} TK Audio BC1-THD Stereo Bus Compressor — Pro Audio Reserve
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TK Audio BC1-THD Stereo Bus Compressor

$1,399.00
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Description
TK Audio BC1-THD stereo bus compressor front panel

The Glue Your Mix Has Been Missing

Every mix reaches a point where the individual elements are all good but nothing is locked together — and that's exactly what the BC1-THD was built to fix. Fast, transparent VCA compression with stepped controls for threshold, ratio, attack, release, and output gain gives you the cohesion and punch your bus needs without sacrificing the clarity that makes a mix translate.

Two features set the BC1-THD apart from a standard bus compressor. The Grab function shifts the threshold knee from soft to hard, tightening the compression character for a more assertive, immediate response when the session calls for it. The THD function adds rich even-order harmonics to the signal path — introducing the kind of transformer-style warmth and body that makes a mix feel finished and full.

As an authorized dealer, Pro Audio Reserve ensures your TK Audio BC1-THD is genuine, backed by full manufacturer warranty and support.

 TK Audio BC1-THD rackmount VCA bus compressor studio setup

Sidechain Flexibility That Keeps Your Low End in Control

Nothing derails a bus compressor faster than kick drum and bass riding the gain reduction and making everything pump when you don't want it to. The BC1-THD gives you a three-position sidechain HPF — selectable at 80Hz, 150Hz, and 220Hz — so you can dial out exactly as much low-frequency sensitivity as your mix demands without guesswork.

A dedicated external sidechain input on unbalanced TRS jacks opens the door to more advanced techniques — ducking, frequency-specific triggering, or keying the compressor from a separate source entirely. Single or dual sidechain detector modes give you further control over how the stereo field is handled during gain reduction.

 TK Audio BC1-THD rear panel XLR and sidechain I/O connections

Parallel Compression Built Right In

The onboard Blend control makes parallel compression something you can set up in seconds rather than a complex parallel bus routing situation. Dial in your compression settings, then blend the wet and dry signals to exactly the ratio that keeps your transients alive while the compressor does its work underneath. A dry signal mute switch lets you audition the compressed signal in isolation without disturbing your blend setting — a small detail that saves real time during a mix.

Stepped knobs throughout mean every setting you land on is one you can write down, return to, and match across multiple sessions. The BC1-THD is a bus compressor you can rely on to sound the same every time you patch it in.

Highlights

  • Stereo VCA bus compressor with stepped controls for reliable recall across all parameters
  • Grab function shifts threshold knee from soft to hard for a tighter, more assertive compression character
  • THD function adds even-order harmonics for transformer-style warmth and body
  • 3-position sidechain HPF (80Hz, 150Hz, 220Hz) with external sidechain input on TRS jacks
  • Built-in Blend control for onboard parallel compression with dry signal mute for easy A/B

TK Audio BC1-THD Specifications

Specification Details
Type Stereo VCA Bus Compressor
Channels Stereo
Threshold -20dB to +20dB
Ratio 1.5:1, 2:1, 4:1, 10:1
Attack 0.1, 0.3, 0.6, 1, 3, 6, 10, 30, 60, 120ms
Release 50ms, 100ms, 300ms, 600ms, 1.2s, Auto
Makeup Gain 0 to +20dB
Sidechain HPF 80Hz, 150Hz, 220Hz (-6dB/octave)
External Sidechain Unbalanced TRS jacks (switchable in/out)
THD Function Adds even-order harmonics
Grab Function Selects harder threshold knee
Frequency Response 20Hz–20kHz (<-0.025dB), 20Hz–80kHz (<-0.3dB)
THD+N <0.0045% at 0dBu
Input Impedance 20k ohms
Output Impedance 50 ohms
Maximum Input Level +26dBu
Maximum Output Level +27dBu into 600 ohms
Inputs 2 x XLR
Outputs 2 x XLR
Power Internal regulated supply with toroidal transformer, 115/230V selectable
Rack Spaces 1U
Manufacturer Part Number BC1THD

What's in the Box

Included Items
TK Audio BC1-THD Stereo Bus Compressor
IEC Power Cable
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
TK Audio BC1-THD stereo bus compressor front panel

The Glue Your Mix Has Been Missing

Every mix reaches a point where the individual elements are all good but nothing is locked together — and that's exactly what the BC1-THD was built to fix. Fast, transparent VCA compression with stepped controls for threshold, ratio, attack, release, and output gain gives you the cohesion and punch your bus needs without sacrificing the clarity that makes a mix translate.

