NHT Class D power amps

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soundboy

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NHT Class D power amps
« on: 3 Jan 2005, 07:59 pm »
Please excuse my ignorance, but Class D amps are digital, right?

If so, looks like NHT is releasing a couple of these power amps.  Given that NHT speakers are generally not so efficient, about 86 dBs, these new amps should be pretty good at powering more power-hungry speakers....the below is from their press release for CES:

301 and 302 Amplifiers
The 301 (SRP: $225) and 302 (SRP: $225) amps are designed to allow installers to recommend amplification options that combine simplicity of operation with value-added features. Both the 301 and 302 employ cool, highly efficient class D amplifiers coupled to reliable high-current linear power supplies.

The 301 is a 100 Watt mono amp that is ideal for high power applications, or installations where traditional stereo is not required, e.g. bathrooms, hallways, and outdoor speakers. The incoming two-channel signal is internally mixed to mono, allowing use of up to three paralleled high-fidelity single speakers. For traditional two-channel configurations, the 302 provides a robust 50 Watts-per-channel output.

Both the 301 and 302 include 12V trigger and RCA inputs/outputs, and are rack mountable with an optional accessory kit. Each model measures 1.75โ€ x 8.5โ€ x 10โ€ (H/W/D), and weighs 14 lbs.

mac

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Re: NHT Class D power amps
« Reply #1 on: 3 Jan 2005, 08:33 pm »
Quote from: soundboy
Class D amps are digital, right?

No, they are not.  They use PWM to switch the output transistors off and on based on the input signal.   Main advantages are high efficiency and depending on topology, excellent sound quality.

http://www.audioholics.com/techtips/audioprinciples/amplifiers/digital_classD_amplifiers.html

albee

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NHT Class D power amps
« Reply #2 on: 9 Jan 2005, 02:53 am »
Where did you find the info on NHT's new amps?  The A-2, available now, is not to be used with any other speakers other than NHT.  I checked the website and couldn't locate any 302 or such.  Thanks.

soundboy

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NHT Class D power amps
« Reply #3 on: 9 Jan 2005, 03:07 am »
The below link is where I found the info on the new upcoming NHT amps....

http://news.ecoustics.com/bbs/messages/10381/115943.html

eico1

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NHT Class D power amps
« Reply #4 on: 9 Jan 2005, 03:29 am »
The hi-end NHT dsp correction speakers use switching amps from Power Physics. They seem to be pretty good at designing class-d amps from what I heard, see if these models use them.

steve