HHB comm CIRCLE SERIES User's Manual
Contents
1. 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 SENSI con dE eg 83dB 1W 1m Suggested Amplifier Power EEN sauces eee 30 100W IPO ANCE EE 8 Ohms nominal Power Handling Programme 60W REENEN Pro grade components on fibreglass PCB critically damped 3 5kHz crossover GOPMECTONS Ss dis Binding posts Dimensions HxWxD 270mm x 175mm x 197mm 10 6 x 6 9 x 7 8 Weight 3 7kg 8 1105 each net 8 4kg 18 516 packed in pairs gross FINS iie a ence Durable black paint finish Circle 1 Powered Sub Woofer bea NEE EE Circle 5 Active As passive but with the addition of an internal power amplifier Sensitivity For Full ENEE 1V RMS Power Programme 140W bass 70W tweeter Active Crossover Crossover point at 2 6kHz Gallen amp Key active filters for LF and HF Advanced design using ultra high precision components Low noise audio ICs and 1 pr2. CAUTION Risk of electric shock 0 NOT OPEN ATTENTION Risque de choc electrique NE PAS OUVRIR ACHTUNG Vor dem ffnen des Ger tes Netzstecker ziehen HHO HHB COMMUNICATIONS MANUFACTURED IN THE UK LONDON LOS ANGELES TORONTO SERIAL NO OPERATING VOLTAGE THIS EQUIPMENT MUST BE EARTHED NO USER SERVICEABLE PARTS INDOOR USE ONLY 11 Loudspeaker Connection Circle 5 amp Circle 3 Passive Choosing an amplifier to match your speakers and application is important The passive HHB Circle 5 requires connection to a power amplifier with a suggested output between 50 and 200 Watts RMS and the Circle 3 should be powered by an amplifier with an output of 30 to 100 Watts Connection is made via a pair of binding posts on the rear of the loudspeaker Take care to ensure that the positive red terminal on the loudspeaker is connected to the positive red terminal on the amplifier and that the negative black terminal on the speaker is connected to the negative black terminal on the amplifier Connecting one of the loudspeakers out of phase will result in dramatic loss of low frequency signals and an incoherent spatial image Always use good quality medium or heavy duty speaker cable not thin bell wire The main function of a speaker cable is to transfer the maximum amount of current with the minimum amount of distortion It is therefore preferabl
3. POWER POWER LOW PASS FILTER CAUTION Risk of electric shock DO NOT OPEN ATTENTION Risque de choc electrique NE PAS OUVRIR ACHTUNG Vor dem ffnen des Ger tes Netzstecker ziehen COMMUNICATIONS MANUFACTURED IN THE UK LONDON LOS ANGELES TORONTO SERIAL NO OPERATING VOLTAGE THIS EQUIPMENT MUST BE EARTHED NO USER SERVICEABLE PARTS INDOOR USE ONLY Figure 2 Passive Circle 5 Rear Panel HHO HHB COMMUNICATIONS MANUFACTURED IN THE UK LONDON LOS ANGELES TORONTO HHO Gitte 5 SERIAL NO Circle 3 The compact size of the HHB Circle 3 studio monitor is ideal when space is at a premium Equally at home in project or commercial studios the Circle 3 features a 4 5 paper pulp cone optimised for use in the smaller cabinet An anti magnet screen allows the Circle 3 to be placed next to computer or video monitors The Circle 3 monitors can be used as part of a Surround sound system since passive or active they produce a sound which is both clear and dynamic the HHB house sound Key Features Circle 3 Passive amp Active High quality sound reproduction a compact package Ideal for smaller mixing applications Acoustically dead chassis Accurate bass treble driver time alignment 110mm 4 5 non resonant suspension coupl
4. stupio Monitors CIRCLE SERIES Operating Instructions interstage Phistersvej 31 2900 Hellerup Danmark Telefon 3946 0000 fax 3946 0040 www interstage dk pro audio with a smile Table of Contents INTRODUCTION 4 PRECAUTIONS 5 SERVICE eet ged edd e ee 5 CIRCLE S WEEN 6 Key features passive and active 6 Key features active 6 Active Circle 5 rear panel 0 1 7 Passive Circle 5 rear panel fig 2 7 CIRCLE 3 8 Key features passive and active 8 Key features active 8 Active Circle rear panel fig 3 9 Passive Circle rear panel fig 4 9 EE 10 Key features active 10 Active Circle 1 sub woofer rear panel fig 5 11 LOUDSPEAKER CONNECTION 12 Circle 5 and Circle 3 active 12 Circle 5 and Circle passive 12 Circle 1 active sub woofer 12 5 1 mode method 1 fig 6 13 5 1 mode method 2 fig 7 13 B MOE Ir Bh An Eet dees AE 13 LOUDSPEAKER POSITIONING 14 Stereo loudspeaker placement 14 Suggested stereo loudspeaker placement fig 9 14 Surro
