Alphasonik NS683 6x8/5x7 3-Way Car Speakers

The Alphasonik NS683 is a pair of 3-way full-range car speakers designed to deliver clear midrange, crisp highs from a PEI dome tweeter, and reliable bass in a compact 6x8 / 5x7 footprint.

If you need a budget-friendly upgrade that balances clarity and volume without reshaping your vehicle’s openings, the NS683 offers a practical solution. These speakers combine a polypropylene cone, rubber surround, and a stamped-steel basket with a built-in crossover to manage frequencies between the woofer, midrange, and PEI dome tweeter. Their compact profile and included hardware make them a straightforward swap for many factory locations.

How much power can the NS683 handle and what does that mean?

Each speaker handles up to 180 watts peak (360 watts for the pair) with a continuous (RMS) rating of 60 watts per speaker. Peak power indicates short bursts of maximum output, while RMS gives a realistic expectation for sustained listening levels. Match the speakers to an appropriate head unit or amplifier to avoid distortion and protect components.

• Peak power: 180W per speaker, 360W per pair
• RMS: 60W per speaker for steady playback
• Impedance: 3 ohms—ensure amplifier compatibility

What sound range and sensitivity should I expect from these speakers?

The NS683 covers a frequency range from approximately 51 Hz up to 20 kHz, so they handle low-mids through high frequencies. A sensitivity rating of 86 dB means they reach good volume with moderate power, though very low bass will be limited by the small woofer size. For fuller low-end, pair them with a subwoofer or use an amp with headroom.

• Frequency response: 51 Hz – 20 kHz for broad coverage
• Sensitivity: 86 dB for efficient sound at common head-unit power
• Best paired with a sub for deep bass extension

How are these speakers built and what hardware is included?

The NS683 uses a polypropylene cone and rubber surround in a stamped-steel basket, with a PEI dome tweeter for detailed highs and an integrated crossover to direct frequencies. The package includes two speakers plus wiring and mounting accessories to simplify installation. The relatively shallow mounting depth helps fit these into tighter factory locations.

• Materials: polypropylene cone, rubber surround, PEI dome tweeter
• Included: (2) speakers, speaker wires, 8 screws, 8 speed clips, manual
• Dimensions: mounting depth 2.6", overall 5.63" x 9.01", height 2.72"

Will the NS683 fit my car and how hard is installation?

The NS683 is designed for vehicles that accept 6x8 or 5x7 speakers and its shallow depth makes it suitable where space is limited. Included screws, speed clips, and wiring make the swap approachable for DIYers familiar with basic car audio work. Still, double-check hole patterns and grille clearance before cutting or modifying factory panels.

• Mounting depth: 2.6" for many shallow locations
• Overall diameter: 5.63" x 9.01" — check vehicle openings
• Installation aided by included hardware and manual

Who this is for: Drivers seeking an affordable, full-range speaker upgrade that improves clarity and high-frequency detail without a deep mount or extensive system changes. The NS683 suits daily commuters, budget-conscious audiophiles wanting better mids and highs, and anyone planning to add a separate subwoofer later for stronger bass.