B&O ICEpower Digital Amplifier Modules

(Disclaimer: this site is not affiliated with B&O in any way -- it is a regurgitation of preliminary information supplied by the manufacturer at AES 107 September 1999)

18/02/02 The information here is stale, but being kept for historical reasons. For current information please visit ICEpower's website.

pictures used with permission from Bang & Olufsen ICEpower a/s. Note that these represent the original design. For current designs please visit the ICEpower website.

Bang & Olufsen have spun out a company to develop & sell the patented digital amplifier technology developed by Dr. Karsten Nielsen. They plan on OEMing these modules (minimum 1000 pieces).

The development of this technology is well documented. I have reproduced a list from B&O of 21 papers pertaining to these amplifiers and their power supplies.

Note: i haven't found an official web site for these yet, although Dr. Nielsen was featured as one of the rotating personalities on B&Os site.



Specifications (edited) provided by ICEPower

   

ICE250A

ICE500A

ICE1000A

Output Power (RMS)

2.7 ohms

250

500

 

 

4 ohms

200

350

1000

 

8 ohms

110

200

500

Dynamic Range  

118 dBA

118 dBA

120 dBA

Supply Voltage (single ended)  

48V

65V

100V

Power Supply Rejection (PSRR)  

60 dB

Output referenced idle noise

A-weighted

 

100 microV max

140 microV max

Efficiency  

>92%

>93%

THD @ 250mW, 1kHz  

0.0005%

THD+N @ all frequencies & powers  

<0.05%

Size  

3.2"x3.2"x1"

3.6"x3.6"x1"

4"x4"x1"

Efficiency (no heatsinks required)  

>92%

Frequency Response (all loads)  

20Hz-20kHz +/-0.3 max/0.1 typical

20Hz-5kHz

IMD  

<0.003 typical

<0.005 typical

Full Power Bandwidth (-3 dB)  

40 kHz

25 kHz

Minimum Load  

2 ohms

Output referenced idle noise (typical)  

75 microV

80 microV

Standard Features  
  • Mute/Standby
  • Soft Start
  • DC Calibration (DCC)
  • True Soft Limitation (TSL)
  • Latching Overload protection
  • Input Filter
  • Clipping Indicator
  • No Heatsinks necessary
  • Load invariant
  • EMC compliamt
  • PIN and PLUG versions available

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