SAM™ Studio Monitor

Shaped by decades of engineering expertise and armed with the power of Smart Active Monitoring technology, the 1238AC is a centre channel monitor designed for the most demanding applications.

Active Crossovers

Directivity Control Waveguide (DCW™) Technology


121 dB

Frequency Response

30 Hz - 22 kHz (-6 dB)


H 350 x W 950 x D 453 mm, (view in inches)

Perfect for multi-channel

As a centre-channel companion to the 1238A, the three-way 1238AC is perfect for multi-channel applications that require extremely uncoloured and precise on and off axis response, even at high SPLs and longer listening distances. With a choice of horizontal or vertical orientations, the controlled directivity of the 1238AC results in a wide, very stable sweet spot – so users can move freely around the console and still make accurate, reliable and informed mix decisions.

Configure, calibrate and control

As part of the growing Smart Active Monitoring family, the 1238AC integrates closely with our GLM software via which it can be configured and calibrated for your listening environment, compensating for detrimental room influences to create a truly optimised monitoring solution. Since producing multi-channel content that translates well to other rooms and systems relies on a good room and an extremely well-aligned monitoring system, the 1238AC is the natural choice for discerning professionals in high-end music production, post production and broadcast.


1238AC SAM™ Studio Monitor

Color options:
Package contains:

1 x 1238AC main monitor
1 x individually calibrated RAM-L
amplifier unit
1 x mains cable 1,8 m
1 x RJ45 cable 5 m
1 x RJ45 cable 10 m
2 x 4-pole speakon cable 10 m
1 x operating manual

2 years parts-and-labour (extended to 5 years with free registration).

GLM Calibration:
Requires free GLM software and either our 9320A SAM™ Reference Controller or GLM Calibration Kit device (both sold separately) for calibration.


1238AC SAM™ Studio Monitor

Color options:

Technical Specifications


121 dB

Amplifier Power

500 W Bass (Class D) + 250 W Midrange (Class D) + 200 W Treble (Class AB)

Frequency Response

30 Hz - 22 kHz ("-6 dB")

Accuracy of Frequency Response

± 2 dB (35 Hz - 20 kHz)

Driver Dimensions

2 x 250 mm Bass + 125 mm Midrange + 25 mm Treble (view in inches)


H 350 x W 950 x D 453 mm, (view in inches)


60 kg / 132.3 lb


1 x XLR Analog Input

1 x XLR AES/EBU Input

1 x XLR AES/EBU Output

2 x RJ45 Control

Key Technologies

Active Crossovers

Directivity Control Waveguide (DCW™) Technology

Intelligent Signal Sensing (ISS™) Technology

Optimised Amplifiers

Protection Circuitry

Smart Active Monitoring (SAM™) and GLM™ calibration technology

Using GLM | Walkthrough

Using GLM | The foundations

Using GLM | Controlling GLM with MIDI

Using GLM | GRADE Room Acoustic Report

Using GLM | Calibration Group IDs

Using GLM | Accounts and product registration

Using GLM | The technical details

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