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post #271 of 357 Old 07-24-2006, 08:45 PM - Thread Starter
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TI PurePath is based on Equibit technology (i.e thats what they are calling it now i think)

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post #272 of 357 Old 07-25-2006, 09:32 AM
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I think any receiver that has digital input can serve your need. It doesn't have to be PWM/class D/digital amp. Class A/B (analog) Amp converts digital signal to analog before amplifies it. Class D (digital/PWM) amp amplifies digital signal without conversion. Anyone can correct me.

I don't have much money to own very expensive euipments like your guys and have no golden ears to tell which one is better.

I am thinking of buying Pana XR57.
How does this compare to HK DPR 2005, and the other PWM amps?

Biology is very different from EE in coursework structure. In EE, we don't do much of blind test bcoz it still have bias from the people who take the test. We try to do tests without human bias as much as possible. I have BS in EE, MS in Eng Mgt, PhD in IE, and used to lecture some EE class, so I know something about EE.


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Originally Posted by gevorg View Post

Thanks for the explaination.

So if both the XR55/57 and VRS-7100 have TAS5076 for processor and TAS5182 for controller, they have the same sound quality?

My only purpose for the receiver is to take digital signal and play music on a pair of speakers.

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post #273 of 357 Old 08-08-2006, 11:08 PM
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A new relatively inexpensive ICEpower based mono amp:
http://www.audiocircle.com/circles/i...?topic=30208.0

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post #274 of 357 Old 08-09-2006, 08:01 PM
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Hello All:

I think I've read this thread quite thoroughly, but I didn't actually notice a digital amp with a digital (SPDIF) input. Is there such a beast?

I know there are receivers (eg Panasonic) which will be my fall-back position but that does seem overkill when all I need is a power amp (actually several) with digital in and analog out.

It looked like the Flying Mole multichannel jobbie might be the answer, but again it's analog in.

Thanks.

Best regards,

Frederick.
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post #275 of 357 Old 08-09-2006, 08:54 PM - Thread Starter
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Quote:
Originally Posted by cschang View Post

A new relatively inexpensive ICEpower based mono amp:
http://www.audiocircle.com/circles/i...?topic=30208.0


cheers. Red Dragon's already listed on the front page

holy.. thats cheap. wow. great stuff

(Like the thread complaining about the power cord *ROFLOL*)

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post #276 of 357 Old 08-10-2006, 08:54 AM
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Quote:
Originally Posted by FPPeterson View Post

Hello All:

I think I've read this thread quite thoroughly, but I didn't actually notice a digital amp with a digital (SPDIF) input. Is there such a beast?

I know there are receivers (eg Panasonic) which will be my fall-back position but that does seem overkill when all I need is a power amp (actually several) with digital in and analog out.

It looked like the Flying Mole multichannel jobbie might be the answer, but again it's analog in.

Thanks.

Tact audio has all digital amps.
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post #277 of 357 Old 08-10-2006, 08:56 AM
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Quote:
Originally Posted by FPPeterson View Post

I think I've read this thread quite thoroughly, but I didn't actually notice a digital amp with a digital (SPDIF) input. Is there such a beast?

I know there are receivers (eg Panasonic) which will be my fall-back position but that does seem overkill when all I need is a power amp (actually several) with digital in and analog out.


Take a look at the PCM->PWM amps like anything using TI's Equibit technology, like the amps from TacT Audio . Otherwise, I think you will need to find an amp with a DAC (kind of like your receiver). You might also be interested in the new products from Amplio Audio. It looks like they are including the soundcard/DACs with their amplifier. Of course you wouldn't need a S/PDIF cable, instead you would connect directly to your PC with FireWire, just like many external soundcards.
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post #278 of 357 Old 08-24-2006, 09:44 AM
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Quote:
Originally Posted by FPPeterson View Post

I think I've read this thread quite thoroughly, but I didn't actually notice a digital amp with a digital (SPDIF) input. Is there such a beast?

Yes, have a look at TacT Boz: http://www.bozaudio.com

The "problem" with a digital input is that you'll need volume control (unless you want to do the volume control in the digital domain, which might not be ideal).

