The Klein+Hummel Monitor Speaker Model OY is a wall-mounted Loudspeaker with two built-in 30  Watt SiLicon-Transistor-Amplifiers which permits  highest-quality monitoring without  the  need for separate power amplifiers. As a result of its small size, it can be mounted in a  most favorable position in control rooms, mix-down areas, editing rooms, disk-cutting Laboratories, etc.

The ModeL OY Loudspeaker may be conveniently mounted next to the picture monitor in TV control rooms  so that  the sound seems to come from the direction of the picture, and all this without the bother of separate power amplifiers.

Recent  advances in Loudspeaker enclosure design has made it possibLe to achieve Low-frequency reproduction even with cabinets of such small size. The Klein+Hummel Model OY Monitor Speaker at last makes possible quality monitoring for location recording and broadcasting as well as for TV remote vans where space is at a premium. All that the model OY requires at  its input is a line level low impedance buss. The  stringent requirements with respect to frequency response and distortion which studio monitors pose are completely fulfilled by the Model OY.

Free-field transmission characteristic measured with third octave band noise between 80 Hz and 12,5  kHz	Frequency-independent with maximum deviation of ± 2 dB
Harmonie distortion D2 and D3 (above 200 Hz) measured at 86 dB at a 1-m distance	≤ 1 %
Sound pressure Level at a 1m distance at full modulation	104 dB/SPL
Elektronics
Low frequency amplifier	30 W at 4 ohms
LMid-range/high frequency amplifier	30 W at 4 ohms
Crossover frequncies	500 Hz and 3 kHz
Slope of crossover roll-off	12 dB/Octave
Input, (balanced, floating)
Input impedance	> 4700 ohms
Input sensitivity	+ 0 dBu or +6 dBu (0,775 V or 1,55 V) additionally adjustable attenuator
Location-dependent equalisation switch	Position 4 - free speaker position (no room boundaries) Position 3 - speaker position at a wall (1-room boundary) Position 2 - speaker at one room corner (2-room boundaries) Position 1 - speaker in a roorn corner (3-room boundaries)
High-frequency control switch 10 kHz	Position 1 - - 3 dB Position 2 - ±0 dB (factory adjusted) Position 3 - +3 dB  Position 4 - +6 dB
Mechanics
Cabinet surface finish	NEXTEL Painted
Cabinet color: custom	Anthracite
Speaker equipment
Woofer	245 mm, 6 ohms, Typ TR 12 AL
Mid-range speaker	100 mm, 6 ohms, Typ PCH 102
Tweeter	19 mm, 8 ohms, Typ T 35
Dimensions	310 x 480 x 230 mm
Volume	34 l
Weight	16 kg