5. 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 Visit HHB on line at http www hhb co uk guaranteeing full power over a long service life TEET XLR inputs female L C R L rear R rear Sub woofer effects channel XLR outputs male L C R L rear R rear all band limited to 120Hz to connect to satellite speakers European model 220 240V 50Hz U S Canadian model 110 120V 60Hz Adie wale ames 465mm x 414mm x 414mm 18 3 x 16 3 x 16 3 etd 21 5kg 47 3105 each net 27 0kg 59 4165 packed in singles ET Durable black paint finish with perforated purple grille interstage Phistersvej 31 2900 Hellerup Danmark Telefon 3946 0000 fax 3946 0040 www interstage dk pro audio with a smile Trademarks are the property of their respective owners
6. connection to Circle 3 or Circle 5 speakers This mode allows optimum flexibility with both stereo and LCR source formats OUTPUT FROM INPUT TO DECODER MIXER LOUDSPEAKERS a Qi R mepe 9 L baa C pen R LS lt gt RS LS j RS Optional Figure 8 B mode switch in B position The three controls on the HHB Circle 1 allow simple configuration for each particular surround setup An input sensitivity level adjusts the volume of the sub woofer without affecting any of the other signals that may be passing through the filter stages of the unit The bass boost control provides approximately 10dB of boost in a half octave centred at 33Hz The function of this is to compensate for the frequency response of the human ear when listening at low levels The boost control should be normally be set near minimum when listening at mid to high levels but the boost level may be increased as the listening level is reduced Please note that the HHB Circle 1 is not designed to be used at full boost and very high level Some user adjustment is required to obtain the optimum balance between the preferred sound and power handling power capacity of the system The phase control is provided to enable smooth integration of the Circle 1 with other loudspeakers in the surround system this control alters the phase of the sub woofer signal through 180 enabling the sub woofer to blend
7. of any surround sound monitoring system Increases the bandwidth of a loudspeaker system down to 33Hz Exceptionally low colouration and distortion 300mm 12 paper pulp bass mid driver Low moving mass for fine transient response characteristics Air cooled magnet system Very large voice coil and long throw suspension 10 Flexible configuration possibilities with either direct input of sub woofer signal 5 1 mode or low frequency information extracted from the left centre and right signal paths and fed internally to the sub woofer input within the Circle 1 B mode Built in 5 channel Sallen and Key active filters remove the need for external filtering Low noise low distortion power supply with long life smoothing capacitors Variable phase control allows blending with existing speaker room combinations Variable bass boost control achieves optimum bass balance across a range of differing listening levels lower listening levels require bass boost according to psychoacoustic theory Input sensitivity control allows matching of sound balance across the whole surround monitor system Built in temperature overload sensor Rigid ported cabinet finished in durable black paint Distinctive purple grille Figure 5 Active Circle 1 Sub Woofer Rear Panel INPUT SENSITIVITY LF BOOST 5 1 MODE SUB INPUT FRONT LEFT FRONT CENTRE FRONT RIGHT FRONT LEFT INPUTS
8. qualified electrician Service Should a HHB Circle monitor require service it must be taken or sent to an HHB authorised dealer Please retain the original packing for possible future use and ensure the unit is suitably protected during transit The manufacturer cannot accept responsibility for damage caused during transportation In order to register ownership it is essential that you complete and return the user registration card supplied with this product All components used in HHB Please record the following details To prevent fire or electric shock hazard do not operate this equipment outside or expose to rain or moisture Do not Operate when disassembled or if the cabinet is damaged exposing the internal electronics When replacing the fuse in the active Circle 5 Circle and Circle 1 use only the correct rating of fuse a 2A slow blow type for the Circle 5A and Circle 1A or a 630mA slow blow type for the Circle 3A The fuses used must conform to local safety regulations As the performance of a new loudspeaker will improve after the first few hours of use due to the bedding in of the cone materials and suspensions it is recommended that new speakers should be driven at a moderate level for a few hours before critical listening is attempted BEWARE HHB Circle studio monitors are capable of producing high sound pressure levels Be careful not to monitor at high volumes for long periods as this could cau
