kevmurray

yep, now stop dodging, what do I win? Seriously, I got the gist of your post and I was glad to see some evidence creeping into the discussion.

JordyO

iTrader: (17)

A firm hand shake?



How about this... you're in Ottawa... if we ever have a meet I'll buy you a beer

AAAAAAA

iTrader: (7)

Reading that, it sounds like the usual "marketeering" article that I would expect to find on a compagnys web site, usually one that offers amps with stupid high DP factors.

I don't find any meet to that article. Also if one reads deeper in the subject, one finds that a DP needs to be under 25 for an audible difference.

Point is, unless you have very long runs of wire, as in concerts, DP is is a useless spec.

veeman

iTrader: (3)

^^that's what i've gathered over the years as well. All of it is subjective until you can prove it in a double blind....that's the only evidence that's scientific.

thumpper

iTrader: (1)

remember that a true effective high damping factor is only possible with
the aid of servo's....
comparing 50 different amps not aided with servo's may not show any audible difference
in tightness (for example class D)
but throw a real servo amp in the mix and it's no comparison at all

it's just amazing having an amp that can controll a woofer right down to 10hz
as well as it can controll at 50hz

kevmurray

Sounds good Jordy (^^Must be your hand on the left?^^)

AAAAAAA

iTrader: (7)

hehe yeah thanks I will remember that.... how about you "remind me" why I need to have DP higher then what my ears can detect changes in?

And I won't argue marketerring terms with you hehe...servo.

Finally I can't say there is much content in what I listen to between 10 and 50hz... certainly not anything that helps "punch" as that is defined in higher frequencie range.

AAAAAAA

iTrader: (7)

How about you explain why it isn't? Besides the obvious factor of the gain **** usually being in a very inconvinent area hehehe.

They are suppose to serve different purpouses, but both control how loud it gets and both can lead to clipping.

thumpper

iTrader: (1)

there is alot of music with drops that go below 20hz if your amplifier
has any ***** down that low...
just for example the song "Loving Every Minute Of It" from Lover Boy
with the Crown amp the bass guitar strings drop low and hard enough
to actually SHIFT the whole van almost like it's being thrown forward
and that is with only a rated 3200w rms (crown power)




have you ever felt a true 10hz at 143db ???..
it knocks crap off of neighbours shelves from across the street
I'd love to build a 150db @ 10hz system...might do so next year
and I bet I can do it with only 3200w rms and some 15" Icons
for example four 10" SSA Icon woofers on a Crown A3000gti (3200w rms)






it's almost like this younger generation forgot what a real sub woofer set up
is all about....the term "SUB" in the phrase subwoofer means BELOW...
(below the frequencies that a normal woofer can produce)
any woofer can pick up notes 50hz and up..no big deal really..
any bookshelf system can do that easily.
it's those well thought out set ups that drop while taking your insides
down to the floor and keep dropping after the sound dissipates and
wobbles everything are the ones that deserve to be called sub woofers

most amps with a low damping loose control down that low and requier a
sub sonic filter (think about it...a "sub" woofer with a "sub" sonic filter...LOL)

if I was a SPL competitor and used fart boxes I probably wouldn't
give a crap about the woofer control of an amp......but I really like
surfing those sub sonics...they make me feel funny like when I climbed the
rope in gym class

a true damping does make a difference but you pay for it....
the power is way more $$$ per watt and the amp is usually
a power pig and a half

anyways.....
I'll give free system demo's for the guys and mustache rides for the ladies..not a problem

jstoner22

iTrader: (1)

A 4volt Headunit doesn't put out 4volts all the time. at half volume it may only be 2 volts etc. amplifiers will always put out the same amount of power.


Gain is simply the SENSITIVITY of the amplifier.

so its not controlling how loud it gets. its controlling when it gets that loud. do you want it to be max volume at 30% of your headunits preout voltage, or max volume at 80%.

Gain/Sensitivity is simply a tool that will allow you to match and optimize your power so you are attaining maximum clean power at the same time your source unit is.

..almost like user controlled efficiency lol

for example, i just got rid of a 8Volt preout eclipse deck. volume ranged between 0 and 80. which strong preouts such as these, if i have my sensitivity set too high on my amp, i will induce clipping at a low volume on the headunit. So i would be maxing out clean power at 30 on a scale of 80. Set properly I would be maxing out my clean power 64. In doing so I will have a lot more flexibility and control over my system.

for a deck with 4 volt preouts, I will obviously have to increase the sensitivity of my amplifier to once again be maxing out clean power of my amp at the same time my deck is maxing out clean power.


maybe i've got it all mixed up, but thats what i though:P