|"If I werent
currently looking for a home in one of the most overpriced housing markets in the US,
Id be writing a check for the L-509u. Today."
Luxman L-509u Integrated Amplifier
by Uday Reddy
a lot to be said for longevity in the business world. It speaks of a commitment to core
principles and a focus on quality, with the needs of the consumer kept firmly in sight.
When considering the past 20 or so years in the world of high-end audio, quite a few
companies have withstood the test of time. However, thinking beyond that time period, the
names get fewer: brands such as McIntosh, Audio Research and Klipsch. To those venerable
names add Luxman, which has been around for more than 80 years. Few companies of any
type have had that kind of staying power. Those that do usually know their target audience
well and consistently produce top-flight products. Known mostly for its excellent-sounding
tube gear, Luxman also produces well-regarded solid-state electronics. Absent from North
America for a number of years following a near-disastrous merger with Alpine Electronics,
Luxman is now back on American shores with a full product line of sources, preamps and
|"The L-509u was one
dead-quiet integrated amp with an ultra-low noise floor, resulting in the blackest of
backgrounds from which the music would emerge in solid, focused, three-dimensional images.
Additionally, the L-509u was tonally neutral, and did not favor one end of the frequency
spectrum over another; instead its sonic signature was geared toward delivering the
least-colored, most musically natural performance, regardless of the type of music."
"What impressed me most, however, was the L-509us control of the bass."
"Subterranean? Without a doubt."
|"Power output is
120 watts into 8 ohms, reportedly doubling to 240 watts into a 4-ohm load.... Frequency
response is 20Hz-20kHz for phono (yes, the L-509u has a phono stage, which I wasn't able to
test) and 20Hz-100kHz for line-level sources." "One feature of the L-509u is the
high-quality electronic input selector switch, taken from Luxmans top-of-the-line
C-1000f preamplifier. This results in minimal sound-quality deterioration while increasing
channel separation and crosstalk. The L-509u also employs the solid-brass volume control used
in the CL-88 vacuum-tube preamplifier."
offers remote controls for other products, no remote is supplied for the L-509u, owing to
Luxmans insistence on a design with no sonic compromise."
|"The L-509u's true
competition is the even more expensive Esoteric A-100 and other cost-no-object integrated
amps. Its just that good."
To that mix, Luxman has added the L-509u
solid-state integrated amplifier ($10,000 USD). The L-509u is Luxmans answer to the
compromise-is-not-an-option approach to the integrated amplifier, with careful attention
paid to all components that would have an effect on sound quality. Made with premium parts
to the exacting standards seen in Luxmans entire product line, the L-509u fairly
bristles with intelligent details and incorporates some of the best features found in
Luxmans preamps and amps.
One feature of the L-509u is the high-quality
electronic input selector switch, taken from Luxmans top-of-the-line C-1000f
preamplifier. This results in minimal sound-quality deterioration while increasing channel
separation and crosstalk. The L-509u also employs the solid-brass volume control used in
the CL-88 vacuum-tube preamplifier. Additionally, noise and distortion have been kept to a
minimum with the introduction of Luxmans Only Distortion Negative Feedback (ODNF)
version 2.2. ODNF is a circuit that separates and cancels distorted elements, thereby
reducing noise and distortion, again resulting in purer sound.
Very handsome in a retro style reminiscent of
integrated amps from the '60s and '70s, the L-509u's front panel is dominated by two large
VU meters, backlit in baby blue. The front, top, bottom and side panels are made of
machined, brushed aluminum, and the top panel is flanked on both sides by black-colored
cooling vents. The L-509u measures 18 3/8"W x 7"H x 17"D and weighs 63
pounds. Power output is 120 watts into 8 ohms, reportedly doubling to 240 watts into a
4-ohm load. Total harmonic distortion is rated at a very low 0.003%. Frequency
response is 20Hz-20kHz for phono (yes, the L-509u has a phono stage, which I wasn't able
to test) and 20Hz-100kHz for line-level sources.
The front panel has two large knobs on either
side of the VU meters. The right knob adjusts the volume, while the left knob selects
among four RCA inputs, two balanced line-level inputs and the phono input, which
accommodates moving-magnet or moving-coil cartridges. Adjacent to the input selector are
two small buttons; the upper button is for the tape loop, and the lower button selects the
moving-coil stage for the phono input. From left to right, in a row along the lower
section of the front panel, are the power button, a headphone jack, the record-output
selector and a speaker switch for muting (especially helpful when swapping interconnects
and cables) or switching between primary and secondary speakers.
Continuing further, theres a switch for
selecting stereo or mono, and adjustments for bass, treble and balance. The L-509u is
unusual in offering tone controls. These used to be standard on preamps and integrated
amps, but lately have been left off many leading designs. Poorly designed tone controls
may have gotten a bad rap, but, properly implemented, they can be quite helpful in taming
edgy treble or muddy bass on poorly engineered recordings.
