how would you power the components with this amp?

memphis belle 1300/5 at 2ohm= 115x4, 600x1

the components are focal 165 k3p. the sub is a jl 10w6v3. the head unit is an alpine iva-d900. should i run the front and rear to the midbass and midrange and use the hu for the tweets or what?? does this sound like a descent combo?

 

Lots of options. Depends upon what options that that headunit you are running has and if you plan on using the entire function of the 3 way passive crossovers. Also if you plan on using an external powered crossover or not.

I have a 5 channel amp now and is running the mids/tweets through the passive crossovers from channels 1/2, running the midbass alone through the HU crossover from channels 3/4 and channel 5 is pushing the bass. If you have a 3 way crossover built into your headunit you have some options on how you want to power it. (need to go look at the d900)

Generally speaking the tweets need the least amount of power, the midbasses need the most. You could opt to run the tweets from the headunit but you would need to figure out how to handle their crossover, or if using the passive how you are going to handle the bandpass of the midrange and midbass. (high pass and low pass for each)

Let me look around a bit will get back to ya

Fej

 

I would probably recommend running the system how I have mine which is:

Channel 1/2 running the midrange and the tweet.
HP midrange handled by HU crossover OR the passive (passive at 300hz)
LP midrange handled by passive crossover (3.5k@12db)
HP tweet handled by passive crossover (3.5k@12db)
Channel 3/4 running midbass.
HP midbass handled by HU crossover (12db at roughly 80hz)
LP midbass handled either by passive or HU (both 12db)
Channel 5 for the bass.

Options here are tuning preference. 300hz should be a pretty good point for a coned 4" speaker to play up from. The passives are tuned pretty well usually speaking for a set up like yours. With only a 12db slope available from the HU getting much below 80hz might be tough for the front stage (6.5's) to play. Would recommend deadening the doors for sure if you want nice midbass up front with you.

A trick you could use with the HP point on the midbass would be to set the HU AND the amp at the same frequency and you get a small "stacking" of the rolloff and you might be able to get away with a mid 70hz or down to around 63hz front stage HP point for your mids.

Run your sub at the hz rate and down from your front stage and you should be gtg. More technical you can PM me if you want. I am sure there will be some more posts coming to help.

BTW I suggested the following to get the midbass the most available power to have on their own as they need the most to really see their true performance (and the main reason that manufacturers recommend their 3 way systems at 200 watts RMS or more, the midbass NEED power) This way you can also gain them seperately to get the desired balance between your midbass and the midrange/tweet.

I have my channel 1/2 at minimum gain (70 watts x2) my midbass channels at about 5% gain (70x2) and the sub at about 10% gain (250x1)

HP= high pass point
LP = low pass point

G'luck
Fej

 

Fej has given you good advice. I went searching for the items you are planning to use. I found the Focal and Alpine stuff but couldn't find the 10w6v3. I found a 10w6v2 and a 10w6....so hopefully this info is of some use.

It appears there may be a crossover built into the Alpine HU. If you don't want to go as complex as Fej suggested, you may be able to bridge channels 1/2 and 3/4 of the Memphis. This should give you 230w RMS x2 @ 4 ohm. I couldn't find out the impedance of the Focals, but guessing it would be 4 ohm into their passive crossover. Focal stated the input power requirement to be 200w RMS to each passive crossover.

This would leave channel 5 of the Memphis for the sub. Depending on the impedance of the voice coil(s) of that JL Audio and how you wired it, you would have 300w RMS @ 4 ohm or 600w RMS @ 2 ohm available from the amp.

You have a nice list of items there. You'll have to let me know how you like the Memphis as it is one I am considering for my system (amongst many other amps)

 

thanks for the help guys. your right, it is a 10w6v2. it is a 3 ohm sub so would i be able to run the 5th chanel at 2 ohm to get 600w to it?

 

That should be a dual 4 ohm sub, wired in parallel from both coils will get you the 2 ohm you are looking for.

Fej

 

I am with Fej on this one, I thought I had seen the 10w6v2 was a dual 4 ohm sub. The 10w6 was a dual 3 ohm. Wire that 10w6v2 in parallel to get a 2 ohm load to the amp.

 

Do a combination as what Duramax Dave and fej said.
Bridge the 4 channels to the Focals and just use the Focal crossover. The way fej suggested can be better (passive crossover will absorb some wattage whereas active crossover do not)(also, active crossover usually have steeper slopes, which is better too) but is also harder to do. Focal has spent many $ researching what crossovers work best with their speakers, personally I'd use the supplied crossover unless the install was for serious sound quality competitions.
From my little research, Fej is right. That sub is a dual 4 ohm which will give you a 2 ohm load.

Welcome to the best forum on the web

 

Knew is right on the passives. fej and I have hashed over this before, but here it goes. There is nothing wrong with running mids bridged at 2ohms, when using passive xovers. I do. In our last conversation about this I forgot to mention(to fej) the fact that I run passive xovers. A first order xover(-6db) will introduce tripple the resistance or 16 ohms for a 4ohm system. So running them in 2ohm w/ a 1st order xover will put your amp seeing an 8ohm load because your amp is starting at +3 db w/ a 2ohm load. fej, I guess I should have said(in that earlier post) mids at 2ohm dont sound any different "when using passive xovers". Does that make more sense. Oh and as a side note for everybody building passive xovers. Although a 3rd order xover run your speaker at peak efficiency your cutting down power tremendiously. A tweeter x'ed at 5000hz hi pass w/ a 100 watt amp and a 3rd order(-18db) xover will only receive about 1.6 watts at 2500hz as opposed to 25 watts w/ a 1st order xover at full output or 6.25 watts w/ a 2nd orde(-12db).

 

I forgot. If you plan on running this amp at 2 ohms across all channels, make sure the amp is well ventilated. I have never run a Memphis amp but most amps will get plently hot running this way.

 

Adown are you talking about bridging channels 1-4 for the components? To get a 2 ohm load for the mids you would have to put the mids on one side only? Sorry confused maybe its early.

Fej

 

No, must be confusion on my part. I just looked back to see what the ---- I was talking about. I thought they were talking running components in a 2ohm setup with passive xovers. Thats when it occured to me that a 2ohm speaker setup with passive equipment isn't a 2ohm load at all, and that I forgot to mention that when we discussed it on an earlier post. I was just agreeing with knew about passive equipment adding resistance and taking power away. That will teach me to read posts at 5:am.

 

ive been looking at the dls a7 amp now. would this amp still have enough power for the front stage? i like the idea of a little smaller amp, if i could get away with it. plus it is better matched to the sub

i might even switch to the dls iridium 6.3i 3 way. seems like that would be a good match for the smaller amp.

alpine iva-d900/ iva-d310
dls a7
dls iridium 6.3i 3 way components
jl 10w6v2

what do you think of the setup?

 

dolf, that sounds like a sweet system.

 

I can speak to the DLS Iridium 3" dome midrange being AWESOME. Very impressed with it. It will not play very low, anything below 300hz and it does not like it. But it will also play up into the 7k hz range very well. In fact I think the stock crossovers cross the tweet up near there although even after researching it all over the place I cannot get confirmation. The DLS midbass's are also rich and detailed, although I prefer the sound of the Focal Polykevlar myself.

I think that you would be very pleased with that set of components.

Fej