Class T or Class D amp?

[mike_patton]

Actually, most people would tell you that Class A/B amps sound better
than digitals. The only realy advantage to digital amps are that
they're a) cheaper and b) more efficient. I would only bother
switching amps if you're going to use more power.

Also, as far as I know, there is no difference worth mentioning between
Class D and Class T amps...


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[Grayson73]

So you're saying it's not an upgrade to go from my Zapco and PG to Class
T or Class D amps?


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[Grayson73]

I'd like to upgrade my Zapco Studio 300x and Phoenix Gold ZX450 and
was thinking about doing so with a digital amp.

Would Class D or Class T be better for my 12 inch Infinity Beta Sub,
which is currently being run by the Zapco amp? I was thinking about
purchasing the Blaupunkt PA2150 or PA2200 for that.

As for the interior speakers, how would the Blaupunkt PA4100 compare
to the Phoenix Gold ZX450?

Any other suggestions? I assume that digital amps will sound better
than the amps that I'm currently using.

Grayson

[Scott Gardner]

Grayson73 wrote:

>
> So you're saying it's not an upgrade to go from my Zapco and PG to Class
> T or Class D amps?
>
>

The only way it would be an "upgrade" would be if the new amps had more
power or more useful features than your current amps. They'll also put
less of a strain on your car's electrical system for a given amount of
delivered power. A digital-switching amplifier won't sound any better than
your current Class AB amps. Also, Zapco and Phoenix Gold amps have a long
history of reliability. Some of the new digital-switching amps are very
inexpensive, but I'd advise you to look at the construction before you buy
one. Several brands seem to be concerned about watts-per-dollar and not
much else.

Scott Gardner

[FHLH002]

go with a T.... it's higher than D so it's gotta be better.....
FHLH.......<- wonders why their are no Class F amps...

"Grayson73" > wrote in message
om...
> I'd like to upgrade my Zapco Studio 300x and Phoenix Gold ZX450 and
> was thinking about doing so with a digital amp.
>
> Would Class D or Class T be better for my 12 inch Infinity Beta Sub,
> which is currently being run by the Zapco amp? I was thinking about
> purchasing the Blaupunkt PA2150 or PA2200 for that.
>
> As for the interior speakers, how would the Blaupunkt PA4100 compare
> to the Phoenix Gold ZX450?
>
> Any other suggestions? I assume that digital amps will sound better
> than the amps that I'm currently using.
>
> Grayson

[MZ]

> Actually, most people would tell you that Class A/B amps sound better
> than digitals.

Right, but most KNOWLEDGABLE people will tell you that there's no audible
difference.

[Chad Wahls]

"FHLH002" > wrote in message
...
> go with a T.... it's higher than D so it's gotta be better.....
> FHLH.......<- wonders why their are no Class F amps...
>
There are..... They are used in microwave transmission and are capible of a
huge bandwidth.....

http://www.apl.jhu.edu/Notes/Penn/projects/mmic_PA_cg.pdf

Chad

[mike_patton]

Grayson73 Wrote:
> So you're saying it's not an upgrade to go from my Zapco and PG to Class
> T or Class D amps?

I'm saying that if you're not buying more power, it would not be worth
switching, in my opinion.


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[mike_patton]

John Durbin Wrote:
> You mean, other than class T (Tripath) amps being full-range (20-20K
> bandwidth) vs. the typical 20-200Hz bandwidth of a class D sub amp?
>
> JD
>
>
> >
> >
> >
> >[/color]

Yes, other than that, which doesn't apply if you're going to use both
amps for your subs.


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[Kevin McMurtrie]

In article >,
"MZ" > wrote:

> > Actually, most people would tell you that Class A/B amps sound better
> > than digitals.
>
> Right, but most KNOWLEDGABLE people will tell you that there's no audible
> difference.

Class AB and D are comparable only when considering subwoofer
frequencies. If you're talking about full spectrum, then the price of
Class D rises very steeply to achieve even moderately good quality.

Class D circuits introduce a time delay that makes high frequency
negative feedback difficult, or even impossible. The inductive or
capacitive load of a tweeter becomes a real problem.

[John Durbin]

You mean, other than class T (Tripath) amps being full-range (20-20K
bandwidth) vs. the typical 20-200Hz bandwidth of a class D sub amp?

