Radiotehnika S-20N bookshelf speakers
85 dB/W / 4 Ω · f3≈55 Hz (bass 5/10) · bookshelf, 2-way, 1×133 mm, port rear · slightly bright (spec.); energetic (spec.); load: medium; loud 4/10; detail 5/10 (spec.); away from wall; AVR: no · room 10–18 m² · entry
Instalment: Buy now, pay later: 0-0-10 at our expense
Delivery by: 2026-11-09
prices and stock as of 2026-11-05
Audiomania expert verdict
A compact, affordable bookshelf (133 mm Polyglass, silk tweeter in a horn-waveguide, 88 dB / 4 Ω) for rooms up to 20 m² and desks: it sounds “quite bright and dynamic”, with clean but modest bass (55 Hz). Tolerant of budget amplifiers (Premiera A1, RTM02 v2, Aiyima), but 4 Ω rules out receivers rated “6 Ω and up”. For electronic music add a subwoofer. AI draft, under review
Ask about Radiotehnika S-20N
Will it suit your amplifier or room, what else to buy, what to compare with.
In brief
Best if you are looking for:
- a first hi-fi system in a room up to 20 m² on a minimal budget — “a good option for the money” AI draft, under review
- desks and small rooms (6–12 m²): a specialist picked it for a desk in 6 m² AI draft, under review
- background and late-night listening — “fine details are clear… doesn't tire you late at night” AI draft, under review
- clean, articulate bass on bass guitar and funk — “the picture does not smear” AI draft, under review
- affordable amplifiers: Premiera A1, RTM02 v2, Aiyima A07 Pro, Denon PMA-520 — “tolerant of most amplifiers” AI draft, under review
Keep in mind:
- 4 Ω: not for receivers rated “6 Ω and up” (Yamaha RX-V4A, Onkyo TX-SR501); for a Yamaha R-S202 the specialist advises 8 Ω speakers AI draft, under review
- modest bass (55 Hz): “there, but doesn't pump”; one owner needed loudness compensation; for electronic music — add a subwoofer AI draft, under review
- sounds “quite bright”: brighter on top than the Alfa 1.01; one owner wanted more air up top AI draft, under review
- a foam plug sits in the port — remove it for normal use; rear port — 30–50 cm from the wall AI draft, under review
Product DNA
L079%A structured sound passport: every value carries a source and a confidence.
- Tonal balance
- slightly brightAudiomania specialist0.75
± 1
Alternative value
- neutral Audiomania specialist0.5
С нейтральным усилителем (Technics) — «нейтральный и сбалансированный звук»
- neutral Audiomania specialist0.5
- Delivery character
- energeticAudiomania specialist0.5
- Bass depth
- 5calculated1
- Bass control
- 6customers0.5
- Detail resolution
- 5Audiomania specialist0.75
- Plays loud
- 4calculated0.5
- Load difficulty
- 4/10 (medium)calculated0.5
- Drive difficulty
- mediumcalculated0.5
- Amplifier topology fit
- ideal: class A, class AB, class D, class G, hybrid; less suitable: single-ended tube, AV receivercalculated0.5
- AV receiver OK
- nocalculated0.5
- Subwoofer need
- music: optional; cinema: recommendedcalculated1
- Placement sensitivity
- 5calculated0.5
- Distance to rear wall
- 30–50 cm (min 20)calculated0.5
- Near-wall OK
- nocalculated1
± 1
Alternative value
- yes customers0.25
С заглушкой у стены — «даже с закрытыми дырками сзади бас звучит хорошо»
- yes customers0.25
- Cable gauge
- 2.5–4 mm² (min 1.5)calculated0.5
- Cable termination
- bare wire, banana, spade, pinspec sheet0.75
- Use scenarios
- ideal: Home stereo; good: Rooms under 12 m², Near-field desktop, Background listening; acceptable: Home cinema front pair, Long sessions, Quiet evening listening, Dense, fast music, TV sound; less suitable: Loud listeningcalculated0.5
- Optimal room area
- 10–18 m² (6–22)calculated0.5
- Tier
- entrycalculated1
- What else you need
- amplifier, speaker cable, stands, subwoofer (optional)calculated1
Sound profile
- Bass5/10calculated
too few models in the band for a percentile
- Detail5/10Audiomania specialist
too few models in the band for a percentile
- Soundstagenot yet auditioned
- Microdynamicsnot yet auditioned
- Emotionnot yet auditioned
- Analyticity5/10Audiomania specialist
too few models in the band for a percentile
- Versatilitynot yet auditioned
- Ease of drive7/10calculated
too few models in the band for a percentile
Scores are relative to other models of the same category and price band (under 30k ₽). An empty bar means not yet auditioned.
