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Linnenberg ALLEGRO, Owner'S Manual

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Linnenberg ALLEGRO Owner'S Manual Download Page 12

 

12 

Specifications 
 
 
 
 
 
Input sensitivity : 

1,5 V

 rms

 

Input 
impedance: 

22k Ω (single ended RCA) 

44k Ω (balanced XLR) 

Gain : 

22,8 dB 

Power output : 

55W/8Ω  90W/4Ω  105W/2Ω 

Peak 

output 

voltage : 

68 V 

pp

 

Peak 

output 

current : 

+/- 20A continuous 1 : 10 

cycle 

Frequency 
range : 

0  … 350 kHz 

with filters 

0 … 1MHz 

without filters 

Full 

power 

bandwidth : 

0 … 300kHz 

Rise time : 

700ns 

Damping   
factor : 

> 500 

Signal  to  Noise 
ratio (SNR) : 

116dB linear BW = 30kHz 

120 dB (A) 

Distortion 

and 

noise (THD+N) : 

0,004% 

 
 
 
(Table 1) 
 
 
 

Summary of Contents for ALLEGRO

Page 1: ...Owner s Manual ALLEGRO ...

Page 2: ...2 ...

Page 3: ...ions It features high current capability and operating speed not to be found in IC amplifiers aka gain clone or any class D design Clever construction techniques enabled us to build an amplifier with high packing density consequently making the signal and power paths extremely short Thank you for purchasing the ALLEGRO ...

Page 4: ...4 Controls front Figure 1 Front side power on off switch Blue power on LED and status indicator ...

Page 5: ...5 Connections rear Figure 2 63A binding posts for speaker connection black minus red plus XLR RCA input select switch XLR female input RCA cinch input IEC appliance inlet and hard wired mains switch ...

Page 6: ...prevent overheating Place the unit on a solid flat level surface such as a shelf or directly on the floor Virtually there are no limitations on where to position your ALLEGRO We suggest positioning the unit so that the connecting cables remain short Before connecting the ALLEGRO to your mains the first time check if the indicated mains voltage is in accordance with your home supply Never plug an 1...

Page 7: ...nfiguration The toggle switch is used to select the chosen input When you have a choice a properly implemented balanced connection will offer higher sound quality than a single ended connection The amplifier can be driven by a preamplifier or directly from a line level source that has a volume control Connect your loudspeakers to the amplifier The speaker cable can be connected via spade plugs or ...

Page 8: ... the back side since the standby power consumption is less than 0 5W As it is common practice disconnect ALLEGRO from the mains during a thunderstorm or when going on vacation Protection circuits ALLEGRO provides comprehensive protection for both the amplifier and your loudspeakers including faults that may occur in your source components If the unit is operated at high playback levels with insuff...

Page 9: ...ing the front panel switch will be inoperative In order to revert to normal operation the fault cause must be rectified There after one has to cycle the rear mains switch from 1 to 0 and then back to 1 again If the error message persists the amplifier hasn t cooled down sufficiently or the unit itself is faulty If the DC error only shows up when the source is connected the source component is faul...

Page 10: ... attempt to short the fuse holder Normally the fuse should never blow if it has it is a sign of a serious fault condition Further investigation is needed Mains voltage Altering the mains input voltage range from 115V to 230V or vice versa is done by changing the fuses according to the figure 3 below You will need 1x 6 3AT for 230 V operation and 2x 6 3AT for 115V operation Never attempt to apply a...

Page 11: ...11 Figure 3 220 230V mains voltage use 1 x fuse 6 3AT in place F1 110 115V mains voltage use 2 x fuse 6 3AT in place F2 and F3 ...

Page 12: ...utput 55W 8Ω 90W 4Ω 105W 2Ω Peak output voltage 68 V pp Peak output current 20A continuous 1 10 cycle Frequency range 0 350 kHz with filters 0 1MHz without filters Full power bandwidth 0 300kHz Rise time 700ns Damping factor 500 Signal to Noise ratio SNR 116dB linear BW 30kHz 120 dB A Distortion and noise THD N 0 004 Table 1 ...

Page 13: ...13 THD 1dB full power output 8Ω vs frequency Figure 4 THD 1kHz 8Ω vs power output Figure 5 ...

Page 14: ...14 Square wave 10V 8Ω 20kHz Figure 6 ...

Page 15: ...15 ...

Page 16: ...l unaltered factory serial number must be present on the outside of the unit and must be clearly legible The serial number is an essential part of our conformity declaration and therefore of the approval for operation of the ALLEGRO The serial numbers on the unit and in manual must not be removed or modified and must correspond Furthermore the unit has been found to comply with the limits for a Cl...

Page 17: ...sed or handled other than in accordance with the instructions in the owner s manual abused or misused damaged by accident or neglect or in being transported or the defect is due to the product being repaired or tampered with by anyone other than LINNENBERG ELEKTRONIK The product must be packed in its original box and returned to LINNENBERG ELEKTRONIK by the customer at his or her sole expense LINN...

Page 18: ...he unlikely event the above product fails to meet the above specifications and the above conditions have been met the purchaser s sole remedy under this Warranty shall be to return the product to LINNENBERG ELEKTRONIK where the defect will be rectified without charge for parts and labour This Warranty is for the sole benefit of the original purchaser of the covered product and shall not be transfe...

Page 19: ...19 ...

Page 20: ...20 Linnenberg Elektronik 2016 ...

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