Closed Thread
Page 1 of 2 1 2 LastLast
Results 1 to 15 of 27

Reload Thread: Active setup how powerful of amp?

  1. #1
    gocards's Avatar
    gocards is offline Junior Member



    Join Date
    Dec 2012
    Location
    St. Louis
    Posts
    9
    Post Thanks / Like
    Mentioned
    0 Post(s)

    Active setup how powerful of amp?

    I am trying running an active setup for the first time with one set of DLS up6i components I just bought along with a Pioneer Prs 80 Head Unit and I need a 4ch amp. (Sub and amp for sub are already taken care of)

    The UP6i speakers are rated at 150rms / 180max 4ohms.
    I know the tweeter is rated at 50rms / 80max 4ohms (per the manual on DLS website) and I cant find specs for the mid woofer but a DLS rep told me they run at 150rms (doesnt sound correct)?

    What rms ratings should I be looking for for an amplifier to run these active? My understanding is that I could run 100w rmsx4 amp and turn down the gains for the tweeters to properly run these.
    Will this be enough Power? Could I go with more power, say 125x4 safely?

    I appreciate any help you guys can give me!







  2. #2
    neo_styles's Avatar
    neo_styles is offline AKA Pop Twidget



    Join Date
    Sep 2012
    Location
    Porter Ranch, CA
    Age
    28
    Posts
    3,581
    Post Thanks / Like
    Mentioned
    50 Post(s)

    Re: Active setup how powerful of amp?

    MOAR POWER!>!!!!

    You can always get an amp that will put out more power than rated and just be conservative with your gains. I'm sure the last thing you want to is cram your cargo space with a bunch of 2-channel amps. A PPI P900.4 or SS TN4.900 would be great choices with their tiny footprint and 200-dollar price tag.



    Deck: JVC KD-A95BT
    Speakers: PHD FB mid, JBL MS tweets
    Amps: Boston Acoustics GT-2125, Zed Minotaur III (x2)
    Sub: 10" SSA ICON, IA Death Penalty 18" (coming soon)
    Starr Mountain Sound Nuthugger #2 (I'm a #2 lol)
    dcarcustoms Nuthugger #1
    Spotify: http://open.spotify.com/user/neo_styles/playlist/6t9ru42j0wbEsuo4bXqXD8
    PROUD MEMBER OF TEAM VERTEX

  3. #3
    gocards's Avatar
    gocards is offline Junior Member

    Threadstarter


    Join Date
    Dec 2012
    Location
    St. Louis
    Posts
    9
    Post Thanks / Like
    Mentioned
    0 Post(s)

    Re: Active setup how powerful of amp?

    Ok thanks, that clears it up. I will be going with the PPI p900.4




  4. #4
    Join Date
    Sep 2011
    Location
    Tennessee
    Age
    34
    Posts
    318
    Post Thanks / Like
    Images
    3
    Mentioned
    0 Post(s)

    Re: Active setup how powerful of amp?

    I have experience with a PPI Black Ice BK800.4 amp. It's a monster amp for a steal of a price. It has active capable crossovers in case your 80 PRS doesn't stick around for some reason.



    Simple SQ System:

    Head Unit: Alpine CDA-117
    Active Crossover: Cache' CEX
    Front Stage Amp: Boston Acoustics GTA-704
    Components: Polk Audio DB 6501
    Sub Amp: Boston Acoustics GTA-1000m
    Sub: JBL P1224, 2.5 ft^3 @ 25 hz enclosure
    Rear Fill: Sony Xplod 5.25s on HU power lolz

  5. #5
    esmokah's Avatar
    esmokah is offline Dabbed Out



    Join Date
    Apr 2011
    Location
    North of 8, WI
    Posts
    377
    Post Thanks / Like
    Mentioned
    0 Post(s)

    Re: Active setup how powerful of amp?

    I picked up a p900.4 to replace my massive nx4. i will get it in tonight but I don't think I will mess with it too much.



    Head Unit: Pioneer avh-4300dvd,
    Front Stage: Ascendant Audio 6.75", Massive Audio 28mm tweeters
    Rear Fill: Massive Audio CK6-3 6x9 Woofers
    Amps: PPI Phantom P900.4, Sundown Audio SAZ-2500D
    Sub: RE Audio XXX 12" 2.25^3 Tuned to 32

    They sell Kicker at Wal-Mart now. That's saying a lot..

