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Specifications:
●
Woofer: 12", Magnetically Shielded
● MFR: 18 Hz - 125 Hz ±1 dB in Maximum
Extension Mode, 22 Hz - 125 Hz ±1 dB in Maximum Output Mode
● Auto-On, Soft Clipping,
Subsonic
Filtering, and Variable Tuning Frequency
● Crossover Frequency: 30 Hz -90 Hz, 24 dB/Octave Low-Pass
● Input Impedance: 10 kOhm (line), 1 kOhm (speaker)
● Inputs: Stereo Line Level and Speaker Level
(Full-Range Signal)
● Outputs: Stereo Speaker Level
● Amplifier output: 250 W RMS
● Power requirements: 115/230 V AC, 350 W
● Size: 22" (D) x 20 (H) x 15" (W)
● Shipping Weight: 93 Pounds
● Finish: Rosewood Veneer with Glossy Black Top
● MSRP: $1,150 USA
Hsu Research
www.hsuresearch.com | |
Introduction
Dr. Poh Ser Hsu of Hsu Research has been in the business of making
subwoofers since 1991. Everybody who is in this audio/home-theater hobby
pretty much knows or at least has heard about Hsu subwoofers. They are known
to be one of the best bargains in the subwoofer world. Hsu Research gained
its reputation in the early days by its vintage cylindrical subwoofer
products. In fact, those were the only type of subwoofers that Hsu made
until about four years ago. While performance wise, cylindrical subwoofers
might have some advantages over the box-type ones, aesthetically, they are
not the easiest to accommodate. And that is not even considering the
spouse-acceptance-factor (SAF)! Therefore, it was only natural that Hsu expanded
its product lines to include the box-type subwoofers.
The first box-type subwoofer that Hsu made, the VTF-2, has gained many
accolades from reviewers and audio critics everywhere. Based on the VTF-2
success, Hsu created the VTF-3, which is also of box-type, but bigger and
capable of going deeper in the low frequency region than the VTF-2.
However, even though the VTF-2 and VTF-3 depart from the cylindrical
shape, in my opinion they won't increase the spouse-acceptance-factor by
much. They are still relatively plain-looking, as with previous Hsu
products. So even though they might not break a room décor, they would not
augment or improve it as well.
The VTF-3R subwoofer reviewed here marks Hsu significant departure from
the plain-looking mold. In fact, it's so significant that I bet you
wouldn't be able to guess it's a Hsu subwoofer have you not known it
before. Technically speaking, the VTF-3R is based on the VTF-3 with some
modifications; the most obvious one is the location of the driver (VTF-3R
has a downward-firing driver, while VTF-3 has a forward-firing driver).
However, aesthetically, the VTF-3R is many times more gorgeous than the
VTF-3. On the SAF, no doubt
that this subwoofer would score very high. It is the kind of product whose
presence could improve your room appearance.
Features
When you open the VTF-3R box, you immediately notice
something different than the customary packaging of subwoofers in this
price range. Instead of using a plastic bag to wrap the subwoofer, Hsu uses
white fabric cloth. Not only that fabric cloth is softer for the delicate
finish of the subwoofer, it also can function as a dust cover when you plan
on not using your subwoofer for a long time. I like this kind of
double-function packaging, and I'm happy that more and more manufacturers
do it in this fashion.
The VTF-3R subwoofer utilizes a 12" downward-firing driver powered by 250
W amplifier. It measures 22"x20x15" (DxHxW), so it is quite big, but not
so big such as to dominate a typical living room. On the
introduction page in the subwoofer manual, Hsu mentions that this
subwoofer can double-function as an end table. Apparently, Hsu has
designed the height of the VTF-3R carefully to match the average height of
this piece of furniture.
All
the controls of the VTF-3R subwoofer are located on the rear panel. This
subwoofer can accept low- as well as high-level inputs. Only high-level
outputs are provided. There are two knobs for volume and variable
crossover control and three small switches for phase polarity, bass
extension mode, and crossover bypass. The main rocker power switch is
located near the power cord terminal (power cord is detachable). The sub has an undefeatable auto-on circuit. On the rear panel, you will
also find a small LED status indicator: it is green when the subwoofer is
on, and red when the subwoofer is in standby-mode.
The VTF-3R utilizes
a bass-reflex design and has two ports on the back. A
unique feature of the VTF-3R (as well as other Hsu VTF series subwoofers)
is the capability to adjust its tuning frequency by plugging or unplugging
the right port (as you look from the back) of the subwoofer (the foam plug is
provided). You can choose between maximum bass extension and maximum
output mode with this adjustment. For maximum extension mode, the right
port should be plugged up and the bass extension switch should be flipped
to the 20 Hz position. For maximum output mode, both ports should be left
open, and the bass extension switch should be flipped to the 25 Hz
position. According to the manual, the maximum extension mode will
generate a flat response down to 20 Hz with useful output down to 16 Hz,
while the maximum output mode will generate a flat response down to 22 Hz
only, but with higher output in the 22 Hz - 40 Hz region. The manual further
suggests that if the program material played does not extend below 22 Hz,
using the maximum output mode will yield less distortion for the same
sound level and tax the system less.