Two features set the BC1-THD apart from a standard bus compressor. The Grab function shifts the threshold knee from soft to hard, tightening the compression character for a more assertive, immediate response when the session calls for it. The THD function adds rich even-order harmonics to the signal path — introducing the kind of transformer-style warmth and body that makes a mix feel finished and full.

As an authorized dealer, Pro Audio Reserve ensures your TK Audio BC1-THD is genuine, backed by full manufacturer warranty and support.

 TK Audio BC1-THD rackmount VCA bus compressor studio setup

Sidechain Flexibility That Keeps Your Low End in Control

Nothing derails a bus compressor faster than kick drum and bass riding the gain reduction and making everything pump when you don't want it to. The BC1-THD gives you a three-position sidechain HPF — selectable at 80Hz, 150Hz, and 220Hz — so you can dial out exactly as much low-frequency sensitivity as your mix demands without guesswork.

A dedicated external sidechain input on unbalanced TRS jacks opens the door to more advanced techniques — ducking, frequency-specific triggering, or keying the compressor from a separate source entirely. Single or dual sidechain detector modes give you further control over how the stereo field is handled during gain reduction.

 TK Audio BC1-THD rear panel XLR and sidechain I/O connections

Parallel Compression Built Right In

The onboard Blend control makes parallel compression something you can set up in seconds rather than a complex parallel bus routing situation. Dial in your compression settings, then blend the wet and dry signals to exactly the ratio that keeps your transients alive while the compressor does its work underneath. A dry signal mute switch lets you audition the compressed signal in isolation without disturbing your blend setting — a small detail that saves real time during a mix.

Stepped knobs throughout mean every setting you land on is one you can write down, return to, and match across multiple sessions. The BC1-THD is a bus compressor you can rely on to sound the same every time you patch it in.

Highlights

  • Stereo VCA bus compressor with stepped controls for reliable recall across all parameters
  • Grab function shifts threshold knee from soft to hard for a tighter, more assertive compression character
  • THD function adds even-order harmonics for transformer-style warmth and body
  • 3-position sidechain HPF (80Hz, 150Hz, 220Hz) with external sidechain input on TRS jacks
  • Built-in Blend control for onboard parallel compression with dry signal mute for easy A/B

TK Audio BC1-THD Specifications

Specification Details
Type Stereo VCA Bus Compressor
Channels Stereo
Threshold -20dB to +20dB
Ratio 1.5:1, 2:1, 4:1, 10:1
Attack 0.1, 0.3, 0.6, 1, 3, 6, 10, 30, 60, 120ms
Release 50ms, 100ms, 300ms, 600ms, 1.2s, Auto
Makeup Gain 0 to +20dB
Sidechain HPF 80Hz, 150Hz, 220Hz (-6dB/octave)
External Sidechain Unbalanced TRS jacks (switchable in/out)
THD Function Adds even-order harmonics
Grab Function Selects harder threshold knee
Frequency Response 20Hz–20kHz (<-0.025dB), 20Hz–80kHz (<-0.3dB)
THD+N <0.0045% at 0dBu
Input Impedance 20k ohms
Output Impedance 50 ohms
Maximum Input Level +26dBu
Maximum Output Level +27dBu into 600 ohms
Inputs 2 x XLR
Outputs 2 x XLR
Power Internal regulated supply with toroidal transformer, 115/230V selectable
Rack Spaces 1U
Manufacturer Part Number BC1THD

What's in the Box

Included Items
TK Audio BC1-THD Stereo Bus Compressor
IEC Power Cable
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