OWNER’S MANUAL
Enclosures
There are two main types of enclosure to choose from when installing the TL-1121; sealed
or ported.
Sealed enclosure (See fig. 5 below).
A sealed enclosure gives a “tighter”, more “punchy” response, over the whole bass region.
This is recommended for every-day listening as it works well with most types of music.
This enclosure design gives best overall frequency response and certainly is recommended
for users preferring SQ (sound quality) to SPL (sound pressure level).
Ported Enclosure (See fig. 6 below).
A ported enclosure gives significantly more SPL, however, this is concentrated on a smaller
band of bass frequencies. This is recommended for SPL competitions and for music genres
such as rap, hip-hop, r&b, drum&bass, or other bass-heavy music.
TheLoudest.com manufacture a black vinyl covered enclosure, “Competition Pro TL-1120”.
This has been designed and fine tuned to the TL-1121 subwoofer in order to achieve the
best SPL and SQ. The TL-1120 is the first production enclosure that has a removable plug
over the port. This revolutionary feature allows the user to swap between sealed design and
ported design. For every-day listening, the plug can be installed, so the sealed enclosure
design is utilised, and for SPL competitions, the plug can be removed.
Other features of the tailor-made TL-1120 include the extended design, allowing enough
mounting depth for the woofer, and the unit being substantially re-enforced to allow the
mounting of the heavy TL-1121 subwoofer either facing in towards the enclosure, or inside
the enclosure facing out.
Constructing a custom enclosure for the TL-1121 subwoofer is only recommended for
seasoned professionals.
If this is the case, the minimum sealed enclosure volume should be 1.2 ft³ with the
recommended sealed enclosure volume being 2.2 ft³.
The minimum ported enclosure volume should be 1.5 ft³, with the recommended ported
enclosure volume being 2.2 ft³.
Installing the TL-1121 into an enclosure that is smaller than the minimum volumes specified
means that subwoofer will not work to its full potential and can be placed under a lot of
stress which could result in permanent damage.
The TL-1121 subwoofer can be installed as part of club/pa systems by professionals.
Fig. 6 – The TL-1121 subwoofer installed in a
ported enclosure.
Fig. 5 – The TL-1121 subwoofer installed in a
sealed enclosure.
OWNER’S MANUAL
When connecting two TL-1121 subwoofers together, the user/installer can connect the
subwoofers to an amplifier in either of the following two ways:
1.
Parallel-Series (See fig. 3 below).
- Connect the negative terminal of the amplifier to the negative terminal of the left
voice coil of each subwoofer.
- Connect the positive terminal of the amplifier to the positive terminal of the right
voice coil of each subwoofer.
- For each woofer, connect the positive terminal of the left voice coil to the negative
terminal of the right voice coil.
2.
Series-Parallel (See fig. 4 below).
- Connect the negative terminal of the amplifier to both the negative terminals of the
first subwoofer.
- Connect the positive terminal of the amplifier to both the positive terminals of the
second subwoofer.
- Connect the positive terminals of the first woofer together.
- Connect the negative terminals of the second woofer together.
- Connect the two above connections to each other.
Connecting two TL-1121 subwoofers to an amplifier in either of the above two methods
gives a load of 2 ohm to the amplifier. The recommended way to do this is to use two
Competition Pro TL-1023 Class D Monoblock Subwoofer Amplifiers (6,000w max and 2,000w
RMS @ 2 ohm when combined in bridge mode). The only difference between the above two
methods is the way in which they are connected, simply choose which one can be most
easily implemented in your situation.
If mounting the woofers outside the enclosures, pointing in, the connections can be made
straight to the amplifier. If mounting the woofers inside the enclosures, the connections will
be made via the terminal block on the side of the enclosure. With either method of
mounting, it is recommended that the terminal blocks on the side of the enclosure are
utilised to make the connection to the amplifier easier. Please refer to the manual supplied
with the enclosures for further information on connecting the amplifier to the subwoofers
through the terminal blocks on the side of the enclosure.
Fig. 4 – Two TL-1121 subwoofers connected in
series-parallel, giving 2 ohm load to amplifier.
Two TL-1023 amplifiers are recommended.
Fig. 3 – Two TL-1121 subwoofers connected in
parallel-series, giving 2 ohm load to amplifier.
Two TL-1023 amplifiers are recommended.
