ADJUSTMENT OF CROSSOVER
The T4 ported subwoofer systems need a lowpass filtered signal
to perform best. Thus you have to select the low-pass crossover
function of the amplifier channels that drive your sub, or activate
the DSP based crossover of your headunit driving the sub line-out.
A filter slope steepness of min. 12dB/oct up to 24dB/oct is recom-
mended. For normal compact type cars an 18dB/oct. lowpass for
the sub channel(s) in combination with 12dB/oct. highpass filtered
channels feeding the satellite speakers will usually render best
phase match on the x-over frequency.
The lowpass and highpass cut off / cut in frequency points should
be set to approx. 80 Hz, in order to test the best connection polarity
of your subwoofer.
Phase optimized connection polarity: The correct and best sounding
polarity for your subwoofer needs to be determined empirically „by
ear“, due to the different sound wave path lenghts by the component
system mounted to the front door and the sub playing in the trunk.
This is carried out by connecting the speaker wire to the plug of the
subwoofer either correctly “in-phase” or with reversed connection
polarity – while the resulting sound needs to be judged sitting on
the drivers seat and with the trunk closed. You can further improve
the phase match of the sub to the satellite speakers, if your amp
features a phase shift control function, or if the headunit deploys a
DSP offering time alignment of sat/sub channels.
Once you have found the correct or better sounding connection
polarity of your sub, you can re-mount the top of the terminal
plug.
The final adjustments now center around the lowpass crossover
frequency point and input level gain of the amp channels driving
the subwoofer. In general, the lowpass crossover frequency should
be set in between 65 to 90 Hz.
Note: Selecting a very low crossover frequency (<70Hz) will give
you soft and infra-bass heavy sound, whereas setting the x-over
frequency too high tends to let you end up with an „over-booming“
sound character lacking low end extension.
Congratulations on your purchase of this EMPHASER X-Treme T4
ported trunk box subwoofer system.
Before you put this subwoofer in your trunk and fire it up, please
read the manual and all operating and adjustment instructions
given, to obtain best possible sound quality and full performance.
This X-Treme T4 trunk box subwoofer model follows the ported
enclosure tuning principle, with some special features implemented
in the construction as listed below:
TECHNICAL KEY FEATURES
■ Loaded with EX10T4 / EX12T4 / EX15T4 subwoofer
■ Optimized for midbass impact and SPL
■ Cabinet made of solid MDF wood
■ Large cross section slot port design
■ EMPHASER quick-connect terminal
■ PU-foam inner damping for best sonics
BOX LOCATION & GENERAL INFO
The X-Treme T4 trunk box sub models are designed and acoustically
optimized for deployment in the trunk of hatchback or sedan type
vehicles.
The EMPHASER „Safety Terminal“ provides straightforward and
simple connection of this subwoofermodel, or a quick removal of
it when necessary. Accidential reverse polarity connections are
avoided by the special shape of the plug and the receptor cup, that
fit together like a key in a lock. The slot port enclosure design enab-
les the T4 woofer to perform as intended, i.e. sustaining exceptio-
nally high undistorted and port noise free bass output levels.
CONNECTION TO THE AMP
Remove the top part of the speaker plug. Connect the speaker wires
coming from the amp to the terminal binding posts located inside
the main terminal housing. Do not remount the top of the plug yet,
as the correct connection polarity of the speaker cable connecting
the sub to the amp must be determined first, to obtain in phase
response between subwoofer and satellite speakers.
TECHNICAL SPECIFICATIONS EBR110T4 EBR112T4 EBR115T4
Peak input power: 1400 W 2300 W 2800 W
Continuous input power: 700 W 1000 W 1000 W
Sensitivity (1W/1m): 90 dB 92 dB 94 dB
Frequency response (-3dB in car): 35 – 85 Hz 30 – 85 Hz 30 – 85 Hz
Nominal impedance: 4 Ohms 4 Ohms 4 Ohms
Dimensions (WxDxH mm): 520 x 380 x 320 582 x 440 x 395 675 x 480 x 458
- Technical construction and specifications subject to changes without notice -
