Conrad Johnson Classic Phono
The Conrad Johnson Classic Phono brings vinyl alive with rich tonal colour, holographic imaging and fleet, natural transients. Alan Sircom found its blend of vintage sweetness and modern focus especially compelling, while Ed Becker praised its transparent, spacious presentation. This is a deeply musical valve stage that reveals texture, scale and emotional nuance without sacrificing rhythmic grip.
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Nicely Roasted
Sound Quality
92/100
Cartridge Compatibility
84/100
Build Quality
89/100
Value for Money
85/100
Pros
Expansive, deep and solidly focused soundstage that extends beyond the loudspeakers.
Combines rich, natural tonal colour and musical insight with modern focus, precision and transient speed.
Highly resolving phono performance preserves fine texture, air and natural instrumental decay.
Quiet, well-shielded design with useful high- and low-gain configurations.
Cons
Cartridge-loading adjustments require removing the top plate and using small internal DIP switches.
Less overtly analytical than the earlier TEA1 and TEA2, favouring musical insight over maximum forensic detail.
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What Reviewers Are Saying
SOUND QUALITY PERFORMANCE 92/100
Reviewers describe a notably open, musically communicative phono stage that combines vintage Conrad Johnson sweetness with modern focus and precision. It is especially praised for lifelike instrumental texture, unforced detail, dynamic shading, and expansive three-dimensional imaging.
Transparency Noise Floor
91/100
The Classic Phono is described as highly resolving and transparent, with fine string detail, natural decay, abundant air, and a convincing sense that the electronics vanish from the presentation. Its shielding and anti-RFI measures are noted, although the reviews do not provide extensive listening commentary specifically about hum or hiss.
Tonal Balance Musicality
94/100
Alan Sircom found it to retain early Conrad Johnson sweetness while adding the tonal accuracy, focus, and insight of the company’s later designs. Both reviews praise natural vocal and instrumental tone, rich midrange texture, and a romantic-but-not-overly-lush presentation that serves the musical whole.
Dynamics
90/100
The Classic is said to preserve timing, rhythm, and pace on fast music, with guitar plucks and piano strikes arriving quickly and decaying naturally. Hi-fi+ also highlights dynamic shading and notes that its musical warmth does not blunt more forceful, beat-driven recordings.
Soundstage Imaging
94/100
Spatial performance is a major strength. Reviewers report a deep, wide and holographic stage extending beyond the loudspeakers, with stable image placement, strong image solidity, and convincing height and depth.
Assessments of Build Quality, Usability, and Overall Propositions.
Cartridge Compatibility
84/100
The Classic Phono is offered in 40dB low-gain and 53dB high-gain versions, with selectable resistive loading from 47k ohms down to 160 ohms. That provides useful matching scope, but loading changes require removing the top plate and operating small internal DIP switches, rather than making adjustments from the front panel or rear.
Build Quality
89/100
Reviewers note substantial construction, including a solid brushed-aluminum fascia, heavier-gauge steel chassis, and careful protective packaging. The phono circuit also uses discrete regulated supplies, shielding, and anti-RFI measures intended to support stable, clean operation.
Value for Money
85/100
The reviews identify pricing at approximately £7,495/$7,000, rising to £8,995/$9,000 for the Special Edition, but do not directly judge its competitiveness against similarly priced phono stages. The consistently enthusiastic performance comments suggest a serious high-end offering, while leaving the value case largely unaddressed.
Reviews & Sources
Professional reviews and sources for this product's Watt'n Potatoes analysis.
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Specifications
- Gain
- High Gain: 53dB Low Gain: 40dB
- Overload
- Overload HG: 10 mV Overload LG: 50 mV
- Hum and Noise
- Hum and Noise HG <750uv Hum and Noise LG <500uv
- Phase
- phase correct
- Output Impedance
- below 750 ohms
- Dimensions
- 13.625”D x 19”W x 3.625”H
- Net Weight
- 13 lb net
Manufacturer's Description — Conrad Johnson
The CLASSIC triode equalization amplifier is a vacuum-tube phono stage offering an extraordinary degree of musical accuracy at a moderate price. The audio circuit of the CLASSIC is comprised of two cascaded single-ended triode amplifiers, and one single-ended triode cathode follower.
The circuit is a zero-feedback design, to eliminate the temporal inaccuracies that negative feedback introduces. RIAA equalization is established by a passive network between the two gain stages. This network has been carefully designed and has been implemented with precision (1% tolerance) parts to precisely track the prescribed RIAA equalization curve assuring absolute tonal accuracy. Careful implementation of this fundamentally simple circuit results in extremely wide bandwidth, and low distortion, without resorting to negative feedback. A low-impedance vacuum-tube cathode follower stage follows the second gain stage to achieve a low output impedance (less than 700 Ohms).
In the CLASSIC, discrete regulated power supplies, carefully designed for minimum impedance, even at the highest audio frequencies, isolate the amplifier stages from the ac line and from each other to guarantee that power supply irregularities do not degrade the audio performance.
The CLASSIC is available in high-gain (53 dB) and low gain (40 dB) versions to match a wide range of modern phono cartridges.
The high gain version is recommended for use with cartridges with a rated output of 1.0 mV or below. The low gain version is best suited to higher output cartridges. Both versions offer switch selectable resistive loading allowing the user to fine-tune performance to the chosen phono cartridge.
The performance of any audio component is only as good as its component parts.
The audio circuits and the related regulated power supplies of the CLASSIC use polypropylene capacitors and precision metal film and metal foil resistors exclusively. All parts in the CLASSIC’s RIAA compensation network are 1%tolerance, to assure precise tracking of the RIAA curve. Input and output connectors and even hook-up wiring have been carefully selected for audio performance.
The CLASSIC SE takes the parts quality up a notch further.
Twelve of the most critical resistors in the audio circuit are upgraded to laser-trimmed metal foil resistors. Seventeen capacitors are upgraded to CJD Teflon capacitors (chosen for their exceptionally low “memory” characteristic), including intra-stage coupling capacitors and critical “bypass” capacitors.
Thoughtful engineering, specification of quality component parts, and painstaking care in production are clearly on display in each of the CLASSIC models.
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Authorized dealers for Conrad Johnson Classic Phono
- Ajasom — online and in-store — Amadora, Lisboa, Portugal (website)
- ALAIN CHOUKROUN — online and in-store — Paris, Île-de-France, France (website)
- Audio Breakthroughs — in-store — Manhasset, New York, United States (website)
- Audio Foundations — in-store — Hutto, Texas, United States (website)
- Audiogears — in-store — Casalecchio di Reno, Emilia-Romaña (website)
- Blumenstein Audio — in-store — Tacoma, Washington, United States (website)
- Chicago Hifi — in-store — Northfield, Illinois, United States (website)
- Class D Audio USA — online — United States (website)
- Fidelis Audio — in-store — Nashua, New Hampshire, United States (website)
- George Meyer AV — in-store — Los Angeles, California, United States (website)
and 17 more verified dealers