Cayin CS-100A EL34 black

Name: CS-100A EL34 black
Brand: Cayin
SKU: 0695791490125
Price: 2990.0 EUR
Availability: BackOrder
Rating: 5.0 (1 reviews)

(1 customer review)

Finish : Black

Overview

The Cayin CS-100A EL34 is a stereo integrated amplifier that combines generous power with refined sound, thanks to its 13 carefully selected tubes. Capable of delivering up to 2x80 watts in ultra-linear mode or 2x50 watts in triode mode, it adapts to a wide variety of speakers and listening preferences. Its robust construction, high-end components, and comprehensive connectivity make it a top choice for demanding audiophiles. Available in silver or black finish, the CS-100A EL34 has been honored with the prestigious “Golden Ear Award” for its outstanding sonic performance.

Three-quarter front view of a silver brushed aluminum audio amplifier, featuring four toggle switches below the “BIAS SELECTOR” label and a large cylindrical volume knob on the right

Uncompromising construction

The Cayin CS-100A EL34 makes a strong impression at first glance with its imposing silhouette and meticulous design. With dimensions of 420 x 394 x 200 mm and a substantial weight of 30 kg, this amplifier clearly signals its audiophile ambitions. This considerable mass is explained by the presence of an oversized toroidal transformer and high-quality components that ensure stable power delivery, even during the most demanding musical passages.

The anthracite metal chassis features a front panel available in two finishes: Silver or Black. Its classic aesthetics are enhanced by the majestic presence of the tubes which, when in operation, emit a characteristic warm glow. Audiophile-grade Alps potentiometers provide smooth, precise rotation, while gold-plated speaker binding posts optimize signal transmission to the speakers.

Inside, the high-purity silver-plated copper wiring, special audio-grade capacitors, and carbon film resistors all reflect the care given to every detail. This meticulous construction contributes not only to the longevity of the unit, but also to its distinctive sonic character.

The magic of tubes: technology and performance

The heart of the CS-100A EL34 lies in its carefully orchestrated tube configuration. The amplifier uses eight EL34 tubes for the output stage, paired with one 6SN7 tube for voltage amplification, two 12AU7EH tubes for phase inversion and amplification, and two 12BH7EH tubes for the driver stages.

This complex architecture allows the Cayin to deliver impressive power for a tube amplifier: up to 2x80 watts in ultra-linear mode and 2x50 watts in triode mode. This generous power output gives it the ability to drive medium- to high-sensitivity speakers effectively, including some models that are known to be demanding.

The frequency response extends from 8 Hz to 75 kHz, going well beyond the human audible spectrum. This extension at both extremes contributes to the sense of ease and openness that characterizes the CS-100A EL34’s sound reproduction. The 92 dB signal-to-noise ratio ensures a perfectly silent background, allowing micro-details and the most subtle nuances to emerge.

A particularly welcome technical feature is the built-in bias voltmeter, which greatly simplifies adjustment of the power tubes’ bias. This function, usually reserved for top-of-the-line models, makes maintenance much easier and allows you to optimize tube performance throughout their lifespan.

Dual sonic personality: Triode and Ultra-linear modes

One of the most remarkable features of the Cayin CS-100A EL34 is its ability to operate in two distinct modes, thus offering two different sonic signatures from a single device.

In triode mode, the amplifier delivers a maximum of 2x50 watts. This mode favors a particularly textured and warm presentation, with a wide and enveloping soundstage. Timbres are reproduced with exceptional richness, voices gain in presence and emotion, and acoustic instruments benefit from striking naturalness. This mode is particularly well suited to acoustic, jazz, classical, or vocal music, where faithful timbre reproduction is more important than sheer power.

In ultra-linear mode, power increases to 2x80 watts, with greater extension in the bass range. While the musicality may seem slightly less velvety than in triode mode, it remains exceptional compared with a conventional solid-state amplifier. This mode provides more control, dynamics, and impact, making it particularly suitable for more energetic music or systems that require more power.

Unlike some previous models from the brand, several listeners have noted that the CS-100A EL34 often gives its best in ultra-linear mode, offering a more natural, rich, and solid sound than in triode mode. This characteristic, however, depends on the speakers used and personal listening preferences.

Generous connectivity and versatile use

The Cayin CS-100A EL34 stands out with particularly comprehensive connectivity that significantly broadens its range of applications. The amplifier provides three stereo RCA line inputs for connecting various sources such as a CD player, tuner, or turntable fitted with a phono preamp.

One of the most appreciated features is the presence of a direct stereo RCA line input (Pre-In), which allows the CS-100A EL34 to be used as a power amplifier. This function makes it possible to integrate the unit into a more complex system or to use an external preamplifier to refine the sonic signature even further.

