Canary Audio Grande Reference Monoblock Amplifiers

Canary Audio Grand Reference 300B Monoblock Amplifiers

120 Watts of Class A Triode Power per Channel. Sixteen 300B Vacuum Tubes. Reference-Level American High-End Engineering.

The Canary Audio Grand Reference represents the pinnacle of Canary Audio’s 300B vacuum tube monoblock amplifier design. Developed as the successor to the Reference One and Reference Two amplifiers, the Grand Reference brings together more than 25 years of specialist audio engineering experience, proprietary circuit development and exceptional American craftsmanship.

Each Grand Reference monoblock employs eight 300B directly heated triode output tubes, supported by a sophisticated Class A triode circuit, redesigned power and output transformers and an advanced high-voltage power supply.

With a manufacturer-rated output of 120 watts RMS per monoblock, the Grand Reference offers an extraordinary level of power for a 300B-based high-end audio amplifier.

Designed and handcrafted in California, USA, the Grand Reference is created for demanding reference stereo systems where tube amplification, substantial driving capability and uncompromising construction are central priorities.

Canary Audio Grand Reference – The Flagship 300B Monoblock Amplifier

The Grand Reference is the culmination of Canary Audio’s experience in building high-performance vacuum tube electronics.

Its lineage extends directly to the manufacturer’s highly regarded Reference One and Reference Two monoblock amplifiers.

For the Grand Reference, Canary Audio redesigned important areas of the circuit, including the signal input stage and the substantial transformer assemblies.

These changes were introduced to provide greater available power while maintaining the company’s established approach to natural musical reproduction.

Rather than treating the 300B as a tube intended only for low-power amplifiers, Canary Audio designed a large-scale output architecture capable of delivering reference-level power.

Sixteen 300B Triodes in a Stereo Pair

At the heart of the Canary Audio Grand Reference 300B Monoblock Amplifiers are sixteen directly heated 300B output tubes across a complete stereo pair.

Each monoblock contains eight 300B tubes, arranged as four matched pairs for its dedicated audio channel.

The use of multiple 300B tubes allows the amplifier to achieve significantly greater power capability than conventional single-ended 300B designs.

As a point of comparison, many traditional single-ended 300B amplifiers offer approximately 7 to 9 watts of output power, depending on their circuit design and operating conditions.

The Grand Reference adopts a fundamentally different, high-power architecture to achieve its 120-watt rating.

This makes the Grand Reference especially interesting to audiophiles who value 300B amplification but require more power for their chosen loudspeaker systems.

Canary Audio Grand Reference – Reference 300B Engineering

Discover the exceptional construction of the Canary Audio Grand Reference monoblock amplifiers, featuring sixteen 300B output tubes in a complete stereo pair, substantial chassis engineering and dedicated high-end analogue connections.

Illuminated Power Meters and Reference Chassis Design

The Grand Reference features custom illuminated power meters and an imposing aluminium front-panel design, reflecting its position within Canary Audio’s reference amplifier range.

Grand Reference Power Meter Detail

A closer look at the distinctive illuminated output meter and handcrafted California construction.

120 Watts RMS of Class A Triode Power

Canary Audio specifies 120 watts RMS per channel for the Grand Reference.

The manufacturer describes its circuit as operating in Class A triode mode.

Class A operation is associated with carefully controlled output-stage conduction and relatively high operating power consumption.

In the Grand Reference, the considerable number of 300B tubes and substantial power supply architecture are essential to achieving the published output rating.

This is not a conventional 300B single-ended amplifier with a small increase in power. It is a reference-grade monoblock design developed specifically for substantially higher output capability.

The greater power rating can expand the range of loudspeaker systems worth considering, although speaker sensitivity, impedance characteristics and room requirements remain important.

Eight 300B Output Tubes per Monoblock

Each Grand Reference amplifier is a self-contained monoblock dedicated to one stereo channel.

The complete output stage of each chassis uses eight 300B tubes.

The 300B is a directly heated power triode with an extensive history in professional and high-fidelity audio applications.

Its use in premium high-end amplifiers is associated with carefully designed transformer-coupled output stages and distinctive circuit philosophies.

Canary Audio developed the Grand Reference to combine these engineering traditions with substantially increased output power.

