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HK Audio LINEAR 9 118 Sub A 18" Active Subwoofer front view

HK Audio LINEAR 9 118 Sub A 18" Active Subwoofer

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$3,499.00
$2,899.00
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Description

HK Audio LINEAR 9 118 Sub A

HK Audio LINEAR 9 118 Sub A 1100W amplification and bass-reflex design

1100W Class-D Power In Efficient Bass-Reflex Design

The 1100W RMS Class-D amplifier drives the 18-inch woofer with 4-inch voice coil to 131dB peak SPL, providing enough output for mid-sized venue systems and touring applications. The bass-reflex tuning optimizes efficiency in the 42-100Hz range, allowing the cabinet to produce high SPL without requiring excessive amplifier power or massive enclosure volume. Frequency response extends to 38Hz at -10dB, covering the fundamental bass range for electronic music, kick drums, and bass guitar without rolling off prematurely. The compact 21.7" x 22.1" x 27.2" dimensions and 91.5-pound weight make single-person transport practical, while the birch multiplex construction with PU coating maintains structural integrity through repeated gigging. The bass-reflex port tuning focuses on controlled output rather than excessive boom, so low-frequency content maintains definition instead of turning into indistinct rumble. 

 LINEAR 9 118 Sub A front-panel cardioid presets and direct access

Front-Panel Cardioid Presets Simplify Directional Arrays

Direct access to cardioid 1:1 and 2:1 presets via front-panel controls eliminates the laptop-and-network requirement for quick directional bass setups. The 1:1 cardioid mode uses two subs—one forward-firing, one rear-firing with phase-delayed signal—to create front-focused bass patterns that reduce stage wash and rear reflections. The 2:1 mode uses two forward subs and one rear sub for asymmetrical cardioid patterns with greater front-to-back rejection. These presets automatically generate the correct phase relationships and delay timing, so you're deploying cardioid arrays without calculating milliseconds or worrying about polarity mistakes. The dedicated DSP output provides the processed signal for feeding rear-firing subs or integrating non-networked speakers into controlled systems. This becomes critical when you need cardioid coverage but don't have matching network-capable subwoofers, or when integrating the LINEAR 9 into existing systems with mixed speaker types.

 HK Audio 118 Sub A networked DSP control and 96kHz processing

Network-Controllable DSP With Professional Processing

Ethercon RJ45 connectivity (in/thru) enables remote control via HK Audio's DSP CONTROL software for Windows and macOS. The onboard DSP platform runs at 96kHz sample rate with less than 2.6ms system latency—low enough for live performance where timing between subs and tops matters. Fully parametric 10-band EQ with variable filter characteristics provides surgical control over room modes and system tuning, while independent low-pass filtering, polarity control, level adjustment, delay (for time-alignment), and limiting protect the driver and optimize system response. The stereo preamplifier maintains separate left and right channels, supporting true stereo 2.1 configurations rather than forcing mono summation at the sub. This matters in installed systems or DJ applications where maintaining stereo imaging through the low frequencies preserves spatial information. PowerCon NAC3 in/thru connections simplify power distribution across multi-sub arrays, and the lockable connectors prevent accidental disconnection during shows. Made in Germany with attention to component quality and construction standards, the LINEAR 9 118 Sub A delivers reliable performance in professional touring and rental applications.

Highlights

  • 1100W RMS Class-D amplifier drives 18-inch woofer with 4-inch voice coil to 131dB peak SPL
  • Bass-reflex design extends response to 38Hz (-10dB) in compact 91.5-pound enclosure
  • Front-panel access to cardioid 1:1 and 2:1 presets for quick directional bass deployment
  • Network-controllable DSP (96kHz, <2.6ms latency) with 10-band parametric EQ and comprehensive processing
  • Dedicated DSP output integrates non-networked speakers and provides processed signal for cardioid arrays
  • Stereo preamplifier maintains separate L/R channels for true 2.1 system configurations
  • Birch multiplex construction with PU coating and lockable PowerCon/Ethercon connections

