TECHNICAL DATA

Circle Studio Monitors

Circle 3 Passive

Transducer System . . . . . . . . . . . . . . . . . . . . . . . . . . 2 way monitor loudspeaker. Drive Units . . . . . . . . . . . . . . . . . . . . . . . . LF: Custom 110mm (4.5") NRSC cone, 25mm (1") voice coil, high linearity low-loss suspension rigid self-sealing polymer chassis and shielding antimagnet.

HF: 25mm (1") ferro-fluid cooled soft dome, high efficiency Neodymium magnet, highly focused magnetic field 25mm (1") aluminium voice coil.

Frequency Response . . . . . . . . . . . . . . . . . . . . . . . . . . . . 70Hz - 20kHz +/-3dB. Sensitivity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 83dB 1W/1m. Suggested Amplifier Power . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30 - 100W. Impedance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 Ohms nominal. Power Handling (Programme) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 60W. Crossover . . . . . . . . . . . . . . . . . . . . . . Pro-grade components on fibreglass PCB,

critically damped, 3.5kHz crossover. Connectors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Binding posts. Dimensions (HxWxD) . . . . . . . . 270mm x 175mm x 197mm / 10.6" x 6.9" x 7.8". Weight . . . . . . . 3.7kg (8.1lbs) each (net), 8.4kg (18.5lbs) packed in pairs (gross). Finish . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Durable black paint finish.

Circle 3 Active

As passive, but with the addition of an internal power amplifier.

Sensitivity For Full Output with Input sensitivity control at max: . . . . . . . . 1V RMS. Power (Programme) . . . . . . . . . . . . . . . . . . . . . . . . . . 60W Bass, 30W Tweeter. Active Crossover . . . . . . . . . . . . . . . . . . . . . . . . . . . . Crossover point at 3.5kHz.

Sallen & Key active filters for LF and HF. Advanced design using ultra high precision components.

Low noise audio semiconductors and 1% precision resistors throughout audio circuitry.

Power Amplifier . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Anti thump on/off circuitry. Regulated low noise and distortion power supply.

Connectors . . . . . . . . . . . . . . . . . . . Slide Switchable XLR (female) or RCA phono. Main Input Voltage . . . . . . . . . . . . . . . . . . . . . European model: 220-240V, 50Hz.

U.S. / Canadian model: 110-120V, 60Hz. Dimensions (HxWxD) . . . . . . . . 270mm x 175mm x 220mm / 10.6" x 6.9" x 8.7". Weight . . . . . 5.0kg (11.0lbs) each (net), 11.0kg (24.2lbs) packed in pairs (gross). Both active and passive Circle 3s are packaged in pairs. Single units can also be ordered.

Circle 5 Passive

Transducer System

. . . . . . . . . . . . . Ported 2 way monitor loudspeaker.

Drive Units . .

. . . . . . . . . . . .

. . . . . . . . . . LF: Custom 200mm (8") polymer cone,

 

 

high compliance long throw rubber surround.

 

25mm (1") high temperature aluminium voice coil and antimagnet.

 

 

HF: Custom 28mm (1.1") ferro-fluid cooled soft dome

 

with rear damping chamber. 28mm (1.1") high temperature

 

 

aluminium voice coil and antimagnet.

Frequency Response

. . . . . . . . . . . . . . . . . . . . . 48Hz - 20kHz, +/- 3dB.

Sensitivity . .

. . . . . . . . . . . .

. . . . . . . . . . . . . . . . . . . . . . . . . . . 87dB 1W/1m.

Suggested Amplifier Power . .

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50 - 200W.

Impedance

. . . . . . . . . . . . . . . . . . . . . . . . . 8 Ohms nominal.

Power Handling (Programme) .

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 120W.

Crossover

. . . . . . . . Pro-grade components on fibreglass PCB,

 

 

critically damped, 2.6kHz crossover.

Connectors

. . . . . . . . . . . . . . . . . . . . . . . . . . . Binding posts.

Dimensions (HxWxD)

420mm x 255mm x 300mm / 16.5" x 10.0" x 11.8".

Weight . . . .

10.0kg (22.0lbs) each (net), 20.4kg (44.9lbs) packed in pairs (gross).

Finish

. . . . . . . . . . . . . . . . . . . Durable black paint finish.

Circle 5 Active

As passive, but with the addition of an internal power amplifier.

Sensitivity For Full Output . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1V RMS. Power (Programme) . . . . . . . . . . . . . . . . . . . . . . . . . 140W Bass, 70W Tweeter. Active Crossover . . . . . Crossover point at 2.6kHz. Sallen & Key active filters for LF and HF. Advanced design using ultra high precision components.

Low noise audio ICs and 1% precision resistors used throughout. Power Amplifier . . . . . . . . . . . LF unit driven by twin power ICs in Push-Pull mode.

HF unit driven by a single IC. Anti thump on/off circuitry. Regulated low noise, low distortion power supply with long life capacitors, guaranteeing full power over a long service life. Polyswitch® tweeter overload protection with LED indicator.

Every module calibrated against reference for perfect stereo imaging. Connectors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Switchable XLR / RCA phono. Main Input Voltage . . . . . . . . . . . . . . . . . . . . . European model: 220-240V, 50Hz.

U.S. / Canadian model: 110-120V, 60Hz. Dimensions (HxWxD) . . . . . . 420mm x 255mm x 300mm / 16.5" x 10.0" x 11.8". Weight . . . . 12.6kg (27.7lbs) each (net), 25.6kg (56.3lbs) packed in pairs (gross). Both active and passive Circle 5s are packaged in pairs. Single units can also be ordered.

