} Heritage Audio HA-609A Dual Channel British Compressor Limiter — Pro Audio Reserve
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Heritage Audio HA-609A Dual Channel British Compressor Limiter

$2,199.00
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Description

Heritage Audio HA-609A In Action

  Heritage Audio HA-609A dual channel compressor limiter front panel

British Compression With Nothing Left Out

The HA-609A is what happens when Heritage Audio takes one of the most coveted compression topologies ever designed — British diode-bridge — and builds it from scratch with three Carnhill/St. Ives transformers per channel, a fully discrete Class A signal path, and a 73-style transformer-coupled makeup gain stage. This isn't a nod to the original. It's the real thing, built for the demands of a modern studio.

Rotary switches and precision stepped potentiometers mean your settings are repeatable, your channels match, and your recall is fast. Handcrafted at Heritage Audio's headquarters in Spain, every unit is built to perform day in and day out without compromise.

As an authorized dealer, Pro Audio Reserve ensures your HA-609A is a genuine Heritage Audio product backed by full manufacturer warranty and support.

 Heritage Audio HA-609A rackmount British Class A compressor

Compression and Limiting That Works at Every Stage

Whether you're tracking a vocalist, gluing a drum bus, or pushing your mix through a final limiter before export, the HA-609A has a setting for it. The compressor section offers standard and fast attack modes — standard for program material that needs breathing room, fast for catching the sharp transients on percussion and highly dynamic sources.

The limiter runs the same dual-mode approach with an extended threshold range that goes well beyond what vintage units offered, making it equally at home on subtle peak control and more aggressive limiting duties. Both sections can be independently bypassed, giving you precise control over exactly how much processing you're applying at any given moment.

 Heritage Audio HA-609A rear panel XLR I/O connections

Channel Matching Within Hundredths of a dB

Running stereo? The HA-609A's proprietary diode-bridge design matches compression curves and response between channels to within hundredths of a decibel — tighter than most engineers will ever need, and exactly what mastering and stereo bus work demands. Switch between stereo link and dual mono modes depending on the session.

True bypass on each channel keeps your signal path completely clean when the compression isn't needed, and the extended threshold range on both compressor and limiter sections means the HA-609A fits seamlessly into hybrid analog/digital workflows without demanding you work around its limitations.

Highlights

  • 2-channel British diode-bridge compressor/limiter with fully discrete Class A signal path
  • Three Carnhill/St. Ives transformers per channel plus 73-style transformer-coupled makeup gain
  • Standard and fast attack modes on both compressor and limiter sections
  • Proprietary diode-bridge design matches channel-to-channel compression response within hundredths of a dB
  • True bypass per channel plus independent bypass on compressor and limiter functions

Technical Specifications

Specification Details
Type Class A Diode-Bridge Compressor/Limiter
Channels 2 (Dual Mono / Stereo Link)
Controls Limit Level, Release, Threshold, Ratio, Gain Makeup
Threshold -20dBu to +20dBu
Ratio 1.5:1 to 6:1
Frequency Response 15Hz – 30kHz (±0.5dB)
Transformers 3 x Carnhill/St. Ives per channel
Inputs 2 x XLR
Outputs 2 x XLR
Bypass True bypass per channel + individual compressor/limiter bypass
Rack Spaces 2U
Power Source External power supply (included)
Manufacturer Part Number HA609A

What's in the Box

Included Items
Heritage Audio HA-609A Dual Channel Compressor/Limiter
External Power Supply
User Documentation
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
Description

Heritage Audio HA-609A In Action

  Heritage Audio HA-609A dual channel compressor limiter front panel

British Compression With Nothing Left Out

The HA-609A is what happens when Heritage Audio takes one of the most coveted compression topologies ever designed — British diode-bridge — and builds it from scratch with three Carnhill/St. Ives transformers per channel, a fully discrete Class A signal path, and a 73-style transformer-coupled makeup gain stage. This isn't a nod to the original. It's the real thing, built for the demands of a modern studio.

Rotary switches and precision stepped potentiometers mean your settings are repeatable, your channels match, and your recall is fast. Handcrafted at Heritage Audio's headquarters in Spain, every unit is built to perform day in and day out without compromise.

As an authorized dealer, Pro Audio Reserve ensures your HA-609A is a genuine Heritage Audio product backed by full manufacturer warranty and support.

 Heritage Audio HA-609A rackmount British Class A compressor

Compression and Limiting That Works at Every Stage

Whether you're tracking a vocalist, gluing a drum bus, or pushing your mix through a final limiter before export, the HA-609A has a setting for it. The compressor section offers standard and fast attack modes — standard for program material that needs breathing room, fast for catching the sharp transients on percussion and highly dynamic sources.

The limiter runs the same dual-mode approach with an extended threshold range that goes well beyond what vintage units offered, making it equally at home on subtle peak control and more aggressive limiting duties. Both sections can be independently bypassed, giving you precise control over exactly how much processing you're applying at any given moment.

 Heritage Audio HA-609A rear panel XLR I/O connections

Channel Matching Within Hundredths of a dB

Running stereo? The HA-609A's proprietary diode-bridge design matches compression curves and response between channels to within hundredths of a decibel — tighter than most engineers will ever need, and exactly what mastering and stereo bus work demands. Switch between stereo link and dual mono modes depending on the session.

True bypass on each channel keeps your signal path completely clean when the compression isn't needed, and the extended threshold range on both compressor and limiter sections means the HA-609A fits seamlessly into hybrid analog/digital workflows without demanding you work around its limitations.

Highlights

  • 2-channel British diode-bridge compressor/limiter with fully discrete Class A signal path
  • Three Carnhill/St. Ives transformers per channel plus 73-style transformer-coupled makeup gain
  • Standard and fast attack modes on both compressor and limiter sections
  • Proprietary diode-bridge design matches channel-to-channel compression response within hundredths of a dB
  • True bypass per channel plus independent bypass on compressor and limiter functions

Technical Specifications

Specification Details
Type Class A Diode-Bridge Compressor/Limiter
Channels 2 (Dual Mono / Stereo Link)
Controls Limit Level, Release, Threshold, Ratio, Gain Makeup
Threshold -20dBu to +20dBu
Ratio 1.5:1 to 6:1
Frequency Response 15Hz – 30kHz (±0.5dB)
Transformers 3 x Carnhill/St. Ives per channel
Inputs 2 x XLR
Outputs 2 x XLR
Bypass True bypass per channel + individual compressor/limiter bypass
Rack Spaces 2U
Power Source External power supply (included)
Manufacturer Part Number HA609A

What's in the Box

Included Items
Heritage Audio HA-609A Dual Channel Compressor/Limiter
External Power Supply
User Documentation
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