The TacT amps use an RS-232 link for syncronizing the volume between the preamplifier and the power amplifier.

BTW, the Tact amps use a very interesting technique of volume control. The digital input is always at full level, and the volume is controlled by controlling the voltage of the amp's power supply...

Peter
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post #279 of 357 Old 08-24-2006, 09:54 AM
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Quote:
Originally Posted by cschang View Post

Sure thing Adam.

Would love to compare a UcD400 and 1000asp based amps.

Curtis et al,

Kevin at DIYCable.com has released his astoundingly-priced Hypex-based Exodus kits, which he will also assemble for a fee. I'm ordering a 5-channel UcD400-based kit today, and I will keep everyone posted. My first impressions are of clean and overbuilt parts, great instructions and layout, and shiny case.



This qualifies as an exciting addition to the Class D amplifer list, so thought I'd add it here.

This amp will be mated to my Ascend 5-channel setup.
I will keep all interested apprised of my kit build progress, likely in another thread.

Interesting mini-review here with this author stating that the amp supersedes his existing Odyssey Stratos, which I think is no small achievement.

Best,
Adam

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post #280 of 357 Old 08-24-2006, 10:48 AM
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Looking forward to it Adam! After you are done building, you are bringing the amp out to LA so we can compare...right?

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post #281 of 357 Old 08-24-2006, 11:03 AM - Thread Starter
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Quote:
Originally Posted by Ad-Rok View Post

This qualifies as an exciting addition to the Class D amplifer list, so thought I'd add it here.

thanks Adam, updated the main list on 1st page

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post #282 of 357 Old 08-24-2006, 11:22 AM
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You're still missing the new NHT ICE amps -

http://nhthifi.com/2006/products/s/power2.html
http://nhthifi.com/2006/products/s/power5.html

200Wx2 - $1200
200Wx5 - $2000

John
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post #283 of 357 Old 08-24-2006, 11:25 AM
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Quote:
Originally Posted by Alimentall View Post

You're still missing the new NHT ICE amps -

http://nhthifi.com/2006/products/s/power2.html
http://nhthifi.com/2006/products/s/power5.html

200Wx2 - $1200
200Wx5 - $2000

John, can you find out from NHT which module they are using?

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post #284 of 357 Old 08-24-2006, 11:28 AM
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I did. It's marked on the board itself. The one I posted in the other thread. It was something like xxx500A. It is the current generation of the 200W module without the power supply (they build their own).

John
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post #285 of 357 Old 08-24-2006, 11:37 AM
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Thanks John...great stuff...great pricing.

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post #286 of 357 Old 08-24-2006, 11:50 AM - Thread Starter
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Quote:
Originally Posted by Alimentall View Post

You're still missing the new NHT ICE amps -

added! thanks

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post #287 of 357 Old 08-24-2006, 11:58 AM
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Quote:
Originally Posted by cschang View Post

Thanks John...great stuff...great pricing.

Coming from you, that makes me feel much better! I was a bit worried about the prices and I've never heard an ICE amp before, so you get those fears about what it might sound like. I still am waiting to get one for myself (the line is long still!), but from what I've read, I'm feeling better about it. Of course, the Xd system is running digital amps and I have little to complain about there. I'm all for amplifiers that are cooler and more reliable, especially for receivers and custom install product! I suspect there will be quite a bit of additions to be made to these page in less than a month from CEDIA members.

John
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post #288 of 357 Old 09-08-2006, 11:57 AM
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In a post over on diyAudio, they mentioned a new Class-D chip manufacturer named Freescale who might be collaborating with Apple on future amplifier products.

Has anyone else heard anything about this...?

I'm curious.

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post #289 of 357 Old 09-09-2006, 12:38 AM
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Quote:
Originally Posted by greggplummer View Post

In a post over on diyAudio, they mentioned a new Class-D chip manufacturer named Freescale who might be collaborating with Apple on future amplifier products.

Freescale used to be Motorola, right?