Technical Specifications

Specification Details
Max. SPL @ 10% THD 129 dB half space (42 Hz – 100 Hz averaged)
Max. SPL Peak @ 10% THD 131 dB half space
Frequency Response (+/- 3 dB) 42 Hz – X-over
Frequency Response (-10 dB) 38 Hz – X-over
Power Amp Output (RMS) 1100 W
Amp Type Class D
LF Driver 1x 18", 4" voice coil
Maximum Input Level +20 dBu
Analog Inputs 2x XLR combo balanced
Analog Thru 2x XLR balanced
DSP Out 1x XLR balanced
Network Port Ethercon RJ45, 1x In, 1x Thru
Filter Presets Front, Cardioid 1:1, Cardioid 2:1, Remote
Remote Software DSP CONTROL (Windows, macOS)
DSP Functions Fully parametric 10-band EQ, Low-Pass Filter, Polarity, Level, Delay, Limiter, Mute
Sample Rate 96 kHz
System Latency < 2.6 ms
Mains Connector 1x Powercon NAC3 In, 1x Powercon NAC3 Thru, 100–240 V
Power Consumption 1.9 A / 100–240 V nominal (EN 62368-1)
Pole Mount 1x M20
Carrying Handles 2x MultiGrip
Housing Birch multiplex
Finish PU coating black
Front Grille 2 mm metal grille backed with black acoustic foam
Dimensions (W x H x D) 21.7" x 22.1" x 27.2" (55 x 56 x 69 cm)
Weight 91.5 lbs (41.5 kg)
Manufacturing Made in Germany

What's in the Box

Included Items
HK Audio LINEAR 9 118 Sub A
Power Cable
Manual
Shipping

Shipping & Returns

  • We deliver all US orders in 3–5 business days
  • Free cancellations
  • Returns accepted within 30 days (unused items)

Order Confirmation

Once your order is placed, you will receive an order confirmation email. This confirms that we have received your order and have pre-authorized your credit card for the purchase. After confirming availability with our suppliers, we will proceed accordingly:

  • If your item is available and ready to ship within 1–2 business days, we will process the charge and arrange for shipment.

  • If your item is on backorder or unavailable, the pre-authorization will be voided and you will be notified by email.

  • Please note: While most items ship out within 1–2 business days, total delivery time is typically 3–5 business days, depending on your location and carrier handling.

Order Shipment

If your item is in stock and your payment has been processed, your order will typically ship within 1–2 business days. Total delivery time is approximately 3–5 business days from the date of order. Once shipped, you will receive tracking information at the email address provided during checkout within 24 hours of dispatch.

If you have not received tracking information within 3–5 business days of placing your order, please contact us at support@proaudioreserve.com.

The Distributor-Direct Advantage

To ensure you receive the most recent hardware revisions and 100% factory-sealed units, Pro Audio Reserve utilizes a Distributor-Direct fulfillment model. Unlike big-box retailers that may ship "floor models" or gear that has been sitting in general-purpose warehouses, your equipment is pulled directly from the primary manufacturer hub, serialized, and dispatched. This process ensures the highest level of quality control for professional-grade recording equipment.

Shipping Policy

We currently offer free shipping within the United States only. If the checkout process on our website allows you to enter a shipping address and complete your order, your location is eligible to receive delivery.

Changing Shipping Address

If you need to change your shipping address after your order has been processed or shipped, we will do our best to accommodate the request. Please note that address changes may result in delivery delays. Any additional costs incurred due to address changes, including carrier fees or rerouting charges will be the responsibility of the customer. No exceptions.

Shipping Times

All shipping times provided are estimates and should not be considered guarantees. Most orders ship out within 1–2 business days from the time payment is processed. However, total delivery time is typically 3–5 business days, depending on your location, carrier performance, and supplier fulfillment timelines.

We work closely with our vendors to ensure timely deliveries, but please note that supply chain disruptions, high-demand periods, or weather events may occasionally cause delays beyond our control.

  • To avoid misunderstandings: The “shipping time” refers to the total time from order placement to final delivery, not just when the item leaves the warehouse.

  • Cancellations: If you choose to cancel your order because it has not arrived within the estimated delivery window, you may be responsible for applicable shipping charges, restocking fees, warehouse handling costs, and other related fees.

  • Chargebacks: Customers who initiate chargebacks due to shipping delays without contacting us first may be held legally responsible for losses. We strongly encourage open communication so we can resolve any delivery concerns directly and efficiently via our Atlanta-based support team.

Delivery Options

  • Threshold Shipping: Your item will be delivered to your front door, porch, garage, or a covered entryway.

 

Why Buy From Us

We get it. You've got a lot of choice when it comes to online retailers.
Here's why we think you should shop with us at ProAudioReserve.

  • Free Shipping USA wide. 
  • 30 Day Easy Returns. Not happy with your product, we'll take it back noquestions asked.
  • Great Service. We pride ourselves on the best service, anywhere.

