Vehicle & Technical > Defender
Defender speakers
jjsaul:
i have a pair of 5inch mounted on the top of the B pillars in the headlining and another pair of 5inch mounted in the top of the box over our LPG tank (behind 2nd row seats)
Priglet:
Thanks for your help.
Think I'll probably put a couple in the headlining just behind my head and a couple right at the back.
Not knowing much about speakers what's the difference between three way and co-axial speakers (in language a simpleton can understand)?
clips:
three way are still single piece units but have woofer with tweeter and mid cones in them (so imagine an oval with two ping-pong balls in it)
the coaxial is essentually the same with a woofer and tweeter mounter in the middle (ie plate with ping pong ball in middle)
the componant type have fully seperate woofer (bass cone) and tweeter.
in theory tweeters deliver directional noise so vocals and highs, the bass delivers the deep notes which arn't directional, and if used in say home sterios often use the back wall and the distance the speeker is placed from the wall to effect the depth of the sound. in a car generally mount them in big boxes to increase the depth of bass.
well think that right :roll:
Matt_H:
ahh, this is my forte here!
right then, simply put,
co-axial speakers have 2 or more speakers that share the same centre, there is normally a shaft running through the middle of the bass speaker that the tweeter (or high frequency bit) mounts to. They are at best a compromise as part of the area of the bass speaker is lost to this shaft, hense it cant move as much air (important for bass)
three way speakers have three speakers (normally in a co-axial arrangement) one for the low frequencies , one for the mid and one for the super highs. They tend to be better quality than a 2-way speaker system however for the same price a 2-way will generally be better as the three ways are for show often.
Seperates - generally a seperate bass speaker and a seperate tweeter, the best of the bunch as nothing goes through the bass area and thus not reducing the overal area of the speaker cone.
Right then, despite popular belief the wattage of a speaker is not that important in the big scheme of finding something 'loud'. The most important factor after is something called sensitivity - imagine it as the drag factor of a car. It is emasured in W/dB/Metres, or in other words how loud it is if you stick 1 watt rms into the speaker and stand at 1 metre. My PA system is rated at 99dB/W/Metres, so at 1 watt of power the speakers will kick out 99dB, I believe that at 100dB it is the threshhold at which damage is done!
A cheap car speaker will typically rate at mid 80s, to get that kind of speaker to the same volume as my PA you would need to stick in around 100 watts RMS, even the best head units can't ge that high (all their figures are quoted in peak which is arond 4 times higher than RMS values)
Every 3dB is considered 'twice as loud'. To work out how much a watt makes you take the RMS value, take the 10th log and multiply by 10, so 100 watts is 20dB. Doubling the speakers doubles the volume (all other things being equal), so 1 speaker to 2 doubles, 2 to 4 doubles again, 4 to 8 doubles again and so on, so once you get apst 2 speakers its actually quite hard to get a big difference by increasing speakers (as well as power required to run them)
'm not about to give away all of my trade secrets, however if you want a custom install that will really surprise you and blow you away PM me and we'll see what I can do..
To give you an example I have done a custom isntal into a modern Morgan sports car where the only speakers people have managed to fit int he past are about 2" in size. I did a 6" speaker install into custom made speaker enclosures totally hidden away with tweeters dash mounted, no amps, just a reasonable blaupunkt head unit and people complain it's too loud when he pulls up to the place where he works! The whole lot starting from fresh would cost about £200. He could double the quality and power with a cheap amp as well, however that is yet to come!
Matthew
Priglet:
--- Quote from: "Matt_H" ---'m not about to give away all of my trade secrets, however if you want a custom install that will really surprise you and blow you away PM me and we'll see what I can do..
Matthew
--- End quote ---
Thanks for your input Matthew.
I like the idea of the system you put in the Morgan but am not really close enough to make a custom install practical :(
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