78 replies to this topic

[megamini_jb]

Cor going to be dear then if I'm looking at something with 300-400 at 4ohms

[megamini_jb]

I've found a JBL mono amp but it's 360 @ 2ohms and only 225 @ 4ohms so is that no good?

[Skortchio]

The 2nd sub you listed is 2ohm, so in fact it would be ideal

http://www.ebay.co.u...4#ht_500wt_1195

[megamini_jb]

Oh yeah. Wooo lol. You guys are awesome. I've never understood how this all works, but I kinda get it now and know what I'm looking at

Edited by megamini_jb, 01 October 2012 - 07:57 PM.

[Skortchio]

Of course the next question, once you have sub and amp is: enclosure, sealed, ported, bandpass? Tuned? MDF or ply?

[megamini_jb]

Let me take a few headache tablet first! lol

What would be best, ported or sealed? The enclosure will be under the false floor so will it make a difference if it was ported or sealed?

[megamini_jb]

I will still have a look at amps but now I definitely know what I'm looking for

Edit: spelling

Edited by megamini_jb, 01 October 2012 - 08:08 PM.

[Skortchio]

Can 'o' worms anyone?

It really depends on what you want your sub to do. At 300w you're not going to light the spl (sound pressure level) world alight so I'm guessing it's mostly for your own listening pleasure.

Sealed is easy, ported 'sounds' louder but you need to get the port right or it gets fuzzy. It's not rocket science and there's even calculators online to tell you how big to make it.

[Ruckus]

Sealed all the way.

Ported tunes (boosts) a speakers/enclosure to a targeted frequency but this will be at the expense at the rest of the frequency range.

Most of the off the shelf ported enclosures are tuned for volume at around 40 to 50hz.
This gives you a loud 'one note wonder' but not nice SQ.

You can build enclosures to boost at the hard to reach low frequencies (30hz and lower), this can help SQ (linearity of output). But is hard to do and easy to get wrong.

Go Sealed. Smaller boxes easy to build.

[megamini_jb]

Sealed it is

Just looking on ebay and why do loads of people have a sub that's like twice as powerful as the amp. The other way round and you'd blow the sub, so surely having a powerful sub at like 1200w and the amp not even half that would sound ****

Edit: Oh, 1200w would be the subs maximum....

Edited by megamini_jb, 01 October 2012 - 09:00 PM.

[Skortchio]

Would these be subs that are being listed as "MAX POWER 1000w MEGA AWESOME BASS SOUNDS" and infact would probably go pop at a sniff of 300w

General marketting hype is to list the max power because people like big numbers.

[megamini_jb]

Would these be subs that are being listed as "MAX POWER 1000w MEGA AWESOME BASS SOUNDS" and infact would probably go pop at a sniff of 300w

General marketting hype is to list the max power because people like big numbers.

Yeah they are probably the boy racers selling their saxo's sound system and obviously the higher the watts to them iz lyk propa sick 4 tunez blud.

This made me laugh. Looks so stupid!
http://www.ebay.co.uk/itm/1000watt-Sound-System-Sub-6x9s-tweeters-And-Amp-/221130915549?pt=UK_Sound_Vision_Other&hash=item337c6dfedd#ht_500wt_1195

[Skortchio]

That right there, is staging at it's best!

I bet his boot catch really enjoys it.

*Edit* That "1000w" amp is actually 95w per channel, with a claimed bridge of 400w. I'd guestimate you'd be lucky to see 300w and then it would pretty rough.

Edited by Skortchio, 01 October 2012 - 09:18 PM.

[conlad]

That sub isnt 2ohm...

Its dual coil which means when wired in series its 4ohm and in parallel its 1ohm..

Take a look

http://mediacdn.shop....pdf?1317790168

I found this when looking at their 10'' series

[Skortchio]

Wire in parallel