} HK Audio LINEAR 5 MK II 118 Sub HPA 18" Active Subwoofer — Pro Audio Reserve
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HK Audio LINEAR 5 MK II 118 Sub HPA 18" Active Subwoofer

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Description

HK Audio LINEAR 5 MK II 118 Sub HPA Overview

  HK Audio 118 Sub HPA 3000W Class-D amplifier and 18-inch woofer

3000W Peak Amplification With Headroom To Spare

The Class-D amplifier delivers 1500W continuous and 3000W peak power, giving you the headroom needed to reproduce transient bass content without compression or strain. This matters when you're running electronic music with synthesized sub-bass or tracking kick drums that demand clean reproduction of the fundamental. The 18-inch driver features a 4-inch voice coil that handles thermal stress during sustained high-output operation, while the bass-reflex tuning extends usable response down to 33Hz at -10dB. Maximum SPL hits 131dB peak in half-space, so the subwoofer keeps pace with high-output mid/high cabinets in club installations, outdoor stages, and large venue systems without becoming the weak link in your low-frequency coverage. 

 LINEAR 5 MK II 118 Sub HPA cardioid preset modes and directional control

Cardioid Presets For Directional Bass Control

Built-in cardioid operating modes (1:1 and 2:1 vertical) solve the low-frequency bleed problem that plagues omnidirectional subwoofer arrays. By configuring multiple subs with phase-delayed signals, these presets create directional bass patterns that focus energy toward the audience while canceling output behind the system. This dramatically reduces stage wash critical when you've got open vocal mics that pick up excessive low-end rumble and minimizes reflections in acoustically problematic rooms. The 2:1 vertical preset uses two forward-firing subs and one rear-firing sub to create asymmetrical cardioid patterns, while the 1:1 mode provides balanced front-to-back rejection. These aren't gimmicks, they're proven deployment strategies used in professional touring systems where controlling low-frequency dispersion directly impacts mix clarity and gain-before-feedback.

 HK Audio 118 Sub HPA DSP control and networked system management

Networked DSP Control For System Optimization

Ethercon RJ45 connectivity (with in/thru) enables remote DSP control via the included DSP CONTROL software for Windows and Mac. The onboard processing includes a fully parametric 10-band EQ with variable filter characteristics, letting you notch out room modes or boost specific frequency ranges for genre-specific tuning. Low-pass filtering sets the crossover point when integrating with tops, while independent level, delay, polarity, and limiter controls ensure proper system alignment and driver protection. System latency stays at or below 2.6ms, making the subwoofer suitable for live performance where timing matters. PowerCon NAC3 in/thru connections simplify power distribution across multi-cabinet systems, eliminating the cable spaghetti that comes with individual power runs to each sub. The dual XLR combo inputs accept balanced signals, with XLR thru outputs and a dedicated DSP output for flexible signal routing in complex PA configurations.

Highlights

  • 3000W peak Class-D amplifier drives 18-inch woofer with 4-inch voice coil to 131dB SPL
  • Bass-reflex enclosure tuned for 33Hz (-10dB) low-frequency extension with controlled output
  • Integrated cardioid presets (1:1 and 2:1 vertical) for directional bass management
  • Networked DSP control via Ethercon with 10-band parametric EQ and comprehensive processing
  • PowerCon NAC3 in/thru connections for efficient power distribution in multi-sub arrays
  • Birch multiplex construction with M20 pole mount and four MultiGrip handles
  • System latency ≤2.6ms for live performance timing accuracy

LINEAR 5 MK II 188 SUB HPA 18" Specifications

Specification Details
Max. SPL @ 10% THD 130 dB half space (36 Hz – 100 Hz averaged)
Max. SPL Peak @ 10% THD 131 dB half space
Frequency Response (+/-3 dB) 36 Hz – X-over
Frequency Response (-10 dB) 33 Hz – X-over
Power Amp Output (RMS/Peak) 1,500 W / 3,000 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 vertical, Cardioid 2:1 vertical, Remote
Remote Software DSP CONTROL (Windows, Mac OS)
DSP Functions Fully parametric 10-band EQ, Low-Pass Filter, Polarity, Level, Delay, Limiter, Mute
Sample Rate 48 kHz
System Latency ≤ 2.6 ms
Mains Connector 1x Powercon NAC3 In, 1x Powercon NAC3 Thru, 100–240 V
Power Consumption 2.5 A / 100–240 V nominal (EN 62368-1)
Pole Mount 1x M20
Carrying Handles 4x HK Audio MultiGrip
Housing Birch multiplex
Finish Black acrylic enamel
Front Grille 2 mm metal grille backed with black acoustic foam
Dimensions (W x H x D) 23.62" x 23.94" x 31.10" (60 x 60.8 x 79 cm)
Weight 125.22 lbs (56.8 kg)

What's in the Box

Included Items
HK Audio LINEAR 5 MK II 118 Sub HPA
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.