  6. #6
    gocards's Avatar
    gocards is offline Junior Member

    Threadstarter


    Join Date
    Dec 2012
    Location
    St. Louis
    Posts
    9
    Post Thanks / Like
    Mentioned
    0 Post(s)

    Re: Active setup how powerful of amp?

    Between a PPI Black Ice BK800.4 and a PPI P900.4 which would you choose, pricing aside?

    BK800.4 specs:
    130x4 .55% THD+noise

    PPI P900.4 Specs
    power output @ 1.0% THD, 14.4V
    145W x 4 @ 4ohm

    Would the differences in SQ even be noticeable at those levels?




  7. #7
    Join Date
    Sep 2011
    Location
    Tennessee
    Age
    34
    Posts
    318
    Post Thanks / Like
    Images
    3
    Mentioned
    0 Post(s)

    Re: Active setup how powerful of amp?

    Black Ice is a little bigger, but it's Class AB vs the Class D of the Phantom. Opinions vary regarding the SQ of Class D fullrange amps, but I doubt there's any audible difference. It comes down to personal preference. I like the looks of the Black Ice quite a bit better personally.



    Simple SQ System:

    Head Unit: Alpine CDA-117
    Active Crossover: Cache' CEX
    Front Stage Amp: Boston Acoustics GTA-704
    Components: Polk Audio DB 6501
    Sub Amp: Boston Acoustics GTA-1000m
    Sub: JBL P1224, 2.5 ft^3 @ 25 hz enclosure
    Rear Fill: Sony Xplod 5.25s on HU power lolz

  8. #8
    zako's Avatar
    zako is offline CarAudio.com Elite



    Join Date
    Jan 2011
    Location
    TX
    Posts
    1,347
    Post Thanks / Like
    Mentioned
    6 Post(s)

    Re: Active setup how powerful of amp?

    Quote Originally Posted by gocards View Post
    Between a PPI Black Ice BK800.4 and a PPI P900.4 which would you choose, pricing aside?

    BK800.4 specs:
    130x4 .55% THD+noise
    I am not suite sure where you pulled these "specs" from. They're not on PPI web site as far as I can see. Don't tell me "sonicelectronix". Their web masters often don't know what amplifier "THD" spec is, and post random crap in their "spec" table. I wouldn't worry about the THD of these amps. However, a while ago someone posted the channel separation spec for PPI P900.4 at 1KHz, and I didn't like it a lot (it was 30ish). My preference would be to see it at >50dB. 99% of time this shouldn't matter at all since most people don't optimize for good imaging by the means of EQ and time alignment. But if you're building an SQ system where one of the goals is consistent imaging, that may not be a desirable spec if the amplifier is to power tweeters (channel separation gets worse with each octave.. so a crosstalk of 30dB 1KHz can become 10dB at high frequencies). This is still a great amp given the price of $200. You can't always have every parameter and spec to be in the optimal range for such price. Unfortunately, I haven't see a third party test of PPI Phantom amps that would either confirm or deny this.

    However, if you're running active, using PPI P900.4 to power tweeters may be overkill to begin with. I'd use this amp to power mids and subwoofer (with bridged channels) and power tweeter with something like (like head unit, or may be something like Boston Acoustics GT-275).




  9. #9
    neo_styles's Avatar
    neo_styles is offline AKA Pop Twidget



    Join Date
    Sep 2012
    Location
    Porter Ranch, CA
    Age
    28
    Posts
    3,581
    Post Thanks / Like
    Mentioned
    50 Post(s)

    Re: Active setup how powerful of amp?

    Maybe he got it from the manual? It's been a while since I looked into it, but that's the only place I'd trust spec-wise.



    Deck: JVC KD-A95BT
    Speakers: PHD FB mid, JBL MS tweets
    Amps: Boston Acoustics GT-2125, Zed Minotaur III (x2)
    Sub: 10" SSA ICON, IA Death Penalty 18" (coming soon)
    Starr Mountain Sound Nuthugger #2 (I'm a #2 lol)
    dcarcustoms Nuthugger #1
    Spotify: http://open.spotify.com/user/neo_styles/playlist/6t9ru42j0wbEsuo4bXqXD8
    PROUD MEMBER OF TEAM VERTEX

  10. #10
    neo_styles's Avatar
    neo_styles is offline AKA Pop Twidget



    Join Date
    Sep 2012
    Location
    Porter Ranch, CA
    Age
    28
    Posts
    3,581
    Post Thanks / Like
    Mentioned
    50 Post(s)

    Re: Active setup how powerful of amp?

    Nope, just checked the manual, no THD spec.