Sound character
The S-20N's delivery is “quite bright and dynamic”: brighter on top than the Alfa 1.01, which is “more neutral and softer”. With a neutral amplifier (Technics) the specialist hears “a neutral, balanced sound”. AI draft, under review[3]
Bass is clean but not plentiful: “every note reads… the whole bottom is tight and articulate”, yet “there, but doesn't pump”; one owner needed loudness compensation. Specialist: the Vita 2.04 and DALI Spektor 2 have more bass. AI draft, under review[4]
The midrange is “juicy (but not like on full-range drivers)”; the top — a silk dome in a horn: more detailed than a Microlab Solo 6 or Yamaha NS-6490, but “could use a little more air”. AI draft, under review[3]
At low volume — background and late night — “fine details are clear… doesn't tire you”; dense electronic music is “quite respectable for a bookshelf”, and with a subwoofer “superb”. AI draft, under review[2]
Use scenarios
Suits:
- desk and 6–12 m² rooms — a specialist approved a 6 m² desk AI draft, under review
- home stereo up to 18–20 m² with a budget amplifier AI draft, under review
- background and late-night listening AI draft, under review
- stereo “cinema” with a receiver rated for 4 Ω (check the rating) AI draft, under review
- electronic and techno — with an active subwoofer AI draft, under review
Less suited to:
- loud parties and large rooms — 85 dB/W, 133 mm, ≈ 98 dB max by rule AI draft, under review
- receivers rated “6 Ω and up” AI draft, under review
- deep-bass lovers without a subwoofer — “there, but doesn't pump” AI draft, under review
- wall mounting AI draft, under review
Technologies and construction
133 mm Polyglass woofer on a butyl surround
What it is: A Polyglass cone (glass + paper) — stiff yet light; butyl rubber surround; strong magnet system.
Practical benefit: “The driver's sound stays controlled and clean at high volume” — owner: “the whole bottom is tight and articulate… the picture does not smear”.
25 mm silk tweeter in a horn-waveguide
What it is: A 25 mm silk dome in a small horn-waveguide; neodymium magnet, ferrofluid in the gap.
Practical benefit: The horn “evens out the dispersion… improves the stereo image”; specialists: “more detailed on top” than a Microlab Solo 6, sounds “quite bright”.
Rear reflex port with a foam plug
What it is: The port fires from the rear panel and ships with a foam plug inside.
Practical benefit: “Remove the foam” for normal use; against a wall the plug prevents boom — “even with the holes closed the bass sounds good”.
Damped MDF cabinet, grille on fixings
What it is: A damped MDF cabinet; acoustically transparent grille on fixings (not magnetic).
Practical benefit: Solid build — owners: “assembled quite sturdily”; a caveat: the grille cloth is loosely stretched.
Crossover with minimal phase distortion
What it is: The crossover is designed for precise driver matching and minimal phase distortion.
Practical benefit: Coherent bands — owner: “overall… sounds balanced and tight”.
Amplifier requirements
Recommended power
143–453 W
143–453 W into 8 Ω is the sweet spot; 45–680 W acceptable
Practice band for 14 m² at average level: 50–84 W
R-AMP-POWER · 1.0.0+c1.0.0 · confidence 0.5
- Load difficulty
- 4/10 (medium)calculated0.5
- Preferred amplifier character
- No character preference yet — we recommend auditioning the pairing.
