AudioSource EQ 25.1 Stereo Equalizer User Manual

Owner’s Manual
EQ 25.1
Modular Dual Channel Graphic Equalizer
Basic Guidelines
A graphic equalizer adjusts the sound of your audio system. Before setting the sliders, listen to your system and ask
yourself what you'd like to change about its sound. If you want more bass, for example, either raise the low frequency
sliders or lower the midrange or high frequency sliders. Do this for both channels. Conversely, if you'd like to hear
more high frequencies, either raise the high frequency sliders or lower the midrange or bass frequencies.
Using The Controls
Press this switch to turn the unit on or off. The red LED in the switch will light to show power is on.
These knobs individually control the volume level of each channel.
This switch refers to the hookups on the back of the EQ 25.1. If you are using XLR or balanced inputs (line 2),
depress this button. If you are using RCA or unbalanced inputs (line 1), leave this button in the out position.
Use this switch to compare the equalized and unequalized sound. Depress this button to hear the equalized sound.
Leave this switch in the out position to hear the unequalized sound.
EQ Sliders
There are five sliders each for Channels 1 and 2, which usually correspond to the left and right channels. Each slider
has a range of 12 dB to boost or cut its particular frequencies. The lowest frequency sliders (60 Hz) are on the left,
the highest frequencies (10 kHz) on the right. The range of this EQ corresponds with all but the extremes of human hearing. Adjusting the sliders makes
it simple to alter the sound of your system. For instance, the lowest note of a bass guitar is around 42 Hz. Adjusting the 60 Hz sliders adjusts the level of
the bass guitar, bass drum, and other instruments within this frequency range. Usually, identical adjustments should be made for each channel.
Hooking It Up
DVD Player,
CD Player or
Other Source
When connecting the EQ 25.1,
turn off or unplug your
components. This prevents
loud “pops” that might
damage your speakers
while you connect the cables.
We recommend that you use the
EQ 25.1 with a preamplifier or
other sort of mixer. The diagram
at right shows the EQ 25.1 in
conjunction with other components from AudioSource’s modular
separates line. You can substitute
any amp or preamp; the setup
is the same. Also, XLR/balanced
connections follow the same paths
as the RCA/unbalanced connections described below.
Audio Out
Audio In
Line 1
Line 1
Ch. 1
Ch. 2
Ch. 1
Ch. 2
Ch. 1
Ch. 2
Line 2
Ch. 1 In
Ch. 2 In
Ch. 1 In
Ch. 1
Line 2
Balanced Input
Ch. 2
Ch. 2 In
Balanced Input
Line In
Line Out/
Line Out/
Speaker Output
Ch. 1 Out
Line 2
Ch. 2 Out
Preamp 5.1
120 VAC
60 Hz
12 Watts
Ch. 1 Out
Line 2
60 Hz
Speaker Output
Ch. 2 Out
EQ 25.1
120 VAC
Line In
12 Watts
Amp 5.1
120 VAC
60 Hz
200 Watts
Amp 5.1
120 VAC
60 Hz
200 Watts
1. Connect the source component (e.g. DVD player, CD player, cassette deck, microphone) to the preamp input.
2. Connect the two output channels of the preamp to the EQ inputs. In this diagram, Channel 1 is left and Channel 2 is right.
3. Connect the Channel 1 and 2 outputs from the EQ to the amplifier inputs. Please note that the Amp 5.1 is a single-channel monoblock amplifier, which
is why two of them are required in this example. Rather than two monoblocks, you could also use a single stereo amplifier, such as an Amp 6.2 or 6.3.
Note: If any part of this product is damaged or missing, do not contact your AudioSource dealer. Please call us directly at 800-435-7115.
Safety Instructions
Warning: To reduce the risk of fire or electric shock, do not expose this appliance to rain or moisture.
Caution: To reduce the risk of electric shock, do not remove cover (or back); no user serviceable parts inside. Refer servicing to qualified service personnel.
Caution: To prevent electric shock, match wide blade of plug to wide slot, fully insert.
