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O 410 - Active Studio Monitor
General Description

Back in 1967, we launched the world’s first active multi-channel studio monitor, the OY. The O 410 represents the latest incarnation of the many technologies pioneered by us during the intervening 40 years. Engineering excellence applied to all aspects of the O 410 design brings a new benchmark in audio reproduction quality. A waveguide featuring Mathematically Modeled Dispersion™ (MMD™), flexible acoustical controls, various input options, and an extensive mounting hardware range allow the O 410 to be used in diverse acoustical conditions, with any source equipment, and in a wide variety of physical locations.
The O 410 has been designed for use as a mid-field or main monitor. It is particularly well-suited for use in music, broadcast, and post production studios for tracking, mixing, and mastering. The O 410 can be used free-standing or flush mounted into a wall, and, in multichannel systems, can be mixed freely with other loudspeakers in the range.


Mid Sized 3-way System
 The most important part of the frequency spectrum is reproduced by a separate midrange driver
 Extremely low harmonic and intermodulation distortion results in clean sounding audio reproduction
 Exceptionally neutral sound stage from 30 Hz to 24 kHz (±3 dB)
 Ideal cabinet materials with excellent self-damping properties
 Structural resonances avoided using LRIM™ (Low Resonance Integral Molding™)
 Vented enclosure extends bass response, even at very high output
 Modern-looking design with optional grille
 Extensive accessories allow for a multitude of installation possibilities
 Magnetically shielded for use next to CRT screens

Mathematically Modeled Dispersion™ (MMD™)
 Three stage design process:
 Waveguide is mathematically modeled before physical prototypes are realized, 
 Physical prototypes are measured under anechoic conditions to verify theoretical performance,
 Extensive listening tests correlate objective measurements and subjective perception
 Wide horizontal directivity gives increased freedom of movement along the mixing console
 Narrow vertical directivity reduces the effect of early reflections off the console surface
 MMD™ is easily rotated in the field when horizontal mounting the cabinet
 Perfect directivity pattern leads to a smooth power response

Advanced Electronics
 Transformer balanced input stage (TIM 1) equipped with special distortion reduction crossover function
 Electronics can be remotely accessed when the cabinet is flush mounted (REK 1 and CP 2, CP 5, CP 10, CP 15, CP 20, CP 25, or CP 30)
 Integrated electronic limiter for each driver
 Hybrid class A-B amplifiers, employed for their best overall performance, are also protected
 Active three-way crossover with 24 dB/oct. slopes
 Display for power on and protect is integrated into the MMD™, together with a logo
 Controls adapt the monitor’s response to compensate for the loudspeaker’s environment:
 Bass, mid and treble controls for specific and common acoustical issues, 
 Parametric EQ for low-frequency corrections
 Accelerated Heat Tunneling™ (AHT™) ensures effective amplifier cooling whether the cabinet is mounted vertically or horizontally.
 Electronics can be remotely accessed when the cabinet is flush mounted
 Electronics can be remotely powered on with two modes of operation (0 V and 12 V trigger)
 Attention to detail in design results in low self-generated noise

Block Diagram (Download)

Award and Review  

TEC Award
2008 Nominee

 O 410 Front View 
White Background

     O 410 Rear View

· General Description
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