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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
HF: 25mm (1")
Frequency Response . . . . . . . . . . . . . . . . . . . . . . . . . . . . 70Hz - 20kHz
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:
U.S. / Canadian model:
Circle 5 Passive
Transducer System | . . . . . . . . . . . . . Ported 2 way monitor loudspeaker. | |
Drive Units . . | . . . . . . . . . . . . | . . . . . . . . . . LF: Custom 200mm (8") polymer cone, |
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| high compliance long throw rubber surround. |
| 25mm (1") high temperature aluminium voice coil and antimagnet. | |
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| HF: Custom 28mm (1.1") |
| with rear damping chamber. 28mm (1.1") high temperature | |
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| 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 | . . . . . . . . | |
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| 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
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:
U.S. / Canadian model:
Circle 1 Powered Sub-Woofer
Transducer System | . . . . . . . . . . . . . . . . . . . . . . . . | . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Active bandpass twin chamber reflex |
Drive Units | . . . . . . . . . . . . . . . . . . . . . . . . | . . . . . . . . . . . . . . . . . . . . . LF: 300mm (12") |
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| high compliance long throw rubber surround rigid magnesium chassis. |
| Low moving mass for fast transient attack. | |
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 | |
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| are available in XLR outputs. Advanced design using ultra high precision components. |
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| 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, | |
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| guaranteeing full power over a long service life. |
Connectors | . . . . . . . . . . . . . . . . XLR inputs (female): L, C, R, L rear, R rear. XLR (female) and RCA phono: | |
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| XLR outputs (male) L, C, R, L rear, R rear, |
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| all band limited to 120Hz to connect to ‘satellite’ speakers. |
Main Input Voltage | . . . . . . . . . . . . . . . . . . . . . . . . . | . . . . . . . . . . .European model: |
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 ·
Tel: 020 8962 5000 · Fax: 020 8962 5050 ·
HHB Communications USA LLC · 1410 Centinela Avenue, Los Angeles, CA
Tel: 310 319 1111 · Fax: 310 319 1311 ·
HHB Communications Canada Ltd · 260 King Street East, Toronto, Ontario M5A 4L5, Canada
Tel: 416 867 9000 · Fax: 416 867 1080 ·