    Deck: JVC KD-A95BT
    Speakers: PHD FB mid, JBL MS tweets
    Amps: Boston Acoustics GT-2125, Zed Minotaur III (x2)
    Sub: 10" SSA ICON, IA Death Penalty 18" (coming soon)
    Starr Mountain Sound Nuthugger #2 (I'm a #2 lol)
    dcarcustoms Nuthugger #1
    Spotify: http://open.spotify.com/user/neo_styles/playlist/6t9ru42j0wbEsuo4bXqXD8
    PROUD MEMBER OF TEAM VERTEX

  11. #11
    gocards's Avatar
    gocards is offline Junior Member

    Threadstarter


    Join Date
    Dec 2012
    Location
    St. Louis
    Posts
    9
    Post Thanks / Like
    Mentioned
    0 Post(s)

    Re: Active setup how powerful of amp?

    I had to search around various sources to find the specs on the BK800.4, so you are probably correct in assuming that these are unreliable.

    Will the PPI P900.4 be too powerful of an amp for these tweeters even with the gains turned down appropriately? they are rated at 50 rms, 80 max. I don't want to burn these tweeters up but I want enough power for the woofers.

    I would like to stay within a 200 budget for the amp and I have a sub-woofer amp already, all I have left to get is the amp and head unit.
    I also want to try the active setup out vs passive (I have never heard active but I like a challenge and it would be worth it to have better sq to me).

    If the channel separation is going to be significant, then is there a better amp I could go with for around the same price range? or maybe two 2-channel amps instead? (150rms for woofers, 50 rms for tweeters)




  12. #12
    gocards's Avatar
    gocards is offline Junior Member

    Threadstarter


    Join Date
    Dec 2012
    Location
    St. Louis
    Posts
    9
    Post Thanks / Like
    Mentioned
    0 Post(s)

    Re: Active setup how powerful of amp?

    Ok I think that I am going to go with one of these two options for my active setup unless you guys have an alternative suggestion for roughly the same cost:

    1) Bi amp with Soundstream PX2.200 for tweeters and Soundstream PX2.580 for the woofers
    PX2.200 runs 70x2 rms, tweeters take 50 rms/80 max
    PX2.580 runs 190x2 rms, woofers take 150 rms/180 max
    This way I would not have to worry about channel seperation as with two amps it would basically be a non-issue(besides crosstalk in the HU which is not avoidable)

    2) Single amp with PPI P900.4 for tweeters and woofers
    P900.4 runs 145x4 rms, tweeters take 50 rms/80 max, woofers take 150 rms/180 max.
    This would take up less space and be an easier install but Im afraid it wouldnt sound as good with the crosstalk of tweeter and woofer channels

    Im leaning towards setup number one now. Is there any reason that this is not a good option? Either one will cost me around 200.




  13. #13
    Join Date
    Sep 2011
    Location
    Tennessee
    Age
    34
    Posts
    318
    Post Thanks / Like
    Images
    3
    Mentioned
    0 Post(s)

    Re: Active setup how powerful of amp?

    There's pros and cons to each.

    A single amp solution is simpler and easier to install properly/find a location for/etc. However, you will waste a good bit of the power of 2 of your channels by only powering tweeters.

    A bi-amp solution makes better use of the available power, but is more complex to install and integrate into an amp rack or whatever. It definitely takes up more space and requires more RCAs, power and ground wires, distribution blocks, etc. You also gotta fit a sub amp along with them if you're running a sub.

    You can see in my avatar that I only had enough room for a 4 channel, a mono, and a small crossover on my amp rack. I thought about bi-amping my front stage so I could bridge my 4 channel, but my whole amp rack design would've had to be pretty weird looking to make it work. Car audio is full of compromises.

    Your call.



    Simple SQ System:

    Head Unit: Alpine CDA-117
    Active Crossover: Cache' CEX
    Front Stage Amp: Boston Acoustics GTA-704
    Components: Polk Audio DB 6501
    Sub Amp: Boston Acoustics GTA-1000m
    Sub: JBL P1224, 2.5 ft^3 @ 25 hz enclosure
    Rear Fill: Sony Xplod 5.25s on HU power lolz

  14. #14
    trumpet's Avatar
    trumpet is offline Supporting Vendor trumpet is a Supporting Member of the forum!

    trumpet is a Supporting Vendor of the forum!

    Join Date
    Jan 2011
    Location
    Langdon, ND
    Age
    33
    Posts
    4,399
    Post Thanks / Like
    Mentioned
    75 Post(s)

    Re: Active setup how powerful of amp?

