CES/T.H.E. Show

CIAudio · « **on:** 2 Jan 2005, 03:16 am »

For those of you attending CES in Las Vegas, we'll be displaying with ModWright and Revelation Audio Labs at the St. Tropez, Room 2005.

Stop by to hear the new D-100 Class D monoblocks and also our new
VHP-1 headphone amplifier

Hope to see you there!

CIAudio · « **Reply #1 on:** 20 Jan 2005, 04:42 am »

Here are a few links to reports/photos from CES/T.H.E. Show in Las Vegas

6moons http://www.6moons.com/industryfeatures/ces05/ces_6.html

Audiogon http://live.audiogon.com/cgi-bin/ces.pl?channelislandsa&&ManuView&ST&st41&&&&&THE05

At the Alexis Park, our new D-100 Class D Monoblocks were used to power the new Line Arrays from Nearfield Acoustics/Pipedreams

Our VPC-1 Passive Preamp and VMB-1 Monoblocks were on display in the Thorough Bass Inc. room
http://live.audiogon.com/cgi-bin/ces.pl?&ST_2008&RoomView&ST&st61&&&&&THE05

Music Direct also ran demos of our new VHP-1 Headphone Amplifier

JLM · « **Reply #2 on:** 20 Jan 2005, 12:18 pm »

Dusty,

What are, "... all the shortcomings of conventional Class D designs" that the 100/180-watt into 8/4 ohms D-100 monos [$1,599/pr] are said to overcome?

Are we to understand that Paul Candy of 6moons will be reviewing the chip monoblocks?

What pre-amps do you recommend for the digital or chip monoblocks?

TIA

CIAudio · « **Reply #3 on:** 20 Jan 2005, 03:20 pm »

There are two main problems with conventional Class D amplifiers.

The first being they have load dependant frequency response...for example, a B&O ICE module is designed for a 6 ohm load. When driving a 4 ohm load, the high frequencies are rolled off, when driving an 8 ohm load, the high frequencies rise.

The second problem is high voltage DC at the speaker outputs. If an amplifier uses a single supply of 100vDC, it will have +50v at both speaker terminals. This is a shock hazard and cannot be approved by UL.
You'll notice many manufactuers use Speakon or similar connectors instead of binding posts to get around this.

The D-100's frequency response is independant of the load, and uses a split rail power supply with no DC voltage at the speaker outputs.

CIAudio · « **Reply #4 on:** 20 Jan 2005, 03:31 pm »

The VMB-1's are scheduled to be reviewed by Paul Candy at 6moons and Greg Weaver at Positive Feedback.

We also have reviewers asking for D-100's when we have enough to go around.

VMB-1's work best with a passive because of their hi gain(32db), but we have several customers using them with active preamps also.

D-100's are available in 26db gain for active preamps or 32 db gain for passives.

JLM · « **Reply #5 on:** 20 Jan 2005, 08:55 pm »

Thanks for the quick response Dusty.

You should update your website. It doesn't mention 26 and 32 dB gain options. I was always leary of passive preamps, especially with the low output of phone pre-amps and some DACs. But with the extra 6 dB of gain many of the passive worries should go away.

I'm sure many will be looking forward to the reviews.

mr_bill · « **Reply #6 on:** 20 Jan 2005, 11:29 pm »

Which modules do you use for the new digital monoblocks? B&O Ice or Tripath or something else?
Thanks,
Bill

CIAudio · « **Reply #7 on:** 21 Jan 2005, 12:50 am »

something else

CIAudio · « **Reply #8 on:** 26 Jan 2005, 05:15 am »

Here are links to more Show coverage from Positive Feedback
http://www.positive-feedback.com/Issue17/ces05gw.htm
http://www.positive-feedback.com/Issue17/ces05dc7.htm

John Kotches · « **Reply #9 on:** 27 Jan 2005, 12:55 pm »

Hypex UCD modules, but who's talking