Description
HSP2 includes:
- HSP2 Kit includes the SP4.900 amplifier.
- 1 pair of SX 165 NEO coax speakers.
- 1 pair SV 165 NEO woofers.
- Plug & Play HTHP14 T-Power harness.
SP 4.900 Amplifier: A robust four-channel amplifier that boasts cutting-edge Advanced D-Class output stage. Thanks to ADC, it achieves an outstanding 85% efficiency, all while delivering a powerful performance of 160 x 4 WRMS or 500 x 2 WRMS when bridged into a @ 4Ω load. Despite its incredible power, this amplifier maintains an ultra-compact design, measuring just 8.3 x 5.1 inches. For installations with limited space, the SP 4.900 stands out as the perfect option.
With IP55 certification, the SP 4.900 guarantees top-tier defense against moisture, humidity, and dust. Additionally, this model is equipped with a sealed power cord, line inputs, and speaker outputs, ensuring secure power transmission even in the most challenging weather scenarios. Its sturdy power supply harness establishes an ultra-stable power and ground connection, effectively averting any potential loss of contact due to vibrations.
Amp Physical Specifications

| A | 205 mm | 8.07 in |
| B | 211.6 mm | 8.33 in |
| C | 107 mm | 4.212 in |
| D | 130 mm | 5.118 in |
| E | 49 mm | 1.929 |
NEO Speakers: Since their launch in 2020, the Hertz SPL NEO speakers have gained immense popularity. Crafted with motorcycle use in mind, the 6.5″ NEO speakers come with terminals and mounting holes that seamlessly fit Harley-Davidson® motorcycles. These speakers are engineered to deliver remarkable efficiency and boast an impressive capacity to produce booming sound. Among their shared features, the NEO speakers flaunt high-strength pressed paper cones, fortified to withstand water, humidity, and UV exposure. Additionally, they are equipped with a unique Neodymium N38 H magnet that not only enhances performance but also reduces overall weight.
Speaker Highlights
- 2-way car speakers (pair)
- 6-1/2″ pressed paper woofer with weather-resistant treatment
- 1-7/16″ PEI dome tweeter with resettable solid-state tweeter protection circuit
- handles up to 100 watts RMS (200 watts peak power)
- frequency range: 100-20,000 Hz
- sensitivity: 96.5 dB
- top-mount depth: 2-1/4″
- cutout diameter: 5-11/16″
- grilles not included
- warranty: 2 years
Speaker Features
Size Classification Note: Some manufacturers, including Hertz, call this size speaker a 6½”. Because it requires a larger cutout than a standard 6½” speaker,
Tweeters: Each speaker features a 1.4″ PEI (Poly-Ether-Imide) dome tweeter. PEI is a polymer film that produces a wide soundstage for superior imaging.
Power: The power handling specification (100 watts RMS) is given when using a high-pass crossover, 150 Hz and 12 dB/octave.
Speaker Technical Specifications
| Component | SPL COAXIAL |
| Size mm (in.) | 165 (6.5) |
| Power Handling – Continuous W | 100 |
| Power Handling – Peak W | 200 |
| Impedance Ohm | 4 |
| Tweeter diaphragm mm (in.) | PEI |
| Woofer Voice Coil Ø mm (in.) | 38 (1.5) |
| Tweeter Voice Coil Ø mm (in.) | 28 (1.1) |
| Frequency Response Hz | 100 ÷ 20k |
| Woofer Magnet size D x d x h mm (in.) | 70 x 45 x 7 (2.76 x 1.77 x 0.28) |
| Tweeter Magnet size D x h mm (in.) | 19 x 3 (0.75 x 0.12) |
| Weight of one speaker kg (lb.) | 0,94 (2.08) |
| Woofer Magnet | Special Neodymium N38 H |
| Tweeter Magnet | Special Neodymium N38 H |
| Cone | Water repellent pressed paper |
Speaker Electro-Acustic Specifications
| D mm | 128 |
| Re Ohm | 3,3 |
| Fs Hz | 110 |
| Le mH | 0,061 |
| Vas I | 4,92 |
| Mms g | 10,14 |
| Cms mm/N | 0,21 |
| BL T*m | 5,83 |
| Qts | 0,64 |
| Qes | 0,68 |
| Qms | 9,7 |
| Spl dB | 96.5 |
Speaker Physical Specifications

| A | 167,2 mm | 6.58 in. |
| B | 143,3 mm | 5.64 in. |
| C | 69,5 mm | 2.74 in. |
| D | 57,8 mm | 2.28 in. |
Speaker Frequency Response

Woofer Highlights
New SV 165 NEO features compact dimensions and light weight preserving excellent performance thanks to the use of Neodymium N38 H for the motor units. To allow a safe outdoor use without discoloration over time, cones has waterproofing and anti-UV treatment and motor units is painted with cataphoresis with insulated lead-wires to avoid oxidation. The terminals and mounting holes are compatible for installation on Harley-Davidson motorbikes!
Woofer Features
- Compact dimensions and light weight preserving excellent performance thanks to the use of Neodymium N38 H for the motor units
- Cones waterproofing and anti-UV treatment to allow safe outdoor use without discoloration over time
- Motor units treated with cataphoresis and insulated lead-wires to avoid oxidation
- Terminals and mounting holes compatible for installation on Harley-Davidson motorbikes
Woofer Specifications
| Size mm, in. | 165, 6.5 |
| Peak Power Handling | 400 Watts |
| Continuous Power Handling | 150 Watts |
| Impedance | 4 Ω |
| Frequency Response | 100 ÷ 10k Hz |
| Sensitivity | 97 dB SPL |
| Voice coil Ø mm (in.) | 38.6, 1.5 |
| Magnet | Neodymium |
| Cone / Dome | Water Repellent Pressed Paper |
Woofer Electro-Acustic Specifications
| D mm | 128 |
| Re Ohm | 3.2 |
| Fs Hz | 120 |
| Le mH | 0.06 |
| Vas I | 3.55 |
| Mms g | 14.7 |
| Cms mm/N | 0.15 |
| BL T*m | 6.5 |
| Qts | 0.58 |
| Qes | 0.62 |
| Qms | 8.7 |
| Spl dB | 97 |
Woofer Physical Specifications
| A | 167.2 mm | 6.58 in. |
| B | 143.3 mm | 5.64 in. |
| C | 65.2 mm | 2.57 in. |
| D | 57.1 mm | 2.25 in. |
Woofer Frequency Response

HTHP14 T-Power Harness: The HTHP14 T-Power Harness is designed for use with the SP 4.900 amplifier. It is engineered to simplify the installation process by eliminating the need for any wire cutting. With these harnesses, the installation becomes as easy as Plug and Play.
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