Newly Designed Power and Output Transformers

Transformer design is one of the defining characteristics of a high-quality vacuum tube power amplifier.

For the Grand Reference, Canary Audio developed new, oversized, custom-wound power and output transformers.

The output transformer provides the required impedance transformation between the high-voltage tube output circuitry and a conventional loudspeaker.

The power transformer supports the significant electrical requirements of the multiple-tube amplifier architecture.

Canary Audio selected these transformer designs to support extended low-frequency and high-frequency performance.

The manufacturer specifies a frequency response extending from 8Hz to 90kHz within ±1dB.

Epoxy-Potted Transformers and Chokes

The Grand Reference employs substantial magnetic components housed in protective metal enclosures.

Canary Audio specifies that the transformers and filtering chokes are potted with epoxy resin.

This construction is intended to improve mechanical stability, help manage vibration and support effective thermal behaviour.

Epoxy-potted magnetic assemblies are a distinctive part of the Grand Reference’s substantial internal construction.

They also contribute to the remarkable weight of each amplifier.

Dual-Choke High-Voltage Power Supply Filtering

The Grand Reference features two independent chokes for rectifier filtering in each monoblock.

A choke is an inductive component used within electrical power supply filtering circuits.

Its purpose is to help smooth the rectified voltage and reduce unwanted variations that could affect the operation of the amplification stages.

Power supply engineering is especially important in a large Class A tube amplifier, where multiple output valves require carefully controlled operating conditions.

The Grand Reference combines choke filtering with its custom transformer design to support the amplifier’s considerable electrical demands.

Redesigned Input Circuit for Greater Dynamic Capability

Canary Audio redesigned the Grand Reference input circuitry as part of the transition from the previous Reference series.

The manufacturer describes the updated stage as intended to provide faster response and improved dynamic behaviour.

The input stage must accurately handle the signal arriving from the preamplifier before it is distributed through the amplifier’s driver and output stages.

By refining this part of the circuit, Canary Audio sought to preserve clarity and control while increasing the overall power capability of the amplifier.

6SN7GTB and 6SL7 Vacuum Tube Driver Stages

In addition to the eight 300B output tubes, each Grand Reference monoblock contains:

• 3 × 6SN7GTB vacuum tubes
• 1 × 6SL7 vacuum tube

These small-signal dual-triode valves form part of the amplifier’s supporting signal circuitry.

The 6SN7 and 6SL7 are established vacuum tube types widely used in specialist high-fidelity amplifier designs.

The complete manufacturer-listed complement is therefore twelve vacuum tubes per monoblock, or twenty-four tubes across a stereo pair.

Individual Bias Adjustment for Every 300B Tube

Each 300B output tube has its own dedicated bias adjustment arrangement, accessible from the rear panel of the amplifier.

Individual bias adjustment allows the operating conditions of the output tubes to be set according to Canary Audio’s prescribed procedure.

This is particularly important in an amplifier using eight power tubes per channel.

Correct biasing contributes to proper electrical operation and helps ensure that replacement tubes are used within the intended operating conditions.

Safety note: Bias adjustments should only be undertaken in accordance with the manufacturer’s instructions. High-voltage vacuum tube amplifiers can retain dangerous electrical energy, even after being switched off.

Precision-Machined Delrin 300B Tube Sockets

The Grand Reference uses exclusive precision-machined Delrin sockets for its 300B tubes.

These sockets incorporate gold-plated pin receptacles.

Delrin is an engineering polymer used in applications requiring dimensional stability and precise mechanical construction.

The specialised socket design reflects Canary Audio’s attention to the physical and electrical connections supporting the output tubes.

Optional Balanced XLR Input

The Grand Reference can be supplied with a balanced input upgrade.

According to Canary Audio, this option uses a line input transformer to accommodate a balanced connection.

It offers an alternative for systems using high-end preamplifiers with balanced analogue outputs.

Important: The balanced input is an optional upgrade and should not be advertised as included on every Grand Reference amplifier.

Confirm the required configuration before ordering.

470kΩ Input Impedance

The manufacturer specifies an input impedance of 470,000 ohms.

This unusually high impedance can make the Grand Reference relatively straightforward to drive from many compatible high-quality preamplifiers.

