GURU PRO AUDIO

SPEAKER

QM60
The QM60 was originally designed as a laboratory instrument for a project researching the properties of human hearing. Reproducing the acoustic signals used for this project required a neutral wide-band speaker with accurate reproduction of timbre, taking into account and compensating for the inherent colourations in the stereo system itself, generated in the process of phantom projection. It also required a very low distortion as well as a capability to reproduce wave shapes with a very high accuracy. Although this speaker may seem over qualified for hifi-use, the very same properties that enables them to reproduce artificial test signals in the four domains timbre, dynamic, time and space, are to a high degree beneficial when reproducing signals as complex as music. The difficulties in reproducing music should never be underestimated. The nuances are not no be ignored no matter how small and delicate they are. 
 
SPECIFICATION:
 
TYPICAL IN-ROOM RESPONSE:
20 Hz–22 kHz
 
SENSITIVITY:       
88 dB (2,83 V, 1 m)
 
NOMINAL IMPEDANCE:   
7 Ω (min 6 Ω). Mean value: 10 Ω
 
CROSSOVER FUNCTION:   
800 Hz–7 kHz. Non-textbook function
 
CROSSOVER CLASS:       
Passive
 
RECOMMENDED AMPLIFIER POWER:     
10 W-250 W
 
PEAK POWER HANDLING, >300 HZ:     
>500 W
 
ENCLOSURE TYPE:       
Helmholtz resonator
 
ENCLOSURE MATERIAL:     
MDF
 
DRIVERS:    
1×28 mm (1,1 in.) dome tweeter, 1×176 mm (6,9 in.) doped polymer cone
 
IDEAL LISTENING DISTANCE:      
2 – 8 m
 
DIMENSIONS (WxDxH):       
312×351x945 mm
 
NET WEIGHT:       
30 kg
 
PLACEMENT:    
Against a wall (or rather 0-2 in. from it) toed in, and on the floor
 
FINISHES:     
Matte Black, Black Piano Laquer, White Laquer, or a selection of veneer