The secret of building a good 2-way

[tinitus]

OK then, thats surely much better

[DcibeL]

Originally posted by planet10
In 40 years of building speakers the best 2-way i've done is Tysen... active XO (PLLXO @ 333Hz) SDX8 sealed, FF85KeN in midTL.

Hi Dave,
I am intrigued by your two way utilizing a widerange driver. I have always been interested to build a two way in this fashion, but when comparing the use of a widerange driver to a small 1" tweeter, I found that widerange drivers have rather poor off-axis response at high frequencies. I believe this is due to basically beaming due to the large cone. A regular tweeter does much better in this sense, so I am forced to choose between poor high frequency off-axis (and for many drivers on-axis as well) response, or a crossover in an area where hearing is most sensitive. Would you agree?

And no, I don't think crossovers are evil at all, just too many speakers with non-optimal designs (read: poorly designed).

[planet10]

Originally posted by DcibeL
but when comparing the use of a widerange driver to a small 1" tweeter, I found that widerange drivers have rather poor off-axis response at high frequencies.

I often think of the FF85 as a 1" dome with a really big surround... on this one the dustcap is attached directly to the end of the voice coil.

dave

[Salas]

But the purity and treble of EJ Jordan JXR6HD is tops....At a price of course.

[d to the g]

Originally posted by planet10


In 40 years of building speakers the best 2-way i've done is Tysen... active XO (PLLXO @ 333Hz) SDX8 sealed, FF85KeN in midTL.

dave

I guess I'm not sure how a PLLXO (passive line level crossover) can be active.

[Salas]

Originally posted by roger_lew
Salas,

Your Seas/HDS 2 way looks intriguing. Where is that one documented?

Roger

Originally posted by Salas


Nowhere. I have the Leap crossover schematic data, I must measure the cabinet dimensions when I will visit my friend's place really soon and I will post here.

[454Casull]

Originally posted by d to the g


I guess I'm not sure how a PLLXO (passive line level crossover) can be active.

Perhaps it stands for phase locked loop... maybe.

[Salas]

Woofer = SEAS CA22RNY
Tweeter = Peerless HDS

L1 = 2.5mH (2mm d. wire)
L2 = 0.25mH (1mm d. wire)
L3 = 1mH (1mm d. wire)
C1= 4u7//0.68u PP high quality
C2 =10u//2u2 PP high quality
C3 =33u NP//0.22u PP high quality
R1 = 3R9 10W Mills
R3 = 15R 10W Cement

No polarity inversion nowhere. All inductors air core.

[Salas]

The woofer.

[Salas]

The tweeter.