A one-stop Jonathan Ive designed box with solid room correction, OSX, and efficient (preferably configurable, to allow multiamped systems with active crossovers) amplifiers is nothing less than the end of the entire rest of the audio industry. Let's hope it actually happens.

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post #290 of 357 Old 09-09-2006, 08:58 AM
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Quote:
Originally Posted by DS-21 View Post

Freescale used to be Motorola, right?

A one-stop Jonathan Ive designed box with solid room correction, OSX, and efficient (preferably configurable, to allow multiamped systems with active crossovers) amplifiers is nothing less than the end of the entire rest of the audio industry. Let's hope it actually happens.

Yes, Freescale is a Motorola spinoff.

As far as the end of the rest of the audio industry... I hope not. We're just trying to get started.

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post #291 of 357 Old 09-13-2006, 08:24 AM - Thread Starter
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In HiFi Choice (Oct 2006 issue with the free Naim disc) there's an interview with the NAD Managing Director who says they are working on "an amazing Masters Series digital amplifier with very new cutting edge digital technology"

Anyone heard anything else on the grapevine?

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post #292 of 357 Old 09-13-2006, 08:34 AM
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Only whispers. Since they have very high-end conventional amps in the M3 and M25 amplifier (and rumors of more additions in this area), I would make a bet that the digital amps would show up in, perhaps, a 7.1 Masters Series receiver. Digital amplification would be critical because you couldn't get the kind of power that one would expect from a Masters series component in a receiver without going digital. I'm speculating mostly, but I think that's what is likely to happen.

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post #293 of 357 Old 09-13-2006, 11:55 AM
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They will probably leverage what they can out of their ICEpower agreement.

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post #294 of 357 Old 09-13-2006, 12:04 PM
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Quote:
Originally Posted by cschang View Post

They will probably leverage what they can out of their ICEpower agreement.

That would NHT doing ICE, but that could very easily happen as well. NAD is dealing with TI on surround processing so they might be doing a tri-path thing

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post #295 of 357 Old 09-13-2006, 12:50 PM
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Sorry...I got mixed up between NHT and NAD.

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post #296 of 357 Old 09-13-2006, 01:12 PM - Thread Starter
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Quote:
Originally Posted by Alimentall View Post

That would NHT doing ICE, but that could very easily happen as well. NAD is dealing with TI on surround processing so they might be doing a tri-path thing

TI isn't Tripath though - TI does Purepath (=Equibit, in Panasonic receivers), Tripath is Class-T (which Naim uses in their n-Vi DVD receiver)

but I imagine TI supply their Aureus DSP to a lot of other companies so it doesn't necessarily mean anything on the digital amp front. IF it did... a digital input into a NAD amp powered by Equibit could be awesome

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post #297 of 357 Old 09-13-2006, 01:19 PM
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Quote:
Originally Posted by SiriuslyCold View Post

TI isn't Tripath though - TI does Purepath (=Equibit, in Panasonic receivers), Tripath is Class-T (which Naim uses in their n-Vi DVD receiver)

Doh!!! I just pulled a Curtis

But seriously, I have no idea what NAD is using, it could be totally proprietary. I just heard bits and pieces. I'll probably be able to find out at the CEDIA show on Saturday.

John
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post #298 of 357 Old 09-13-2006, 01:22 PM - Thread Starter
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LOL!

it'd be cool if you could report back from CEDIA, maybe other new class-D amps are also in development.

Boo!
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post #299 of 357 Old 09-13-2006, 02:04 PM
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Quote:
Originally Posted by Alimentall View Post

That would NHT doing ICE, but that could very easily happen as well. NAD is dealing with TI on surround processing so they might be doing a tri-path thing

I thought NHT was using PowerPhysics. At least that's what they use in their XdA (which is part of their Xd system).

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post #300 of 357 Old 09-13-2006, 02:06 PM
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Quote:
Originally Posted by greggplummer View Post

I thought NHT was using PowerPhysics. At least that's what they use in their XdA (which is part of their Xd system).

Yeah...but in their new standalone power amp they are using ICEpower.

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