They're coming!!!!!

[LCSeminole]

I have always want to try a Class H power amplifier, wanted an IPS-1 or an MPS-2 for the longest time until I got the XPA-5/XPA-2. Now Big Dan is waving the XPR power amplifier line in front of us and I must admit, it's working as I'm already planning on two dedicated 20amp line for the home theater.

[Pauly]

Yeah, I'm very glad to see the Class H amps come back. I'm really happy with my XPA-5, but I really wish I had bought an MPS or IPS when they were still available. I gotta say though, I'm almost more excited about the class D Emo products. If it's affordable, I'm going to be very tempted to switch to class D for the HT.

[Deleted]

No wimpy lightweight puny class D amps for us macho dudes up in Worshington State.

[Pauly]

I don't know, Chuck. I owned the old Emo DMR-1, and it rocked! I still miss it sometimes. But it was too good for you Worshington folk. ;D

[Porscheguy]

Mar 22, 2012 19:08:04 GMT -5 @chuckienut said:

No wimpy lightweight puny class D amps for us macho dudes up in Worshington State.

+1 ;D ;D ;D ;D

[Porscheguy]

I'm pretty sure these are class H... They are all based on this topology.. and this model...

www.sherbourn.com/index.php/home-theater-products/home-theater-amplifiers/30-pa-7-350

[jamrock]

Well, if it is going to be class H, at least we are guaranteed a generous amount of power. And you might be right. But I think that Dan's leaning is towards class D. Here is a quote from his posts regarding his and Lonnie's approval for the production of a 7 channel amp:

"You can expect to see a couple of interesting products from Emotiva by the end of this year that take advantage of the efficiency and power density of Class D. And by the way, they sound wonderful too!!"

[Porscheguy]

Mar 22, 2012 19:54:27 GMT -5 jamrock said:

Well, if it is going to be class H, at least we are guaranteed a generous amount of power. And you might be right. But I think that Dan's leaning is towards class D. Here is a quote from his posts regarding his and Lonnie's approval for the production of a 7 channel amp:

"You can expect to see a couple of interesting products from Emotiva by the end of this year that take advantage of the efficiency and power density of Class D. And by the way, they sound wonderful too!!"

Not for this though... H it is..

[Deleted]

Mar 22, 2012 11:21:13 GMT -5 briank said:

Specs! Specs! Specs please !

Here is my very off the top of my flat head guess:



Power Output

353 watts/channel RMS; continuous; into 8 ohms; 20 Hz - 20 kHz;
<0.05% THD; any 2 channels driven (FTC)

At <1% THD at 1 kHz:
432 watts/channel RMS; ALL channels driven; into 8 ohms
505 watts/channel RMS; 3 channels driven; into 8 ohms
607.5 watts/channel RMS; 1 channel driven; into 8 ohms
648.5 watts/channel RMS; ALL channels driven; into 4 ohms
858 watts/channel RMS; 3 channels driven; into 4 ohms
1206.75 watts/channel RMS; 1 channel driven; into 4 ohms



S/N ratio:
> 104.7 dB (A-weighted)



Frequency response:
20 Hz to 20 kHz + / - 0.076 dB at 1 watt (- 1.9 dB at 80 kHz)

[Pauly]

XPR=Class H, some future products=Class D. So...Class A/B+Class H+Class D=something for everybody and a lot of happy customers.

[Deleted]

Yay

[Deleted]

Try doing an A/B comparison with a class D or H amp.

[jamrock]

Some folks are hoping that any 7 channel amp will be a low powered class D or H. They might make such amps but I have never come across any. I just think that a 7 channel class A/B is not in the runnings for several reasons. I still feel that it will be class D rated at 7 x 250 wpc. Weight = 53 lbs. 2/7 triggers. ThD < 0.05.

[SticknStones]

You guys are quite the class act this evening. ;D

[jamrock]

Where do you place the emphasis? Class or Act?

[Golden Ear]

When these amps get release, we will see many thread between class A/B vs class H topology. As with any design, there is a trade off. Class H are very efficient in exchange with higher distortion. I'm interested to see XPA-2 vs XPR-2 in term of refinement in sound quality.

[RadTech]

As I've said time and time again I love my RPA 2! ;D The XPRs have got me interested but so have the Red Dragons. If I had the money that MPS 2 recently in the Emporium would have been mine. ;D ;D ;D

[jamrock]

Mar 22, 2012 20:47:12 GMT -5 Golden Ear said:

When these amps get release, we will see many thread between class A/B vs class H topology. As with any design, there is a trade off. Class H are very efficient in exchange with higher distortion. I'm interested to see XPA-2 vs XPR-2 in term of refinement in sound quality.

Class-H amplifiers take the idea of class G one step further creating an infinitely variable supply rail. This is done by modulating the supply rails so that the rails are only a few volts larger than the output signal at any given time. The output stage operates at its maximum efficiency all the time. Switched-mode power supplies can be used to create the tracking rails. Significant efficiency gains can be achieved but with the drawback of more complicated supply design and reduced THD performance. In common designs, a voltage drop of about 10V is maintained over the output transistors in Class H circuits

[ausman]

hmmm make you wonder what amps people will go with..

them some purdy lights...

[briank]

Mar 22, 2012 20:11:58 GMT -5 @chuckienut said:

Mar 22, 2012 11:21:13 GMT -5 briank said:

Specs! Specs! Specs please !

Here is my very off the top of my flat head guess:



Power Output

353 watts/channel RMS; continuous; into 8 ohms; 20 Hz - 20 kHz;
<0.05% THD; any 2 channels driven (FTC)

At <1% THD at 1 kHz:
432 watts/channel RMS; ALL channels driven; into 8 ohms
505 watts/channel RMS; 3 channels driven; into 8 ohms
607.5 watts/channel RMS; 1 channel driven; into 8 ohms
648.5 watts/channel RMS; ALL channels driven; into 4 ohms
858 watts/channel RMS; 3 channels driven; into 4 ohms
1206.75 watts/channel RMS; 1 channel driven; into 4 ohms



S/N ratio:
> 104.7 dB (A-weighted)



Frequency response:
20 Hz to 20 kHz + / - 0.076 dB at 1 watt (- 1.9 dB at 80 kHz)

Thanks for posting this Chuckie, I can't wait to see the Audio Precision Test Data.