Package Includes: (1) RTB80A 8" 400 Watt Powered Subwoofer Bass Tube + MP3 Input, (1) Rockville RWK81 8 Gauge Complete Amp Installation Wire Kit with 100 % Copper RCA Power & Low-Frequency Performance: The RTB80A packs a focused 8-in woofer in a vented tubular enclosure that delivers punchy, deep bass for cars. Specified 400-Watt Peak / 200-Watt RMS with an integrated amplifier listed at 250-Watt RMS, the tube offers an adjustable low-pass crossover and up to 18 dB boost at 45 Hz for impactful low end across a wide frequency range (30 Hz–200 Hz) while maintaining clarity and control. Installer-Friendly mounting & inputs: RTB80A includes four mounting legs and Velcro straps for secure, non-permanent placement so you can try corner, rear or front loading to tune cabin response. Inputs include speaker-level and RCA line-level as well as an MP3 input for quick playback. Simple power, ground and remote hook-up gets the tube running without custom enclosures or complex wiring; compact 8.75 × 19 in sizing fits most vehicles. Pro wiring kit with low-loss construction: The RWK81 8-AWG installation kit supplies 17' 8-AWG SuperFlex power cable, a 17' 100% copper twisted-pair RCA, 17' speaker lead, 3' ground, gold-plated 60A AGU fuse and holder, 7' split-loom and accessories (ties, ring terminals, butt connectors, spades, grommets). The RCAs use blue/silver twisted-pair in a clear jacket; soft abrasion-proof PVC jacket and low-resistance design simplify installs and improve power transfer. Durable build and tuned enclosure: RTB80A features a molded steel woofer grille, rear aero-vent bass system and aviation-grade tweed cover with embroidered logo for lasting looks. Four steel mounting brackets plus two canvas Velcro straps are included for secure placement; sensitivity is 105 dB and the tube form factor focuses bass pressure from both the woofer face and tuned port. Rockville production testing and QC procedures support consistent, reliable operation. The RTB80A bundle delivers a complete, vehicle-ready bass solution: a compact powered bass tube tuned for punchy, focused low frequencies paired with a robust RWK81 installation kit to simplify wiring and ensure low resistance power delivery. The tube’s vented design and adjustable crossover let you tailor bass response to cabin acoustics without large enclosures.

Installation and integration are straightforward. The kit includes mounting legs and Velcro straps for non-permanent mounting, plus speaker-level and RCA line inputs and an MP3 input for flexible source options. The RWK81 supplies 17' 8-AWG power, 17' 100% copper RCA and a 60A AGU fuse along with routing accessories so installers can complete wiring quickly and cleanly.

Performance highlights include 400-Watt Peak / 200-Watt RMS (with an integrated amplifier listed at 250-Watt RMS), adjustable bass EQ up to 18 dB at 45 Hz, frequency response of 30 Hz–200 Hz, and 105 dB sensitivity. The durable tweed-covered tube, steel grille and mounting hardware make this package suitable for frequent use and experimentation with placement for optimal bass.

Key Specs:
Power: 400-Watt Peak / 200-Watt RMS; integrated amp listed 250-Watt RMS
Woofer: 8-in vented high-power driver
Frequency response: 30 Hz–200 Hz
Sensitivity: 105 dB
Installation kit: RWK81 — 17' 8-AWG power, 17' 100% copper RCA, 60A AGU fuse, split-loom, accessories
Dimensions: 8.75 × 19 in

This bundle is ideal for car audio enthusiasts, installers and DIYers who want substantial, tunable bass without sacrificing cargo space. Paired with the RWK81 wiring kit, it provides a field-ready, low-loss installation path and Rockville’s tested QC for dependable on-road performance.