HSD Sound Systems · Subwoofer

HSD Eagle

Name: HSD Sound Systems Eagle
Brand: HSD Sound Systems
SKU: 18FLH30
Price: 5500.00 USD
Availability: InStock

Model 18FLH30

Cluster-optimized 18-inch FLH sub with deep, efficient extension.

The Eagle is an 18" front-loaded horn subwoofer engineered for deep bass reproduction with efficiency and precision. Designed for optimal performance in clustered configurations, it delivers exceptional low-frequency extension down to 29 Hz and serious impact, making it ideal for high-output live sound applications. Hand-built by Hennessey Sound Design in Massachusetts, and backed by a 5-year limited warranty.

$5,500 retail

Built to order. Quote includes freight, system design, and current lead time.

Request Quote Call 210.489.0492

Most quotes sent same business day. Real people, no scripts.

HSD Sound Systems Eagle subwoofer by Hennessey Sound Design

Amplification

Passive cabinet, amplification required

The Eagle presents 8 ohms nominal and handles 1,500 W continuous. Two in parallel (4 ohms, 3,000 W) match one 3,500 W channel of a KD Series 4-14KD.

1 amp channelper cabinet, 8Ω nominal

Driver

1×18″front-loaded horn

Response

29Hzto 150 Hz (-3 dB); 26 Hz at -10 dB

Power

1,500Wcontinuous (3,000 W program)

Weight

265 lbs22.5″ W × 48″ H × 45″ D

Full specifications

HSD Eagle (18FLH30) specs

Factory specifications from Hennessey Sound Design. Download the cut sheet for drawings and driver details.

Frequency Response	29 Hz - 150 Hz (-3 dB); 26 Hz - 250 Hz (-10 dB)
Sensitivity	105 dB (1W/1m)
Drivers	1 x 18" (front-loaded horn)
Power Handling	1,500 W continuous (3,000 W program)
Impedance	8 ohms nominal
Dimensions	22.5" W x 48" H x 45" D
Weight	265 lbs
Connectors	2 x NL4

HSD Eagle cut sheet (PDF)

Why buy from Fullblast

An HSD system is a build, not a box. We manage the whole thing.

Authorized HSD dealer

Fullblast Sound is one of only three authorized HSD Sound Systems dealers in the United States. Factory pricing, factory support, and a direct line to the Massachusetts shop on every order.

Real dealer support

We spec the system against your room and application, handle freight and logistics, and stay on call after delivery. Talk to us before you order and we will get the design right the first time.

Nationwide freight

Every HSD cabinet ships crated freight from the factory. We quote and coordinate delivery to your dock or venue anywhere in the country as part of the system price.

Financing available

Spread an HSD system across payments instead of a single check. See financing options or ask for terms with your quote.

Get a real quote

Send a system spec, not a price shopping number

Tell us the room, the audience size, and what you run today. We come back with the right HSD build, amplification, freight, and current factory lead time. One short form.

Request Quote Or call 210.489.0492

Same business day response.

Buyer research

Questions buyers ask about the Eagle

Common pre-purchase questions on the HSD Eagle.

What does 'cluster-optimized' mean on the Eagle?

The cabinet is designed for its best performance in grouped deployments: at 22.5 inches wide and 48 tall, Eagles rack side-by-side into tight, efficient blocks whose horn mouths couple, gaining low-frequency directivity and headroom as the cluster grows. One Eagle is a good sub; four Eagles are a disproportionately great one.

What amplifier drives the Eagle?

1,500 W continuous (3,000 W program) at 8 ohms nominal. Two Eagles in parallel present 4 ohms and 3,000 W combined, matched almost exactly by one 3,500 W channel of the HSD KD Series 4-14KD. A single 2U 4-14KD runs an eight-Eagle wall.

Eagle or Switchback?

Both are single-18 FLH subs; the split is depth versus portability. The Eagle digs to 29 Hz (-3 dB) with 1,500 W handling in a taller 265 lb cabinet built for clustering. The Switchback gives up a few Hz (32 Hz) and 500 W to weigh 90 lbs less and pack flatter. Touring rigs that trailer their gear lean Switchback; installs and cluster builds lean Eagle.

What are HSD's build terms?

Every Eagle is built to order in Massachusetts, with lead times typically around 90 days. It carries a 5-year limited warranty, and free factory training is included when your system is done. We will walk you through ordering and payment when we quote your system.

System design