Aural HiFi, 1438 S. Broadway, Denver, CO (2026)

01/23/2026

Krell Evolution (Evo) 402 // Preowned / Solid-State Stereo Amplifier / 400wpc

The Krell Evolution (EVO) 402 is classic big-iron Krell—serious power, absolute control, and zero apologies. Delivering 400 watts per channel into 8 ohms (and doubling down as impedance drops), the EVO 402 grabs hold of speakers with vice-like authority, serving up thunderous bass, explosive dynamics, and a sense of scale that feels effortless no matter how hard you push it. Yet it’s not just brute force—the midrange is clean and confident, imaging is rock solid, and the overall presentation is commanding without being cold. Built like a tank and voiced with that unmistakable Krell swagger, the EVO 402 is the kind of amplifier that makes everything downstream sound bigger, bolder, and more alive. It doesn’t ask politely—it takes control of your system.
*Ships via courier in its original packaging
S/N: 58506110030

Thoroughly cleaned internal electronics
Detailed exterior
Professionally tested. Performs at factory spec

$4599

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01/23/2026

Bowers & Wilkins (B&W) Matrix 801 Series 3 // Vintage / Floorstanding speakers / Recapped & Refinished

The Bowers & Wilkins Matrix 801 Series 3 is a true studio-born legend—an unapologetically serious loudspeaker that helped define what “reference” meant in the late ’80s and ’90s. Designed by Bowers & Wilkins and famously used in mastering rooms around the world, the 801 S3 delivers scale, neutrality, and authority in a way few speakers can. This vintage floorstander has been fully recapped and refinished, with the woofers professionally reconed, bringing performance back to spec and then some. Mounted on proper Sound Anchor stands, they lock into the room with focus and control, delivering deep, articulate bass, an open and revealing midrange, and that unmistakable Matrix-cabinet clarity that lets recordings speak for themselves. Big, honest, and endlessly revealing, these aren’t “vibe” speakers—they’re truth tellers, restored and ready to work (or play) at the highest level.
S/N: 006420 / 006421

Cabinets sanded out and refinished. Clear over raw walnut.
Crossovers recapped
Both woofers reconed
Mounted on Sound Anchor stands

$3999

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& Wilkins

01/23/2026

Z-Systems rdp-1 // Preowned / Digital Preamplifier / EQ

The Z-Systems RDP-1 is one of those sleeper studio legends that found a cult following among audiophiles who know what real digital control sounds like. Designed by Z-Systems, this is a reference-grade digital processor built for mastering engineers, not marketing departments—and you can hear it instantly. The RDP-1 delivers ultra-precise digital volume control, input switching, and processing without smearing, flattening, or bleaching the music. The presentation is clean, dynamic, and shockingly transparent, with rock-solid imaging and zero digital nasties. It’s not flashy, it’s not trendy, and it doesn’t try to sound “analog”—it just gets out of the way and lets the source speak. For digital purists and system builders chasing absolute control with zero compromise, the RDP-1 is a serious, no-nonsense weapon.
*Includes original box, manual, and remote

Verified all inputs and outputs
RCA
XLR
Optical
Verified operation of controls
Verified remote control operation
Unit has original box and packing materials

S/N: 04372
FACTORY SPECS
Digital inputs: 2 AES/EBU, 3 S/PDIF (RCA), 1 optical (TosLink with ST-type glass optional)
Digital outputs: 1 AES/EBU, 1 S/PDIF (RCA), 1 optical (TosLink with ST-type glass optional). 24-bit input/output. 32-bit DSP with internal 40-bit floating-point arithmetic, used for all gain and equalization
Dynamic range: >144dB
THD+N: better than -135dB
Number of memories/presets: 99
Gain control: from -95dB to +12dB.
Dimensions: 17" W by 4.5" H by 10" D
Weight: 14 lbs

$1200

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-Systems

01/23/2026

Rega Planar 3 // Preowned / Belt Drive Turntable / Rega Bias 2 Cart / Infinity Black Window Tonearm

The Rega Planar 3 is a no-frills, all-music turntable that’s earned its legendary status by doing the basics exceptionally well. This preowned belt-drive setup comes fitted with a Rega Bias 2 cartridge, giving you a warm, punchy, rhythm-forward sound that makes records feel lively and engaging from the first drop. The real wildcard here is the Infinity Black Widow tonearm—an ultra–low-mass classic that brings speed, delicacy, and a beautifully airy top end to the mix. Together, it’s a killer combo: tight timing, open mids, and that unmistakable “just one more side” energy. Simple, smart, and endlessly listenable, this Planar 3 is proof that great vinyl playback doesn’t need to be complicated—it just needs to be right.
S/N : 139914

RESTORATIONS

Installed Infinity Black Widow tonearm assembly
Installed and aligned Rega Bias 2 cartridge
Replaced RCA output wire harness
Verified speed

