4 Resonant Engineering 8's

William from NOLA · Post by **William from NOLA** » Fri Mar 03, 2006 5:31 pm

Agreed on phase. Can you try wiring for a different load too if phase isn't the answer?

audiocr381ve · Post by **audiocr381ve** » Fri Mar 03, 2006 5:34 pm

Yea man I'm willing to do anything , but wouldn't a different ohm load make the subs see different wattage?

William from NOLA · Post by **William from NOLA** » Fri Mar 03, 2006 5:35 pm

audiocr381ve wrote:Yes I know that , I just meant that each sub sounds good ALONE. I got two of them to sound good still wired as if I was going for two ohms with all 4 subs.
Two questions guys.
Can running two for right now do damage to the other subs?
And how much juice is each sub getting right now (the two that are hooked up)?

You won't damage them as long as no power is going through them.

Two hooked up at 2 ohms would be 300 each. 4 at 2 ohms would be 150 each.

Yea man I'm willing to do anything , but wouldn't a different ohm load make the subs see different wattage?

Yea, but re8's don't really need a ton of power do they?

audiocr381ve · Post by **audiocr381ve** » Fri Mar 03, 2006 5:36 pm

What about 2 at 4 ohms?

William from NOLA · Post by **William from NOLA** » Fri Mar 03, 2006 5:38 pm

150 each, comeon dude, basic math

600w at 2 ohms or 300w at 4 ohms from a BP600.1

divide it among the drivers evenly

audiocr381ve · Post by **audiocr381ve** » Fri Mar 03, 2006 5:40 pm

geez. Thanks. I'll keep you guys updated so anyone else with this pesky problem can figure it out in the future.

High Society · Post by **High Society** » Fri Mar 03, 2006 8:55 pm

hmm these should be wanging hella hard. I had four also and were hitting hella hard. I had them wired at a two ohm load also. I would say it's wired outta phase too.

make sure they are wired like this

http://www.rockfordfosgate.com/rftech/w ... 4+ohms+x+2

geolemon · Post by **geolemon** » Fri Mar 03, 2006 9:28 pm

You can check phase REALLY easily with a 9v battery.
Find a smoke detector and rob it of it's battery for a minute.

Seriously, I keep fresh ones around just for this purpose.

With all four subs wired up, go to your amplifier, your final wiring there, and disconnect the wires from the amp.

Touch the end of the wires to the battery... positive wire to the positive terminal on the battery.

You SHOULD see all the cones move OUT simultaniously, and stay out until you remove the battery.
If one of them moves IN instead, you have found your culprit.

And if they all move out together - you've confirmed that they are all wired relatively "in phase".

This is the easiest, fastest way to check phase, and it's correct every time - even in cases where the speaker terminals may have been installed backwards or marked incorrectly.

geolemon · Post by **geolemon** » Fri Mar 03, 2006 9:32 pm

If your enclosure isn't divided into chambers, also, then it will sound dramatically different (no comment here on "better" or "worse"

) when you have one hooked up, compared to two, compared to four...

...one reason is - the sub is in an enclosure four times as large as with all four running, effectively. That'll make the single sub extend lower, and not have such a pronounced midbass compared to with all four running.

...another reason is - with only one sub hooked up, and three "dead" - the other three are acting as "passive radiators" - somewhat equivalent to a port - and three of them would "tune" the enclosure quite low - also extending the low frequencies, while minimizing the upper bass... compared to having all four running.

It may be that they are in an enclosure too small for them - although visually, I wouldn't guess that.

check the relative phase of all of them, and then troubleshoot from there.

Post by **GlassWolf** » Fri Mar 03, 2006 10:33 pm

~listen what the man said~

-paul mccartney