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List of Digital (Class-D) Home Theater Receivers - Page 62

post #1831 of 1899
Just had one of my two pro modified saxr 45's I had been using in a 6.1 dual biamped set up have its power supply start clicking. Although I am sure it could be repaired , in the meantime I ordered a Pioneer Elite sx 35 to try out its Ice Amps.

I only paid 750.00 which is what I had into each of the Panisonics after mods , so looking forward to hearing the SC 35 that apparently delivers its full 140 watts with all channels driven , as well as having hdmi ect.

Not sure if bi amping is possible with the sc 35 but if it is , I will be bi amping the fronts. Should have it next week and looking forward to it.
post #1832 of 1899
Quote:
Originally Posted by Earz View Post

Just had one of my two pro modified saxr 45's I had been using in a 6.1 dual biamped set up have its power supply start clicking. Although I am sure it could be repaired , in the meantime I ordered a Pioneer Elite sx 35 to try out its Ice Amps.

I only paid 750.00 which is what I had into each of the Panisonics after mods , so looking forward to hearing the SC 35 that apparently delivers its full 140 watts with all channels driven , as well as having hdmi ect.

Not sure if bi amping is possible with the sc 35 but if it is , I will be bi amping the fronts. Should have it next week and looking forward to it.

How did you like the Pioneer Elite sx 35 compared to the panasonic 45?
post #1833 of 1899
Quote:
Originally Posted by IronForge View Post

How did you like the Pioneer Elite sx 35 compared to the panasonic 45?

I like it better than the numerous other so called digital receivers as well as any Denon , B&k , H/K , or Onkyo I have owned but I don't believe the SC 35 or any other Pioneer to be truly digital to the binding posts like the SA-XR 45 is. You will not hear the detail to the extreme you do with a Panny...especially modded Pannys.
I also believe the bass is a bit faster on the Panny but still quite fast on the Pioneer.

Of course the HDMI inputs , HD Audio , numerous x over points , on board set up ect are much appreciated , and the sc 35 does a great job at HT.

If I had to compare the SC 35 to a previous receiver for audio it would be a Harmon Kardon DPR 2005 with a veil lifted off the speakers along with more power.

I have yet to do a fair comparison of the 2 channel audio playback until I get around to setting up the SC 35 in what ever pure mode it happens to have.
post #1834 of 1899
So, let me get that straight: there were 2 class D models manufactured during 10 year period (Panasonic and Sherwood). Would the assumption that most of HTIB are class D?
post #1835 of 1899
I am willing to bet that HTiBs have small amplifiers considering the speakers they are designed to drive.
post #1836 of 1899
Bang and Olufsen - Beosound 8
post #1837 of 1899
That's not a receiver.
post #1838 of 1899
I have an older Sony ES receiver.

A feature I most enjoy is the ability to adjust Master vol, Center vol, and Surround vol independently from the remote without the use of menus.

Anyone know of a current receiver that has this ability?
post #1839 of 1899
If you are talking class D receivers, the R-904N does allow you to change the volume of each channel using the remote very easily.
post #1840 of 1899
onkyo? wtheck is a digital avr receiver... is it like a network receiver with the ability to browse internet? like a built in router, wifi?
post #1841 of 1899
Most network avr receivers work from either a network (ethernet) or wi fi input and thus don't have internal modem or router capability. They work from your existing internet access modem/router.

I love my Marantz NR1602 and SR7005 receivers for their ability to connect to Pandora, Rhasophy, 14,000 internet radio stations, i-pod/mp3 players, access to your computer audio files, etc. Complete access to more audio sources than you ever conceived of and accessible via a remote control.
post #1842 of 1899
Quote:
Originally Posted by Jim Griffin View Post

... Marantz NR1602 and SR7005 receivers ...

Both are analog receivers and not digital receivers.
post #1843 of 1899
Class-D audio amplifier exhibits power density of 3.2-W/mm-square

Quote:


STMicroelectronics has introduced a high-performance, analog class-D audio amplifier that is claiming best-in-class power density. The achievement will allow equipment manufacturers to combine superior audio quality with a small form factor in next-generation home and professional sound systems and active-speaker applications.
....

