Jensen EHT-909 User Manual

Your JENSEN EHT-909 is an

extremely powerful Active Subwoofer powered
by an on-board 280 Watt RMS amplifier. Twin 10”
heavy duty “monster” drivers – one down-firing and
one rear-firing will spread Bass throughout your room.

Floor Positioning: Best room location is in,

or across a corner. Bass response can vary slightly as Subwoofer
frequencies are mainly non-directional, and room acoustics may differ from one corner to the
next. Therefore we suggest trying two or three locations before settling on a permanent location.
This location of course, will need a Power Point.

Subwoofer amplifier features.

LEDs on front panel are Purple when active and Red when on standby. Standby mode, like on

a TV draws next to no power.

OFF/AUTO/ON switch: Leaving your EHT-909 ON permanently will remain ON and

continue to draw power and purple LEDs will continue to glow.
Switch to OFF when not using for long periods or when on
holidays (RED LEDs). We recommend switching to AUTO
permanently so your EHT-909 will activate automatically when
incoming signal is received (PURPLE) then revert to standby
(RED) when signal is ceased. When powering down, it is not
uncommon to take between 15 and 40 minutes for LEDs to revert to RED from PURPLE.
AUTO can be left on indefinitely.

PHASE Switch: Once your entire speaker system is completely set-up, flick this switch

from “0” to “180” and leave on setting that provides the most
Bass. Leave switch on “ 0” if no audible increase is detected.

If running multiple EHT-909’s, ensure all are set to same position.
This will ensure all woofers are operating together in the same room
so that Bass cancellation does not occur.

FREQUENCY Knob: This adjusts how low (in frequency terms) you wish your EHT-909

to operate at. In other words, 40 Hz is a way lower and deeper frequency than 100Hz. So if you
set at say, 70Hz you will be amplifying all music 70Hz and below and filtering out everything
above which is the correct intention of a Powered Subwoofer. Take care not to advance this
control too far as overloading may occur (see below setting recommendations).

EHT-909

.

.

OFF

AUTO

ON

PHASE

0

0

0

180

VOLUME Knob: Advance this Volume control to harmonize your EHT-909 with Front /

Center speakers etc. DO NOT set this on maximum (see below setting recommendations).

LOW LEVEL IN and OUT sockets: Connect to IN (red) socket from your AV

Receiver. The OUT (black) socket is to connect additional EHT-909’s using a 1RCA to 1 RCA
lead. You may add as many EHT-909’s as you are game (see page 3). You can buy these leads
in 2,5 or 10 mtr lengths from our website.

Connections.

Option A. Using with AV Receiver in 5.1, 7.1, 9.1 etc.

Connect a 1RCA to 1RCA
lead (available from
our website) from
SUB-OUT on
your AV
\Receiver
to LOW
LEVEL IN
(red socket).

Option B. Using with Stereo amplifier.

To add an EHT-909 Subwoofer to your Stereo
Speakers, run one pair Speaker Leads
from your Stereo amplifier to HI
LEVEL INPUT on EHT-909.
Then run another pair
Speaker Leads from HI
LEVEL to your existing
Speakers. With EHT-909
set to “AUTO” your
Subwoofer will activate
and work in sync with
your existing Speakers.

Note: there is no signal
or power loss between amplifier
and speakers, when “splicing-in”
your EHT-909 Subwoofer.

Stereo Amplifier.

Red/Black speaker

terminals.

Sub-Out

socket

.

Where should I set Volume & Frequency Knobs ??

Once you have your EHT-909 positioned and connected, we suggest experimenting with the
Volume and Frequency knobs to suit the Volume and depth of Bass desired. Initially, try setting

the Volume knob at 1 o’clock and the Frequency at 9 o’clock (70Hz). This popular
setting will boost Bass information 70Hz and below - which is deep, deep Bass at a strong (but
not overpowering) level. This setting will suit 2-channel Stereo listening as well as Home

Theatre so when dinosaurs, earthquakes and explosions kick-in, they kick in !! Refrain from
turning Volume knob beyond 2 o’clock as Bass will then overpower all other music. Also,
overpowering may incur amplifier damage, Cone damage or both.

Adding extra JENSEN subwoofers: With the purchase of a single 1RCA to

1 RCA lead (from our website) extra EHT-909’s can be “daisy-chained” together to operate as
one. All rooms have acoustic sweet spots as well as dead-spots. Adding an extra EHT-909 will
reduce the dead-spots as well as adding Bass resulting in exponentially enhancing overall Sub­Bass performance. Switch them all to “AUTO” and they will all activate together when an
incoming signal is sensed. Add two, three or as many as you are game.

Warranty. Your EHT-909 is covered under Warranty for 10 Years (amplifier

module 1 Year). It is essential to register On-Line at www.jensenspeakers.com.au / support /

warranty to validate your 10 Year Warranty. JENSEN Warranty database is vaulted
confidential. For Warranty claim, please return this product back to your retailer or take directly
to your closest Service Agent. To find closest Service Agent visit www.jensenspeakers.com.au

/ support / service centres.

Troubleshooting: Electrical storms and Power surges can blow the fuse of your EHT-

909 Subwoofer. Symptom is no LED illumination on front panel (DEAD LED). Fuse holder is
located at bottom of WD-280 amplifier module beside power input. Simply replace this with a

3.15 250V fuse. Most hardware and electrical suppliers will have this standard type of fuse.

From
AMP

Specs:

Description

Power

Output

SPL

Frequency

Response

Driver

Dimensions

Kg Colors

Warranty

Twin 10”

280W High-

Powered

Subwoofer

280

Watt

RMS

BIG !

25-200Hz

Twin
Monster
10” Sub

Drivers

(H) 750

(W) 320

(D) 420/445

26

Kg

Matt

Black

w/Black

Glass Top.

10 Years

P&L

(1 year on

amp)

Notes:

I must not forget to

Register Online

to validate my

10 Year Warranty

www.jensenspeakers.com.au

Customer Support: [e-mail]

1300-JENSEN (1300-536736) www.jensenspeakers.com.au

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under license from Audiovox, USA