9. with the other loudspeakers in the system whatever your monitoring requirements The phase control should be adjusted to obtain the best smoothest balance between the deep mid and upper bass along with the mid and high frequencies in the Circle surround system with the entire system installed and in the correct positions 13 Loudspeaker Positioning Whether you have a stereo or Surround sound system correct positioning of loudspeakers in the room is essential as this will greatly affect the accuracy of the reproduced sound Speakers radiate sound from all directions and therefore placing them against walls or on the floor is not advisable HHB Circle 5 and Circle 3 monitors are optimised for use under free field conditions so for the best results consider the following points when setting up your loudspeaker system Stereo Loudspeaker Placement The Circle 5 and Circle loudspeakers should be placed upright on stands away from boundaries to reduce reflections Do not place them on their sides as the response at the crossover frequency will be less accurate Both speakers should be the same distance from the listening position The Circle 5 and Circle loudspeakers should be slightly angled in towards each other so as to point towards the listening position and placed at a height where the listener s ears are level with the tweeters e Ideally the two loudspeakers and the listener should sit at the c
10. TUNG Vor dem ffnen des Ger tes Netzstecker ziehen COMMUNICATIONS MANUFACTURED IN THE UK LONDON LOS ANGELES e TORONTO SERIAL NO GE THIS EQUIPMENT MUST BE EARTHED NO USER SERVICEABLE PARTS FUSE F1 0A 110 117V 50Hz INDOOR USE ONLY F630mA 230V 50Hz Circle 1 The Circle 1 active sub woofer is the perfect loudspeaker to complement the Circle 5 and Circle 3 in surround sound applications Faithfully reproducing all the low frequency effects found in films and music the HHB Circle 1 greatly improves the bandwidth of loudspeaker systems With its built in active crossover any combination of up to five full range loudspeakers depending on the application may be connected to the Circle 1 allowing its on board filters to remove extreme low frequency content from the other signals preventing their overload whilst attempting to reproduce these high energy frequencies With this arrangement no additional filtering is needed Dedicated sub woofer signals may be sent directly from a mixing console or multitrack recorder to the Circle 1 5 1 mode or the internal circuitry can extract the low frequency information from the left centre and right input signals B mode The Circle 1 s paper pulp 12 LF driver is mounted at the top of the cabinet displacing air out of the acoustically optimised front port Key Features Circle 1 Designed for use as an integral part
11. anadian model 110 120V 60Hz Dimensions HxWxD 270mm x 175mm x 220mm 10 6 x 6 9 x 8 7 Weight 5 0kg 11 0105 each net 11 0kg 24 216 packed in pairs gross teats eae Active bandpass twin chamber reflex sub woofer 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 22 10 seek steven EEN d dates EEN 33Hz 120Hz 3dB in free space Sensitivity For Full Output input sensitivity at max sub woofer effects channel 1V RMS Ehel 0550 ZER A RA EES E ER dE dE EE Input sensitivity LF boost phase 5 main channels pass through Sallen amp 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 100W min programme Anti thump on off circuitry Regulated low noise low distortion power supply with long life capacitors EE E ue EE Dimensions EE dk Communications Ltd 73 75 Scrubs Lane London NW10 6QU UK Tel 0181 962 5000 Fax 0181 962 5050 E Mail sales hhb co uk HHB Communications USA LLC 1410 Centinela Avenue Los Angeles
12. e three front channels and two surround channels each placed upright on stands an equal distance from the listening position A sub woofer is often used to improve the system s low frequency response A typical setup may consist of five HHB Circle 5 loudspeakers with a Circle 1 sub woofer Ensure that all five loudspeakers are positioned at the same height ideally this will be so that the tweeters are level with the listener s ears Due to the consistent sound quality of the Circles it is possible to mix Circle 5s and Circle 3s in the same surround setup The front three speakers left centre and right may be Circle 5s with a pair of Circle 3s used for left surround and right surround Figure 10 Suggested surround loudspeaker placement Widely used in films and pop music extreme low frequency effects as produced by the HHB Circle 1 are often felt rather than actually heard e Since the Circle 1 sub woofer will only produce low frequencies often with a wavelength of up to ten metres it is often hard to localise enabling the speaker to be placed on the floor or slightly to one side of the listening position without altering the overall spatial image Distance from the listening position to each of the loudspeakers should always be the same If the listener is at the centre point of an imaginary circle the speakers should all lie on the circle s circumference There are no hard and fa