The build quality as well as the finish of the VTF-3R subwoofer are first
rate. As I have alluded to in the introduction, this subwoofer is a thing of
beauty. I like everything about the look of this subwoofer: rosewood
finish all around the sides, high gloss black with rounded edges on top
and bottom, and golden-brass cone feet. Hsu really got it right with this
subwoofer in the appearance. While your taste might be different than
mine, you still would agree on one thing with me: the craftsmanship of
this subwoofer is excellent.
Performance
OK,
I have declared that the VTF-3R subwoofer is handsome, now how about its
performance? First, let me explain on how I evaluate this subwoofer.
Finding the right location for the subwoofer to get the best performance
in my room was relatively easy. I already had that spot, occupied by
my current subwoofer, the trusty but oldie KEF AV1. So I just moved the
KEF and put the VTF-3R in the same position, which is near one of the front corners
of my room (relatively large room: more than 400 square feet with several
openings to adjacent rooms). I made various small adjustments to its
location during the course of the evaluation to make sure I got the best
from it. I broke it in with various bass-heavy program materials for many
hours before starting my serious listening. Evaluation included
matching the subwoofer with various speakers, playing test tones, and, of
course, playing some program material. Most of the time, I let my
surround processor handle the crossover, although my trial with the
built-in subwoofer crossover indicated that I could achieve the same
result with it (a testament that the built-in crossover was as good).
My matching test showed that the VTF-3R can be matched seamlessly with
various types of speakers, either bookshelf (NHT M6, Rocket RS-250) or
floor-stander (Rocket RS-750). Once its crossover and volume level were
adjusted properly, I didn't notice any separation between the speakers and
subwoofer sound. The VTF-3R was equally adept whether it was used to
augment bass-shy speakers or just to fill-in the bottom octaves.
In terms of frequency response, I can safely say that the specifications
that Hsu published do not lie a bit. In my room with the maximum
extension mode, I got relatively flat response down to 20 Hz with still
plenty of energy down to 16 Hz (about 3 dB down). With the same volume
setting and in the maximum output mode, I got louder output with usable
response down to about 20 Hz (3 dB down). These responses are better than
most subwoofers in the same or higher price range than the VTF-3R. My KEF
AV1 for example, which retailed for $3,500 when it was new eight years
ago, can manage usable response down to 20 Hz (3 dB down) but not lower
than that.
The ability of the VTF-3R to play loud while still maintaining control was
also impressive. The VTF-3R is not THX-certified, but I think it could
easily pass the THX level test as it could play as loud if not louder than
my KEF AV1, which is a THX-certified subwoofer.
As impressive as its technical specifications are, what matters most is
still how the subwoofer performs with actual program material. I played
various music and movies during the evaluation, and I'm glad to report
that the VTF-3R passed the tests easily. If your taste
of music is into bass-heavy recordings, this subwoofer will let you enjoy
the
music more. Listen for example to "Saint-Saëns: Organ Symphony", the excerpt
of which is included in the Hsu test CD that comes with the VTF-3R. Dr.
Hsu noted that this recording has the cleanest and strongest 16 Hz that he
has ever encountered. Listen to it without the subwoofer first, and then
listen again with the VTF-3R. It was enlightening! The presence of sheer
energy at the very lowest frequencies really helped me sense the grande of the
music.
For speed and attack, I tested the Hsu with music containing heavy
kick-drum or acoustic string-bass, such as from Christian McBride's CD, "Number Two Express". Again the VTF-3R impressed me with its
excellent speed and believable attack. The bass produced always had clear
definition with enough punch and was never bloated.
For home-theater application, I never felt the VTF-3R was lacking in any
department. It was capable of delivering room-shaking bass when called
for, yet it was able to also deliver delicate bass on the movie
soundtracks with ease. In this application, I tried both the maximum
extension and the maximum output mode. I found that I could live with
either mode just fine. The maximum output mode might give me slightly
cleaner output at loud volume, but the difference in the maximum
extension mode was not easily noticeable with most program materials.
Throughout this evaluation, I used my KEF AV1 as a sparring partner for
the VTF-3R. How did the two compare? For home theater, they both perform
equally well, so no clear winner. For music, my expensive AV1 was
surpassed by the VTF-3R, even if it was not by a significant margin. In my
opinion, the VTF-3R was slightly more musical than the AV1. The AV1
sounded a tad slower and had less attack in comparison to the VTF-3R for
music applications. Also, the AV1 didn't have the frequency extension to
accommodate organ music that the VTF-3R did. Don't get me wrong, the AV1
is a good subwoofer by itself, but it was just designed more towards
home-theater than towards music. Well, you know what it means as a
result of this comparison, the AV1 may have to surrender its spot
permanently to the VTF-3R.
Conclusions
Hsu
has a winner in the VTF-3R. This subwoofer possesses a killer look and
downright impressive performance that belies its $1,150 price. If you've
been looking for a true subwoofer that could play down to 16 Hz with high
spouse-acceptance-factor and won't break your wallet, this is it. Kudos for
Hsu for making such a great value product that I'm sure will make many
audiophiles and home-theater enthusiasts happy! Very highly recommended!
Note: Dr. Hsu informed me that starting in January 2004, the VTF-3R will
be updated with a new and more powerful amplifier. Also, it will be
available in piano black finish. The new version will carry lower retail
price as well, $799 for the piano black finish and $899 for the rosewood
finish.
- Yongki Go -
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