Reviews

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Description

HK Audio LINEAR 9 118 Sub A

HK Audio LINEAR 9 118 Sub A 1100W amplification and bass-reflex design

1100W Class-D Power In Efficient Bass-Reflex Design

The 1100W RMS Class-D amplifier drives the 18-inch woofer with 4-inch voice coil to 131dB peak SPL, providing enough output for mid-sized venue systems and touring applications. The bass-reflex tuning optimizes efficiency in the 42-100Hz range, allowing the cabinet to produce high SPL without requiring excessive amplifier power or massive enclosure volume. Frequency response extends to 38Hz at -10dB, covering the fundamental bass range for electronic music, kick drums, and bass guitar without rolling off prematurely. The compact 21.7" x 22.1" x 27.2" dimensions and 91.5-pound weight make single-person transport practical, while the birch multiplex construction with PU coating maintains structural integrity through repeated gigging. The bass-reflex port tuning focuses on controlled output rather than excessive boom, so low-frequency content maintains definition instead of turning into indistinct rumble. 

 LINEAR 9 118 Sub A front-panel cardioid presets and direct access

Front-Panel Cardioid Presets Simplify Directional Arrays

Direct access to cardioid 1:1 and 2:1 presets via front-panel controls eliminates the laptop-and-network requirement for quick directional bass setups. The 1:1 cardioid mode uses two subs—one forward-firing, one rear-firing with phase-delayed signal—to create front-focused bass patterns that reduce stage wash and rear reflections. The 2:1 mode uses two forward subs and one rear sub for asymmetrical cardioid patterns with greater front-to-back rejection. These presets automatically generate the correct phase relationships and delay timing, so you're deploying cardioid arrays without calculating milliseconds or worrying about polarity mistakes. The dedicated DSP output provides the processed signal for feeding rear-firing subs or integrating non-networked speakers into controlled systems. This becomes critical when you need cardioid coverage but don't have matching network-capable subwoofers, or when integrating the LINEAR 9 into existing systems with mixed speaker types.

 HK Audio 118 Sub A networked DSP control and 96kHz processing

Network-Controllable DSP With Professional Processing

Ethercon RJ45 connectivity (in/thru) enables remote control via HK Audio's DSP CONTROL software for Windows and macOS. The onboard DSP platform runs at 96kHz sample rate with less than 2.6ms system latency—low enough for live performance where timing between subs and tops matters. Fully parametric 10-band EQ with variable filter characteristics provides surgical control over room modes and system tuning, while independent low-pass filtering, polarity control, level adjustment, delay (for time-alignment), and limiting protect the driver and optimize system response. The stereo preamplifier maintains separate left and right channels, supporting true stereo 2.1 configurations rather than forcing mono summation at the sub. This matters in installed systems or DJ applications where maintaining stereo imaging through the low frequencies preserves spatial information. PowerCon NAC3 in/thru connections simplify power distribution across multi-sub arrays, and the lockable connectors prevent accidental disconnection during shows. Made in Germany with attention to component quality and construction standards, the LINEAR 9 118 Sub A delivers reliable performance in professional touring and rental applications.

Highlights

  • 1100W RMS Class-D amplifier drives 18-inch woofer with 4-inch voice coil to 131dB peak SPL
  • Bass-reflex design extends response to 38Hz (-10dB) in compact 91.5-pound enclosure
  • Front-panel access to cardioid 1:1 and 2:1 presets for quick directional bass deployment
  • Network-controllable DSP (96kHz, <2.6ms latency) with 10-band parametric EQ and comprehensive processing
  • Dedicated DSP output integrates non-networked speakers and provides processed signal for cardioid arrays
  • Stereo preamplifier maintains separate L/R channels for true 2.1 system configurations
  • Birch multiplex construction with PU coating and lockable PowerCon/Ethercon connections