13. e to have a cable with a wide cross sectional area since this will reduce the electrical resistance If the cable is too thin the resistance rises and heating may occur Where possible try to use the same length of cable for each speaker Circle 5 amp Circle 3 Active Audio connection to the active HHB Circle 5 and Circle 3 is via balanced XLR or unbalanced RCA phono The audio should be connected to one or the other input not both with the input switch being set accordingly Note that in the active Circle 5 this switch only balances and unbalances the inputs and does not actually switch between the two Signal should never be connected to both inputs simultaneously since the output from the loudspeaker will be a combination of both inputs The active Circle 5 and 3 should be connected to a suitable mains power supply via an IEC connector Power should be switched off when connecting or disconnecting any signal to or from the loudspeakers or when changing 12 the position of the selector switch since the loudspeakers and internal amplifiers may be damaged When audio cable runs are long about ten metres or more approximately thirty feet or there is electromagnetic interference in the vicinity of the cable from a motor for instance it is advisable to use balanced XLR cables so as to avoid any induced noise The master volume control on the active Circle 5 and 3 acts as a sensitivity control When at its highest the input
14. ecision 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 ele ea ee pean Switchable XLR RCA phono Main Input Voltage European model 220 240V 50Hz U S Canadian model 110 120V 60Hz Weight 12 6kg 27 716 each net 25 6kg 56 310 packed in pairs gross 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 60W bass 30W tweeter Active Crossover Crossover point at 3 5kHz Sallen amp 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 C
15. ignals directly from the mixing desk etc OUTPUT FROM INPUT TO DECODER MIXER LOUDSPEAKERS Figure 6 5 1 mode method 1 switch in 5 1 position In the second connection method 2 all the monitor signal outputs normally left centre right left surround and right surround are connected to the inputs on the HHB Circle 1 and the outputs are fed to the loudspeakers This method filters the low frequencies below 120Hz from the loudspeaker feeds The sub woofer is always driven from the SUB input it receives no low frequency information from the other five inputs This connection method is widely used since by removing the extreme low frequencies the five full range loudspeakers can be utilized more efficiently This method of signal connection makes the most of the Circle 1 s high quality filters OUTPUT FROM INPUT TO DECODER MIXER LOUDSPEAKERS Figure 7 5 1 mode method 2 switch in 5 1 position Using the Circle 1 in B mode the bass frequencies are extracted from the left centre and right inputs and not from the SUB input The left and right monitor signals or left centre and right are connected to the XLR inputs and the bass below 120 Hz is filtered from these signals equally mixed together and fed to the sub woofer The rest of the frequency spectrum from these inputs is output from the left and right or left centre and right XLRs as normal for
16. ing bass mid driver with a paper pulp cone optimised for smooth accurate sound reproduction with minimum distortion Individually tested ferro fluid cooled soft dome tweeter Magnetically screened for use close to video computer monitors Rigid seamless cabinet finished in durable black paint Key Features Circle 3 Active 60W LF 60W HF integral amplifier pack Switchable inputs either balanced XLR or unbalanced RCA phono Power amplifier contains anti thump on off circuitry Anti resonant amplifier mounting Low noise audio integrated circuits Advanced surface mount computer assembled construction Toroidal transformer for added headroom and low hum field Individually calibrated Gallen and Key active filters Controlled crossover characteristics to eliminate listening fatigue during long recording or mixing sessions Figure 3 Figure 4 Active Circle 3 Passive Circle 3 Rear Panel Rear Panel MASTER VOLUME HHO HHB COMMUNICATIONS MANUFACTURED IN THE UK LONDON LOS ANGELES e TORONTO 2 8 LIIL 0 10 IMPEDANCE SERIAL NO B OHMS ELECTRONICALLY e BALANCED NU UNBALANCED INPUT PHONO IN 1 SCREEN AN J 2 HOT 3 COLD BALANCED XLR INPUT UNBALANCED PHONO INPUT CAUTION Risk of electric shack DO NOT OPEN ATTENTION Risque de choc electrique NE PAS OUVRIR S ACH
