Boom Stage 1 – Comes mostly on bikes with factory tour pack speakers, you will have a total of 4 speakers and 1 amplifier. You will also be able to tell by the speakers only having one positive and one negative connection. Having Boom Stage 1 you can change only the amplifier and leave the factory speakers.
Boom Stage 2 – Comes mostly on bikes with factory saddlebag speakers, there will normally be a total of 6 speakers (uppers, lowers and saddlebag) with 3 amplifiers or 4 speakers (uppers and saddlebag) with 2 amplifiers. Each speaker will also have a total of 4 connections; the tweeter and the woofer are both wired to the amplifiers with separate connections. Having Boom Stage 2 you will have to change the amplifier and the speakers at the same time.
This Volunteer Audio Boom Stage 2 plug & play amplifier and speaker package includes the prewired amp, SoundStream HDHU.14Si Radio, 1 set of 6.5″ SX165NEO speakers with a set of Hertz HSGSG replacement grilles to replace your factory front fairing, 1 set of 6×9″ SX690NEO speakers with American Hardbag adapters for your lid speakers. All necessary wiring is included in the package, you will not need any other wiring or hardware to complete this installation.
The American Hardbag adapters included in this package are for Harley Davidson® motorycycles WITH power lid locks.
HDHU.14si model lets you gain/retain factory features you’d otherwise lose when installing a different headunit. Check out your hog’s Engine Performance and Monitor Data such as; Tire Pressure, Battery Voltage, Dual-Function Handlebar Controls, Track Pack Gauges, and the ability to turn on Factory Amplifiers for CVO, Boom 1, and Boom 2 Systems.
External Module Required for HDHU.14si
-Handlebar Controls Interface Read
-Plug & Play Wiring harness
-IPx5 Waterproof Faceplate
-4-Volt RCA Audio Output
Totally new NEO SPL coaxial SX 165 NEO cone is made with nature-proof high stiffness pressed-paper featuring innovative water/humidity resistant and anti-UV treatments. The double layer copper voice coil, wound on polyamide former ensures unparalleled power handling. New motors units are made of special Neodymium N38 H to obtain a minimum bulk and increased performance. SX 165 NEO features a large Hi-SPL 1.4” PEI dome tweeter with resettable solid-state protection circuit and a protective rubber gasket for high SPL and a safe outdoor use.
SX 690 is a real beast with an Hi-SPL Mid-Hi unit based on 1.4” dome tweeter and 1” dome supertweeter with resettable solid-state protection circuit. Cone are made with nature-proof high stiffness pressed-paper featuring innovative water/humidity resistant and anti-UV treatments. The double layer copper voice coil, wound on polyamide former ensures unparalleled power handling. New motors units are made of special Neodymium N38 H to obtain a minimum bulk and increased performance.
SP 4.900 is the first Hertz amplifier featuring the renewed Hertz ADC (Advanced D-Class) output stage, reaching up to 85% efficiency and delivering an impressive power rating of 160 x 4 (4Ω) W RMS or 500 W x 2 (4Ω) W RMS when bridged, with an ultra-compact size of 211.6 (8.3) x 130 (5.1) mm (in.). Being ultra-compact with an impressive power, SP 4.900 is the ideal choice for Motorcycle application.
Hertz ADC technology ensures SP 4.900 overtakes the usual ultra-compact amplifier performances, delivering an outstanding 105 dBA S/N Ratio and 0.02% THD specifications, and almost completely eliminating EMI and RFI noise, for peerless sound quality.
ATOM MINI amplifiers adopt the most exemplary Korean Class-D performance, reliability, and this compact footprint fits inside your motorcycle’s fairing. At first glance, you’ll notice several key improvements. All pre-amp & crossover options are conveniently located on one side of this amplifier, while quick-disconnect connection plugs for power and speakers outputs are on the other. You might not notice additions to the circuit board, including improved internal power supply & output stage components. We know you want it loud…
State-of-the-Art Class D IC Amplifier Technology
2-Ohm Stereo & 4-ohm Bridged Stable Amplifier
Quick Disconnect 8g Power & 14g Speaker Wire Harness
200mV-6V Low-Level RCA Input Harnesses Included
Signal Sensing Turn-On on Hi/Speaker Level Input
Optional Variable 12dB/Octave High-Pass Crossovers
Optional Variable 12dB/Octave Low-Pass / Band-Pass Crossover
Low-Level RCA Output Harness for Daisy Chained Applications
• 2014-2023 Harley-Davidson Street Glide :
• 2014-2023 Harley-Davidson Ultra Glide :
• 2014-2023 Harley-Davidson Electra Glide :