I'm limited by cost and availability of good drivers... and I was wondering which would be a better buy...
I'm planning on building my first set of front speakers. and was wondering which would be a better alternative:
1. 2 4" speakers and a tweeter or
2. 1 5" speaker and a tweeter.
I still have plans on constructing a subwoofer.
I'm planning on building my first set of front speakers. and was wondering which would be a better alternative:
1. 2 4" speakers and a tweeter or
2. 1 5" speaker and a tweeter.
I still have plans on constructing a subwoofer.
It really depends on the drivers and the two XO point/slopes you want to use. What are you considering?
GM
GM
I'm planning on two tang band w4-654s and a tang band tweeter as for the alternative 5" I still have no idea.
I can't find any info on the W4-654, only the W4-657, so still can't comment. TB has some 5". All else being equal I would go with a single 5", but not knowing anything about what's available......
GM
GM
all things remaining the same the 5" should give you better (lower and more) bass. the 2x4" should give you higer sens (think 2.5way).
OK, I had looked there, but didn't think to look under tweeters for FR drivers. Anyway, with just published specs, two of these are limited to ~30W total with a ~103dB dynamic range/m capability without exceeding Xmax.
Vertically aligned and butted together with a TB 28-847S tweeter mounted up against them in the middle (mirror image baffles) and XO'd at 13560/4" = ~3390Hz max/2nd order loaded into ML-TLs should get you modest, but solid, performance to ~50Hz.
With a 2.83V sens = ~93.2dB/m mated to the tweeter's 90dB/m, hopefully no HF shelving will be required, though some baffle step correction will probably be required on the 4".
If you decide to use these and they won't be up against a wall, I recommend using a bipolar layout instead since this will allow a 4kHz XO point, or just capping it off way up high for a little top end 'air'.
GM
Vertically aligned and butted together with a TB 28-847S tweeter mounted up against them in the middle (mirror image baffles) and XO'd at 13560/4" = ~3390Hz max/2nd order loaded into ML-TLs should get you modest, but solid, performance to ~50Hz.
With a 2.83V sens = ~93.2dB/m mated to the tweeter's 90dB/m, hopefully no HF shelving will be required, though some baffle step correction will probably be required on the 4".
If you decide to use these and they won't be up against a wall, I recommend using a bipolar layout instead since this will allow a 4kHz XO point, or just capping it off way up high for a little top end 'air'.
GM
ok I have some terms that I need clarification:
1. what is ML-TL? is it a transmission line design? if so, how does it look?
2.HF shelving = High Frequency shelving? what does that mean?
3.What does a bipolar layout look like? how is it wired?
sorry for all the questions... can't seem to see the definition of the abovementioned terms during my search
1. what is ML-TL? is it a transmission line design? if so, how does it look?
2.HF shelving = High Frequency shelving? what does that mean?
3.What does a bipolar layout look like? how is it wired?
sorry for all the questions... can't seem to see the definition of the abovementioned terms during my search
No need to apologize for asking, it's how we learn, and that's what the forum's all about.
1) Mass loaded transmission line, i.e. TL (pipe) with a vent. It can look like a tower design, or tapered. The one I simmed using the TBs is a simple straight pipe.
2) It means the HF output is lower than some portion of the TB's bandwith (BW) to compensate for baffle step losses so that the speaker will sound tonally balanced. Many consumer speakers come with an adjustable one.
3) Bipolar (bipole) has the LF drivers (or TB's in this case) on the front and back and are normally wired in parallel, just like the MTM or TMM.
GM
1) Mass loaded transmission line, i.e. TL (pipe) with a vent. It can look like a tower design, or tapered. The one I simmed using the TBs is a simple straight pipe.
2) It means the HF output is lower than some portion of the TB's bandwith (BW) to compensate for baffle step losses so that the speaker will sound tonally balanced. Many consumer speakers come with an adjustable one.
3) Bipolar (bipole) has the LF drivers (or TB's in this case) on the front and back and are normally wired in parallel, just like the MTM or TMM.
GM
GM said:
Here's a graphic example (this one -- the TLb -- has a tweeter on the back as well).
An externally hosted image should be here but it was not working when we last tested it.
dave
Would this eliminate a BDSC network? If so, all getafix would need is a simple crossover at ~4KHz?
Timn8ter said:
yes
If you choose your drivers well, a simple cap or a parallel or series 1st order. Moving to a bipole also gives the freedom to cross to the tweeter higher.
dave
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