Driver options in 3 way system

jimbones

Member
2004-11-08 5:18 pm
ny
Current system is a hybrid OB.
Dayton RS270 in a sealed 2 cu ft cabinet with OB top with a PeerlessHD 830833 (6 in mid) and SB29 tweeter. XO at 275 and 2500 2nd order.

What driver is the "weakest link" and would changing it out (and of course there is xo rework) significantly improve it's performance? Thanks.
 
Current system is a hybrid OB.
Dayton RS270 in a sealed 2 cu ft cabinet with OB top with a PeerlessHD 830833 (6 in mid) and SB29 tweeter. XO at 275 and 2500 2nd order.

What driver is the "weakest link" and would changing it out (and of course there is xo rework) significantly improve it's performance? Thanks.

If you are looking for something to experiment with, you should probably at least consider an active crossover using something like a MiniDSP. It makes it VASTLY simpler and easier to experiment and tweek things. You can always construct an analogue crossover based on what you determine works best with the active crossover.

You'll also want to invest in some measuring equipment, otherwise you'll pretty much just be guessing as to how things are working.

Do you have a budget for this?

I believe these are all fairly decent drivers, but speakers are a prime example of the "last 10% improvement in performance requires a 900% increase in price". So an incrementally better set of drivers might cost you 10x as much money. $300 tweeters are maybe 50% better than a $30.

Higher prices for tweeters and midranges tends to get you either better crossover points higher or lower, flatter response and possibly greater efficiency.

You might want to consider perhaps a different type of tweeter, like a Fountek ribbon. They're moderately priced, perform very well and may make for a different sound at least.

I suspect that the bass driver is probably the simplest to swap out and easiest to improve. Some software like WinISD is very, very useful for looking at something like this and seeing what might work better given your box size/porting.
 
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jimbones

Member
2004-11-08 5:18 pm
ny
I do have measuring equipment (OmniMic) I didn't consider minidsp because my system is very hi grade electronics and I am not confident the active crossover will sound good. I inserted a simple RCA HiPass RC filter and added audible grunge.

In terms of drivers i agree they can get very expensive. I believe my current design represents good value. I believe the mid is the best part of the system. I was considering a dipole tweeter such as a Neo3. (would love an AMT but really expensive :eek:)

As far as woofers Not sure what I would use but I don't think I need to spend $400 on a driver. I think there were some decent Peerless or Seas for about $200 ea. Thank you for your advice.
 
I do have measuring equipment (OmniMic) I didn't consider minidsp because my system is very hi grade electronics and I am not confident the active crossover will sound good. I inserted a simple RCA HiPass RC filter and added audible grunge.

Having a problem with something like a RCA high pass filter sounds like you have some other issue or possibly a defective one.

However, even if your equipment is sensitive enough that it would cause issues, something like a MiniDSP is still VASTLY better for experimentation. You can make crossover changes in real time and on the fly. So you can see what would give you the best results and then use that as the basis for building an analogue crossover.

The base model MiniDSP 2x4 does have a low enough S/N ratio (98db?) that with a very high efficiency set up there can be issues, but the more expensive 4x10 model has IIRC a S/N of 114. So it shouldn't be an issue.

In terms of drivers i agree they can get very expensive. I believe my current design represents good value. I believe the mid is the best part of the system. I was considering a dipole tweeter such as a Neo3. (would love an AMT but really expensive :eek:)

As far as woofers Not sure what I would use but I don't think I need to spend $400 on a driver. I think there were some decent Peerless or Seas for about $200 ea. Thank you for your advice.

Well this is why I asked what were your goals and what it was you wanted to try and improve. "Better" is a rather nebulous target and just dropping in a new driver is not necessarily going to improve things.

Speaker design is a series of trade offs. A well designed speaker makes use of that to leverage the strengths of the drivers and minimize the weaknesses. So a "better" driver with a different set of trade offs, won't necessarily be better in that system, given what limitations and advantages the system is designed around.
 
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jimbones

Member
2004-11-08 5:18 pm
ny
If they aren't too expensive i should buy it and even if I don't keep in in the circuit I could use it as a design tool. I know nothing about them but I assume you can select XO frequency/slope etc. I would need a 2 channel, 3 way. Just cusious what they would cost.
 
If they aren't too expensive i should buy it and even if I don't keep in in the circuit I could use it as a design tool. I know nothing about them but I assume you can select XO frequency/slope etc. I would need a 2 channel, 3 way. Just cusious what they would cost.

Yes, they will do all of the standard crossover functions.

The 2x4 (two input, four output) is quite inexpensive $125, but basically you are going to need one per speaker, unless you had just a two way. One would be sufficient if you were just testing a single speaker though.

miniDSP 2x4 | miniDSP

MiniDSP 2x4 RevB | miniDSP

The more capable 4x10 is twice the price of a pair of the 2x4's $500

miniDSP 4x10 Hd | miniDSP