Circle 1 Powered Sub-Woofer

Transducer System

. . . . . . . . . . . . . . . . . . . . . . . .

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Active bandpass twin chamber reflex sub-woofer.

Drive Units

. . . . . . . . . . . . . . . . . . . . . . . .

. . . . . . . . . . . . . . . . . . . . . LF: 300mm (12") double-magnet, contour-optimised cone with

 

 

high compliance long throw rubber surround rigid magnesium chassis.

 

Low moving mass for fast transient attack. Air-cooled magnet system. 40mm (1.6") diameter aluminium voice coil.

Frequency Response

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33Hz - 120Hz,+/- 3dB in free space.

Sensitivity For Full Output, input sensitivity at max, sub woofer (effects) channel

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1V RMS.

Controls

. . . . . . . . . . . . . . . . . . . . . . . .

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Input sensitivity, LF boost, phase.

Active Crossover

. . . . . . . 5 main channels pass through Sallen & Key filters, crossover point at 120Hz, and

 

 

are available in XLR outputs. Advanced design using ultra high precision components.

 

 

Low noise audio semiconductors and 1% precision resistors used throughout audio circuitry.

Power Amplifier

160W min (programme). Anti thump on/off circuitry. Regulated low noise, low distortion power supply with long life capacitors,

 

 

guaranteeing full power over a long service life.

Connectors

. . . . . . . . . . . . . . . . XLR inputs (female): L, C, R, L rear, R rear. XLR (female) and RCA phono: Sub-woofer (effects channel)

 

 

XLR outputs (male) L, C, R, L rear, R rear,

 

 

all band limited to 120Hz to connect to ‘satellite’ speakers.

Main Input Voltage

. . . . . . . . . . . . . . . . . . . . . . . . .

. . . . . . . . . . .European model: 220-240V, 50Hz. U.S. / Canadian model: 110-120V, 60Hz.

Dimensions (HxWxD)

. . . . . . . . . . . . . . . . . . . . . . . . . . . 465mm x 414mm x 414mm / 18.3" x 16.3" x 16.3".

Weight

. . . . . . . . . . . . . . . . . . . . . . . .

. . . . . . . . . . . . . . 21.5kg (47.3lbs) each (net), 27.0kg (59.4lbs) packed in singles (gross).

Finish

. . . . . . . . . . . . . . . . . . . . . . . .

. . . . . . . . . . . . . . . . . . . . . . . . . . . Durable black paint finish with perforated purple grille.

Dealer Stamp

www.hhb.co.uk

HHB Communications Ltd · 73-75 Scrubs Lane, London NW10 6QU, UK

Tel: 020 8962 5000 · Fax: 020 8962 5050 · E-Mail: sales@hhb.co.uk

HHB Communications USA LLC · 1410 Centinela Avenue, Los Angeles, CA 90025-2501, USA

Tel: 310 319 1111 · Fax: 310 319 1311 · E-Mail: sales@hhbusa.com

HHB Communications Canada Ltd · 260 King Street East, Toronto, Ontario M5A 4L5, Canada

Tel: 416 867 9000 · Fax: 416 867 1080 · E-Mail: sales@hhbcanada.com

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HHB comm CIRCLE STUDIO MONITORS operating instructions Technical Data

CIRCLE STUDIO MONITORS specifications

HHB CIRCLE Studio Monitors have emerged as a notable choice for audio professionals, combining innovative technology with exceptional sound fidelity. Designed with the modern studio environment in mind, these monitors deliver remarkable clarity, precision, and accurate sound reproduction, making them an essential tool for music producers, sound engineers, and audiophiles.

One of the standout features of the HHB CIRCLE Studio Monitors is their advanced coaxial driver technology. This design integrates the woofer and tweeter into a single unit, ensuring that the sound waves from both elements arrive at the listener’s ear simultaneously. This results in a more coherent and focused soundstage, allowing for accurate imaging and enhanced stereo depth. Musicians can mix tracks with confidence, knowing they are hearing an authentic representation of their sound.

Another key aspect of the HHB CIRCLE monitors is their robust and well-constructed cabinets. Made from high-quality materials, these cabinets are designed to minimize resonance and distortion, providing a cleaner signal path. The monitors have been perfected to ensure that low-frequency response is both extended and controlled, giving producers the ability to hear the full range of their tracks without overpowering bass or muddiness.

The HHB CIRCLE monitors also feature adjustable room compensation controls, which allow users to fine-tune the response based on their studio environment. This adaptability is essential for ensuring that sound is accurately represented in a variety of room acoustics, whether in a professional studio or a small home setup.

In terms of connectivity, the monitors are equipped with balanced XLR and TRS inputs, ensuring compatibility with a wide range of audio interfaces and equipment. This versatility makes it easy for users to integrate the CIRCLE monitors into their existing setups without the need for additional adapters.

Furthermore, the design of the HHB CIRCLE Studio Monitors is both sleek and modern, making them visually appealing in any studio space. Their compact size means they can fit easily on desktop setups or in smaller studios without sacrificing sound quality.

In conclusion, the HHB CIRCLE Studio Monitors are a perfect fusion of advanced technology and user-friendly features. With their coaxial driver design, durable cabinets, adjustable settings for room acoustics, and versatile connectivity options, these monitors are ideal for anyone looking to elevate their audio production quality. Whether you’re mixing, mastering, or simply enjoying music, the HHB CIRCLE monitors promise to deliver an unparalleled listening experience.