On the output side, the amplifier is equipped with robust screw-type binding posts compatible with various types of speaker connectors. Dedicated subwoofer outputs complete the package, allowing you to extend low-frequency response if needed. The binding posts offer taps for 4 and 8 ohm impedances, thus optimizing matching with a wide range of loudspeakers.

The system remote control, manufactured entirely in-house by Cayin, lets you control the amplifier’s essential functions from a distance, adding a touch of convenience to everyday use.

Slightly angled close-up of a midnight blue metal rear panel, featuring gold-plated RCA connectors with white plastic rings labeled Subwoofer, black screws, and a red slider in a tube selection slot

A sonic signature that outperforms its price class

The Cayin CS-100A EL34 has been praised by many reviewers for sonic qualities that go far beyond what its price might suggest. Honored with the prestigious “Golden Ear Award”, this amplifier has often come out on top against much more expensive models in blind comparisons.

Right from the first listen, the CS-100A EL34 impresses with its ability to render the finest details, its exemplary clarity, and its characteristic smoothness. It builds a perfectly organized three-dimensional soundstage, with precise placement of instruments, even in the most complex compositions like large-scale symphonies. This ability to structure the soundstage is often a weak point of tube amplifiers, yet the Cayin excels in this area.

The amplifier is, however, sensitive to the quality of the power supply. Using a power conditioner can yield additional gains in definition, soundstage volume, and focus, without compromising dynamics. Likewise, the choice of output impedance (4 or 8 ohms) has a significant impact on the sound, particularly in the bass region.

While some listeners have noted that bass can sometimes lack a bit of depth and weight with certain speakers, this slightly lighter character in the extreme low end is offset by remarkable air, transparency, and fluidity in the midrange and treble. To balance the tonal response, speakers with a slight emphasis in the bass can form an ideal pairing.

Documentation

User manual

Technical Specifications

General Overview

Device type: integrated tube amplifier with dual mode (Ultralinear / Triode)
Operating mode: class AB
Tube protection cage

Audio Performance

Output power:
- 80 W + 80 W in Ultralinear mode (RMS)
- 50 W + 50 W in Triode mode (RMS)
Frequency response: 8 Hz ~ 75 kHz (-3 dB)
Total harmonic distortion: 1% (1 kHz)
Signal-to-noise ratio: 92 dB
Input sensitivity:
- 450 mV (integrated mode)
- 1300 mV (preamp input)
Input impedance: 100 kΩ
Output impedance: 4 Ω, 8 Ω

Tube Configuration

Power tube compatibility: KT-88 or EL34/EL family
Installed tubes:
- 8 × EL34 (output tubes, depending on configuration)
- 1 × 6SN7GTB (voltage amplification)
- 2 × 12AU7EH (phase inversion and amplification)
- 2 × 12BH7EH (driver and amplification)

Design and Components

Internal wiring: high-purity silver-plated copper
Volume control: Alps audio-grade potentiometer
Protection: soft-start circuit
Components:
- Audio-grade capacitors
- Carbon film resistors (low noise, high stability)
Transformers:
- 1 × toroidal for main power supply (low interference)
- 2 × wide bandwidth EI audio output transformers

Features

Dual amplification mode: Ultralinear / Triode selection to adjust sound signature
Integrated bias voltmeter: for easy adjustment of power tube bias
Robust chassis and premium finish, Cayin’s signature aesthetic
Easy output tube switching (KT-88 ↔ EL34), adaptable sound

Connectivity

Inputs: LINE1, LINE2, LINE3, preamp input (PRE-IN)
Outputs: subwoofer output (SUB OUT)

Physical Characteristics

Dimensions (W × D × H): 420 × 394 × 200 mm
Net weight: 29.5 kg

Electrical Specifications and Operating Conditions

Maximum power consumption: 480 W
Operating conditions:
- Temperature: 0 °C ~ 40 °C
- Humidity: 20% ~ 80%

Frequently Asked Questions

What is the sonic difference between Triode and Ultra-linear modes?

Triode mode (2x50W) offers a warmer, more textured, and more intimate sound, with a broad, enveloping stereo image. Timbres are particularly rich and natural. Ultra-linear mode (2x80W) provides more power, better bass extension, and tighter control, at the expense of a slight reduction in that characteristic warmth. The choice between these two modes depends on the music you listen to, the speakers used, and your personal preferences.

Can I replace the EL34 tubes with other models?

Yes, the Cayin CS-100A is designed to allow replacement of the EL34 tubes with KT88s, which alters the amplifier’s sonic signature. This operation requires a readjustment of the bias, made easier by the built-in voltmeter. Other tubes from the EL family (such as EL34L or certain 6CA7) can also be used, but it is recommended to consult the manual or a specialized dealer before making any changes.

Which speakers should I pair with this amplifier?

