| Dunno, im curious about the whole new JBL amp lineup. I just purchased
| a px300.4 and ill let you know how it is. The specs for SN suck but i
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| Love those plex covers on those amps, just need to sneak in some led
| lights in there for a little amber glow to match the rsx's interior.
I'm actually looking at the px300.4 in addition to the bpx1100.1. It'll
give me 125w RMS x 4 at 4ohms - better than my current Alpine MRV-F540 -
I've got the alpine bridged (200w RMS x 2) to run my Focal 6.5" comps, but
that's just too much power for them - I have to be very careful with the
volume control.
The PX300.4 AND the BPX1100.1 both are "neon ready" - they'll each take 2
StreetGlow 9" AN9 series tubes - they even come with clips for the tubes and
everything.
Let me know how you like the amp - I'm doing a "re-install" and moving
everything from the seat-backs to built-up amp racks in the trunk of my Mach
1.
Gary
>> Anybody own one of these (JBL BPX1100.1)? Specs on this are phenomenal, and
>> the form factor is exactly what I'm looking for (JL 1000/1 is too long, as
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>think that is going to be the case with a lot of amps when everyone
>goes to the new rating standards that JBL is already using.
The S/N ratio for the new JBL PX300.4 is about 76 dBa. Like you said,
that's under the new CEA-2006 standard of measuring S/N. Under the
old method, it would have been closer to 102 dBa.
But the important thing is that even 76 dBa under the OLD system would
have been plenty high enough. At only 76 dBa, which you say "sucks",
the signal is still more than 46,000,000 times stronger than the
noise. You'd never hear the noise anyway.
For the most part, I like the new CEA standard, but it doesn't change
the fact that the marketing types will abuse it. With current amps,
the salesdroids try to convince you that a S/N ratio of 102 dB is
"better" than a S/N ratio of 90 dB. With the new CEA 2006 standard,
they'll continue to do the same thing, but the numbers will be lower.
They'll still try to upsell you from amp X to amp Y because amp Y has
a 76 dB S/N ratio compared to amp X's 73 dB ratio.
Also, since Joe Average consumer will never know the difference
between the two measuring standards, the salesbot will be free to tell
THIS lie all day-- "Under the OLD standard, this amp's signal to noise
ratio would have been 105 dB!" (or 110, or 112, or whatever he wants
to claim.) People won't know how to convert the "new" numbers into
the "old" numbers that they're used to, so the salesbot will be happy
to do it for them, making the amp sound as good as he wants to in the
process.
Likewise with damping factor. I'm still looking into exactly how the
new numbers are derived, but it looks like they've reduced the scale
so that all amps will now have an "effective damping factor" of
significantly less than 10.
These new measuring standards are nice, but it doesn't change the fact
that the damping factor and S/N ratio for ANY modern solid-state amp
are already so high that the manufacturers don't need to list them at
all, much less worry about a new standard so they can list them
differently.
Scott Gardner
mark v. - 01 Jun 2004 20:18 GMT
> >> Anybody own one of these (JBL BPX1100.1)? Specs on this are phenomenal, and
> >> the form factor is exactly what I'm looking for (JL 1000/1 is too long, as
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>
> Scott Gardner
Yea, well. I used to listen to nice tape decks that had s/n's in the
70's and i could hear the noise when the amp was cranked and you ran
into a quiet passage in the music. But you are right 76db is pretty
high.
I like the plex, you know why? The bling factor is only secondary. If
a company is OK with putting its internals of the amp on parade for
everyone to see I think a company is pretty comfy with its product.
The construction quality of the jbl amp looks better than my 98 series
punch amps. The power these puppies put out should be more than enough
for my modest needs.
Now i just have to find a 10 inch or 8 inch sub that likes ported
boxes 1 foot or smaller and takes about 300 watts to get the
respective sub to its xmax.
Oh and it has to sound good too. And fit in my budget :-)
mark v. - 06 Jun 2004 04:26 GMT
If I need more than four channels in the future , and i should know
within the first two months of having my system installed , I want to
get the px600.2 . That thing runs 600 watts mono and should push any
10 incher i want, hopefully even the gti 10" . Of couse then I would
have to spend those extra watts somewhere, probably on some nice
midbasses up front. Is there any real reason to get the mono amps like
the 500.1 over a 600.2 ? I know the 500.1 is a " crown " design or
something but really what does that get me?