Unisound DAC 1.5s MSRP $160/pr
The Unisound DAC 1.5 is the least expensive
speaker in the shootout. It is also one of the smallest, measuring 12-inches tall x 7.75-inches wide
x 9-inches deep. The speaker is a 2-way vented bass reflex design that incorporates a 1-inch dome
tweeter and a 5-inch poly woofer. The speaker has a claimed frequency response of 55Hz-20kHz.
Efficiency is rated at 88dB, making it the least efficient speaker in the group. The Unisound DAC 1.5
has a nominal impedance of 4 ohms; the only 4 ohm speaker in this shootout.
Maximum power handling is rated at 70 watts. The Unisound DAC 1.5 has a limited warranty of 5 years. The speaker is a basic rectangular shape that has slightly rounded front corners. Performing the knuckle rap test we found the speaker to be a little hollow sounding. The vinyl finish is nicely done and there are no obvious seams or distortions. The drivers are recessed into the cabinet and the grill is of high quality, held in place with plastic grommets. On the back of the speaker you will find plastic gold plated multi-way binding posts. The vent opening is located directly below and a keyhole mounting block directly above. The DAC 1.5 is only available in the black finish.
Removing the drivers, we find that the speaker is constructed
of ¾-inch MDF and the inside of the enclosure is lined with poly fill. There is no bracing in the
enclosure and this is the reason for the hollow sound when rapping on the side of the enclosure. The
wire from the crossover to the drivers is standard 22AWG. This is the smallest gauge wire used in the
shoot out. The vent port is constructed of thin wall plastic and incorporates a grate to prevent
blockage and alleviate port chuffing.
We believe that the DAC 1.5 has average build quality, fit, and finish. The use of 22 AWG wire and no internal bracing lowered its stature in the shootout. The tweeter used in the DAC 1.5 is fluid cooled and is a Dynaudio OEM version; naturally its build quality is very good. The 5-inch poly woofer is small and has a light duty motor structure and spider. The woofer is not magnetically shielded. The basket frame is made of medium gauge stamped steel and we heard a little ringing when tapping on the side of the basket.
For a more complete review of these speakers, see Mi Horn VHT Speaker Review
Build Quality Wrap
Up
Concluding the build quality portion of the shootout, it is obvious from the photos and descriptions that we believe the Klipsch eeked out top honors. The Axiom was a very close second place, being the nicest looking speaker in the shootout; however, its grill construction kept it from grabbing top honors. The Unisound DAC 1.5 had average build quality, the use of 22 AWG wire and no internal shelf bracing contributed to a hollow sounding enclosure. This all prevented it from doing better. The BIC DV-62 had disappointing build quality. Drivers were flush mounted, low quality binding posts, no internal bracing, less than adequate poly fill, and visible seams in the finish contributed to its last place finish.

Set up
Setting up the speakers for the shootout, we used the Yamaha RX-V4600 receiver , Sony 500 CD player, and Music Fidelity X-DAC. The speakers were connected to a passive speaker switcher. We calibrated each speaker with a test tone at 75dB and noted and recorded the volume indicator on the receiver. Each time a speaker was selected the volume was adjusted to its calibrated level. This allowed us to listen to the speakers at the exact same level as to not introduce any volume bias into the evaluation. This was necessary because of the speakers different efficiency ratings. All speakers were placed at a 28-inch height and all of the speakers were moved to different positions and toe in angles. The listening mode used was 2-channel pure direct.

Listening evaluation

For evaluation, we use the 24k Gold HDCD version of Patrica Barber Café Blue track #3 Too rich for my blood, #8 Ode to Billy Joe and #11 Nardis. We like using this CD for 2-channel evaluation. This CD has everything: powerful female vocals, huge dynamic instrumental solos, and super high impact percussion solos. The CD's recording is almost flawless; if you don't have this CD, get it now!
Track #3 Too Rich For My Blood
This track has it all: vocals, hard-hitting bass, and piano melody.
Axiom
M3Ti
Starting track #3, we found that the bass and
piano sounded very balanced. As the song progresses, Patricia starts to sing as if she was in an
empty nightclub after hours. The Axiom M3Ti reproduced this effect perfectly. Further along, Patricia
was holding very long high notes with the drums beating away in the background. The Axiom M3Ti did
not disappoint. The bass was smooth and controlled. Patricia's voice sounded absolutely
wonderful. The tweeter was a tad bit aggressive sounding when the Axiom was toed in toward the
listening position. We found that toeing in the Axiom to only about 5-8 degrees corrected this but it
did compromise the focus of the speaker, slightly. The Axiom was the most refined sounding speaker
with this track in the shoot out. The Axiom M3Ti is well suited for average-medium room
sizes.
BIC DV-62
Again, starting with track #3 we found that the
BIC had huge amounts of bass and the piano sounded natural. But the bass sounded uncontrolled at
times. During the first segment of the track as Patricia started to sing, the BIC's sounded big
and bold. As she began holding the high notes for extended periods of time the speaker sounded a
little shouty and sibilant. The BIC DV-62 sounded very dynamic with this track and there was a lot to
like with its presentation; but at times it sounded unbalanced.
The DV-62's had the lowest frequency cut off in the speaker shoot out. It played lower bass notes with authority. The DV-62 sounded best with aggressive toe in. Doing this, made the soundstage collapse a bit but the speaker sounded more controlled. The BIC DV-62 can be used in larger than normal rooms due to its high output capability.
Klipsch RB-15
Starting track #3, it was obvious that this
speaker had huge dynamic capabilities. The bass was tight and fast, although not as deep sounding as
the BIC or Axiom. The piano sounded smooth and natural. As Patricia began to sing, it sounded as if
you were in the front row of the nightclub. This speaker has a very aggressive, in your face
presentation. As Patricia began holding the long high notes, I did detect a little bit of harshness
in the midrange. The tweeter has a lot of sparkle, air, and pop. The Klipsch RB-15 has a huge
soundstage due to its wide dispersion, Tractrix horn.
This speaker did not sound as refined as the Axiom, with this track; but man the huge dynamic swings were an addicting fun experience. The Klipsch speakers are not placement sensitive, put them most anywhere in the room and they will perform well. The Klipsch RB-15 can be used in most room sizes due to its high dynamic capability.
Unisound DAC
1.5
Starting track #3, it was obvious that this
speaker didn't have the dynamic capabilities of the other speakers in the shootout. The speaker
sounded smooth with the piano, but when the drum began the speaker sounded a little compressed and
strained. As Patricia began the long holding notes segment, the little Unisound began to shine. This
speaker was a lot more laid back than the rest of the bunch. One big surprise was the tweeter. Wow,
did it sound smooth and natural, every little nuance in the upper frequencies sounded airy and
wonderful. What this little speaker lacked in dynamic capability, it sure made up for in the midrange
and upper frequencies. The soundstage with the DAC 1.5 was a little shallow and if pushed hard it
sounded a little strained. The Unisound DAC 1.5 is placement sensitive and listening positions should
be limited to about 10 feet from the speakers with no more than 10 feet apart and slight toe in. The
Unisound should be used in small to medium sized rooms.