The published input sensitivity is 0.50V for full rated output.

Because this is a relatively sensitive high-power amplifier, suitable volume control and gain matching are essential.

The Grand Reference should normally be connected to an appropriate preamplifier rather than directly to an uncontrolled fixed-level source.

Precision Power Meter with Illuminated Display

The Grand Reference incorporates a specially designed front-panel power meter.

Canary Audio specifies a custom LED-backlit display.

The meter gives the amplifier a distinctive visual identity and reinforces the substantial reference-grade character of the product.

The illuminated display is integrated into the amplifier’s front-panel design rather than added as an external accessory.

Reference-Level Frequency Response

Canary Audio specifies a frequency response of 8Hz to 90kHz, ±1dB.

This wide electrical bandwidth reflects the design goals behind the Grand Reference transformers and associated circuitry.

Although the published range extends well beyond human hearing, wide electrical bandwidth can be a useful engineering indicator when evaluating amplifier design.

Actual acoustic performance depends on the connected loudspeakers and the listening environment.

Distortion Performance at Different Power Levels

Unlike product specifications that publish a single distortion number without context, Canary Audio provides total harmonic distortion figures at several output powers.

• 10W output: Less than 0.07% THD
• 60W output: Less than 0.18% THD
• 120W output: Less than 1.0% THD

These are manufacturer-published electrical specifications.

The change in distortion with increasing power is normal for many amplifier designs, and it is useful to consider the complete power-versus-distortion relationship rather than focusing only on the maximum wattage figure.

4-Ohm and 8-Ohm Loudspeaker Connections

The Grand Reference provides loudspeaker connections for nominal 4Ω and 8Ω loads.

Transformer-coupled tube amplifiers require appropriate load matching for correct operation.

When selecting loudspeakers, consider their nominal impedance, minimum impedance, sensitivity and phase characteristics.

For the best results, the choice should be based on the complete electrical behaviour of the speaker, not simply its advertised nominal impedance.

Handcrafted in California, USA

Canary Audio states that the Grand Reference is 100% handcrafted in California.

The company’s approach combines carefully selected components, substantial mechanical engineering and dedicated audio amplifier construction.

The Grand Reference is designed as a specialist high-end component, not a mass-market tube amplifier.

Its extensive output tube complement, oversized transformers and very heavy chassis underline the scale of the project.

Grand Reference Chassis and Installation Requirements

Each Grand Reference monoblock measures approximately:

• 17 inches wide (43.2cm)
• 30.5 inches deep (77.5cm)
• 11 inches high (27.9cm)

The manufacturer specifies a net weight of 155lb, approximately 70.3kg, per monoblock.

A stereo pair therefore weighs approximately 140.6kg before packing materials and accessories are added.

These dimensions and weights should be considered carefully during system planning.

Each amplifier requires suitable mechanical support, adequate ventilation and sufficient clearance for operation and servicing.

Professional handling and appropriate transport arrangements are strongly recommended.

Canary Audio Grand Reference vs. M3000

The Canary Audio M3000 is another reference-grade monoblock amplifier using eight 300B tubes per channel.

Canary Audio states that the M3000 shares the Grand Reference’s amplifier circuit philosophy while offering a different chassis arrangement.

The two products should not be assumed to have identical physical dimensions, weight or every circuit detail.

The Grand Reference remains distinctive for its large enclosure, reference-series design and substantial construction.

Building a Reference Stereo System

The Grand Reference is intended to be used as a stereo pair, with one monoblock amplifier dedicated to each loudspeaker channel.

A suitable high-quality line preamplifier is required for source selection and volume control.

For listeners exploring complementary Canary Audio electronics, the Canary Audio C1300 Tube Preamplifier is one potential candidate, subject to system matching.

Another option is the Canary Audio C5000 Reference Preamplifier, a four-chassis dual-mono design.

When selecting a preamplifier, consider its output impedance, gain, connectivity and the Grand Reference’s 0.50V input sensitivity.