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Description

HK Audio LINEAR 5 MK II 118 Sub HPA Overview

  HK Audio 118 Sub HPA 3000W Class-D amplifier and 18-inch woofer

3000W Peak Amplification With Headroom To Spare

The Class-D amplifier delivers 1500W continuous and 3000W peak power, giving you the headroom needed to reproduce transient bass content without compression or strain. This matters when you're running electronic music with synthesized sub-bass or tracking kick drums that demand clean reproduction of the fundamental. The 18-inch driver features a 4-inch voice coil that handles thermal stress during sustained high-output operation, while the bass-reflex tuning extends usable response down to 33Hz at -10dB. Maximum SPL hits 131dB peak in half-space, so the subwoofer keeps pace with high-output mid/high cabinets in club installations, outdoor stages, and large venue systems without becoming the weak link in your low-frequency coverage. 

 LINEAR 5 MK II 118 Sub HPA cardioid preset modes and directional control

Cardioid Presets For Directional Bass Control

Built-in cardioid operating modes (1:1 and 2:1 vertical) solve the low-frequency bleed problem that plagues omnidirectional subwoofer arrays. By configuring multiple subs with phase-delayed signals, these presets create directional bass patterns that focus energy toward the audience while canceling output behind the system. This dramatically reduces stage wash critical when you've got open vocal mics that pick up excessive low-end rumble and minimizes reflections in acoustically problematic rooms. The 2:1 vertical preset uses two forward-firing subs and one rear-firing sub to create asymmetrical cardioid patterns, while the 1:1 mode provides balanced front-to-back rejection. These aren't gimmicks, they're proven deployment strategies used in professional touring systems where controlling low-frequency dispersion directly impacts mix clarity and gain-before-feedback.

 HK Audio 118 Sub HPA DSP control and networked system management

Networked DSP Control For System Optimization

Ethercon RJ45 connectivity (with in/thru) enables remote DSP control via the included DSP CONTROL software for Windows and Mac. The onboard processing includes a fully parametric 10-band EQ with variable filter characteristics, letting you notch out room modes or boost specific frequency ranges for genre-specific tuning. Low-pass filtering sets the crossover point when integrating with tops, while independent level, delay, polarity, and limiter controls ensure proper system alignment and driver protection. System latency stays at or below 2.6ms, making the subwoofer suitable for live performance where timing matters. PowerCon NAC3 in/thru connections simplify power distribution across multi-cabinet systems, eliminating the cable spaghetti that comes with individual power runs to each sub. The dual XLR combo inputs accept balanced signals, with XLR thru outputs and a dedicated DSP output for flexible signal routing in complex PA configurations.

Highlights

  • 3000W peak Class-D amplifier drives 18-inch woofer with 4-inch voice coil to 131dB SPL
  • Bass-reflex enclosure tuned for 33Hz (-10dB) low-frequency extension with controlled output
  • Integrated cardioid presets (1:1 and 2:1 vertical) for directional bass management
  • Networked DSP control via Ethercon with 10-band parametric EQ and comprehensive processing
  • PowerCon NAC3 in/thru connections for efficient power distribution in multi-sub arrays
  • Birch multiplex construction with M20 pole mount and four MultiGrip handles
  • System latency ≤2.6ms for live performance timing accuracy

LINEAR 5 MK II 188 SUB HPA 18" Specifications

Specification Details
Max. SPL @ 10% THD 130 dB half space (36 Hz – 100 Hz averaged)
Max. SPL Peak @ 10% THD 131 dB half space
Frequency Response (+/-3 dB) 36 Hz – X-over
Frequency Response (-10 dB) 33 Hz – X-over
Power Amp Output (RMS/Peak) 1,500 W / 3,000 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 vertical, Cardioid 2:1 vertical, Remote
Remote Software DSP CONTROL (Windows, Mac OS)
DSP Functions Fully parametric 10-band EQ, Low-Pass Filter, Polarity, Level, Delay, Limiter, Mute
Sample Rate 48 kHz
System Latency ≤ 2.6 ms
Mains Connector 1x Powercon NAC3 In, 1x Powercon NAC3 Thru, 100–240 V
Power Consumption 2.5 A / 100–240 V nominal (EN 62368-1)
Pole Mount 1x M20
Carrying Handles 4x HK Audio MultiGrip
Housing Birch multiplex
Finish Black acrylic enamel
Front Grille 2 mm metal grille backed with black acoustic foam
Dimensions (W x H x D) 23.62" x 23.94" x 31.10" (60 x 60.8 x 79 cm)
Weight 125.22 lbs (56.8 kg)

What's in the Box

Included Items
HK Audio LINEAR 5 MK II 118 Sub HPA
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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(0)
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