The TDA7498E amplifier offers flexible audio-system configuration, in both stereo and mono modes, and also includes the mono parallel feature for driving the subwoofer/woofer channel in 2.1 sound set-ups. The device exhibits a signal-to-noise ratio of 100dB and provides four selectable, fixed-gain settings at 23.8 dB, 29.8 dB, 33.3 dB and 35.8 dB.

ST's TDA7498E dual-BTL (Bridge Tied Load) class-D audio amplifier with a single power supply is sampling now and volume production is scheduled for February 2012, with unit pricing at $6 for volumes in the range of 1,000 pieces.

This sounds very promising. And cheap.

Wish someone would bring a miniature box with Audyssey MultiEQ XT32....
post #1844 of 1899
Quote:
Originally Posted by Ryan1 View Post

Class-D audio amplifier exhibits power density of 3.2-W/mm-square
Quote:


... analog class-D audio amplifier ... ST's newest analog audio class-D amplifier ...

...

So it is an analog amplifier and not a digital amplifier.
https://secure.wikimedia.org/wikiped...er#Terminology
Quote:


The term "class D" is sometimes misunderstood as meaning a "digital" amplifier.
post #1845 of 1899
Quote:
Originally Posted by drSeehas View Post

So it is an analog amplifier and not a digital amplifier.
....

Not quite....

See this:

http://www.audioholics.com/education...ital-amplifier

Quote:


A digital amplifier will have either analog or digital inputs. Good digital amplifiers with analog inputs can use analog feedback networks to lower the amplifier's distortion, in much the same way that a Class A/B analog amplifier uses a negative feedback network to lessen the distortion. However, a digital amplifier that accepts only a digital input must rely on the incoming digital signal to lower distortion.
post #1846 of 1899
Quote:
Originally Posted by Ryan1 View Post

Not quite....

See this:

http://www.audioholics.com/education...ital-amplifier

???
This is about analog or digital inputs of digital amplifiers.
You quoted before something about an analog amplifier...

Today you don't have analog input signals anymore. Nearly all sources are digital. At least here in Europe.
post #1847 of 1899
Quote:
Originally Posted by drSeehas View Post

???
This is about analog or digital inputs of digital amplifiers.
You quoted before something about an analog amplifier...

Today you don't have analog input signals anymore. Nearly all sources are digital. At least here in Europe.

You seem a bit confused about what exactly a Class D amp is.

Take a closer look at the link I posted.
post #1848 of 1899
Quote:
Originally Posted by Ryan1 View Post

You seem a bit confused about what exactly a Class D amp is...

You seem a bit confused about what exactly the topic of this thread is.
It is about digital home theater receivers and not about Class D receivers.

As far as I understand there are analog and digital Class D receivers. A Class D receiver can be a digital receiver, but not every Class D receiver is a digital receiver.
It all depends on the definition of a digital receiver.
post #1849 of 1899
Really, this thread is mislabeled. It should be labeled "list of class-d receivers" because that is what the 1st post lists. Many of those are "analog" class-d amps.

There has been much debate over the benefit of analog vs digital input to class-d amps and the overall consensus seems to be that there is not much benefit to having a digital input to the amp. Many of the best class-d amps have analog inputs in fact (e.g. IDEPower, Hypex, Tripath, IR, etc.). Even TI, who marketed the "digital" class-d amp under the Equibit and Purepath names also makes analog class-d.

Please see:
http://en.wikipedia.org/wiki/Class-D...er#Terminology
post #1850 of 1899
As drawz notes, most of the equipment discussed in this thread is Class D with analog inputs.

It is common usage to refer to any switching amps (Class D) as "digital amps."

