background image

5

started with the debut of our highly acclaimed D 870 speaker. 

The reason for choosing this confi guration is that it grants you the best of two 

worlds: The tweeter and mid-woofer reproduce the full frequency range, so, this 2 

way system delivers the coherent, harmonious and smooth sound typical of tradi-

tional 2-way systems. 

Then the additional woofer(s) blends in below 150Hz to add the extra cone area 

and power handling needed to give full fi delity in the low bass.

The dual bass refl ex confi guration means that the cabinet is divided into two cham-

bers – one housing the tweeter/mid-woofer and one the designated woofer(s).

This gives several advantages: First of all the sound pressure inside the cabinet from 

the woofer does not infl uence the mid-woofer and vice versa. This of course elimi-

nates colouration and so results in cleaner sound reproduction. 

The two chambers are identically tuned but the bass cabinet features a larger port 

(both in diameter and length) to effortlessly provide the considerable airfl ow re-

quired to reproduce deep bass. 

The upper set of of the heavy-gauge, matt chromated bi-wiring/amping terminals 

connect to the tweeter while the lower terminals connect to the mid-woofer and 

woofer. This split was chosen in order to separate the heavy current fl ow in the 

midrange and bass from the more delicate signal going to the tweeter. The bi-wir-

ing/amping facility gives you lots of fl exibility to tune the sound balance.

C 80 CEN

C 80 CEN centre channel speaker is a 2-way, bass-refl ex system featuring two 6in 

HCC woofers and a 1in DTT/WaveGuide tweeter.

The C 80 CEN can be placed on a speaker stand, book-shelf or on a TV (in the sup-

plied rubber cradle), allowing the arc-shaped speaker to be angled towards the lis-

tening position and, just as importantly, ensuring stable placement of the speaker.

The C 80 CEN is of course magnetically shielded to enable placement in the vicinity 

of a normal CRT type TV.

C 80 SUR

The C 80 SUR dipolar surround speaker is deliberately designed to deliver a diffuse 

sound, giving you the feeling of being enveloped in sound. Dipolar loudspeakers 

usually suffer, however, from a lack of effi ciency in the deep bass area. To compen-

sate for this fact the C 80 SUR is equipped with a special Jamo feature called XBR 

(eXtended Bass Response). XBR inverts the phase on one of the two woofers so that 

at frequencies below 250Hz it functions according to the bipolar principle.

Using a combination of di- and bi-polar principles not only ensures ultimate diffuse 

Summary of Contents for C 80 SUR

Page 1: ...TECHNICAL DESCRIPTION Jamo C 80...

Page 2: ...2 Contents General description 3 The products 4 Drivers 11 X over 17 Cabinets 17 Specifications 18...

Page 3: ...y the iconic Jamo D 5 and E 8 speakers employ ing the symmetrical arc shaped cabinets from the former and the curved top from the latter This combined with well established Jamo driver technologies DT...

Page 4: ...back box this speaker works very well when used without a subwoofer If you want some extra bass e g for a surround sound solution just partner it with a subwoofer for extra low fre quency weight The...

Page 5: ...ile the lower terminals connect to the mid woofer and woofer This split was chosen in order to separate the heavy current flow in the midrange and bass from the more delicate signal going to the tweet...

Page 6: ...ogy based amplifier delivers no less than 1800W more than enough to secure sufficient headroom even for a subwoofer reaching down to 20Hz 6dB Amplifier The important thing with subwoofer amplifiers is...

Page 7: ...ge limited amplifier it possesses tremendous dynamic power capability MFB Motional Feed Back servo control We have given precise timing extremely high priority in the C 80 design To enable the relativ...

Page 8: ...mpensates for the room influence at low frequencies as any room am plifies the lowest frequencies The magnitude of the room s amplification depends on the actual room and where you are positioned norm...

Page 9: ...tandby mode thereby missing the start of a new action packed sequence like for example an explosion or a kettledrum Besides the auto on standby mode we have there fore implemented a mode were the subw...

Page 10: ...try do the daily job for you Phase and Cut off controls Place the subwoofer where it is most convenient the controls ensure that the sound from the subwoofer can be adjusted to blend seamlessly with t...

Page 11: ...rm dispersion pattern in the treble and midrange frequencies In general the dispersion gets narrower the higher the fre quencies and this applies to both midrange and treble Consequently in the area w...

Page 12: ...The voice coil former is made of aluminium for optimum heat dispersal The voice coil is made of copper plated aluminium wire This is because aluminium weighs less than copper but the copper plating i...

Page 13: ...vy demands on the diaphragm materials stretching and compression properties the composite fibre material is composed of a special mix of different types of fibres and treated with a tough hardening re...

Page 14: ...ere it is needed around the voice coil Last but not least the very rigid material ensures that the heavy magnets and the voice coil are always perfectly aligned with the voice coil in the exact centre...

Page 15: ...exten sion of existing techniques to reduce distortion in electrodynamic loudspeaker drivers When a voice coil is moving in and out of a magnet gap it changes induction When the coil moves inward the...

Page 16: ...ice coil wire results in the so called B L Product In popular you could call this the size of the engine in a loudspeaker Sub Woofer The 10in woofer features a vented magnet system and a 50mm 2in alum...

Page 17: ...ple layers of MDF board high frequency glued together for optimum surface contact between them The arc shaped design itself results in a much more rigid panel compared to a flat panel and to further i...

Page 18: ...45 24 000 Impedance Ohm 6 Crossover frequency Hz 2000 Dimensions HxWxD Mm 380 x 225 x 341 In 15 0 x 8 9 x 13 4 Name C 80 CEN System 2 way bassreflex Woofer mm in 2 x 155 6 Midrange mm in Tweeter mm i...

Page 19: ...19 www jamo com...

Reviews: