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MissionAllegroSound has been dedicated to the
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.
for AllegroBio 
Featuring* AllegroQC™ with 37+ yrs experience.
* Safe-packing. Trust your purchase to
one who knows & cares to pack it right.
World-Wide Shipping
ConditionSome be 10~60 yrs old with imperfections,
non-functioning lamps, old capacitors, etc;
NO "mint", "minty", "perfect", "excellent".
AllegroGrading™ : 5 = New-In-Box,
4 = VeryGood, 3 = Good, 2 = Fair, 1 = Poor.
All pre-owned/used unless otherwise noted.
See Pics, MainsVoltage, Terms below.
PicsPics 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
220~240 Vac
PricesFrom computer, place your pointing-arrow
ON the rotating $-sign below each listing;
price will pop up within 2 or 3 seconds;
if not, Click "HELP" in the floating Menu >>>
* all prices U.S. currency f.o.b. Los Angeles, California USA.
* prices without deposit subject to change without notice.
* AllegroLayAway™ with 30% non-refundable deposit.
* AllegroTradeUP™ with your approved TRADE-IN.
Trade-insTrade-in & purchases are not final until received,
inspected, tested and approved by AllegroSound.
Items failing to meet described condition will be
returned at customer's expense plus $50 min fee
for inspection/testing; additional fees may apply.
Vacuum Tubes"New" and "NOS" tubes sold by AllegroSound
have been operated during testing, auditioning
and burn-in & therefore are, technically, "used".
Terms & ConditionsEquipment 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 and costs beyond this point,
incl, but not limited to, packing, freight,
duty, taxes, fees, are sole responsibility
of Buyer. All sales final. No refunds.
Add 8.75% SalesTax in California.
AMPLIFIERS: Tube + HybridSeems like all solid-state amps these days are advertised "tube-like".
And cd's are "Perfect sound forever"... and the spin goes on and on...
The reality is, if you want the sound of tubes, you need tubes.
fyi, never operate a tube amp without a load (spkrs or resistor).
SET, 2-channels, small footprint, 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 a Tim de Paravicini design.
Esoteric Audio Research / E.A.R. / Yashino
869 Enhanced Triode Mode Single-Ended
stereo integrated amp, 15w/ch 4-8-16 Ω,
5+direct in, pre+tape out, upgraded tubes,
update of fabled 859 with added direct
amp input and improved output xfmrs.
E.A.R. 869 ETM integrated SE 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,
high-nickel wide-bandwidth
xfmrs, all-original including
Hadley-branded Telefunken,
simply magical on Quad-57
and Infinity ServoStatic 1's.
(or, you could pay more Marantz 9's)
Hadley 601 tube amp Peerless nickel trannies, Hovland caps, plug-n-play...
fabled Heathkit W-5M ultra-wide bandwidth
(±1db from 5Hz way out to 160kHz at 1W!)
vacuum-tube monoblock power amps (2),
classic Williamson circuit with Peerless 16309
nickel-core transformer driven by a pair of
peerless KT66-6L6-5881-7027-7581 beam-tubes
(a la McIntosh MC-30 & Red Rose Music M1),
tube/choke ps, 5R4GY, 2-12AU7, 2-KT66,
serviced and upgraded by Bob Hovland.
Heathkit's best version of it's best amplifier
(not as rare as W-6A, but 6L6's, tube/choke ps,
& high-nickel trannies in W-5M be superior).
matching WA-P2 preamps available.
Heathkit W-5M W5M monoblocks tube front-end, mosfet output...
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" "..involving...musical...transparent...liquid...neutral...imense soundspace.."
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.
"...this is the most involving and 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 ML-Triode monoblocks Switch on-the-fly between SE or PP to match music/speakers
fabled David Manley SE/PP-300B monos
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.
(EveAnna prefers this orig DM ver to her later Retro).
ST in Stereophile: "The SE/PP-300Bs have almost as much
delicatessen & detail as the Jadis SE300Bs, & they have balls
in the bass too, even in single-ended mode with no feedback...
comes very, very close to the sound of costlier amps such as
the Wavelength Cardinal and Jadis 300B...I'm going to have
trouble sending these back." Stereophile Class A-rated.
(or, you could pay 2x more for new pr of larger/heavier Manley Neo)
Manley SE/PP-300B SEPP300B monos 
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),
6L6-1614-5881-KT66 beam-tube
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,
arguably Mac's all-time-best tube amp.
McIntosh MC-30 MC30 MP
Balanced update of McIntosh MC-3500/MI-350 by the designer
fabled Nestorovic Labs tube amps c.1985,
your choice of matched-pairs w/fresh tubes:
* Nestorovic Alpha-1 monoblks #122 / #123,
* Nestorovic NA-1 monoblocks #136 / #137,
balanced update of Mile's legendary design
for Mcintosh Laboratory (MC-3500, MI-350)
producing 150 Watts from inexpensive pair
of 6KD6 beam-tubes, Balanced & SE inputs,
8+4 Ohm Balanced Out, selectable Feedback,
very exclusive, less than 100 pairs produced.
Visually-Physically-Electrically BALANCED!
(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...& this is true at any given playback level."
Nestorovic Labs 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 are 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
RLM 300B SET amplifier c.2005, 8w/ch, 2-6SN7, 2-300B,
5U4, Magnequest transformers,
Variable Feedback and Volume,
hand-wired, all tubes fused!
fresh matched EH/JJ 300B's.
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.
"...a legitimately high-end piece of gear so superior to its peers
that I would never part with it for any reason." —Ian White, ETM
(or, you could pay 3x more for a new Airtight ATM-300)
Wavelength Duetto v2.1 SET stereo amp better construction equals better sound.
fabled VAIC VV30B Type-1 Matched-Quartet,
direct 300B swap in amps that can supply
higher filament current for this super-tube,
excellent in VAC Renaissance, Welborne,
AudioNote, Wavelength and many others.
JC/Stereophile: "My fave 300B by a wide
margin is the beautifully-crafted VAIC
VV30B Type 1...these refined & elegant
tubes are fabricated by hand in the old
Tesla Reserch Labs in Czech Republic...
a plug'n'play 300B equivalent." (also a
fave of Wavelength's Gordon Rankin)
Vaic VV-30B VV30B triode tubes seldom equaled, rarely surpassed...
Western Electric 300B
WE300B tubes 
AllegroSound
− Established 1973 −
"love what you listen with"
Los Angeles, California USA
Rick@AllegroSound.com
CONTACT AllegroSound 
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