The CS-100A EL34 pairs best with speakers of medium to high sensitivity (87 dB/W/m or higher). To compensate for its slight tendency to lighten the extreme low end, speakers with good bass extension are recommended. The amplifier provides 4 and 8 ohm output taps to optimize matching with different speaker models. Brands such as Focal, Klipsch, Harbeth, or Spendor are often cited as harmonious partners.

Is it necessary to use a power conditioner with this amplifier?

While not essential, a power conditioner can significantly improve the performance of the CS-100A EL34, which has proven sensitive to power quality in tests. Gains in definition, soundstage volume, and focus have been observed without any loss of dynamics. If your electrical installation is subject to interference or if you are seeking ultimate performance, a quality conditioner is a wise investment.

User reviews

François

I hesitated between the different Cayin amp models.. I finally chose this model for its power (2x80 watts) and also because it has no bluetooth, no dac, etc... which would have duplicated functions...with my other devices.
The EL34 version is 500 euros cheaper than the KT88 version, so for the price of the CS-100A KT88 you can get the CS-100A EL34 and swap the tubes for KT88s, which allowed me to have two 'sets of 8 matched tubes'.
It comes standard with the following tubes:
8 EL34 JJ,
1 6SN7 Tung-SOL,
2 12AU7A/ECC82 Electro-harmonix
2 12BH7 Electro-harmonix.
With these stock tubes, after break-in the sound is already excellent, warm, clear, very natural.
For certain types of music, I was expecting a slight lack of bass and impact in the bass.
But, the advantage with this type of device is that you can do 'tube rolling', that is to say change the tubes in order to obtain the desired sound signature.
As planned, I ordered a set of 8 matched TAD KT88 red Base tubes in order to get round, deep bass with impact.
I also installed a "6SN7 NOS Sylvania chrome top green dot black plates USA 50s" which brings a lot of warmth and to finish I put in two "12AU7 RCA long black plates foil getter".
Fantastic result for listening to the music I love, namely blues, progressive rock and 70's rock (Wishbone ash, Point blank, Colosseum, Camel, Luther Allison etc...)
As for the finish, it's high-end, the knobs are solid, the aluminum front panel is superb, same for the remote control. I find the device aesthetically pleasing, and it's always a pleasure to remove the grille to reveal the tubes to guests, a bit like lifting the hood of an old car to show the engine.
As for power, the 2 x 80 Watts are more than enough to drive my Triangle Signature Delta speakers and I am truly delighted with my system, Thank you Franck!

Comment from March 13, 2026 — Experience from January 31, 2026

Automatically translated — Show original (French)

J'ai hésité entre les différents modèles d'amplis Cayin.. J'ai finalement opté pour ce modèle par sa puissance (de 2x80 watts) et aussi car il n'a pas de bluetooth, de dac etc... qui auraient fait double emploi...avec mes autres appareils.
La version EL34 est 500 euros moins chère que la version KT88, du coup pour le prix du CS-100A KT88 on peut avoir le CS-100A EL34 et changer les lampes pour des KT88, ce qui m'a permis d'avoir deux 'octets de 8 lampes appairées'.
Il est livré d'origine avec les lampes suivantes :
8 EL34 JJ,
1 6SN7 Tung-SOL,
2 12AU7A/ECC82 Electro-harmonix
2 12BH7 Electro-harmonix.
Avec ces lampes d'origine le son après rodage est déjà excellent, chaud, limpide, très naturel.
Je m'attendais pour certains types de musique à un petit manque de basses et d'impact sur les basses.
Mais, L'avantage sur ce type d'appareil c'est que l'on peut pratiquer le 'tube rolling', c'est-à-dire changer les lampes afin d'obtenir la signature sonore recherchée.
Comme prévu, j'ai commandé un lot de 8 lampes appairées TAD KT88 red Base afin d'obtenir des basses rondes, profondes avec de l'impact.
J'ai également installé une "6SN7 NOS Sylvania chrome top green dot black plates USA 50s" qui apporte beaucoup de chaleur et pour finir j'ai mis deux "12AU7 RCA long black plates foil getter".
Résultat fantastique pour ecouter la musique que j'affectionne à savoir blues, rock progressif et rock 70's (Wishbone ash, Point blank, Colosseum, Camel, Luther Allison etc...)
Pour ce qui est de la finition, c'est haut de gamme, les boutons sont solides la facades en alu superbe, idem pour la télécommande. Je trouve l'appareil esthétiquement plaisant, et c'est toujours un plaisir d'oter la grille pour devoiler les lampes aux invités un peu comme de soulever le capot d'une vieille voiture pour montrer le moteur.
Question puissance, les 2 x 80 Watts sont largement suffisants pour driver mes enceintes triangle signature delta et je suis vraiment ravi de mon systeme, Merci à Franck!

Eco-contribution included in the sale price.
Manufacturer reference: CAYCS100AEL34NR
GTIN / EAN: 695791490125