Topic: Passive / Active

[qcb7819]

I'm a newbie on this thing....

Setup is mixture of passive and active, and when I really listen (audit) the output, there is slight difference between them. Passive :- depends on the brand, active can be played around (H701).

Questions: Can they be combine together, what I mean is,  the drive setup is passive and the amp running it is active, (the result: hard time in getting the suitable output)

[craziechild]

from what i understand...

you are trying to run active but have the same SQ as running passive?

or i am totally wrong?

[qcb7819]

yes.... . Active due to H701; passive due to the component, when hooked up the active is thru the amp and the passive thru the driver, 

[Oldskolboyz]

H701 can be use either active or passive crossover coz 5.1 maa....

[kevyeoh]

the way i understand...it's a passive setup...

what he's trying to say is... use normal component set with the passive xover.... then when connect to amp...use the amp's xover as active... because can change the xover setting at the amp...

right?

[qcb7819]

Now this is becoming even more complicated.....
why...cos, there will be three xover applied, from the component, from the amp and from the H701.
Unless, the amp xover is turn to OFF, the driver gets the xover from the processor, will this be active.
The scenario is if all the xover is applied (turn on), will the system/output be like "putting cat and dog together"

[Zenn]

head unit - pxa701 - amp - passive - speakers.........correct??

this is normal, for ppl who dont have enough amplifier channels to run full active, maybe they just have a 4ch amp, so can run fronts & sub only.

so in this case, HU xover set to full range or off, depending on your menu.  pxa only use front & sub.  aiseh cant remember the pxa menu exactly but speaker select component and not sure use front 1 or 2, and of coz just have to set front highpass around 63hz, front lowpass = off, sub lowpass around 63 also and sub highpass off.

output wise its best to get the system scoped and then only can set the gains properly.

[wengweng]

Yeah very complicated. Yes, if all crossover applied, it will be rojak. Double filtering, "double" slopes. I'm guessing you have not enough amp channel that's why you have to use the component's passive crossover ?

If you intend to go active - use only either the HU or 701, as zenn mentioned. Either way, it is considered active.

Semi-active - tweeter and midrange use passive crossover. Midbass active. You still have to HP the tweeter_midrange combo

Passive - HP only to the passive crossover. If this is the case, you dont need the crossover from 701.

Bi/Tri amp - active, but go through the passive crossover

What's your system configuration ? 

[qcb7819]

Multi-amplification:- the purpose to use multiple amp to divide the frequency spec into smaller division.
the setup is:-

HU-H701-front & sub (each has it own amp to run)
HU-amp-rear(component)
this is the main system

Front tweet and center channel hook up from another amp but seldom switch on (also run thru H701), unless trying to zeroing the center stage, like I said earlier, seldom switch on.

B4, I used to hooked up the rear to the H701, and the output sound far away, guess due to the xover from the amp, component and the H701. (that is why whether the "rojak" or "cat and dog mixed together" thing come up).

[wengweng]

Looks like you have dedicated amp for active. H701 is capable to run them. Why not run everything from HU --> 701 --> Amps --> Speakers ? Dont use the passive crossover for the moment and see how first

[qcb7819]

Looks like you have dedicated amp for active. H701 is capable to run them. Why not run everything from HU --> 701 --> Amps --> Speakers ? Dont use the passive crossover for the moment and see how first

HU --> 701 --> Amps --> Speakers,
the amp is set to bypass/full
the component (2way) w/o the passive, process from the 701, runs by amp (2 ch) = midbass/midrange (disconnect the tweet)

[louisl]

Throw your passive xo and use your 701 control your speaker 

[qcb7819]

wish I could do that, cos the driver applied are Boston Acoustic Pro and MTX TXC6.1

[wengweng]

HU --> 701 --> Amps --> Speakers,
the amp is set to bypass/full
the component (2way) w/o the passive, process from the 701, runs by amp (2 ch) = midbass/midrange (disconnect the tweet)

Dont understand leh. Why not give us details of your system, including the brands and model of your equipment ?

