would it be possible to run a set of 6.5" splits and 4" top of the dash speakers in parallel of a single 2ch amp? what would it sound like? its just a question, not necessarily something im planning on doing..

Yes it is possible if your amp can handle the 2 ohm load, but you will notice a decrease in sound quality.

how bad can it get? the amp can handle 2 ohm.. but is powering a set of 6" drivers and 4" drivers without a filter wise? unless of course im running both sets of speakers with similar RMS value. also.. i want to sound deaden the front doors, what can i use to seal the service holes? or would you just paste sound deadening straight over them?

At low volume you wouldn't notice really, but at higher volume you would.
Doesn't matter what speakers you use (brand/wrms whatever), the amp will output half to one speaker and half to the other. Some amps get a power boost running at 2 ohm, but you usually lose clarity.

If you want both speakers to output the same music, then no filter is required on a per speaker basis, obviously you'd probably run both at HPF, but this would be controlled at the amp.

k thanks for the info Leigh :)

I would just stick with the 6.5". Less speakers to worry about. :D :D

i take you have been reading my thread?
(im the only person i know who says stage)

Its posible to do what you want, if you can build a custom crossover to get the right freqs to the right bits. its no use having every thing make the same noises.
a normal crossover for splits will not send enough mid to the 4" for any effect.

hertz make a three way split with 6.5" 4" and tweeters, maybe have a look at them well worth the money if you ask me

i take you have been reading my thread?
(im the only person i know who says stage)

Its posible to do what you want, if you can build a custom crossover to get the right freqs to the right bits. its no use having every thing make the same noises.
a normal crossover for splits will not send enough mid to the 4" for any effect.

thanks dude, thats what i was looking for.. and no, i havent really been reading your thread :P why would i do such a thing? hehe

lol @ science, half the people here refer to staging nowadays...

When you say 6.5" splits are you referring to the midbass driver only or a 6.5" midbass driver, crossover and tweeter combo?

(AND a 4" coaxial dash speaker on top of that?)

Generally I find coaxials are pretty cheap and nasty... They usually have a cheapo 6db crossover on them wrapped underneath the tweet. Some exceptions... But usually nothing over a dedicated tweet with a proper external crossover. (or an active job)

You wont have any problems running these at two ohms but...
At two ohms the amp will not sound as good (cone control is reduced) although probably unnoticeable.

unless you have crossovers set up to high pass the smaller mids they will be distorting below 120hz, whereas your larger mids can prob play down to around 70hz. In order to stop distortion you will have to high pass both speakers at around 120 ish hz

Through your primary 'imaging' range (~500 hz - ~4khz) you really dont want to have mulitple drivers blurring your image. Better to have one driver playing these, but you can afford to have multiple tweets with one set playing above 8khz high on the dash as this helps to raise the stage slightly.


Food for thought.:)

quick lesson on sound waves.

When two sound waves of the same frquency interact, the peaks and troughs double over and either make larger peaks and troughs on the sign wave thats if they are both the same distance from you ear, which increases the intensity of it (loudness) if they are off phase to each other (one slight further away than the other) then they can couter act each other and cancel each other out,

ultimatly you are best to have a single full range driver for correct sound staging but getting a speaker do 20-20,000hz is not possible and still be somewhat linear.

If you use a 4" and a 6.5" splits you should get a three way crossover so the drivers arn't playing the same frequencies and to cause these problems. If you just want loudness then who cares it doesn't matter but its going to sound seriously poor, the imagaing and sound stage will be blured, might not matter if your listening to some heave grundge screamo music, but listening to anything with clarity and proper studio live record will sound worse than just using a set of 2 way 6.5" splits

if you want to save money the best bang for buck i personally think is the jaycar two ways, they are 60watt rms at 4 ohms and don't sound half bad!

I have used dynaudio and morel 2 ways and i'v setteled on using peerless high end car audio 2 ways (80watt rms) 94db sensitivity

i take you have been reading my thread?
(im the only person i know who says stage)



could have fooled me :P lots of people on here call it a front stage :)

the front stage are the main speakers, so your splits/speakers in the front are called the front stage.

Im into stereo hifi so i dont even have rear speakers, it messes with the location of the front stage, it pulls it back and thats not where the music was recorded. speakers are just meant to replicate the recording and location of the instruments so if you put two speakers behind you it creates a non true production of the recording.
(not in a surround sound mode where recordings are designed for that, and you can only make use of that if you have a HU which can play dvd's and a decoder to truely replicate and produce a surround mode in which it was recorded)