Canary Audio Grand Reference Special Features

• Reference-grade 300B monoblock power amplifiers
• Class A triode circuit design
• 120W RMS rated output per monoblock
• 8 × 300B output tubes per monoblock
• 16 × 300B tubes in a stereo pair
• 4 matched pairs of 300B tubes per channel
• 3 × 6SN7GTB and 1 × 6SL7 per monoblock
• Redesigned input circuitry
• Oversized custom-wound power transformers
• Oversized custom-wound output transformers
• Two independent power supply filtering chokes per monoblock
• Epoxy-potted transformers and chokes
• Individual bias adjustment for every 300B tube
• Exclusive machined Delrin tube sockets
• Gold-plated tube pin contacts
• Optional transformer-coupled balanced input
• Specially designed LED-backlit power meter
• 470kΩ input impedance
• 0.50V input sensitivity for rated output
• 4Ω and 8Ω speaker outputs
• 8Hz–90kHz frequency response, ±1dB
• Handcrafted in California, USA

Canary Audio Grand Reference Technical Specifications

Technical specifications are based on Canary Audio’s published Grand Reference data and are subject to change. Output ratings, tube complement, dimensions and weight refer to one monoblock unless otherwise stated. Price, available tube brands, stock status and optional balanced-input configuration should be confirmed before ordering.

Official Canary Audio Grand Reference Information

Canary Audio Grand Reference – Official Manufacturer Product Page

Canary Audio Grand Reference Frequently Asked Questions

What is the Canary Audio Grand Reference?

It is Canary Audio’s reference-grade 300B vacuum tube monoblock power amplifier, rated at 120W RMS per amplifier.

How many 300B tubes does the Grand Reference use?

Eight 300B tubes per monoblock. A complete stereo pair uses sixteen 300B tubes.

Is the Grand Reference a stereo amplifier?

Each unit is a monoblock designed for one audio channel. Two monoblocks are required for a conventional stereo system.

What is the power output?

Canary Audio specifies 120W RMS per monoblock.

Is the Grand Reference a Class A amplifier?

Yes. The manufacturer describes its circuit as operating in Class A triode mode.

Does it use conventional single-ended 300B circuitry?

No. The amplifier employs a high-power, multiple-tube architecture with eight 300B tubes per channel rather than a conventional single-ended design using one output tube.

Does the Grand Reference include balanced XLR inputs?

A transformer-coupled balanced input is available as an optional upgrade. Confirm the configuration before ordering.

Can each 300B tube be biased individually?

Yes. Canary Audio specifies a separate rear-panel bias adjustment device for each 300B output tube.

Can it drive 4-ohm loudspeakers?

The amplifier provides output connections for nominal 4Ω and 8Ω loudspeakers. The complete speaker impedance characteristics should be checked.

Does the Grand Reference need a preamplifier?

Yes. It is a dedicated power amplifier and should be used with suitable source selection and volume control.

What other tubes are used?

Each monoblock includes three 6SN7GTB tubes and one 6SL7 in addition to the eight 300B tubes.

What is the input sensitivity?

The manufacturer specifies 0.50V for full rated output.

How heavy is each Grand Reference amplifier?

Approximately 70.3kg per monoblock, excluding shipping packaging.

How much power does each amplifier consume?

The manufacturer specifies approximately 400W per monoblock.

Where is the Grand Reference manufactured?

Canary Audio states that it is handcrafted in California, USA.

Can the Grand Reference be shipped internationally?

International delivery may be arranged following confirmation of configuration, availability, professional packaging and suitable insured transport arrangements.

Why Choose the Canary Audio Grand Reference?

The Canary Audio Grand Reference 300B Monoblock Amplifiers combine a remarkable sixteen-triode stereo configuration with extensive transformer engineering, a substantial Class A power supply and dedicated American craftsmanship.

Their 120W-per-channel output rating makes them an unusually powerful interpretation of the 300B amplifier concept.

For listeners building a reference-quality stereo system around high-end vacuum tube amplification, the Grand Reference offers a distinctive combination of technical ambition, component quality and substantial driving capability.

Sixteen 300B Triodes. 120 Watts per Channel. Handcrafted Reference Amplification.

Canary Audio Grand Reference at Chameleon Audio

Contact Chameleon Audio for pricing, current availability, tube configuration, optional balanced inputs, preamplifier and loudspeaker matching, and international shipping quotations.