Also on the front panel are three small buttons
in a row below the volume control. The first button, Line Straight, is for those who are
not interested in the tone controls, allowing their removal from the signal path. The
second button, Separate, splits the preamp from the amp, allowing the addition of a
room-correction device or a CD player with a digital volume control. The final button
switches off the meters' lighting.
The rear panel has a signal ground and an RCA
input for a turntable. There are four more RCA inputs for various line-level sources along
with two more RCA sets of jacks for the tape monitor. Below the RCA jacks are two sets of
balanced inputs, both of which come with an ingenious feature. As there are regional
differences throughout the world as to pin configuration for both sources and
amplification, there is a button between each set of inputs that allows you to invert
phase. The speaker binding posts are much like the binding posts that I encountered with
the Esoteric A-100 integrated amp, which I reviewed last year. There are two pairs of
vertically arrayed, gold-plated, plastic-shrouded posts that accept bare wire, spade lugs
and banana plugs. These grasped the spades of my speaker cables tightly and can be
manually tightened, no post wrench needed. Rounding out the rear panel is an AC socket for
the detachable power cord and the line-phase sensor in the upper right corner. This last
feature is clever. Press the button when first setting up the L-509u and the unit will
check the phase of the electricity it is receiving. If the AC outlet is wired incorrectly,
meaning the live and neutral wires are swapped, a red LED will warn you.
Although Luxman offers remote controls for other
products, no remote is supplied for the L-509u, owing to Luxmans insistence on a
design with no sonic compromise. For me, this was rarely an issue, as I would adjust the
volume control at the beginning of an album and leave it at that setting. In fact, the
only time that this was even an issue was when listening to the eclectic compilation CDs
provided by Luxmans importer, Philip OHanlon of On a Higher Note. Because the
tracks were from different artists and albums, recorded at different levels, I had to
compensate with some tracks and adjust the volume. No big deal.
The unit that had been sent to me by
OHanlon had significant use prior to my evaluation; therefore, no burn-in was
required and it performed flawlessly with no hiccups. Most of my evaluation was done using
the L-509u with the tone controls defeated. I did also, on occasion, take advantage of the
line-in option to drive the amplifier section using my Wadia 830 CD players digital
volume control (and remote control!). Although the unit never got more than warm, even
with extended use at high SPLs, I would still recommend having sufficient airspace over
the top to provide adequate ventilation.
Like the Esoteric A-100 I reviewed, the L-509u
was one dead-quiet integrated amp with an ultra-low noise floor, resulting in the blackest
of backgrounds from which the music would emerge in solid, focused, three-dimensional
images. Additionally, the L-509u was tonally neutral, and did not favor one end of the
frequency spectrum over another; instead its sonic signature was geared toward delivering
the least-colored, most musically natural performance, regardless of the type of music.
Although a class-AB integrated amp, the L-509u likely runs in class A more than most
integrateds at similar power outputs and volumes, resulting in this natural,
distortion-free quality. The music was so natural-sounding and involving that I found
myself listening more to the music than to the usual recorded artifacts that I often pay
attention to when evaluating a component. Its ability to make me forget about what I was
doing and just enjoy the music did wonders for increasing sheer musical pleasure, but at
the expense of interfering with my ability to focus on and get down to the job at hand:
reviewing the thing!
Loudspeakers Wilson Audio Sophia.
Integrated amplifier Jeff
Rowland Design Concentra.
Digital Wadia 830 CD player,
Logitech Transporter wireless DAC, Apple MacBook with 1TB Apple Time Capsule.
Audio Ultra MusicLink.
Speaker cables Transparent
Audio Ultra MusicLink.
Headphones and Headphone amplifier
Sennheiser HD 600 headphones, Ultimate Ears UE 11 Pro in-ear monitors, Ray Samuels
Audio Emmeline, The Predator headphone amp.
Accessories Audio Power
Industries Power Pack II.
Dynamically, the L-509u was a solid performer,
capable of wide swings in volume with no compression or congestion at louder volumes. A
favorite classical recording of mine is of Seiji Ozawa conducting the Boston Symphony
Orchestras performance of Stravinskys Petrouchka (BMG Classics
09026-63311-2). This rhythmic, fanfare-like composition is a great workout for integrated
amps and can lack coherence when rendered through lesser components. The L-509u handled
this composition with aplomb and without any sense of strain, and the transient response,
particularly with strings and brass, was fast. With regard to soundstaging, most
amplifiers perform best at realistic volumes, with the soundfield collapsing at lower
volumes. However, the L-509u delivered soundstaging that was stable, broad and deep, even
at low-level SPLs, and blossomed even further when the speakers were given more juice.
