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	Review 2009	Review 2009

Acoustics
−3 dB free field frequency response	30 Hz - 24 kHz, ± 3 dB
Pass band free field frequency response	32 Hz - 20 kHz, ± 2 dB
Self generated noise level at 10 cm	< 25 dB(A)
Total harmonic distortion < 0.5 % at 95 dB SPL at 1 m	> 100 Hz
Max. SPL in full space / calc. in half space at 3% THD at 1m	115.8 / 121.8 dB SPL (averaged between 100 Hz and 6 kHz)
Bass capability: Max. SPL in half space at 3% THD at 1m	111.9 dB SPL (averaged between 50 Hz and 100 Hz)
Max. short term SPL with IEC-weighted noise (IEC 60286-5) at 1 m, in typical listening conditions	112 dB(C) SPL
Max. short term SPL with music material at 2.3 m, in typical listening conditions (pair)	102 dB(C) SPL (full range) 110 dB(C) SPL (with subwoofer)
Max. long term SPL with pink noise at 2.3 m, in typical listening conditions (single/pair)	86 / 92 dB(C) SPL (full range) 98 / 104 dB(C) SPL (with subwoofer)
Electronics
Woofer amplifier, cont. output power (THD < 0.1%)	340 W
Woofer amplifier, peak output power	400 W
Midrange amplifier, cont. output power (THD < 0.1%)	160 W
Midrange amplifier, peak output power	190 W
Tweeter amplifier, cont. output power (THD < 0.1%)	180 W
Tweeter amplifier, peak output power	210 W
Controller design	Analog, active
Crossover - Frequency	600 Hz / 2.0 kHz
Crossover - Slope	24 dB/oct
Equalization - Bass	0; -2.5; -5; -7.5 dB
Equalization - Mid	0; -1,5; -3; -4,5 dB
Equalization - High	1; 0; -1; -2 dB
Parametric Equalizer	Bypassable
Parametric Equalizer - Gain	+4 ... -12 dB
Parametric Equalizer - Frequency	20 ... 200 Hz
Parametric Equalizer - Q	1 ... 8
Protection circuitry	Limiter: low, mid, high
Infrasonic filter: frequency/slope	15 Hz; 12 dB/oct
Input, analog
Impedance, electr. symm.	XLR, 13 kΩ
Impedance, bal. floating	XLR, 4.7 kΩ*
Input sensitivity	-8 dBu/+6 dBu
Max. input level	+19 dBu (6.9 Vrms)
Gain Control	-9 ... +6 dB
CMRR	> 60 dB @ 15 kHz
Displays, indicators - power on	Logo "red"
Displays, indicators - limit / clip	Protect
Mains	100, 120, 230 V AC swichable
Power consumption - idle	36 VA
Power consumption - full output AC; DC	1.300 VA
Mechanics
Cabinet surface	Painted
Color standard	Anthracite (RAL 7021), silver (RAL 9006)
Baffle cover	Optional metal grille, removable
Drivers	Magnetically shielded
Woofer	265 mm (10")
Midrange	76 mm (3")
Tweeter	25 mm (1")
Mounting points	8 x M5 on rear
Height x width x depth	645 x 330 x 444 mm (25 3/8" x 13" x 17 1/2")
Net volume internal	42 liters
Weight	36 kg (79.4 lbs)
Delivery includes	1x O 410 1x Power cables (Euro, UK, USA) 1x Operation manual 1x Production certificate 1x Product guarantee 1x Trimmer and switch screwdriver
Accessories	Mounting on a floor stand (e.g. K&M 26750, 26735)
	O 410 + LH 41 + LH 28 + stand
	O 410 + LH 41 + LH 36 + LH 28 + stand
	Mounting on a design monitor stand (e.g. K&M 26790, 26795)
	O 410 + LH 41 + stand
	O 410 + LH 41 + LH 36 + LH 29 + stand
	Mounting on a lighting stand
	O 410 + LH 41 + LH 29 + stand
	O 410 + LH 41 + LH 36 + LH 29 + stand
	Mounting on subwoofer
	O 410 + LH 41 + LH 28 + pole + KH 870
	O 410 + LH 41 + LH 36 + LH 28 + pole + KH 870
	O 410 + LH 41 + LH 36 + LH 37 + KH 870
	O 410 + LH 41 + LH 37  + KH 870
	Mounting on a wall
	O 410 + LH 42 + LH 45 + wall
	Mounting off a ceiling
	O 410 + LH 42 + LH 43 + ceiling
	O 410 + LH 42 + LH 46 + ceiling
	Mounting off a lighting or truss bar
	O 410 + LH 42 + LH 29 + G-clamp + bar
	Other accessories TIM 1, REK 1, GO 410 B, FO 410, CP 2, CP 5, CP 10, CP 15, CP 20, CP 25, CP 30

*user fitable option

* Sold out

O 410 Active Midfield Monitor
Three-way tri-amplified monitor with thermally protected 210 + 190 + 400 W remotable class A/B-amplifiers. Magnetically shielded 1" titanium/fabric dome tweeter, 3" soft dome midrange and 10” woofer. Robust cabinet molded from LRIM and low-resonance materials with field-rotatable waveguide integrated into the front baffle. 13 kOhm electronic-balanced input on XLR-F with ground lift and optional 4.7 kOhm transformer-balanced input module. 4th order crossover, and four-position "Bass", "Mid", "Treble" and parametric EQ acoustical controls. Independent low/mid/high and excursion limiters indicated on the front panel display. Maximum SPL is 121.8 dB at 1 m (3% distortion), pass band frequency response 30 Hz - 24 kHz (-3 dB). Self-generated noise level <5 dB(A) at 1 m. 12 V trigger remote power on. Cabinet volume 42.0 liters, dimensions 645 x 330 x 444 mm
(25 3/8" x 13" x 17 1/2"), and weight 36.0 kg (79.4 lb). Eight M5 threads on rear panel for attaching to our mounting hardware. Optional metal grille. Standard cabinet colors: RAL 7021 (anthracite) and RAL 9006 (silver).