Specifications

the overlap helps with effectively implementing
the Beam Tone mode, using the larger piston
area of the 4.5" drivers in conjunction with the
little 1.25" drivers when, for instance, +5dB of
bass boost is dialed-in.
To finish up this curve, note that with all tone
controls set to flat the 1.25" drivers exhibit a
5.5dB average bump centered at 6100Hz. The
response does extend out fairly well to almost
15KHz but with the 6100Hz peak presence
these upper frequencies are more likely to be
obscured rather than heard if no attention is
paid to attenuating the treble response via the
internal treble Tone Control.
The final curve is a splice, at 1000Hz, of the
composite woofer and tweeter curves. In this
case the internal Tone Control was used to set
the tweeter level to - 3dB. This setting yielded
the best overall frequency response for the
YSP-1.
This type of smiley-curve response is most
comfortable to hear when listening non-critically
to music and will usually be perceived as more
From 200Hz and below you're seeing the
response of the 4.5" woofer, which, at this
measurement position, is about 12" away and
at a 45º angle from the microphone. Note that
the curve from 200Hz to 1000Hz is quite a bit
choppier than the close mic'ed curve of the
woofer only. This might indicate that the 1.25"
"steer-able" drivers are brought down and
overlap the woofer's frequency response in this
range.
Normally such a frequency overlap is a no-no
with hi-fidelity speakers made specifically for
music reproduction. But the guess here is that
Higher Frequencies: formed as more directional beams like a point sound source
Lower Frequencies: formed as more broader beams to get surround feelings
YSP-1’s Poler Pattern (in front of the sound beam)
YSP-1 Digital Sound
Projector Measurements
It was fairly easy to measure the YSP-1
outside in free air. For the 4.5" mid-woofer I did
a close mic'ed measurement while the YSP-1
was pointing straight up. This gives a reflection-
free curve with no curve-smoothing required.
With the software set at 80Hz for the crossover
the woofer curved out as seen below. Note how
sharp the digital filter cuts off the mid-woofer at
1000Hz!
Please don't get too excited by the 114.5dB
(average) SPL reading. This SPL is with the
microphone almost touching the woofer cone
so SPL readings are inaccurate. The woofer
itself appears quite linear, ±1.25dB. It is -3dB
at 68Hz which is very good performance for
such a small driver. When moving the internal
crossover up to 100Hz this 4.5" driver will stay
more linear at higher power levels than if the
crossover were kept at 80Hz. Listening tests
(below) confirm the validity of the 100Hz,
crossover-to-subwoofers choice.
The graph below indicates the left channel
frequency response for the system in Stereo
mode. As can be seen in the upper
microphone-speaker photo this measurement
was taken with the mic 8" above what was
assumed to be the left channel 1.25" speaker
cluster.
WWW.AUDIOHOLICS.COM 9
Item
Name
review