Very impressive was the reproduction of high
frequencies and the midrange. On "Azalea" from trumpeter Brian Lynchs
album 24/7 (Nigel Hayer 2055), Lynch solos on his trumpet with the band playing
softly behind him, and little details, such as the crisp high hat or the faint brushes on
the snare heard in the background, sounded light and delicate, while still remaining
detailed. Lynchs playing in the upper register was smooth, airy, and graceful,
floating front and center, with no evidence of hardness or edge. The low noise floor of
the L-509u again contributed to unveiling this low-level detail.
What impressed me most, however, was the
L-509us control of the bass. Too often, excellent bass reproduction is attributed
solely to the loudspeaker, but the partnering amplifier can have a significant
contribution to the bass through its damping factor (in technical terms, the ratio of the
impedance of the source to that of the loudspeaker), thereby reducing undesirable movement
of the woofer near its resonant frequency. This integrated amp exerts such muscular
control over the woofer that the lower frequencies, particularly the deepest octaves, were
rendered with power and control. Being nearly full range, my Wilson Audio Sophia speakers
have ample bass output, and I was quite confident that over the past four years of
ownership, I had experienced their full capabilities. However, listening to "Dead
Already" from the American Beauty soundtrack (DreamWorks 450233) was a
revelation. This track starts off with what sounds to my ears like a marimba, with more
percussion and guitar added as the track progresses. Suddenly, both bass drums and
gut-wrenching bass guitar or synthesizer kick in forcefully, with impact that I
wasnt prepared for. Although the lowest frequencies rolled off slightly, the depth
of bass achieved was startling, with substantial weight and a sustained, room-filling
pulse of a quality that I had never heard before with these speakers. Subterranean?
Without a doubt. This characteristic was intoxicating and addictive.
After hearing this incredible bass response, I
dove deep into my collection of rock recordings to exploit and enjoy this quality. The
Rolling Stones, the Who, Led Zeppelin? Check. The Grateful Dead, the Allman Brothers Band,
Little Feat? Double check. The bass flat out rocked, and I just couldnt get
enough. Even so, it wasnt just deep bass that impressed but also the ability to
follow individual bass lines. On "Cause Weve Ended As Lovers" from Jeff
Becks Live At Ronnie Scotts (Eagle Records ER 20150-2), young
bass phenom Tal Wilkenfeld plays sensitively behind Beck as he solos in the beginning of
the piece, yet each note can be heard distinctly. As the piece progresses and segues into
Wilkenfelds solo, her bass comes to the forefront, every pluck and inflection
conveyed perfectly. On more up-tempo cuts, like "Becks Bolero" and
"Led Boots," Wilkenfelds bass lines merge more with the rhythm section but
continue to provide a solid foundation to the bottom end.
I dont spin vinyl, so I didnt have a
chance to evaluate the phono section and cant comment on its performance. I did,
however, spend time listening to headphones via the L-509u's headphone output. This is no
thrown-in feature. The L-509u was able to drive both my Sennheiser HD 600 headphones and
Ultimate Ears UE 11 Pro in-ear monitors effortlessly, coming in handy for early-morning
and late-night listening sessions while my family was sleeping. This feature is
significant. It eliminates the need for a dedicated headphone amp.
The most striking difference between the L-509u
and my Jeff Rowland Concentra ($5600 when still available) was with the bass reproduction.
Tonally, they are quite similar -- uncolored and musically natural -- but with regard to
the control of the woofer and the ultimate low-frequency extension, the Concentra was no
match. My current room is compromised in the bass department because of it small volume,
so I still experience some bass overhang with the Concentra, especially at louder volumes.
The extraordinary control of the L-509u made it seem as if I had a subwoofer in my system,
and yet the problems with overhang were largely eliminated. The treble and midrange were
very comparable between the two integrateds. However, the lower noise floor of the L-509u
allowed more detail to emerge within these frequency ranges, particularly in quiet
interludes that otherwise would have been somewhat veiled with the Concentra. Dynamically,
the L-509u brings more power to the table, enabling it to offer much better transient
response thats especially noticeable with symphonic music.
The L-509u's true competition is the even more
expensive Esoteric A-100 and other cost-no-object integrated amps. Its just that
The Luxman L-509u is a versatile, full-featured
integrated amplifier, complete with a MM/MC phono section and a headphone output, and it
offers sonic performance that easily outclasses my current reference. It may cost almost
twice as much, but, to me, its features and performance easily justify the added expense.
If I werent currently looking for a home in
one of the most overpriced housing markets in the US, Id be writing a check for the
|Luxman L-509u Integrated Amplifier
Price: $10,000 USD per pair.
Warranty: Five years parts and labor.
1-3-1 Shin-Yokohama Kouhoku-ku
North American distributor:
Luxman America Inc.
27 Kent Street, Suite 122
Ballston Spa, NY
Phone: (518) 261-6464