Boston Acoustic Pro and TXC6.1 are coaxial speakers ?

[qcb7819]

front
LRx2.4 --> boston pro6

rear
cd200a --> mtx txc6.1

sub
coustic pl --> mtx t5500

center & tweet
pg R 8.0:4  --> alpineDLB-100R & mtx TX1000

hu & processor
cda9955 & h701

"Boston Acoustic Pro and TXC6.1 are coaxial speakers ?"

sifu WW,
these guys comes along with passive xo.
the amp has xo, h701 have xo. javascript:void(0);
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If hooked up, the output: "God knows what"javascript:void(0);
60

[craziechild]

if the Boston and MTX comes along with the out board passives and are component set... you can either use them to run passive setup or NOT use them to run active setup...

while on the amp... you can bypass the xover...

all you have to use is the 701 xover... tht is sufficient...

hope this helps...

cheers...

[wengweng]

Oh now it is clearer...you have 4 amps !

If it was me, I would :

1. Run everything thru 701. Control everything thru 701. Set the crossover at the amps there to bypass/fullrange
2. Use the 4 channel PG amp to run the front 6" and tweeter active (keep the passive crossover at home)
3. Use the LRx to run the center channel
4. rear (with passive xover) and sub no change

[Zenn]

oh so its a 5.1 system, and judging by the equipment u have, u can run full active.  no need to use the passive crossover for the front components.

amps:
audison lrx 2.4 (130W x 2)
CD200A im guessing its Clif Designs 80W x 2
coustic sub amp
pg R 8.0:4 (75W x 4)

what i suggest is from pxa:
front 1 - 2ch of the PG amp for Boston tweeters
front 2 - audison 2ch for boston mids
rear - Cd amp for mtx rears
sub - coustic amp for mtx sub
center - one of the remaining 2ch of the PG amp for the alpine center

all amp filters should be off, or full (if cant off)

[qcb7819]

Sifu2 sekian.......javascript:void(0);
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Thanks for the recommendations and suggestions which I will applied. 2moro will be the d-day, will rip the system up and reconfigure it once again.....

Thanks also to Louisl for giving info that there is a reputable installer here, have met him last Friday and Sunday will rip up the system.

I do know that passive and active are not meant for each other, javascript:void(0);
58 not even marriage made in heaven neither marriage out of coincidence... but the place where I get the TXC6.1 insisted on it and I played along, thinking it's a new thing... unfortunately CURIOSITY KILLS THE CAT AND THE SOUND SYSTEM.  javascript:void(0);
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Besides, the tweet is too pitchy... even though the xo setting is HPfc 1k, HP slope at 18... (must be the mtx, will be replace with the r2904/700k 2moro)

will update the outcome

[wengweng]

Fuiyoh.....scans 700000. Very soon, you need to upgrade your HU, your processor, your amp, your RCA/wires, your power caps, your power cables, your alternator, your battery, your soundproof, even your car ! And that means money. With scanspeak 700000, I budget that you need at least RM20k-RM30k in the not too distant future to overhaul your system to satisfy your ears. If not, your other equipment is not matching. Dont worry, there are many people around you to "help" you spend the money and make you feel it is well worth it. You would even thank them ! hahahahaha. Some of them are just enthusiast, some are businessmen.

Whoever told you passive and active do not meant for each other does not really know the whole picture. Your better seek second opinion

Sometimes I feel very guilty to join the ice forums........

[craziechild]

jus check louisl's scan 70k sold together with the other revelantor mids and passives...

7819, you bought them??? hehehe...

[qcb7819]

Just the tweeet... he did offer the whole set, but can't take them since already have my own drivers... only if a month ago, I would have taken them,

bump to him and to you guys

[Zenn]

Besides, the tweet is too pitchy... even though the xo setting is HPfc 1k, HP slope at 18...

tweeter highpass at 1khz?? thats way too low, tweet will blow soon, try 2500 @ 12db and play around from there

[ahmisuhairi]

2904/70k i think better to cross 2.5k-3.2k over...