KAM KEQ152 Instruction Manual

OVERVIEW

The Kam KEQ152 Hifi Graphic Equaliser is designed for matching your music source to the
acoustics of the area in which it is to be heard. For this 2 channels with controls each for
boosting and attenuating of frequency band levels in the range of 25Hz up to 16KHz are provided.
The range of these controls can be switched over from ±6dB to ±12dB. Due to the versatile
adjusting facilities the KEQ152 can also be used for any other frequency response equalisation
and adjustment of units with line level.

This KEQ152 combines all the features required while maintaining a high level of build quality
and specification.

q EQUALISER CONTROL LEVERS

Controls for boosting and attenuating the respective frequency band level.

w CHANNEL EQ ON/OFF SWITCH

When depressed, the adjustments for the respective channel is effective, if the button is released
the channel is by-passed.

e PEAK LED

r CONTROL RANGE SELECTORS

This switch controls the range of the equaliser controls. When depressed the control range is
±6dB, when the button is released, the control range is ±12dB.

t SUBSONIC/LOW CUT FILTER SWITCH

This is a low cut filter for frequencies in the 20Hz/-3dB range. When the button is depressed, the
filter is on.

y INPUT LEVEL CONTROL

As the name suggests, this controls the level of the input signal.

u POWER ON SWITCH

Powers the unit up.

i MAINS CABLE 230V~50Hz

o GROUND LIFT

Switch to separate the signal ground from the housing safety ground to avoid ground loops. In
FLOAT position the ground of the signal and the housing are separated. In the GROUND position
the housing and signal groundings are connected

1) PHONO INPUTS

1! PHONO OUTPUTS

For notes on using your Kam KEQ152 HIfi Graphic Equaliser please refer to the back page.

KAM KEQ152

HIFI GRAPHIC EQUALISER

NOTES ON USING THE KAM KEQ152 HIFI GRAPHIC EQUALISER

Prior to first switching on, set all controls to mid-position. Disengage the buttons EQ ON. Switch on the
KEQ152, if there is a humming due to a hum loop (e.g. ground connection from the housing via the rack
to another housing), set the ground lift switch to FLOAT. This will separate the signal ground from the
housing ground. Pass an input signal to the KEQ152, if one of the PEAK LEDs lights up, reduce the
input levels of both channels.

NOTES ON FREQUENCY RANGES

The range of average human hearing reaches from approx 20Hz to 20KHz. The greatest sensitivity is
between approx 1 and 4KHz. Therefore changes of the KEQ152 can be heard more clearly in this range
than changes in the high and low frequencies. CAUTION: With extensive boosting of the frequency band
levels (mainly the bass and top ranges), speakers may be quickly overloaded and destroyed. Additional
equalisers in your system e.g. the amplifier, must first be set to zero (mid position).

The individual controls for the frequency levels should separately be adjusted as follows.

Subwoofer range 25Hz / 40Hz: These really only control non music frequencies like turntable rumble and

subsonic noise. They should be slided into the lower (negative) range when adjusting.

Bass range 63Hz / 100Hz / 160Hz / 250Hz: Many musical instruments have their frequencies in this
range. If boosted too much, there is a thick, muddy sound. If it is attenuated too much, there is a thin
weak sound. If the speakers are unfavourably placed, (e.g. too close to walls), the bass can be boosted
too much, therefore can be equalised using the KEQ152.

Mid range 400Hz / 630Hz / 1KHz / 1.6KHz / 2.5KHz: In this range, the human hearing is most
sensitive. Therefore the equaliser adjustment is most likely to be used at these frequencies. In dance
and pop music boosting these signals can give a more aggressive effect, especially good for improving
the voice intelligibility.

Tweeter range 4KHz / 6.3KHz / 10KHz: In this range are many of the harmonics of the music input. As
soft materials (e.g. carpet) can reduce these signals, these sometimes need boosting to restore the
original sound.

Super Tweeter range 16KHz: This is most useful for filtering out interfering noises (e.g. hiss).

SPECIFICATION

FREQUENCY RANGE 10 - 20,000Hz

CONTROL RANGE Switchable to ±6 / ±12dB

CONTROL FREQUENCIES 25/40/63/100/160/260/400/630Hz /1/1.6/2.5/4/6.3/10/16KHz

LOW CUT FILTER 20Hz / -3dB

INPUT 0.775V / 50KΩ

OUTPUT 0.775V / 600Ω

S/N RATIO 66dB

THD 0.1%

POWER SUPPLY 230V - 50Hz - 6VA

DIMENSIONS 482 x 44.5 x 165mm

WEIGHT 2.5kg

Due to continuous product development, specifications are subject to change.

Kam products are distributed by Lamba plc Unit 1, Southfields Road, Dunstable, Bedfordshire, United Kingdom LU6 3EJ

Telephone: (+44) (0)1582 690600 • Fax: (+44) (0)1582 690400 • Email: [e-mail] • Web: www.lambaplc.com

© COPYRIGHT LAMBA plc 2003. E&O E.