---------------------------------------------------------- XDP4000X-List Digest Archive --- Total Messages Posted Wed 12/25/02: 2 ---------------------------------------------------------- Today's Message Index: ---------------------- 1. 04:05 AM - Re: Any amplifier recommendations? (Dremgragen .) 2. 06:34 PM - Re: Any amplifier recommendations? (NOTGSXR@aol.com) ________________________________ Message 1 _____________________________________ Time: 04:05:20 AM PST US From: "Dremgragen ." Subject: RE: XDP4000X-List: Any amplifier recommendations? --> XDP4000X-List message posted by: "Dremgragen ." Oh yes, I forgot my #1 choice. I guess I just forgot to include it, as I consider it more "in my dreams" type equipment rather than truly attainable... Diamond D7 series 'Tis what my dreams are made of anyway. Damn are they sexy. :) -Brody From: Jose Reyes Subject: RE: XDP4000X-List: Any amplifier recommendations? -- XDP4000X-List message posted by: Jose Reyes I'm pretty happy with my JL Audio Amps. -----Original Message----- From: Dremgragen . [mailto:dremgragen@hotmail.com] Subject: Re: XDP4000X-List: Any amplifier recommendations? -- XDP4000X-List message posted by: "Dremgragen ." If it were me, I'd go with: Zapco Audison US Amps or Brax / Helix in that order. :) -Brody From: "Bobby" Subject: Re: XDP4000X-List: Any amplifier recommendations? -- XDP4000X-List message posted by: "Bobby" I definately have enough room for multipul amp's. I know that the Alpine amp that I'm running does have a built in parametric crossover, but I bypass that altogether, so I doubt that is affecting any sound coming from it. As for wiring in the car, it seems very stable, wtih 2 ga cable as a power lead to a 5 farad power cap. My sub amp is running stereo, as is, since it will not accept any lower impedance. I've experimented with parallel and series wiring, and all in all, the stereo!! option gives me the cleanest sound, even though it's at the lowest power rating. I'm just looking for something out of the ordinarly for clarity and purity. Honestly, I feel the phoenix gold M100 would serve me best in my subwoofer application, along with using my current sub amp as a rear mid bass fill, keeping my Phoenix Gold M50 for fronts, possibly adding a second amp dedicated to the front in time. That's my current plan, what do you think? ----- Original Message ----- From: "Paul Chambers" Subject: RE: XDP4000X-List: Any amplifier recommendations? -- XDP4000X-List message posted by: "Paul Chambers" Hi Bobby, You should probably give us an idea of your budget... ;) So far, my installs have been somewhat constrained on space, so requiring multichannel amps. What about you? Sounds like you have room for enough stereo amps for everything? Something perhaps worth mentioning is that the analog crossovers built into many amps can get in the way if you have a 4000x. An analog filter plays havoc with the phase of a signal as it approaches the cutoff frequency. As do crossovers, another form of analog filter (and more primitive than the active crossover in a good amp). To get the best benefits from having a 4000x in your system, I'd recommend choosing amps that don't have built-in crossover filters, or filters that are truely defeatable. It should help imaging and soundstage. And if you still have crossovers in circuit, now's the time to pull them out... As far as the subs go, it's not just raw power, but also control of the load, that marks an amp as good for subwoofer use. There's a lot of mass to get moving in a 12" sub, and a fair amount of energy is required to accellerate and decellerate it. Plus there's a phenomenon called 'back EMF' - energy that's 'returned' to the amplifier from wound coils when their magnetic field colapses (at least that's my simplistic understanding). I don't know whether it's 'conventional wisdom', but I'd recommend that you dedicate an amp channel to each sub, and look for amps that are designed with subwoofers in mind. Keeping the load an amplifier has to deal with as simple as possible (i.e. one coil) should help it in its task of moving the sub's cone to accurately follow the incoming signal. Also pay particular attention to supplying the subwoofer amps with healthy doses of current - stout power wiring and a large cap close to the amp's power terminals could easily make more difference than one brand vs. another, in my opinion. It matters more for subs than for the other stuff put together. Just one guy's opinion, for what it's worth :) Paul p.s. please forgive me if I'm stating the obvious... -----Original Message----- From: owner-xdp4000x-list-server@matronics.com [mailto:owner-xdp4000x-list-server@matronics.com] On Behalf Of Bobby Sent: Saturday, December 21, 2002 8:36 PM To: xdp4000x-list@matronics.com Subject: XDP4000X-List: Any amplifier recommendations? -- XDP4000X-List message posted by: "Bobby" I've come a step closer to building my dream system by getting my hands on a 4000x a few months back. Now towards the next step in my quest, I find myself with alot of different options and directions that I can take, and I was wondering if anyone has any opinions to offer. I am seeking just pure, clean sound, not just spl. I want the most accurate reproduction of the music as possible. I've caught myself in interest in later model Phoenix Gold M Series amplifiers, due to the many hookup options, but I was wondering if anyone out there has any amplifier recommendations. Currently I'm running a Phoenix Gold M50 for my front component set, and old Pioneer 100X2 amp for my rear mid bass, and an Alpine MRV-1505 for subs. I love the sound from the M50, but the other two amps seem to be lacking both in power and quality. Obviously, the pioneer amp will have to go, but I was unhappily surprised at the final image the Alpine amp reproduced. It just doesn't seem to have what I'm looking for. I'm running 2 12" sealed subs, so maybe it just doesn't have enough power, I'm not sure. Well, any opinions would be welcome. Thanks in advance. Bobby STOP MORE SPAM with the new MSN 8 and get href="http://g.msn.com/8HMMEN/2016"3 months FREE*. ________________________________ Message 2 _____________________________________ Time: 06:34:28 PM PST US From: NOTGSXR@aol.com Subject: Re: XDP4000X-List: Any amplifier recommendations? --> XDP4000X-List message posted by: NOTGSXR@aol.com In a message dated 12/25/02 7:06:33 AM Eastern Standard Time, dremgragen@hotmail.com writes: > Oh yes, I forgot my #1 choice. I guess I just forgot to include it, as I > consider it more "in my dreams" type equipment rather than truly > attainable... > > Diamond D7 series > > 'Tis what my dreams are made of anyway. Damn are they sexy. > > :) -Brody > I've seen and heard the Diamond amps...... i can say, fit and finish they are great...... i'm not sure i can justify the price however... I'll stick with the old A/D/S stuff :) of course, if i did not have the XDP 4000X, the Diamond amps would be great for their very versatile Xover's.......... Great amps, beautiful amps........ but always that ?? in the back of my head :) Dan