Obbligato Series: The Libretto






back
to Obbligato Series Showroom
 

 



The Libretto Centre Channel loudspeakers offer the ultimate in centre channel performance. It employs two 5” Pentacone™ woofers, one 1” silk dome tweeter and one 4” Mini Mid range Coupler. The 5” woofer and Mini Mid are our own design and the cones have a patented glass fibre weave. The cones are actually 5 sided. Hence, the name, Pentacone™. The cone design lowers resonance in the critical “mid-range” region, 160Hz-1280Hz. The baskets are cast magnesium with pole venting. A butylized Meuller surround of varying thickness further reduces resonance and is an integral part of the design. This allows for a smooth transition from the woofer to our Mini Mid.

The 1” tweeter is a masterpiece from Denmark. The 26mm coated diaphragm is made of fabric and silk. It has a neodymium motor, a copper clad aluminum voice coil and has a vented rear chamber. The tweeter has an aluminum phase plug. This design permits improved sensitivity allowing the tweeter to act as a perfect piston beyond 23KHz. The frequency response of this tweeter actually extends beyond 46KHz. Dispersion and power handling are excellent.

Conventional centre channel designs, a single tweeter between 2 woofers, generally exhibit poor off-axis dispersion. Output is often sown more than 8db at 30 degrees. The Libretto’s unique off-axis design virtually eliminates this problem. At 30 degrees off- axis, output is less than 1.5db. we have added an adjustable “presence control” to the crossover design. Output from 300Hz to 3000Hz may be reduced up to 8db . this adjustment allows for perfect matching to the characteristics of any listening room. being able to alter the output has another distinct advantage: the user can alter the loudspeaker’s “power response”. This is extremely important if the Libretto is to be used with any other brand of loudspeaker.

 

 



TECHNICAL SPECIFICATIONS

 

 

 
 


Nominal
Impedance
 

4 ohms
 


Sensitivity:
1m 2.83V pink noise,
C weighting
 

88 dB
 


Sensitivity:
1m 2.83V pink noise,
C weighting
30˚ off-axis
 


86.7 dB
 
 


Operational
Frequency Response
 


85 Hz - 30 KHz
 
 


Weight (kg)
 

15 kg
 


Weight (lb)
 

33.5 lbs
 
Dimensions (H
x W x D) cm.
 
19.0 x 59.3 x 29.4
 
Dimensions (H
x W x D) in.
 
7 5/8 x 23 3/8 x 12.0
 

 


Call us on (905) 294-9383 | E-mail us at
info@angstromloudspeakers.com
We will get back to you. .