XO2W24
The XO2W24 is a 2-way electronic crossover and the
only one in the market where the user can time-align
their dome tweeters with the woofer. No other crossovers
have this feature. The delays in all the other crossovers
are for the woofers, not the tweeters. Reason being
that they are manufactured for the pro market. In
that industry, the majority of loudspeakers are horn
loaded, meaning the compression driver is behind the
woofer.
Another
feature that's unique to the XO2W24 is the use of
a fixed crossover. AmpsLab adopted this method because
it's sonically superior to using a potentiometer to
adjust the crossover frequency. Simply decide on your
crossover frequency and solder in the components from
the values stated in the documentation.
The
XO2W24 features are:
Electronically
Balanced Input
Master
Gain Control
24dB/oct
Linkwitz-Riley High & Low Pass Networks
Delay
on High Pass for Time-Alignment
Volume
Control on High Pass for tweeter volume
The
plots below illustrate the XO2W24 in use. The crossover
frequency used is 2,400Hz mainly because most 1"
tweeters are quite comfortable at this frequency.
Loudspeaker
under test is the Soliloquy-IIb.
It is a compact 10L 2-way using a 5" Tang Band
W5-1685 UnderHung woofer with a Seas 27TBFC 1"
Aluminum Dome tweeter.
Fig 1 - W5-1685
Low Pass with Seas 27TBFC High Pass
The
Blue plot in Fig 1 is the Tang Band W5 with the Low
Pass filter. The Red plot is the Seas 27TBFC through
the High Pass Network. The two drivers are crossing
acoustically at about 2,400Hz.
Fig 2 - Null Response
The
Violet plot in Fig 2 is the null using the Delay in
the High Pass. The adjustment is quite fine so it's
not difficult to tune for a deep null.
Fig 3 - Time Aligned Soliloquy-IIb
Fig
3 is the Time-Aligned response of the Soliloquy-IIb.
The tweeter wires are actually now in reversed phase.
The
XO2W24 is one channel only, therefore two are needed
for stereo use. It requires a regulated power supply
for the op amp. Our PSU15REG
is specially designed for such purpose.
PCB
= 7-7/8" x 2-3/8" (200mm x 60mm)
Double Sided | FR4
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