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* K = 1000. PR = pair. PTC = partial trades considered.
AllegroSound™ has been dedicated to
accurate recording and reproduction of
acoustic music for well over ¼ Century.
For those who value ears-on experience,
AllegroSound is "hear" to assist you.
Trades welcome! AllegroBio
* AllegroQC™ with 40 yrs experience.
* Safe-Packing. Trust your purchase
to one who knows & cares to pack it
so you receive it in same condition.
* Ci with HTS# provided on foreign
shipments reduces unnecessary
delay and damage in Customs.
Some be 10~60 yrs old with imperfections,
non-functioning lamps, old capacitors, etc;
NO "mint", "minty", "perfect", "excellent".
(to avoid confusion between "excellent" and
"perfect", "very good" be my top official rating).
All pre-owned/used unless otherwise ntd.
AllegroGrade™ on scale of 1~7:
7 = New-In-Sealed-Box.
6 = New-In-Open-Box.
5 = Demo-In-Open-Box.
4 = VeryGood. 3 = Good. 2 = Fair. 1 = Poor.
* most be AG-4; pics sent prior to packing.
See Pics, MainsVoltage, Terms below and
Questions & Answers (Q+A) in Menu.
Pics are shown for display purposes
& may not represent exact condition;
text trumps pics - read description
and email if you need clarification.
Mains Voltage & What To Do About It
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* prices NET-USD f.o.b. Los Angeles, California, USA.
* k = US$1,000. ptc = partial trades considered.
* tbd = to be determined. mp = matched pair.
* prices w/o deposit subject to change w/o notice.
* AllegroLayAway™ with 20~30% down.
* AllegroTradeUP™ with your approved trade-in.
* AllegroBuyBack™ on selected items (see A+Q).
AllegroSound trade-ins/purchases are not
final until received, inspected, tested and
approved by AllegroSound. Items failing to
meet represented condition will be returned
at Customer's expense plus $90/hr labor for
additional fees may apply.
All tubes sold by AllegroSound have been
carefully tested on the finest equipment
and, therefore, are technically "used".
* most plug-in tubes carry our exclusive
100-day exchange/1-yr pro-rated warranty.
Terms & Conditions
Equipment is carefully inspected, cleaned,
variac'd, tested for dc-offset & auditioned
in ref system before it leaves our facility.
Quality work with TLC takes quality time;
I work at my pace & have orders ahead
of yours; item will ship when testing is
completed and packed for safe transit.
Suitability sole responsibility of Buyer.
Not responsible for errors/semantics/etc.
All items subject to prior sale or no sale.
Prices subject to change without notice.
All equipment as-is without warranty.
All sales f.o.b. Los Angeles California;
all matters & costs beyond this point,
including, but not limited to, packing,
freight, ins, taxes, fees, duty, are sole
responsibility of Buyer. All sales final.
L.A.C. Sales Tax applies in California.
When your system doesn't sound good, u don't feel good;
when you don't feel good, your work is not good;
when your work is not good, your marriage is not good;
when your marriage is not good, you get divorced;
when you get divorced, you loose your system.
Upgrade today at AllegroSound.com
AMPLIFIERS: Tube + Hybrid
Seems like all solid-state amps these days are advertised "tube-like".
And cd's are "Perfect sound forever"... & the spin goes on and on...
The reality is, if you want the sound of tubes, you need tubes.
* Taps matter! spkr's minimum-Z should not dip lower than the tap
driving it; modern tube amps should have 2-Ohm taps to drive
modern spkrs which typically dip below 4-Ohms; one of few to get
this (and other things) right was Mark Levinson Red Rose Music.
* Never operate a tube amp without a load (speaker or resistor).
* AllegroSound amps are never hard-started, never run without
a load, and most 7/8/9-pin tubes have 100-day AllegroWarranty.
SET, 2-channels, small size, BIG sound...
hail the Audio Note Conqueror
Single-Ended Triode stereo amp
c.1997, late Version, low hours,
2-6SN7, 2-300B, 5U4, 8+4 Ω taps,
fresh and matched EH/JJ 300B's.
(or, you could pay 5x more for a
Shindo Cortese without 4Ω taps)
* fyi, if your spkrs dip below 8Ω
(most do) you need 4 Ohm taps!
Audio Note Conqueror SET
E.A.R. Yoshino 869. a Tim de Paravicini design.
Esoteric Audio Research / E.A.R. / Yoshino
869 Enhanced Triode Mode Single-Ended
integrated, 15w/ch 4-8-16Ω, 5+Direct ins,
pre+tape out, AllegroMods™ + full comp
of primo NOS German and USA bottles.
Simply magical on Quad ESL-57 stats!
* update of fabled 859 w/added Amp-Direct
& even better output transformers.Sweeet!
arguably Paravicini's best-sounding amp.
E.A.R. Yoshino 869 integrated amp
former engineer for Saul Marantz builds a better amp...
fabled Hadley Labs 601
stereo tube amp c.1963,
#61 of only 90 produced,
outperforms Marantz 2-5-8-9,
xfmrs, all-original including
simply magical on Quad-57
& Infinity ServoStatic 1's.
Hadley 601 tube amp
have it both ways: tubes for voltage, mosfets for current
Lector VM-200 hybrid amp,
100w/ch/8 and 150w/ch/4,
14GW8 Input+Driver tube,
mosfet output, low feedbk,
gloss-black side panels.
(or, you could pay 12x more for new
Lamm M2.2 hybrid mosfet monoblks)
Lector VM-200 VM200 "brid"
Legend Audio LM-Triode monoblocks,
designed & manufactured in California
USA with TLC by Von Gaylord Audio,
2 triode-connected KT88-KT90-6550
delivers 40 sweet Watts into 4-8-16 Ω,
2-12AX7 input/drvr, 5AR4-GZ34 rectifier,
auto-bias, oil-filled caps, 40#, low hrs,
hard-wired, mirror-imaged matched-pr.
