blocks

Output Impedance150 Ω balanced; 75 Ω unbalanced

All 20 specifications

Description

The RU-ADA4D is a four channel stereo audio distribution amplifier with input and output gain adjustments and input level metering. The module may be operated in mono to provide up to eight distributed mono signals. The inputs and outputs are connected on rear-panel detachable terminal blocks.

Full specifications Datasheet Compare alternatives

Each of the two line level inputs accepts either a balanced or an unbalanced signal. Each input is equipped with a front panel INPUT GAIN trimmer. Input signal levels between -14 dBV unbalanced and +9 dBu balanced may be set to the proper operating level as indicated by a dual-LED VU meter. This assures ample headroom at all normal operating levels. The maximum input level is + 25 dBu.

A rear-panel switch selects between stereo and mono operation. In the mono position, input A (left) is used to drive all 8 output channels. When the module is used in a monaural system, only input A must be wired.

The RU-ADA4D offers exceptional headroom, very low distortion, excellent crosstalk isolation, wide flat frequency response and extremely low noise with very high common-mode signal rejection. It provides exceptional audio performance for the most critical applications in a professional audio environment.

The RU-ADA4D operates from 24 Vdc connected through a rear-panel detachable terminal block.

Key features:

• Stereo Audio Distribution with 4 Outputs

• Mono Audio Distribution with 8 Outputs

• Front-Panel Input Level Trimmers

• Dual-LED VU Meter for Each Input Channel

• Front-Panel Output Level Trimmers

• Inputs and Outputs on Rear Panel Detachable Terminal Blocks

• Exceptional Audio Quality for the Most Demanding Applications

Manufacturer part number RU-ADA4D.

Key features

Inputs (2)

Stereo (A/left and B/right) on detachable terminal block

Input Impedance

20 kΩ balanced or 10 kΩ unbalanced

Input Level

+4 dBu balanced (nominal), +25 dBu maximum; -10 dBV unbalanced

Input Gain Adjustments (2)

-5 dB to +15 dB (rel. +4 dBu balanced); -3 dB to +17 dB (rel. -10 dBV unbalanced)

Input Metering (2)

Dual-LED VU Meter for Input A and Input B

Mono mode

Rear-panel switch-selectable (input A feeds all 8 outputs)

Outputs (8)

Stereo, A (4), B (4) on detachable terminal blocks

Output Impedance

150 Ω balanced; 75 Ω unbalanced

Technical specifications

Connectivity

Inputs (2)Stereo (A/left and B/right) on detachable terminal block

Input Impedance20 kΩ balanced or 10 kΩ unbalanced

Input Level+4 dBu balanced (nominal), +25 dBu maximum; -10 dBV unbalanced

Input Gain Adjustments (2)-5 dB to +15 dB (rel. +4 dBu balanced); -3 dB to +17 dB (rel. -10 dBV unbalanced)

Input Metering (2)Dual-LED VU Meter for Input A and Input B

Outputs (8)Stereo, A (4), B (4) on detachable terminal blocks

Output Impedance150 Ω balanced; 75 Ω unbalanced

Output Level+4 dBu balanced (nominal), +24 dBu maximum; -10 dBV unbalanced

Output Level Adjustments (8)-9 dB to +6 dB (rel. +4 dBu, balanced); -3 dB to + 12 dBu (rel. -10 dBV, unbalanced)

Power & Physical

Case dimensions5.75" (14.6 cm)W x 1.65" (4.18 cm)H x 3.54" (9.0 cm)D; 3.9" (9.9 cm)D with connectors

Shipping Weight1.38 lbs.

General

Mono modeRear-panel switch-selectable (input A feeds all 8 outputs)

Frequency Response10 Hz to 165 kHz (+/- 0.25 dB); 10 Hz to 35 kHz (+/- 0.01 dB)

THD+N< 0.0025% (20 Hz to 20 kHz)

Headroom> 20 dB (above +4 dBu input or output)

Noise< -92 dB (below +4 dBu output, 20 Hz to 20 kHz)

Crosstalk< -90 dB (20 Hz to 5 kHz); <-80 dB (5 kHz to 20 kHz)

CMRR> 90 dB (100 Hz)

Ambient Operating Environment0° C to 50° C

Power RequirementGROUND REFERENCED, 24 Vdc @ 82 mA (idle, nominal), 120 mA (max.)

Documents

Radio Design Labs RU-ADA4D Audio Distribution Amplifier — RDL Datasheet

Delivery & returns

Estimated delivery 9 Sept - 13 Sept. UK mainland delivery only. Some large or made-to-order items carry longer lead times, shown on the product page.

Unused items in original packaging can be returned within 14 days of delivery — see the returns policy for how business and consumer returns differ. Faulty items are covered under manufacturer warranty and by your statutory rights.

Full delivery & returns policy

Bought in the UK, backed in the UK

This item is in UK stock and ships to you from within the UK, so the order never crosses a customs border on its way to you.
The manufacturer warranty is honoured here in the UK. If something fails, you deal with us, not with an overseas seller in another time zone.
Our own UK-based engineers install, commission and support what we sell, and can attend site when a system needs hands on it.
Delivered within the UK mainland, so there is no import duty, customs charge or courier handling fee waiting for you on delivery.
Prices are in pounds sterling with proper UK VAT invoices, and purchase orders are accepted from approved education accounts: no currency conversion and no surprises at the door.

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Payment & security

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