CHOICE OF PLUG-IN BOOM MICROPHONES
(Part 12, 13, 14 & 15)
Your supplier should help you decide which boom/s you need. (See page 8 for installation tips)
Part 12
(Boom SPB-UB1) is our most universal boom. Suitable for most full face, open face and flip front helmets.
Part 13
(Boom SPB-LB) is similar to our part 12 but is slightly longer for some open face or very large helmets.
Part 14
(Boom SPB-FF) is a short boom designed to Velcro into the helmets chin bar (Front Fit) This is sometimes
useful in some flip front helmets and some full face helmets, but not normally suitable for open face helmets.
Part 15
(Boom SPB-BMW4) is exactly the same as part 12.
These booms MUST have an optional part 43
(OFCK) fitted if used in an open face helmet. See page 7.
Replacement (consumable) foam speaker covers (Part 40) are available from your dealer. If your helmet has deep
ear indentations and you need to pack your speakers out our optional Foam Speaker Pads, Part 45 (1/4”) & Part 46
(1/2”) are available from your dealer.
It is very important to set up and use the microphone correctly. The Microphone has, what we call a critical LOUD
SPOT. The system is tuned to this loud spot and so it is important that you understand and use it properly. Not using
the loud spot will reduce sound considerably. Testing the system before installation will help you to find and use the
loud spot. The best way to do this is by holding the microphone against your lips, dead centre, and powering your
voice through it, as if to someone 15-20 feet away. Listen to the receiving headset and you will hear how important it
is to position and use the microphone correctly. The correct position is where it sounds the loudest
(the loud spot).
Top tips
The loud spot is the position of the microphone relative to your lips and the way you shape your mouth when talking
into the microphone. Pucker your lips when talking, as if kissing the microphone, and then carefully move the
microphone about, while talking or making a continuous tone, to find the point where your voice is the loudest. This is
the microphone loud spot that the systems are tuned to.
Wherever possible you should try to fit the boom 12, as shown in the illustrations, behind the cheek pad. Where it is
not possible to do this, you may have to consider boom 13. Ask your supplier for more advice.
Page 3
Microphone positioning is critical
C O R R E C T M IC R O P H O N E
P O S IT IO N
IN C O R R E C T M IC R O P H O N E
P O S IT IO N
Recommended speaker positioning for maximum performance & comfort
Centre of ear
hole
Centre of
speaker
Avoid speaker near top of
ear
NOTE that wire normally
comes out towards back
Centre of ear
hole
Centre of
speaker
Centre of
ear hole
Centre of
speaker
BMW SYSTEM 4 Helmet Instalation
Remove neck collar by pulling the back of the collar away from the helmet and slide both side guides out from
retaining locators. Detatch velcroed flaps (Marked ‘A’ below) to expose the polystyrene ear cups. Thread boom
(Microphone first) under the chin strap but over the opened velcroed flaps(A). Locate speakers just below the
polystyrene ear indents under the velcroed flaps (B). Neatly tuck speaker cable under lining around the back of the
helmet and below the neck collar retaining groove, out of sight (C). Position headset down lead along the outer egde
of the helmet under the velcroed flap. This may require addition velcro to ensure security. Close the velcroed flaps
and tidy
Push the thin section of boom into the joint between the skull and cheek lining, under the chin strap. Locate the
boom across the top of left hand cheek pad forming it to follow it’s contours. Hold boom down firmly and secure in
place with velcro pad supplied (D). Form boom so that microphone is situated in-front of and just touching the center
of your mouth. Check that down lead and boom are well secured and wires are tidily tucked away. CAREFULLY
check the opening and closing of the front of the helmet does not snag the boom or down lead. Test the headset and
reposition microphone and speakers if required. Refit neck collar. Please note that due to the design of this helmet,
positioning of the speakers is limited and as such it may not be possible to position the speakers directly in line with
your ears. If this is the case one cannot expect the sound to be good when using earplugs.
Viewed from underside
of Helmet with chin bar
open and neck collar
removed
Pass boom
assembly under
flap in direction of
arrow
Fit speakers in the ear pockets
under the Velcroed flaps.
Tuck speaker wire away around the back of the
lining underneath the groove for the neck collar
The boom is tucked tight
into groove above the cheek
pad and under the chinstrap
mounting
Align boom across the
top of the cheek pad
and hold secure with
Velcro provided
Step 1
Step 2
Step 3
A
A
B
B
D
A A
C
Page 6
