thoughts... pg 3

[speedmelter]

hey guys,

I am exploring my options of amplifier choices to run my component set as stated. I have the 4 ohm version and im going to run them passive. The manual suggests 125 watts rms per side. Im looking for a sq oriented amplifier. Want to purchase the amp locally as well. Suggestions are welcomed, thanks in advance.

[nervewrecker]

Have a lot to choose from.

Most 300 watt amps will do 150 a side bridged so you have a variety and all under $2k.

Orion Cobalt 600.4 & Alpine mrp f300 are two that have been used in competition with very good results.

[Aimar]

JL Audio XD 400/4v2

[blaine]

I have the same set. Gonna be using an Alpine PDX F6 (150 x 4), running active though.

[speedmelter]

would 150 watts on the tweets destroy them? i was thinking of going active as well.

btw thanks nerve.

[nervewrecker]

150 watts might smoke em and probably buss your ear drum.

Mine probably get about 20 watts if so much and they do fine.

[blaine]

Right now the getting bout 75 each from a Q450.4

http://www.sonicelectronix.com/item_222 ... -XS28.html
Features & Specs

• 1" XS Series Silk Dome Tweeter
• Power Handling:
o Peak: 400 watts per pair / 200 watts each
o RMS: 200 watts per pair / 100 watts each
• Multi-layer Rohacell/Nomex composite cone woofer
• Nitrile-butadiene rubber surround with parabolic surround roll
• Fiberglass composite basket
• Crossover design uses selectable crossover alignments to optimize the tweeter response
• Surface and coaxial mounting options
• Neodymium magnet structure
• 4 ohms impedance
• 1" High-temperature voice coil
• Top-mount depth: 7/8"

[nervewrecker]

I should mention its not ID tweets im using

Once crossed right im sure the ID tweets take some decent power though.

[speedmelter]

hmm maybe i should trash those passives and go active as well. darn, shouldve gotten the two ohm set.

[nervewrecker]

Stick with the passives and all they have to offer.

Most of who go active looking to cross outside of the range the passives have or experiment with it for staging, imaging etc etc.

If clean and loud is your objective, stick with the passives. I think Aaron uses passives in competition.

[speedmelter]

k im new to this so i guess keeping it simple is my best bet. been doing some reading up and i found a statement by someone on diyma which wasnt opposed stating that if a passive is provided with X amount of power, it distributes it to the components as X plus X each. seems magical but im still reading it up :/

edit: that highlighted statement turns out to be rubbish

[nervewrecker]

They usually have resistors on the tweeter part to decrease the power to it.

[speedmelter]

ok i read further and it seems that the passive distributes the power variably between tweet and midbass depending on the signal at the point in time. So now it seems that besides providing the cut off freq for the comps, it provides some regulation of power to the comps. did not know this before.

So i have decided that a clean 4 channel amp about 180 to 200 ish rms per side bridged at 4 ohms should do the trick.

excuse me while i go explore. been getting more pm's of persons trying to sell their stuff than responses but say what.

[kavaninho]

^^ Yes, you now researched something that is the closest to correct there. Although, there are many reputable foreign forums people still posts Tartar.

And BTW I run approximately 150Wrms on my tweets comfortably.

[shake d livin wake d dead]

I used an arc audio xdi series amp on a pair of ID components and coaxial.It was perfect.

[speedmelter]

so far the two options i like the most are;

us amps AX-TU4360C

its new old stock, and the input stage is driven by tubes,

specs;

180 rms per bridged pair at 4 ohms. 4 ch amp.
0.05% thd at 4 ohms,
S/N > 95db,
damping factor >200

does it seem to be suitable power?

my other like,

alpine pdx-f6

4 channel amplifier,

what i like about this amp is the flexibility it allows me. seeing that it gives the same power at 2 and 4 ohm loads, i can possibly go active later on. or even add rear fill if i decide to add more sound.

its amazing that its class D and the thd at that power is 0.003% rated fusing at 60 amps and all.

the s/n is almost the same as the US amp.

and if i buy it online it would cost me the same as the price im getting the us amp for.

i have one concern, would 300Wrms from the pdx to each side of the passive burn out or damage my comps?

and does anyone have experience with the ax-tu4360?

[OffshoreMarketing]

i wud run down that us amps if u can really get a good one

[SR]

sq oriented you wont need anything more than about 50-100 watts

[nervewrecker]

300 watts is a lot of power, you will need a lot of door reinforcement. Even at 50 watts you need some because 50 watts packs quite a punch and you need ten times the power to get twice as loud. Im not saying you wont hear a difference between 50 and 150 watts, you will notice a difference in the punch it delivers but consider the work and the expenses to go from 50 to 150.

But since you gauging alpine f6 and the likes, lets add this to the mix:

http://www.sonicelectronix.com/item_294 ... A1004.html

[speedmelter]

hmm it doesnt look to be as good as f6 alpine, but alot cheaper.

im thinking that i could always get an alpine pdx f6 in the future but the chance to get the us amp wont come again... decision decision....

[blaine]

Just received this....

[speedmelter]

sweetness...

[gfbl]

most reviews suggest that the jbl ms amps and kenwood xr are excellent value for money.you sound like you already have the itch to upgrade, if you can afford the alpine f-6 get it. also theres a mmats sq4160 4 channel available in the classifieds

[speedmelter]

ill go with the alpine f-6. had a very long think about it and although the us amp is rare, i dont think its a good idea to put out that much for a piece of equipment that was manufactured so long ago and has been just sitting there or who knows what.

[speedmelter]

time for a bump.

so i made up my mind on my amplifiers for my system.

ive purchased the pdx f6 4channel and the pdx m6 monoblock for my bass. They should be here by next month.

the two subs within my budget that ive seen and like are:

image dynamics idq 10

JBL W10GTi-MkII

from my research, the idq seems to be the best bang for the buck wrt S.Q reproduction but i am considering my options. I loveeeee the back of that JBL. Came over it by accident and now i am thinking.

Anyone in here has experience with it? how does it stack up against the idq?

[speedmelter]

[nervewrecker]

Your eyes even straying back to that IDQ after seeing the JBL backside?

My pick is the JBL

[speedmelter]

i need to come out to shows and hear these things play. does it sell here or do i have to bring it myself?

[nervewrecker]

Not sure where sells it but I know of the most recent two to pass through the forums. Only know where one is and ts not for sale.

[speedmelter]

k ill do some more research on it and bring it by sea.