HUSH AUDIO LF-12BP User manual

MODEL: LF12BP
Product manual
05/19

1: Introduction
Thank you for your purchase of the LF12BP bass loudspeaker, which has been designed
and engineered to provide many years of reliable service when correctly installed within
an audio system
The LF12BP is shipped in a heavy-duty double-walled cardboard packing container,
which provides a good level of transit protection
Upon unpacking please inspect the loudspeaker for any signs of transit damage, and in
the unlikely event of this happening inform your Hush Audio dealer immediately Claims
for damage must be made to the shipping company within 2 days of receiving the
product
The LF12BP has been developed to provide effective low frequency support within an
audio system whilst maintaining a compact format Its dual bandpass design provides
high efficiency over a specific frequency range
It can be used in singles to augment bass output in a background music system or in
multiples for higher output audio systems
Constructed from 18mm birch plywood, the LF12BP includes a robust low frequency 12”
drive unit featuring a 3” CCAW voice coil

2: Correct installation and operating procedure
•The LF12BP is designed for floor mounting, however it can also be flown using 4 x M
forged eyebolts. If flying, please ensure that the all fixings and supports have the
correct weight loading parameters.
•Only install the loudspeaker indoors in a dry environment.
•Observe the maximum power rating and recommendations shown within the
specifications (see section 5 & 6).
•This loudspeaker is designed to reinforce bass response within installed music systems.
3: Suggested installation positioning
The positioning of a subwoofer within a room can have a dramatic effect on its output level
and following table describes potential output level with regards to this.
In a corner Maximum output
Against a wall Medium output
In the middle of the room Lower output
Flown suspended in the middle of the room Lowest output
Whilst it might be preferential to get the maximum output from the subwoofer, depending
on the room layout phase cancellation may occur culminating in an uneven response, so
some trial positioning may be required.
Suggested installation cable
The choice of installation cable can have quite an effect on a loudspeaker’s performance
and the overall performance of the audio system. Cable type and diameter should be
taken into account to ensure that the loudspeaker performs to its best and that power is not
lost in the system.
A good quality copper cable should be used to install the LF12BP and the thicker the better.
Suggested diameters of cable v distance are shown in the list below
Distance
Up to 20m At least 2.5mm diameter per core
20m to 50m At least 4mm diameter per core

The loudspeaker features two NL4 four pole
Neutrik Speakon ™ sockets
These two connectors are paralleled together
and allow for linking to an additional
loudspeaker
Each Speakon ™ is wired in the following manner;
+1 positive input from amplifier
-1 negative input from amplifier
Please observe polarity especially if multiple loudspeakers are installed on the system
5: Specifications of LF12BP
Model number LF12BP
Type Subwoofer
Components 1 x 12”
Maximum power input 400w AES (using a recommend DSP settings)
Frequency response 50 Hz to 300Hz (+/- 6dB) (requires High and Low pass
filtering for correct operation)
Nominal impedance 8 ohms
Relative sensitivity at 1m 97dB with 1w(2 83v) input
Maximum SPL continuous 123dB
Dispersion N/A
Dimensions 500w – 380h – 400d (mm)
Fixings 4 x M8 flying points (rear of the ca inet)
Nett weight 20 kgs
All specifications are su ject to change without notice E&OE
6: Configuring the LF12BP for use with DSP amp ifier based systems
The LF12BP must be used with a system employing Digital Signal Processing, primarily to
protect the loudspeaker and secondary to ensure optimum performance from the audio
system
We recommend that the following minimum processing be used,
•Depending on the program material, a high pass filter set at 40 to 45Hz with a slope of
24dB/octave
•Low pass filter set at 120Hz or below with a slope of 24dB/octave
•Maximum input power 400w AES

7: Terms of warranty
This product is guaranteed from defects under normal use for a period of 3 years from the
date of purchase.
This guarantee will be void if:
•The loudspeaker has been overdriven by excessive power or low frequency input.
•The loudspeaker has been dropped or damaged by collision or misuse.
•The loudspeaker has been installed within a damp environment.
•The loudspeaker has been used for other than intended purposes.
8: Service
In the unlikely event of the failure of this loudspeaker, it should be returned via the dealer
who it was purchased from. They will then contact their local Hush Audio service centre. This
unit contains no user serviceable parts.
Please keep this manual with the documentation for the system
Installation address
Serial number(s) of LF12BP
Installation date
NOTES

Printed y Hush Audio, England © 2019