17. is at maximum sensitivity and the amplifiers will be fully driven by an input of 1V The best way to set this correctly is to ensure that the monitor output of the mixing desk or other equipment that is driving the speakers is set to produce a peak output of 1V The master volume control also allows for balancing between loudspeakers ideal for use in a Surround sound environment Circle 1 Active Sub Woofer The Circle 1 is an active sub woofer containing built in amplification and active crossover circuitry designed especially for use with Circle 5 and Circle 3 loudspeakers a surround sound setup Its flexible input and output capabilities allow quick and simple connection to the other loudspeakers The HHB Circle 1 sub woofer has two distinct modes of operation set by a switch on the rear panel these modes are 5 1 and B The system is designed for decoded or discreet 5 1 reproduction but also caters for earlier formats of surround sound or bass enhancement in a conventional stereo system Using the HHB Circle 1 in 5 1 mode there are two connection methods in a surround sound system With method 1 the separate sub input allows direct connection from a dedicated line level low frequency effects or sub channel on a surround sound decoder mixing desk or a multitrack recorder Using this method only one physical connection is made to the sub woofer the other five loudspeakers are sent their own discrete s
18. istortion And with controls for master volume on the active Circle 3 and 5 along with mode switching input sensitivity LF boost and phase controls on the Circle 1 all Circle monitors are fully adaptable for every studio or project installation Whether you possess a stereo pair of loudspeakers or an entire surround sound system the HHB Circle studio monitors are simple to set up and simple to use With their many flexible options they offer a tailor made solution for any monitoring application These operating instructions for the Circle monitors explain the fundamentals of loudspeaker connection and positioning providing clear and simple information for monitor installation whatever your requirements 4 Precautions The active HHB Circle loudspeakers are simple to install but like all electrical equipment care must be taken to ensure reliable safe operation The following points should always be observed This equipment must be earthed In a situation using multiple speakers the mains power should be derived from a central set of outlets that have a solid ground connection Should a problem exist with hum loops the ground connections on the XLR input connectors should be disconnected not the mains earth connection The mains earth connection must NEVER be removed from these speakers Ensure the speakers are the correct voltage for the available mains supply e All mains wiring should be installed and checked by a
19. orners of a triangle where all sides are of equal length e The listener should not sit too close to the speakers e within this imaginary triangle since the important centre image sweet spot can be greatly affected when listening in this position The loudspeakers should be placed away from corners and walls more than one metre away approximately three feet is ideal since there may be unwanted interference patterns caused by the reflections of the signal from the walls which will colour the low and mid frequencies giving the impression of extreme bass warmth and unnatural midrange At these low frequencies the sound from the loudspeakers radiates in all directions and reflects off any hard surfaces to combine with the direct sound At higher frequencies sound from the loudspeakers is more directional causing less of a problem with interference Avoid placing the Circle 5 or Circle 3 studio monitors on top of a mixing console since this will adversely affect the frequency response Some of the sound output will reflect off the surface of the console interfering with the direct sound from the loudspeakers Instead position the speakers on stands slightly behind and above the console Figure 9 ae Suggested stereo oudspeakers loudspeaker placement NL Listener 14 Surround Loudspeaker Placement The loudspeaker arrangement for surround sound monitoring may compris
