Why the L-Acoustics KS28 Remains a Rider Favorite

The L-Acoustics KS28 is a dual-18-inch high-power subwoofer designed for large-scale touring and fixed installations. It delivers deep, controlled low-end with exceptional headroom, making it a staple on technical riders for major artists and events. For rental companies and venues, owning KS28s means you can meet rider requirements without paying new-unit prices.

Key Specs and Typical Applications

The KS28 is a bass-reflex subwoofer with a frequency range of 25 Hz to 100 Hz. It is typically deployed in arrays or as a standalone subwoofer for EDM, rock, and pop concerts, as well as in nightclubs and large auditoriums. Its cardioid capability (when properly configured) helps control low-frequency dispersion, reducing stage noise.

Common setups include:

  • Ground-stacked or flown subwoofer arrays for touring
  • In-fill or side-fill sub support in large venues
  • Fixed installation in clubs and performing arts centers

Why Buy Used Instead of New?

New L-Acoustics KS28 units come with a premium price tag and long lead times. The used market offers significant savings—often 30–50% off list—without sacrificing performance, provided the units are tested and maintained. Acoustrade specializes in tested used pro-audio gear, including L-Acoustics subwoofers, line arrays, amplifiers, and more. Every KS28 we sell is inspected, tested, and backed by a warranty.

What to Check When Buying Used KS28

Before purchasing, verify:

  • Cone condition and surround integrity
  • Voice coil DC resistance (should be within spec)
  • Cabinet integrity (no cracks, water damage, or deep scratches)
  • Grille and connector condition
  • History of use (touring vs. installation)

Acoustrade provides test reports and detailed photos for each unit. We also offer global shipping and technical support to help you integrate the subwoofers into your existing L-Acoustics system.

Pricing and Availability

Used L-Acoustics KS28 pricing varies based on condition, age, and quantity. Expect to pay between $4,000 and $6,500 per unit for tested, good-condition units. Bulk purchases may qualify for additional discounts. Contact Acoustrade for current stock and a personalized quote.

FAQ

Q: Are used L-Acoustics KS28 subwoofers reliable?
A: Yes, when sourced from a reputable dealer. Acoustrade tests each unit and provides a warranty, so you can buy with confidence.

Q: Can I use KS28 with other L-Acoustics speakers?
A: Absolutely. The KS28 is designed to work seamlessly with L-Acoustics K1, K2, Kara, and other systems. Ensure proper amplification and processing.

Q: What is the typical lead time for used KS28?
A: Availability varies. Acoustrade maintains a rotating stock; contact us for current lead times, which are often shorter than new orders.

Q: Do you ship internationally?
A: Yes, Acoustrade ships worldwide. We handle logistics and customs documentation to make the process smooth.

Q: Is a warranty included?
A: Yes, all used L-Acoustics KS28 subwoofers from Acoustrade come with a standard warranty covering functional defects.