As an example of how "digital" is commonly used when referring to amps, here is more from Audioholics:

Quote:


Basically, a digital (Class D) amplifier takes an incoming analog signal and converts it into a digital representation comprised of pulse widths. Although there are a number of different design variations, Class D amplifiers are essentially switching amplifiers or Pulse Width Modulator (PWM) designs. The incoming analog audio signal is used to modulate a very high frequency Pulse-Width Modulated (PWM) carrier that works the output stage either fully on or off. Later on, this ultra-high-frequency carrier must be removed from the audio output with a reconstruction filter so that no ultra-high frequency switching components remain to corrupt the audio signals.

and

Quote:


A digital amplifier will have either analog or digital inputs. Good digital amplifiers with analog inputs can use analog feedback networks to lower the amplifier’s distortion, in much the same way that a Class A/B analog amplifier uses a negative feedback network to lessen the distortion. However, a digital amplifier that accepts only a digital input must rely on the incoming digital signal to lower distortion.

The distinguishing feature that matters of the what is commonly termed a"digital" amp design (Class D) is not the nature of the input stage, but its switching architecture which makes it so efficient.

And that's what this thread is about.


Back on topic, I really hope someone takes the TDA7498E and makes something small, cool and powerful out of it for home theater.
post #1851 of 1899
Why is the Panasonic SA-BX500 not listed?
http://www.avsforum.com/avs-vb/showthread.php?t=1079103
post #1852 of 1899
I'm a total novice here...
Need to upgrade my receiver!!! I have an old Kenwood receiver with no HDMI inputs~ Just upgraded tv to 59" plasma 3D, and a 3D blu-ray player, now I need a new receiver. Anyone got any suggestions on a good one?
Thanks
post #1853 of 1899
Thinking about a Onkyo TX - NR609 7.2 Channel Network THX Certified A/V Receiver. Any thoughts?
post #1854 of 1899
Really wish Pioneer would sell the S300 and S500 in the US!

xnappo
post #1855 of 1899
Quote:
Originally Posted by xnappo View Post

Really wish Pioneer would sell the S300 and S500 in the US!

xnappo

I suspect the Pioneers are the same basic hardware as the slim-line Marantz, with minor I/O differences and an inferior room correction system.

There's a lot of overlap in hardware between D&M Holdings and Pioneer right now. Both seem to go to the same OEM's for their mass-market products.
post #1856 of 1899
Quote:
Originally Posted by DS-21 View Post

I suspect the Pioneers are the same basic hardware as the slim-line Marantz, with minor I/O differences and an inferior room correction system. ...

Not really.

The Pioneers have Class D amps, while Marantz does not. Which is why the Pioneers are discussed in this topic, while the Marantz is not
post #1857 of 1899
Quote:
Originally Posted by Ryan1 View Post

Not really.

The Pioneers have Class D amps, while Marantz does not. Which is why the Pioneers are discussed in this topic, while the Marantz is not

Are you sure about that? Given the size and power, it's more likely than not.

Moreover, nothing in their propaganda says otherwise. Class D amps can still be "discrete."
post #1858 of 1899
Quote:
Originally Posted by DS-21 View Post

Are you sure about that? Given the size and power, it's more likely than not.

Moreover, nothing in their propaganda says otherwise. Class D amps can still be "discrete."

Positive.

xnappo
post #1859 of 1899
Quote:
Originally Posted by DS-21 View Post

Are you sure about that? Given the size and power, it's more likely than not.

Moreover, nothing in their propaganda says otherwise. Class D amps can still be "discrete."

Check this out, for example:

All-discrete, 50w x 5 Class AB Output Stage
post #1860 of 1899
Quote:
Originally Posted by Ryan1 View Post

Check this out, for example:

All-discrete, 50w x 5 Class AB Output Stage

If true, it brings up an interesting question about the Marantz:where are they lying?

Video processing and all that AB amp in a small chassis with scant opportunity for heat-sinking and no visible fans is highly unlikely. (I assume there is a flat-mounted fan somewhere inside the unit, but still.) The heat has to go somewhere. So are they lying about power, or being slippery about the amplification? Though I suppose, could have simply made a box that's designed to melt itself shortly after the warranty ends.
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