$1399

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01/22/2026

Harvard Electronics H3 - Futterman // Vintage / OTL Stereo Tube Amplifier / Restored and Extremely Rare (A)

The Harvard Electronics H3 is a rare and fascinating piece of vintage hi-fi history—an OTL (Output Transformerless) tube amplifier designed by Julius Futterman himself. That alone puts it in rarified company. Like Futterman’s later and better-known designs, the H3 ditches output transformers in favor of a direct, wide-bandwidth signal path, resulting in a sound that’s startlingly open, immediate, and alive. The presentation is pure Futterman: a holographic midrange, lightning-fast transients, and an unfiltered sense of connection to the music that feels almost electrostatic in character.
Built in an era when audio design was fearless and personal, the H3 isn’t just rare—it’s historically significant. It carries the unmistakable fingerprint of one of hi-fi’s most radical thinkers and offers a glimpse into the early evolution of OTL amplification. For collectors and listeners alike, this is the kind of amplifier that doesn’t just play music—it tells a story.
S/N: N/A

Installed new 6ej7 tubes
Adjusted bias
Cleaned control contacts
Verified power and distortion at 1kHz :
Left Channel 21.2 watts RMS into 8 ohms @0.328%THD+N
Right Channel 22.0 watts RMS into 8 ohms @0.305%THD+N

Installed new 6ej7 tubes
Adjusted bias
Cleaned control contacts
Verified power and distortion at 1kHz :
Left Channel 21.2 watts RMS into 8 ohms @0.328%THD+N
Right Channel 22.0 watts RMS into 8 ohms @0.305%THD+N

$4999

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Electronics

01/21/2026

Nagra MPA // Preowned / Solid State Power Amplifier or Integrated Amplifier

The Nagra MPA is pure Swiss muscle with a studio pedigree—an elegant yet brutally serious power amplifier built to deliver absolute control and transparency. Designed with Nagra’s broadcast and mastering heritage firmly in mind, the MPA combines immense current capability with an almost eerie sense of calm, letting speakers disappear while music expands effortlessly into the room. Sonically, it’s fast, authoritative, and incredibly clean, with rock-solid bass grip, lifelike dynamics, and a natural flow that never feels forced or sterile. Like all great Nagra gear, it’s engineered like a precision instrument and voiced with restraint and confidence. The MPA doesn’t show off—it simply delivers music with scale, realism, and unwavering composure.

*Ships via private courier in its original box. Includes the manual, remote, feet for vertical orientation, and both faceplates to convert to either a power amplifier or integrated amplifier.
S/N: 550052404020

$5999

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Amplifier

01/21/2026

Nagra PL-P // Preowned / Tube Preamplifier with MM/MC Phono Stage / Pure Class A (5500728)

The Nagra PL-P is Swiss preamplifier perfection—elegant, obsessive, and unapologetically serious about musical truth. Designed during Nagra’s golden era, the PL-P brings the brand’s legendary professional heritage into the home with stunning results: jet-black backgrounds, uncanny dynamic realism, and a sense of control that makes everything downstream sound better. Its phono stage is especially revered—quiet, precise, and utterly musical—while the line stage delivers clarity and flow without ever feeling clinical. Like everything from Nagra, the PL-P is built like a scientific instrument and voiced like a concert hall. It doesn’t add flavor or drama—it simply steps aside and lets the music speak with authority, scale, and grace.
S/N: 5500728

Replaced rechargeable NiMH batteries
Replaced six capacitors in the power supply
Verified input/output levels
Verified all inputs, outputs & functions
Verified modulometer and indicator operation

$8499

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01/21/2026

Krell KPS 28c // Preowned / CD-HDCD Player

The Krell KPS 28C is classic Krell digital muscle—dense, serious, and unapologetically overbuilt. A one-box CD player from Krell’s golden era, the 28C packs massive internal power reserves, a rock-solid transport, and fully balanced circuitry into a chassis that feels more like an amplifier than a disc spinner. Sonically, it delivers the unmistakable Krell signature: huge dynamics, iron-fisted bass control, and a bold, authoritative presentation that makes CDs sound physical and alive. Imaging is locked in, detail is carved cleanly, and the overall feel is confident rather than clinical. The KPS 28C isn’t about convenience or nostalgia—it’s about proving just how powerful and engaging Red Book digital can be when it’s done the Krell way.
*Includes the manual and remote
S/N: 13501090378
Type: CD/SACD Player, HDCD capable.
Design: Krell's proprietary current-mode, fully balanced design.
Outputs: Includes Balanced XLR and likely proprietary CAST connections.
Digital Conversion: Utilizes Burr-Brown PCM1790 DACs for 192kHz/24-bit processing.
Formats: Plays CD, SACD, and DVD-Audio discs.
Audio Quality: High bandwidth (claimed -3dB at 1.5MHz for related Krell circuits), Class A operation.
Build: Heavy, substantial build quality (around 13 kg / 28 lbs)

