HHB comm CIRCLE SERIES - Manual (Page 6)

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 & Active
• Detailed, accurate and dynamic sound, both on and off axis
• 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
• 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 Sallen 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
Circle 5
6