Product Review - Manley Labs
Stingray Integrated Tube Amplifier - December, 1999
Paul Knutson
Manley
Stingray Integrated tube amplifier 4 x Stereo Line-Level RCA Inputs Passive Noble Volume and Balance Controls All-Vacuum-Tube Low-feedback Design 8 x EL84 Output Tubes 2 x 6414 Driver Tubes 2 x 12AT7WA Input Tubes Output Power: 50 Watts X 2ch. (1.5% THD @ 1kHz) MFR: -1dB: 15 Hz - 40 kHz Gain: 37 dB at max Volume Input Sensitivity: 185 mV in = 50 watts out S/N Ratio: typically 87 dB A WGT 20Hz-20KHz Input Impedance: 50 Kohm nominal Load Impedance: Optimized for 5 ohms Power Consumption: 200W (idle); 370W (full power) Size: 5 1/2" H x 19" W x 14" D Shipping Weight: 30 Pounds MSRP: $2,250
(USA)
|
Manley Laboratories, Inc., 13880 Magnolia Avenue, Chino, California 91710; Phone 909-627-4256; Fax 919-6282482; Web http://www.manleylabs.com; E-Mail [email protected] |
Introduction
Some of the finest integrated amplifiers of all-time use the same output tube as the new Manley Stingray � the EL-84. I refer affectionately to this dandy little tube as �my favorite pentode�. Sure, there�s much more that goes into a good amplifier design than the selection of the output tube, but in my book, going with the EL-84 as your starting point gets you at least half way there to real music. Classic components from the 1950�s, such as the Dynaco SCA-35 and Eico HF-81, among others, put the EL-84 to great use in simple, musical circuits. I know many music lovers who still use one of these old integrated tube amplifiers as their primary music-maker. Not a bad choice, really, but also not quite up to the standards that we hold equipment to today.
To elaborate, the classic integrated amps mentioned above have fairly modest resolution and dynamics, flabby bass, and minimal extension and clarity in the highs. Again, they are good music makers, but they aren�t necessarily true to the signals that they are being fed. You can rather easily modify these pieces to improve some aspects of their performance, but not everyone wants to go there . . . in fact, most don�t.
Make no mistake that the shortcomings of the classic integrated tube amps of the 50�s were not the fault of the EL-84 output tube � these babies are amplification wonders. They are linear in their response, sweet-sounding, easy to drive, in current production, and best of all, quite inexpensive compared to most other output tubes. As I said, they are a great starting point.
EveAnna Manley was already well aware of the strengths (and weaknesses) of the EL-84 designs that she�d heard in the past, including Manley�s own. At this point, she and her team began earnest work on her inaugural design effort as the head honcho of Manley Labs. You see, Manley has been using the EL-84 for some time in their earlier designs, and they were very good, but EveAnna wanted to build on the positives of what had been done before and then move a huge step forward with the design of the Stingray. This would require lots of trial-and-error listening, tuning and re-designing. In addition to the musically inviting and tonally correct sound for which the EL-84 is well-known, EveAnna wanted the Stingray to posses copious amounts of boogie factor. Before they were done designing, the Stingray was going to have to rock.
Mission accomplished
I�m happy to report that the Stingray is a blast to listen to, sounding energetic and alive like no other integrated amp I�ve had anywhere near my system. It sounds all of its 50 wpc, or even more powerful, actually. The music finds its way out of the speakers and into your ears in a way similar to how real instruments get the job done, with a powerful initial attack of the note, a tonally strong sustain, and a realistic, lengthy decay. Granted, not all instruments produce sound that way, but for those that do � the pluck of a guitar string, the strike of a cymbal, the brassy blast of a horn � you know when it sounds the way it should. The Stingray gets it right . . . many other amps don�t.
For a change of pace to this review, let�s ignore for a moment how the new Manley Stingray sounds. Even doing so, I can still say that the Stingray is an unqualified success, and that you owe it to yourself to consider it for your next audio equipment purchase if you�re in the market for something like this . . . namely, tubes that rock and roll.
I promise we�ll get back to the sound of the Stingray soon enough, but in the meantime, consider other ways that the Stingray excels:
FUNCTIONALITY. The Stingray is an integrated amplifier, which means that the essential user control functions of volume, balance, and source switching are right there for you, together with the power amplifier circuit, in a single chassis. This is simplicity at its finest, and it eliminates hum problems with using interconnects. There are 4 source component inputs � enough for most listeners. The controls each have a positive, smooth motion, and a high-quality look and feel. The tubes are easily accessible and laid out intelligently. This thing flat-out works. In my dream world, the Stingray would also offer a phono amplification stage, but I�m clearly in the minority there, so it barely qualifies as a quibble.
FORM. They say that beauty is in the eye of the beholder, but in
the case of the Stingray, there must be a conspiracy amongst beholders because
everyone that has seen it agrees that this is a gorgeous piece of electronic
gear. Let�s face it, in audio
(and most industrial) design, there are too many black boxes and slight variations on
that theme. We need more gear as
visually interesting as the Stingray. Hasn�t it been proven that sex
sells? C�mon folks, have a look
at the Stingray and be given a free lesson in Knockout Visual Design 101.
Plus, the good looks of the Stingray aren�t just for show � there are
distinct advantages to having short signal paths, power switches near power
transformers, and output transformers that are close to the speaker wire taps.
That�s just plain ol� good tube audio engineering.
