First off. I get this system installed in my old Lincoln Mark 8 (Audiobahn 2300HCT and 2 Audiobahn 12" 1206). I totally don't add a 2nd battery or upgrade the big 3, or add a 2nd alternator. Within 2 months of the install, everything electrical went to **** and I had to get another car. Totally my fault for playing the car loud, even with lights dimming to total blackness. I'm guessing I put the car through low voltage?
Ok, so I get the same system put into my new car (2000 Grand Prix) at the same shop. To prevent this car from reaching low voltage, I'm adding a 2nd battery and doing the big 3 upgrade. I ask the shop about the big 3, they said they never heard of it. I printed out the big 3 install thread from this forum, and they said it would be useless. I told them I wanted to do it anyways and that I would pay for it, even though it would be "useless". They agreed.
The guy up front tells me that the reason that my lights are dimming is not because lack of upgrade to stock wiring or lack of a 2nd battery, but because the amp I have on my subs are highly inefficient. He's telling me that if I buy one of their Memphis class D amps, and add a 2nd battery, that the dimming would go away. It's a new salesman this time, one I haven't seen before and I just assume he's trying to sell me something for a commission.
I tell him that I've been thinking about giving this system to my girlfriend anyways, and that I've been thinking about an upgrade anyways (car audio so addictive, already want to upgrade and only had this system like 4 months). So I've been on this website for the past month just reading threads and what not trying to decide how to upgrade. I've already purchased a JL 1000/1 amp from a friend for 300$ (he was hurting for money and trying to help me out at the same time).
So I want to give my current system to my girlfriend, and then use the JL 1000/1 I already have, and maybe get a sub or 2 for myself. I don't know how much better 1 15" would be over 2 12". I can't decide really, but everyone on the forum thinks FI Q would be a good choice, and I listen to mostly rap and I'm thinking that a single 15 FI Q getting around 1k watts would be perfect for me. I take my spec sheet in for the FI Q 15" and I'm showing him what I've been thinking about after much research.
He immediately notices FI, and says "Those subs are a one note wonder, they're made for competitions, and aren't made for playing a full range of notes in a daily driver setup." I'm totally stunned, as I haven't heard anything really negative on these forums about those subs. He then says "How much is that sub, like $150-200? I used to own one of those Q's, I think it was a Q3 or Q4, it was seriously a 1 note wonder". The one I had picked out and was thinking of getting was the 15 Q with BP(i think? the extra cooling option), and it was 300$ total. He sees the $300 and says "Wow, that's expensive for that sub, you seriously don't want that."
And then he proceeds to show me a Memphis 15" that handles about 300 RMS. I like Memphis don't get me wrong, and I am a total noob at this, so I don't know if he's just telling me this to make a commission sale, or if he really just doesn't know about FI audio. So here I am asking you fellas. When he said he had a Q3 or Q4, I didn't even know they had versions like that, so that made me wonder if he ever really owned one.
And 2, I'm thinking I want to keep the same amount of trunk space that I currently have, and I'm thinking that running 2 15's would take up my entire trunk, whereas my current setup still gives me plenty of room. I don't know which subs to get for my JL 1000/1 and really would like help. Would getting 2 500RMS 15" Memphis be much boomier than getting 1 FI Q 15" that can handle the JL by itself?
Also, I'm thinking if I'm going with 2 subs, I'd rather get 2 12" so that I can keep the same trunk space that I have now.
I was pretty confident I was making a good choice with the FI Q 15" when I walked in there, but now he's got me thinking that the FI is a cheap one note wonder sub that isn't good for full range music. Is that true? Would a Memphis be better?
Also, when I suggested that I'd almost rather have 1 15" rather than 2, he pointed me toward a Memphis MOJO (he quoted me $750) and the one he showed me handles 800RMS. He told me that would be perfect for my amp because you only want to have the gains up about 3/4th of the way on the JL 1000/1 before it starts to distort, saying that with that amp, to prevent distortion, I'd only really be getting about 750 RMS out of it anyways, and that's why the MOJO would be a better choice than the FI Q.
Please help I don't know what to choose. I'm almost happy with my current system, as I don't need it too much louder, but my girlfriend is needing a system anyways, and I have this JL just sitting around, so I was planning on upgrading anyways, but I don't need to upgrade too far. So with the FI Q 15", it would cost me around 300$ shipped, plus 200$ for the box, leaving my upgrade at only about 500$. If I go with his MOJO suggestion, I'll be paying 750$ + 200$ making the upgrade around 1000$.
I don't know if he's just trying to make a sale, or if he's really right. What would you guys do? Sorry for this being so long I just wanted to explain everything. Thanks for any help in advance. Flames also welcome.