(or, you could pay 3x for Nirvana 4's or 33x for Uni-Sea's)
"...this is the most involving & musical amplifier of this genre...
imense soundspace & captures the full recorded acoustic from
a warm but natural perspective...Downsides? They'll take time
away from other activities because you will be belted into your
listening chair for far longer sessions." —PB/TAV.
"...beautiful transparency, ravishing liquidity, very clean sound
and excellent neutrality...wonderfully musical...IAR Best Buy."
Legend Audio LM-Triode amps
Switch on-the-fly between SE or PP to match music/spkrs
fabled David Manley SE/PP-300B
monoblock amplifiers c.1995,
switch on-the-fly between 18w
Single-Ended & 36w Push-Pull
(switch from SEP for Shirley Horn
to PP for Mahler and Pink Floyd ),
0~10db feedback in 1db discrete steps
for precise matching to your speakers,
fresh matched JJ/Tesla Slovak 300B's,
120-240vac, only 11.5"w - 10"d - 6"h.
(or, you could pay 2x more for large/heavy Neos)
(btw, EveAnna prefers this orig ver to later Retro)
ST in Stereophile: "SE/PP-300Bs have almost as much
delicatessen & detail as the Jadis SE300Bs, & they have
balls in the bass too, even in SE mode with no feedback...
comes very, very close to the sound of costlier amps such
as Wavelength Cardinal & Jadis 300B...I'm going to have
trouble sending these back." Stereophile Class A-rated.
Manley SE/PP-300B monoblocks
since 1949, like no other...
McIntosh MC-30 Type A-116-B c.1949,
30w/4-8-16 Ohm taps, matched-pair,
Chassis # 08003 and # 08004,
Serial # 7E690 and # 7E692,
all original except the tubes,
delivers superior sound quality
(6L6 be superior to 6550, EL34, etc),
5U4-rectified for superior reliability,
Volume controls to bypass preamp
or match other amp in bi-amp setup,
Mac's all-time-best tube amplifier.
McIntosh MC-30 monoblocks
a Mile Nestorovic design based on his original MC-3500/MI-350 for McIntosh Labs
fabled Nestorovic Labs tube amps c.1985,
your choice of matched-prs w/fresh tubes:
* Nestorovic Alpha-1 monos #122 / #123,
* Nestorovic NA-1 monoblks #136 / #137,
Balanced update of Mile's legendary
design for Mcintosh (MC-3500, MI-350)
producing 150 Watts from inexpensive pr
of 6KD6 beam-tubes, Balanced and SE in,
8+4Ω Balanced Out, switchable Feedback,
very exclusive, less than 100 pairs made.
(or, you could pay 3x more for non-bal MC-3500)
♥ Stereophile 9/91: "...the lyrical elements of
the music flowed so naturally, amost song-like...
realistic image size...excellent dynamics."
♥ TAS 3/83: "...all things considered, the more
power in a good tube design, the more concert-
hall realism at any given playback level."
Nestorovic Labs Alpha-1 tube amps
Nestorovic Labs NA-1 tube amps
Mark Levinson loves music so much, he built a monument to it
Mark Levinson Red Rose Music
Model One Reference Monoblocks,
conceived, designed & manufactured
with excellence entirely in the USA
(no, Martha, these were not made in
China like the solid-state models!),
#04 & #05 c.1998 with updates,
170w Ultra-Linear or 65w Triode,
2-4-6-8Ω taps (high-current 2Ω tap
enable this amp to drive speakers
other tube amps can only dream of),
4-6SN7, 8-6L6/5881, (1-5842/417A),
on-brd mtr, all-Balanced signal path
with NO phase-converter to alter
the acoustic of the recording venue!
(RCA-in adds 5842 phase-converter
for Single-Ended source, if you must),
100-120-240V World Power Supply,
Auto-Standby, factory crates, low hrs,
ultra exclusive (< 200 pairs produced,
few in special Champagne-Gold finish),
outperforms all SETs & everything else!
(or, you could pay 7x more for a new pr
of Lamm ML-3's with 1/5th the power)
♦ To paraphrase Dr. Strangelove,
"The whole point of a simple circuit
is lost if you make it expensive."
♣ In the immortal words of Joe E. Brown,
"Well, nothing's perfect."
♥ In the opinion of AllegroSound,
"These come close; very close."
CLICK for Red Rose Reference
SETing the bar higher...
Wavelength Signature Series
Duetto v2.1 SET 2-ch c.2000
framed in maple, all options,
8w/ch, 2-6SL7, 2-300B, 5AR4,
switchable 4Ω - 8Ω taps,
fresh matched EH/JJ 300B's.
(or, you could pay 3x more for a new Airtight ATM-300)
"a legitimately high-end piece of gear so
superior to its peers, I would never part
with it for any reason." —Ian White, ETM
Wavelength Duetto v2.1 SET
seldom equaled, rarely surpassed...
Western Electric 300B.
"combined everything good that can be found in other
300B's; it had the KR's authority, but was devoid of any
obtrusiveness; bass was deep, but in total balance with
rest of the spectrum, and was controlled & easy-flowing;
it bettered all other tubes in air, space, width, and depth;
very involving too...if you want the best, there's only the
Western Electric." —PvW, Stereophile.
− Established 1973 −
"love what you listen with"
Los Angeles, California USA
AllegroSound et al assumes no responsibility for use or misuse of products, services, info, etc.
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