Attention: Pour eviter les chocs electriques, introduire la lame la plus large de la fiche dans la borne correspondante de la prise et pousser jusqu'au fond.
The lightning flash with arrowhead symbol, within an equilateral triangle, is intended to alert the user to the presence of uninsulated dangerous voltage within the product's enclosure that may be of sufficient magnitude to constitute a risk of electrical shock to persons. The exclamation point within an equilateral triangle is intended to
alert the user to the presence of important operating and maintenance (servicing) instructions in the literature accompanying the appliance.
Read Instructions
Power Cord Protection
All the safety and operating instructions should be read before the appliance
is operated.
Power supply cords should be routed so that they are not likely to be walked
on or pinched by items placed on or against them, paying particular attention
to cords at plugs, convenience receptacles, and the point where they exit from
the appliance.
Retain Instructions
The safety and operating instructions should be adhered to.
Heed Warnings
All warnings on the appliance and in the operating instructions should be
adhered to.
The unit should be cleaned only as recommended by the manufacturer.
Power Lines
An outdoor antenna should be located away from power lines.
Follow Instructions
Non-Use Periods
All operating and use instructions should be followed.
Water and Moisture
The appliance should not be used near water. For example, near a bathtub,
washbowl, kitchen sink, laundry tub, in a wet basement, or near a swimming
pool, etc.
The appliance should be situated so that its location or position does not
interfere with its proper ventilation. For example, the appliance should not be
situated on a bed, sofa, rug, or similar surface that may block the ventilation
openings; or, placed in a built-in situation, such as a bookcase or cabinet that
may impede the flow of air through the ventilation openings.
The appliance should be situated away from heat sources such as radiators, heat
registers, stoves, or other appliances (including amplifiers) that produce heat.
Power Sources
The appliance should be connected to a power supply only of the type
described in the operating instructions or as marked on the appliance.
Grounding or Polarization
Precautions should be taken so that the grounding or polarization means of
an appliance is not defeated.
The power cord of the appliance should be unplugged from the outlet when
left unused for a long period of time.
Object and Liquid Entry
Care should be taken so that objects do not fall and liquids are not spilled
into the enclosure through openings.
Damage Requiring Service
The appliance should be serviced by qualified service personnel when: a) The
power supply cord or the plug has been damaged; b) Objects have fallen, or
liquid has been spilled into the appliance; c) The appliance has been exposed
to rain; d) The appliance does not appear to operate normally or exhibits a
marked change in performance; or e) The appliance has been dropped, or the
enclosure damaged.
The user should not attempt to service the appliance beyond that described in
the operating instructions. All other servicing should be referred to qualified
service personnel.
Product Servicing
In the event your EQ 25.1 fails to operated properly, please contact the dealer
where you purchased the unit. Or you may contact AudioSource directly for
further assistance.
This manual provides detailed instructions for setting up your equipment. We also offer friendly, toll-free assistance.
EQ 25.1 Specifications
Frequency Response . . . . . . . . . . . . .10 Hz to 100 kHz ±1 dB
Signal to Noise Ratio . . . . . . . . . . . . . . . . . . . . . . . . . .>95 dB
Input Impedance . . . . . . . . . . . . . . . . . . . . . . . . . .47k Ohms
Output Impedance . . . . . . . . . . . . . . . . . . . . . . . . .600 Ohms
Inputs . . . . . . .Line 1 (RCA/Unbalanced), Line 2 (XLR/Balanced)
Outputs . . . . .Line 1 (RCA/Unbalanced), Line 2 (XLR/Balanced)
Control Range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .±12 dB
Power Consumption . . . . . . . . . . . . . . . . . . . . . . . . . .6 Watts
Dimensions . . . . . . . . . . . . . 7.125" x 2.25" x 16.5", 3.25 lbs.
Design and specifications are subject to change without notice.
9300 North Decatur
Portland, OR 97203
Tel. 503.286.9300
Fax 503.978.3302
© 2000 AudioSource, Inc.