$2399

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Player

01/16/2026

Nakamichi System-One // Vintage Stereo System // 620 Amplifier / 630 Preamp-tuner / 600 II Cassette Deck / Timer

The Nakamichi System One is peak late-’70s Japanese hi-fi cool—a beautifully matched separates system that shows just how serious Nakamichi was about sound long before they became cassette legends. Designed as a cohesive stack rather than random components, System One delivers a sound that’s clean, dynamic, and effortlessly musical, with that unmistakable Nakamichi precision and refinement. Everything feels intentional: the minimalist industrial design, the silky controls, and the way the system presents music with clarity and balance rather than brute force. It’s understated, elegant, and quietly confident—hi-fi that doesn’t shout, but absolutely knows what it’s doing. A true collector’s setup that captures Nakamichi at the moment they were becoming something special.

This system was designed to use a single stereo amp. Instead of closing that space with the metal cover that it came with, we decided to put a second (non-functional) amp in its place... because it just looks cooler :) And great as a parts unit for the working amp.
S/N's: 1101616 / 4201365 / 02401 / 4102071 / 4105352
RESTORATION

2 new large power supply caps in the working 620 amp
Re-glued pot k***s as necessary
Verified radio tuner and associated functions
Right channel was out on the tape player, opened it up and Tom worked his magic; no issue since.
Re-installed all units back in rolling rack

Tested together all good, (except the 2nd broken/irreparable stereo amp on the bottom, obviously).
For the cassette deck:

Replaced belts and idlers
Replaced "Tape" switch
Burnished contacts on Record/Play switch
Adjusted azimuth
Adjusted record and tape bias
Cleaned tape path
Adjusted speed
Cleaned control contacts

$3999

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System

01/16/2026

Audio Research EC-22 // Vintage / Active Electronic Solid State Crossover (90148003)

The Audio Research EC-22 is a beautifully straightforward piece of vintage ARC engineering—a no-nonsense electronic crossover built for audiophiles who wanted precision without sacrificing musicality. Designed in the early days of Audio Research’s rise, the EC-22 brings that classic ARC sensibility to system tuning: clean signal paths, thoughtful circuitry, and a sound that stays out of the way while letting the music do its thing. Sonically, it’s smooth, coherent, and remarkably transparent, helping active systems lock in tighter bass, clearer mids, and better overall balance without adding glare or grain. It’s utilitarian in looks, serious in purpose, and quietly brilliant—one of those behind-the-scenes components that doesn’t ask for attention, but earns respect the moment you hear what it does.
S/N: 90148003

Has the 150Hz/200Hz with 12dB/6dB slope cards installed
Repaired crossover card that s=was shorting pins
Cleaned all pots and switches

Detailed
Crossover Cards Available (as replacement or additional cost)
400Hz/400Hz with 6dB/6dB slope
500Hz/500Hz with 12dB/12dB slope
We also have a card that hasn't been set for crossover points that you can set your own with.

$1599

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Research Crossover

12/13/2025

McIntosh MC2105 // Vintage / Solid-State Amplifier / Electronically Restored (AH2602)

The McIntosh MC2105 is one of the most beloved solid-state classics in the Mac lineup—those iconic blue meters, the glass faceplate, and a sound that defined an era of American hi-fi. Delivering 105 watts per channel with that unmistakable McIntosh smoothness, the MC2105 is known for its rich midrange, unfatiguing highs, and bass that’s warm, confident, and wonderfully musical.
This unit has been electronically restored, including the critical replacement of the large filter capacitors, giving it the stability, punch, and low-noise performance it deserves. With fresh power reserves and updated internals, it plays with greater authority, clarity, and ease—while retaining every bit of that classic Mac character.
A beautifully revitalized piece of hi-fi history, ready for decades more of those soft-glowing, blue meter-dancing nights.
S/N: AH2602

RESTORATION

Replaced all faulty front panel bulbs
Replaced blue film in front of VU meters
Replaced all electrolytic capacitors including large filter caps
Cleaned and verified all pot and switches
Exceeds factory power distortion specs

SPECS

Type Solid State Integrated Amplifier
Power output 105 watts per channel into 8Ω (stereo)
Frequency response 10Hz to 100kHz
Total harmonic distortion 0.25%
Damping factor 13
Input sensitivity 0.5V
Signal to noise ratio 90dB
Speaker load impedance 4Ω to 16Ω
Semiconductors 34 x transistors, 18 x rectifiers and diodes
Cabinet fits L14, L21, L54
Dimensions 16.2"W x 7.12"H x 14.5"D
Weight 65 lbs.

$3499

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Aural HiFi

01/23/2026

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12/13/2025

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