Essence For High Res Audio

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Spend Your Money on Watts, Not A Big Chassis

Why are Class A and AB amps so expensive? The simple truth is, they convert electricity into watts with less efficiency. The lower the efficiency, the more heat the amp produces. The chart below vividly explains; Class A amps are 20% efficient, Class AB amps are 50% efficient. Both designs create more heat than power to drive your speakers. Since heat is the enemy of solid state devices, these amps must employ ways to get rid of it.

Extruded_Heat_SinkAudiophiles hate fans because they are noisy so manufacturers of Class A and AB amps are forced to use a lot of heat sink surface area to  pull the heat away from the amp.  The surface area requirement leads to a huge chassis to house the heat sinks and transformer. The cost of the materials to make the chassis to house all this heat sink is by far the biggest factor in why these amps cost so much today, its the packaging, not the transistors or circuit boards.  

Class D amps are 90% efficient so they dont need as much heat sink or the big chassis to house them, leading to lower costs for consumers per watt.  Further, Class D amps now sound better than the old fashioned Class A and AB amps we grew up with, they have lower distortion and noise and handle difficult loads better, with more slam and an ease of operation as they produce prodigious output for a lot less money.

Hi Res Audio brings us all the emotion of a live performance at home as never before with uncompressed 24/96-192K Blu-ray Concerts, Pure Audio Essence DPA-440 Silver low resDiscs, SACD/DVD-A, and Hi Res Downloads for the most unveiled sound and transparency in audio history. Class D is swiftly taking over the audiophile market, the only people still complaining about how they sound are the manufacturers who still make the Class A vacuum tube and Class AB solid state amps from the last century.  In a world getting hotter by the year, its really past the time to indulge in fantasies and rationalizations about which type of amp class sounds best.

With Class D you get 66% more output power for 1/3rd the price and lower your audio system’s power consumption by more than 70%, lowering your electricity bill as well.  In the chart below, note that the Class A amps use up the most electricity because they are on at full output all the time, yet 80% of that electricity is thrown away as heat.  

Comparison of Amp Classes Class A Class AB  Class D
Efficiency 20% 50% 90%
Electricity/Watts to drive a 200 watt Stereo Amp To Full Output 800 400 240

That leads us to  the Essence™ DPA-440 Class D Digital Audio Power Amp. It’s easy to find amps that can excel in one or two parameters but the DPA-440 is an amp that does everything well. With its wide open-loop bandwidth, extremely low-phase shift, almost non-existent noise, harmonic and intermodulation distortion independent of load, high current capability, low output impedance uniformly at all audible frequencies-it all adds up to incredible performance.

It goes without saying that I use an efficient business model that keeps the overhead low and that’s reflected in our low prices as well.  We dont do a lot of shows or use reps, and we keep the number of resellers low, after all, nobody knows more about our products than we do.

When combined with the Essence Electrostats and the HDACC Upsampling DAC Preamp, the system performance reaches the highest level of clarity and resolution attainable today, at a price that’s sure to make heads spin. The amp is our latest disruptive innovation.  Compare it to the rest of the competition:

Manufacturers: Essence DPA-440 Benchmark AHB2 Bel Canto Ref 150S CI Audio E∙200S NAD M22
Specifications:          
FTC* Rated Output RMS Watts Per Channel          
4 Ω 220 170 150 400 250
8 Ω 110 100 75 200 250
IM/THD+N <.003% <.003% <.003% <.02% <.003%
Signal-to-Noise Ratio < -100 dB < -113 dB <-110 dB Not Rated <-100 dB
Peak Output Current 40 amps 18 amps Not Rated Not Rated 50 amps
Damping Factor >1000 Not Rated >1000 Not Rated >800
Frequency Response ±.2 dB 20 Hz to 25 KHz ±.023@20Hz/-.32@20KHz ± 3dB 1.5 Hz – 90 KHz @4Ω Not Rated 3Hz – 30kHz (ref. -3dB)
Input Impedance: RCA/XLR 30KΩ / 47KΩ 50KΩ / 1MΩ 100KΩ / 200KΩ 100KΩ 17 Ω / 200 Ω
Input Sensitivity 1.6v RMS 2v RMS 1.1v RMS 2.0v RMS 1.6v
Voltage Gain** 30 dB Not Rated 27 dB 26 dB 29 dB
Idle Power 9w Not Rated 9.5w 32 w 40w
Dimensions 12″ W x 3.5″ H x 12.5″ D 11″ W x 3.8″ H x 9.34″ D 8.5″ W x 3.5″ H x 12″ D 14″ w x 2.75″ H x 10″ D 17″ W x 4″ H x 15″ D
Unit Weight 18 lbs 12.5 lbs 13 lbs / 6.5Kg 8.5 lbs 19.6 lbs
Shipping Weight 21 lbs 15 lbs 16 lbs 10 lbs 23 lbs
Dynamic Headroom 3 dB Not Rated Not Rated Not Rated 3 dB
Price $1,299 $2,995 $2,049 $2,500 $3,000
Warranty 3 Years 1 year 2 years 5 years 2 years
*Continuous Output Power as per FTC Rule          

Link to Amp Product Page

Bob Rapoport

Award-winning sales and marketing exec, consultant and product launch specialist to manufacturers of high performance audio / video products for consumer and professional applications. Holder of 2 patents for analog matrix surround decoding, winner of 12 CES Innovations Design & Engineering awards, recognized in the Who’s Who of American Inventors, and the leading advocate for adoption of the Blu-ray audio standard for music and movies; currently the CEO of Essence For Hi Res Audio manufacturing the HDACC Upsampling 24/192K DAC Preamp, DPA-440 Class D Power Amp, and online marketer in the USA for Acoustic Energy, Ceratec, Core Power Technologies, REVO, Verisonix Headphones, and ARCHT One.

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Main Office

Bob Rapoport, CEO
Essence For High Res Audio & More
St. Petersburg, FL
Phone: 727-580-4393
Email: bob@essenceelectrostatic.com

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