    You can run tweeters on a P900.4 or similar amplifier. The gain adjustment is one way to turn down the levels to match your woofers, plus your head unit or processor may have a level adjustment in addition to EQ.

    Regarding the P900.4 vs BK800.4, the P900.4 is a much smaller amplifier. You will never fit a BK800.4 under a front seat, whereas that's easy with a P900.4. If you don't care about space then it comes down to Class AB vs Class D. The P900.4 has been tested to have a ruler flat frequency response as well as making "clean" power up to and beyond its rating of 145W per channel. In my mind that eliminates any question of "will it sound good enough for me?". For someone who obsesses over the sound of Class AB or even Class A vs the rest, I don't know what to tell you as I'm tired of that debate. Class D is more efficient, and so that's a nod toward the P900.4.




    Small town service, family owned and operated. See our new mobile friendly web site at www.513electronics.com
    Home to CDT Audio's Systems Design Specialist
    Our CDT Audio dealer store, Clarion,_JBL,_Pioneer,_Precision_Power,_RE_Audio,_DB Drive,_Metra,_T-Spec, perfect fit speaker kits for your vehicle
    My system: Pioneer AVH-4000NEX, JBL MS-8, Clarion XC6610 x 2, CDT 6.7"/4"/1.1" in the front doors, 4"/1.1" center channel, QES-1220 12" x 2, Clarion SRG-1622R rear fill

  15. #15
    gckless's Avatar
    gckless is offline CarAudio.com Veteran



    Join Date
    Aug 2011
    Location
    San Antonio
    Posts
    4,106
    Post Thanks / Like
    Mentioned
    28 Post(s)

    Re: Active setup how powerful of amp?

    Quote Originally Posted by trumpet View Post
    You can run tweeters on a P900.4 or similar amplifier. The gain adjustment is one way to turn down the levels to match your woofers, plus your head unit or processor may have a level adjustment in addition to EQ.

    Regarding the P900.4 vs BK800.4, the P900.4 is a much smaller amplifier. You will never fit a BK800.4 under a front seat, whereas that's easy with a P900.4. If you don't care about space then it comes down to Class AB vs Class D. The P900.4 has been tested to have a ruler flat frequency response as well as making "clean" power up to and beyond its rating of 145W per channel. In my mind that eliminates any question of "will it sound good enough for me?". For someone who obsesses over the sound of Class AB or even Class A vs the rest, I don't know what to tell you as I'm tired of that debate. Class D is more efficient, and so that's a nod toward the P900.4.
    Without getting into the debate of class A vs. AB vs. D, I would like to reiterate the efficiency advantage. Depending on what amp you choose, and what amp you decide to go with (or have?) for your subs, and how your car's electrical looks like right now, you may or may not need to spend a bit on electrical upgrades. Beefing up electrical can potentially add up quick.



    Quote Originally Posted by ducatipaso View Post
    15inch subs can't play fast beats, they take more power and that taxes the vehicles electrical system. You will wake up and "hear" then see the light at the end of the tunnel and it will be 3 10's pounding so hard you wont even open your trunk or turn your system on because you 15's will sound sloppy & weak.
    Quote Originally Posted by benbenondatrack View Post
    stfu lesbo.why are you worried about me so much? you must want to date me ya little cookie monster but i dont even like sweets. your just a cup full of ice, dirt dead nasty azz ice...without the water.

    Dat Build Log: http://mobileaudioforum.com/forum/showthread.php?2566-1999-Chevrolet-Blazer&highlight=1999+blazer

Closed Thread
Page 1 of 2 1 2 LastLast

Similar Threads

  1. How powerful of an amp do I need?
    By obivouslyasd in forum Amplifiers
    Replies: 15
    Last Post: 11-06-2011, 04:59 PM
  2. Peak Power of amp
    By Steven206Seattl in forum Amplifiers
    Replies: 8
    Last Post: 08-03-2006, 07:51 PM
  3. question about the power of amps
    By Skeeter51 in forum Amplifiers
    Replies: 2
    Last Post: 06-02-2006, 05:23 PM
  4. how big of amp
    By anderson1234 in forum Amplifiers
    Replies: 1
    Last Post: 11-26-2005, 04:40 PM
  5. How Powerful Of An Amp Do I Need
    By caraudionewbie in forum Amplifiers
    Replies: 1
    Last Post: 05-17-2002, 08:16 PM

Tags for this Thread

Posting Permissions

  • You may not post new threads
  • You may post replies
  • You may post attachments
  • You may edit your posts

1e2 Forum