Technical Specifications

Specification Details
Max. SPL @ 10% THD 129 dB half space (42 Hz – 100 Hz averaged)
Max. SPL Peak @ 10% THD 131 dB half space
Frequency Response (+/- 3 dB) 42 Hz – X-over
Frequency Response (-10 dB) 38 Hz – X-over
Power Amp Output (RMS) 1100 W
Amp Type Class D
LF Driver 1x 18", 4" voice coil
Maximum Input Level +20 dBu
Analog Inputs 2x XLR combo balanced
Analog Thru 2x XLR balanced
DSP Out 1x XLR balanced
Network Port Ethercon RJ45, 1x In, 1x Thru
Filter Presets Front, Cardioid 1:1, Cardioid 2:1, Remote
Remote Software DSP CONTROL (Windows, macOS)
DSP Functions Fully parametric 10-band EQ, Low-Pass Filter, Polarity, Level, Delay, Limiter, Mute
Sample Rate 96 kHz
System Latency < 2.6 ms
Mains Connector 1x Powercon NAC3 In, 1x Powercon NAC3 Thru, 100–240 V
Power Consumption 1.9 A / 100–240 V nominal (EN 62368-1)
Pole Mount 1x M20
Carrying Handles 2x MultiGrip
Housing Birch multiplex
Finish PU coating black
Front Grille 2 mm metal grille backed with black acoustic foam
Dimensions (W x H x D) 21.7" x 22.1" x 27.2" (55 x 56 x 69 cm)
Weight 91.5 lbs (41.5 kg)
Manufacturing Made in Germany

What's in the Box

Included Items
HK Audio LINEAR 9 118 Sub A
Power Cable
Manual
Shipping

Shipping & Returns

  • We deliver all US orders in 3–5 business days
  • Free cancellations
  • Returns accepted within 30 days (unused items)

Order Confirmation

Once your order is placed, you will receive an order confirmation email. This confirms that we have received your order and have pre-authorized your credit card for the purchase. After confirming availability with our suppliers, we will proceed accordingly:

  • If your item is available and ready to ship within 1–2 business days, we will process the charge and arrange for shipment.

  • If your item is on backorder or unavailable, the pre-authorization will be voided and you will be notified by email.

  • Please note: While most items ship out within 1–2 business days, total delivery time is typically 3–5 business days, depending on your location and carrier handling.

Order Shipment

If your item is in stock and your payment has been processed, your order will typically ship within 1–2 business days. Total delivery time is approximately 3–5 business days from the date of order. Once shipped, you will receive tracking information at the email address provided during checkout within 24 hours of dispatch.

If you have not received tracking information within 3–5 business days of placing your order, please contact us at support@proaudioreserve.com.

The Distributor-Direct Advantage

To ensure you receive the most recent hardware revisions and 100% factory-sealed units, Pro Audio Reserve utilizes a Distributor-Direct fulfillment model. Unlike big-box retailers that may ship "floor models" or gear that has been sitting in general-purpose warehouses, your equipment is pulled directly from the primary manufacturer hub, serialized, and dispatched. This process ensures the highest level of quality control for professional-grade recording equipment.

Shipping Policy

We currently offer free shipping within the United States only. If the checkout process on our website allows you to enter a shipping address and complete your order, your location is eligible to receive delivery.

Changing Shipping Address

If you need to change your shipping address after your order has been processed or shipped, we will do our best to accommodate the request. Please note that address changes may result in delivery delays. Any additional costs incurred due to address changes, including carrier fees or rerouting charges will be the responsibility of the customer. No exceptions.

Shipping Times

All shipping times provided are estimates and should not be considered guarantees. Most orders ship out within 1–2 business days from the time payment is processed. However, total delivery time is typically 3–5 business days, depending on your location, carrier performance, and supplier fulfillment timelines.

We work closely with our vendors to ensure timely deliveries, but please note that supply chain disruptions, high-demand periods, or weather events may occasionally cause delays beyond our control.

  • To avoid misunderstandings: The “shipping time” refers to the total time from order placement to final delivery, not just when the item leaves the warehouse.

  • Cancellations: If you choose to cancel your order because it has not arrived within the estimated delivery window, you may be responsible for applicable shipping charges, restocking fees, warehouse handling costs, and other related fees.

  • Chargebacks: Customers who initiate chargebacks due to shipping delays without contacting us first may be held legally responsible for losses. We strongly encourage open communication so we can resolve any delivery concerns directly and efficiently via our Atlanta-based support team.

Delivery Options

  • Threshold Shipping: Your item will be delivered to your front door, porch, garage, or a covered entryway.

 

Why Buy From Us

We get it. You've got a lot of choice when it comes to online retailers.
Here's why we think you should shop with us at ProAudioReserve.

  • Free Shipping USA wide. 
  • 30 Day Easy Returns. Not happy with your product, we'll take it back noquestions asked.
  • Great Service. We pride ourselves on the best service, anywhere.

Reviews

Customer Reviews

Be the first to write a review
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