20. se hearing damage Circle studio monitors are guaranteed against faulty materials or workmanship for a period of one year from the date of purchase This warranty will become void if the product has been misused modified or tampered with in any way HHB shall not be liable for any consequential or incidental damages due to the failure of this product In the unlikely event of a product failure please contact your local dealer GET Ur TEE Date purchased 3 AA dek er doy vaca dante dee NA de de PE duke Ae de A deb dee Ae Ah deet es Dealer 5 Circle 5 As part of a complete monitoring system HHB Circle 5 studio monitors will deliver the clean highly accurate sound required Their reliable sound output and wide flat frequency response makes them suitable for the highest quality audio monitoring applications The Circle 5s feature a solid state Polyswitch to protect the tweeter from excessive input Unlike other protection circuits which limit power to the tweeter affecting the overall balance of the sound in a way which may not be immediately obvious to the listener the Polyswitch in the Circle 5 cuts all power to the tweeter and illuminates a red warning LED After a couple of minutes to cool off the switch automatically resets having saved the tweeter from overload and subsequent damage Key Features Circle 5 Passive amp Active Detailed acc
21. st rules as to the exact placing of the left and right surround loudspeakers this circular diagram is merely intended as a guide In fact many recording and mixing studios have their surround loudspeakers mounted on moveable trolleys enabling each client to place them in their preferred position 15 TECHNICAL DATA Circle 5 Passive Transducer System Ported 2 way monitor loudspeaker Drive UNIS beanie ba LF Custom 200mm 8 polymer 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 LE EE 87dB 1W 1m Suggested Amplifier Rer EEN saat 50 200W IMPEDANCE 8 Ohms nominal Power Handling Programme 120W REN Pro grade components on fibreglass PCB critically damped 2 6kHz crossover GOAMECTONS sie ate pe EE ene dea Binding posts Dimensions HxWxD 420mm x 255mm x 300mm 16 5 x 10 0 x 11 8 Weight 10 0kg 22 0165 each net 20 4kg 44 916 packed in pairs gross FINS eeneg Durable black paint finish Circle 3 Passive TransqucerSysteM 24 AN sacks 2 way monitor loudspeaker
22. und loudspeaker placement 15 Suggested surround speaker placement fig 10 15 TECHNICAL DATA 16 Introduction HHB Circle studio monitors are designed and built with HHB s customary attention to detail More than 20 years experience and a number of unique innovations have combined to produce studio monitors capable of performing in the most demanding professional environments The Circle 5 and Circle 3 available in both active and passive versions together with the Circle 1 sub woofer are perfect for use in a variety of stereo and surround sound professional monitoring applications Extremely responsive they deliver every performance with power and clarity The HHB Circles are a true family in every sense both in character and appearance Great consistency in their design and manufacture has resulted in a distinctive Circle sound uniformly matched across the entire range enabling Circle 3s and 5s to be freely combined in any surround setup without detrimental effect to the reproduced sound Striking purple cones or grilles and a durable black paint finish on all models further strengthen the family resemblance With their high quality audio components and low distortion filters the HHB Circle studio monitors are full of features The cone on the Circle 5 is formed from an injection moulded polymer with varying thickness across its diameter for a grain free texture and minimal cone d
23. urate and dynamic sound both and off axis e Tight controlled low end performance Accurate bass treble driver time alignment 200mm 8 bass mid driver with a unique injection moulded cone for increased dynamics and minimal bass colouration Individually tested ferro fluid cooled soft dome tweeter Solid state Polyswitch tweeter overload protection Shielding antimagnets allow use close to video and computer monitors Rigid seamless ported cabinet finished in durable black paint Key Features Circle 5 Active e 120W LF 70W HF integral amplifier pack Switchable inputs either balanced XLR or unbalanced RCA phono Push Pull amplifier design for tight controlled low end performance Power amplifier contains anti thump on off circuitry Extra large toroidal transformer for added headroom and low hum field Individually calibrated low Q Gallen and Key active filters eliminate mid band peaks resulting in a sound that doesn t tire the listener even after long periods Long life smoothing capacitors Massive heat sink for effective heat dissipation Figure 1 Active Circle 5 MASTER VOLUME Rear Panel 4 6 A GN UNBALANCED O TL UNBALANCED PHONO INPUT FL BALANCED XLR INPUT ELECTRONICALLY BALANCED INPUT 1 SCREEN 2 HOT 3 COLD 120W LF 70W POWER AMPLIFIERS ULTRA PRECISION ACTIVE FILTERS HIGH PASS FILTER LED TRIPCHIP
Download Pdf Manuals
Related Search