JD

mike_patton wrote:

>Actually, most people would tell you that Class A/B amps sound better
>than digitals. The only realy advantage to digital amps are that
>they're a) cheaper and b) more efficient. I would only bother
>switching amps if you're going to use more power.
>
>Also, as far as I know, there is no difference worth mentioning between
>Class D and Class T amps...
>
>
>
>

[John Durbin]

there are... also G, H, etc.

But T isn't a class, it's a marketing designation contributed by
Tripath, the folks that make the chips used in "class T" amps.

JD

FHLH002 wrote:

>go with a T.... it's higher than D so it's gotta be better.....
>FHLH.......<- wonders why their are no Class F amps...
>
>"Grayson73" > wrote in message
om...
>
>
>>I'd like to upgrade my Zapco Studio 300x and Phoenix Gold ZX450 and
>>was thinking about doing so with a digital amp.
>>
>>Would Class D or Class T be better for my 12 inch Infinity Beta Sub,
>>which is currently being run by the Zapco amp? I was thinking about
>>purchasing the Blaupunkt PA2150 or PA2200 for that.
>>
>>As for the interior speakers, how would the Blaupunkt PA4100 compare
>>to the Phoenix Gold ZX450?
>>
>>Any other suggestions? I assume that digital amps will sound better
>>than the amps that I'm currently using.
>>
>>Grayson
>>
>>
>
>
>
>

[MZ]

> Class AB and D are comparable only when considering subwoofer
> frequencies. If you're talking about full spectrum, then the price of
> Class D rises very steeply to achieve even moderately good quality.
>
> Class D circuits introduce a time delay that makes high frequency
> negative feedback difficult, or even impossible. The inductive or
> capacitive load of a tweeter becomes a real problem.

No one's talking about using a class D amp that's designed for subwoofer use
to play the entire spectrum. That would be akin to talking about using an
amp, that is designed to be run at 4 ohms bridged, to run a half ohm load
instead. It's called misuse.

[Chad Wahls]

"Kevin McMurtrie" > wrote in message
...


> Class D circuits introduce a time delay that makes high frequency
> negative feedback difficult, or even impossible. The inductive or
> capacitive load of a tweeter becomes a real problem.

Well.... Inductive or capacitive? Tweeters are quite easy to drive actually
and woofers are way inductive, and harder to drive, especially with all the
back EMF of the long strokers.

PWM class amplifiers are easier and cheaper to design for low frequency
usage because the switching freq can be lowered and the FETs don't have to
be as fast, the designer can also get by on sloppier tolerances for the
filter network on the output side of the amplifier. There are mant full
rance PWM amps out there and they sound fantastic, you just have to pay
more. In car audio land it is the ideal amp for subs because they are very
efficient and relatively cheap component wise.

Chad

[FHLH002]

ahhhh.... marketing... shoulda known.

FHLH......

"John Durbin" > wrote in message
...
> there are... also G, H, etc.
>
> But T isn't a class, it's a marketing designation contributed by
> Tripath, the folks that make the chips used in "class T" amps.
>
> JD
>
> FHLH002 wrote:
>
> >go with a T.... it's higher than D so it's gotta be better.....
> >FHLH.......<- wonders why their are no Class F amps...
> >
> >"Grayson73" > wrote in message
> om...
> >
> >
> >>I'd like to upgrade my Zapco Studio 300x and Phoenix Gold ZX450 and
> >>was thinking about doing so with a digital amp.
> >>
> >>Would Class D or Class T be better for my 12 inch Infinity Beta Sub,
> >>which is currently being run by the Zapco amp? I was thinking about
> >>purchasing the Blaupunkt PA2150 or PA2200 for that.
> >>
> >>As for the interior speakers, how would the Blaupunkt PA4100 compare
> >>to the Phoenix Gold ZX450?
> >>
> >>Any other suggestions? I assume that digital amps will sound better
> >>than the amps that I'm currently using.
> >>
> >>Grayson
> >>
> >>
> >
> >
> >
> >
>

[John Durbin]

correct, both now and for the rest of the time you own it... otherwise,
clearly the full-range 2 channel design could be much more versatile.

JD

mike_patton wrote:

>John Durbin Wrote:
>
>
>>You mean, other than class T (Tripath) amps being full-range (20-20K
>>bandwidth) vs. the typical 20-200Hz bandwidth of a class D sub amp?
>>
>>JD
>>
>>
>>
>>
>>>
>>>
>>>
>>>
>
>Yes, other than that, which doesn't apply if you're going to use both
>amps for your subs.
>
>
>
>[/color]