With the right speakers, you can truly make a little magic. And don�t worry too much about speaker compatibility, as you would be surprised at how many speakers will operate just fine on 25 wpc. If in doubt, talk to your manufacturer or favorite salesperson. Also, because the Stingray has easily accessible tubes, you have the flexibility to try different brands of input, driver, and output tubes if you so desire. This is called �tube-rolling� and it is another way to fine-tune, and often improve, the sound of your system.
Now
that we�ve considered various ways that the Stingray is a success,
let�s get back to the real question on everyone�s mind: How does it sound? In
a word, terrific. With the
Stingray, you get a product that has the musical and tonal beauty you would
expect from a well-designed tube amplifier, but also with a heart of
rock-n-roll. It�s the same heart that beats in EveAnna Manley and drives her audio design vision.
Is it too much to ask that a tube-based integrated amp simultaneously
sound warm and musical, kick out the jams in the bass and look cool while doing
it? Nope.
Have they managed to pull off this combination with the Stingray?
Yup, in in a wildly successful way.
Achieving
musical balance in an amplifier isn�t as easy as you might think.
There�s one part art to every part science.
Subtle design choices like the amount of global negative feedback in the
circuit have a big impact on the sound of an amplifier, especially the depth and
width of the soundstage. Some solid
state designs have 80 dB or more of negative feedback. That�s good for
certain technical measurements but bad for musical realism, at least to my ears.
The Stingray uses a low-feedback design of less than 5 dB.
At that level, you get adequate damping measurements, good distortion
specs, and most importantly, killer sound. That�s
just one example of how the Stingray is chock-full of technically good ideas,
with each one driven foremost by musical passion.
The design team at Manley had a clear vision of what they wanted the
Stingray to become and made the right choices to take it there.
I
wasn�t sure what to expect when I installed the Stingray into my system.
I�d been living so long with low-powered, single-ended triode amps that
I didn�t know what my ears or speakers would think of 50 wpc of push-pull
output power. Well, it took about a
minute into my first song of serious listening to know that my worries were
unfounded. This was music.
What I was hearing was good, really good.
I heard none of the cold steeliness and artificiality that I hear from
some solid state designs or inferior tube designs.
The Stingray was playing music with tremendous clarity, staging, drive
and presence, really pulling me in. True,
the presentation was different from my single-ended triode amps, but by
different I mean only that, not specifically worse or better, just different.
There is no question that I was getting more and stronger bass that I was
accustomed to, but single-ended triode amps can do bass too; they just happen to
run out of steam when mated with certain speakers listening to certain program
material. This didn�t happen with
the Stingray. It kept pumping away
and never seemed to come up short of musical drive at any sane listening level.
You
may be wondering whether an integrated amp (or one with tubes for that matter) is right for you.
I�ve seen audio consumers over the past five years seemingly re-embrace
the integrated amp as the cornerstone of a real-world hi-fi music reproduction
system. I applaud this and honestly
don�t believe you give up anything by using an integrated amp as opposed to
pricier and more complex separates. By
more complex I mean that your amp and preamp have to work well together
electrically or their individual brilliance may become combined mediocrity.
With integrated amps, that isn�t a concern, and thus you can buy one with a
lot of confidence knowing that amp/preamp compatibility is one less thing
you�ll have to worry about while building your dream system.
Besides,
the Stingray isn�t as far from separates as you might think.
What you are actually getting with the Stingray is a pair of 50-watt
monoblock amplifers, adjusted by passive controls through which you change the
source and adjust volume and balance. There
is no �preamplifier� circuit in the Stingray, per se, only the
aforementioned passive adjustments. Today�s
digital playback systems have adequate output voltage so that a preamplifier
becomes functionally redundant. Granted, I�m not in any hurry to eliminate the
preamplifier from my system when I�m using a stand-alone amplifier, feeling
that the sound directly from a D-to-A converter can sound a little thin and
unmusical, but that�s my personal preference.
If I�m using a super-sounding component like the Stingray, I�ve got
no problem having an integrated amp take care of all the music-making for me.
Priced at just $2,250, it makes me wonder whether Manley Labs has much profit on the Stingray. No kidding. When you look at the wonderful chassis work, the high-quality internal and external components and the R&D hours that it took to perfect the design, the profit margin must be pretty thin. If that�s the case, and I believe it is, Manley�s best bet is to sell lots of �em. Judging by the time that I�ve spent with the Stingray, I�ll be so bold as to predict that Manley will do just that. The Stingray is a huge winner � visually, sonically, and in any measure of value-for-the-dollar. If you have a few thousand or more to invest in your music playback, but what you really want to do is simplify things while giving up nothing in sound quality to the big-dollar separates, I recommend you check out the Stingray and prepare to be impressed.
This is a list of the music that I listened to most while taking notes for the Stingray review:
� Ben Harper � Burn to Shine (Virgin 48151)
� The Flaming Lips � The Soft Bulletin (Warner Bros. 46876)
� Dave Douglas � Charms of the Night Sky (Winter & Winter 15)
� Cassandra Wilson � Traveling Miles (Blue Note 54123)
� Bill Evans Trio � Sunday at the Village Vanguard (JVC-XRCD 051)
� Patricia Barber � Companion (Blue Note 22963)
� Copyright 1999 Secrets of Home Theater & High
Fidelity
Return to Table of Contents for this Issue.