Suits:
- class A — ideal
- class AB — ideal
- class D — ideal
- class G — ideal
- hybrid — ideal
Note:
- push-pull tube — no data (minimum impedance not stated)
- single-ended tube — not recommended
- AV receivers not recommended: the load is below their comfortable 6–8 Ω
Calculator: is the amplifier enough
Recommended system connection
To get the most from the system we recommend:
Speaker cable
- Gauge
- 2.5 mm²
- Recommended length
- up to 8.7 m per channel
- Termination
- bare, banana, spade, pin
For 3 m per speaker at 2.4 Ω, 0.86 mm² is enough; the Audiomania standard is 2.5 mm². Radiotehnika S-20N has screw terminals: both bananas and bare wire fit.
R-CABLE · 1.0.0+c1.0.0
In stock now
1,050 RUB · in stock
Why
For 3 m per speaker at 2.4 Ω, 0.86 mm² is enough; the Audiomania standard is 2.5 mm². Radiotehnika S-20N has screw terminals: both bananas and bare wire fit.
429 RUB · in stock
Why
For 3 m per speaker at 2.4 Ω, 0.86 mm² is enough; the Audiomania standard is 2.5 mm². Radiotehnika S-20N has screw terminals: both bananas and bare wire fit.
9,690 RUB · in stock
Why
For 3 m per speaker at 2.4 Ω, 0.86 mm² is enough; the Audiomania standard is 2.5 mm². Radiotehnika S-20N has screw terminals: both bananas and bare wire fit.
Room placement
- Minimum distance to the rear wall
- 20 cm; recommended 30–50 cm
- Distance between speakers
- 2.2–2.5 m
- Toe-in
- 0–10°
- Recommended stand height
- ≈ 73 cm
- bass reflex
- rear
Radiotehnika S-20N: needs ≥ 20 cm from the wall (ideally 30–50), 2.2–2.5 m apart, toe-in 0–10°. Give the wall distance for an exact verdict.
R-PLACEMENT · 1.0.0+c1.0.0
- Near-wall placement
- nocalculated1
± 1
Alternative value
- yes customers0.25
С заглушкой у стены — «даже с закрытыми дырками сзади бас звучит хорошо»
- yes customers0.25
- Placement sensitivity
- 5calculated0.5
From the specialists' experience:
- The foam in the port is a plug: remove it for normal use, put it back when the speakers sit against the wall.[2]
- Do not wall- or bracket-mount — “no mounting points”; the table says “on a shelf, on a stand”.[2]
- A specialist approved a desk in 6 m² at 30 cm from the wall — near-field is within its reach.[1]
Compatible stands in stock
19,990 RUB · in stock
Why
Radiotehnika S-20N on Radiotehnika T6 (660 mm) puts the tweeter at 0.93 m — seated ear level (1 m). The 150×170 mm plate under a 170×275 footprint is stable; load 4.7 of 30 kg.
- Wharfedale ST1 speaker standsacceptable
22,539 RUB · in stock
Why
On Wharfedale ST1 the Radiotehnika S-20N tweeter sits at 0.86 m — 14 cm off ear level (1 m); acceptable, tilt or a pad if desired.
Recommended right now
over the 45-product sampleIn-stock, current models only; refreshed with prices (2026-11-05). Not indexed.
38,990 RUB · in stock
Why
Radiotehnika S-20N: 4 Ω nominal — Radiotehnika RTM01 is rated for loads from 4 Ω, compatible. Radiotehnika RTM01 delivers ≈100 W into 4 Ω; the practice band for Radiotehnika S-20N in 14 m² at an average level is 50–84 W. Adequate.
249,999 RUB · in stock
Why
Radiotehnika S-20N: 4 Ω nominal — Cambridge Audio EXA100 is rated for loads from 4 Ω, compatible. Cambridge Audio EXA100 delivers ≈171 W into 4 Ω against a 50–84 W practice band for Radiotehnika S-20N in 14 m² — the headroom that gives bass control and low-volume detail.
86,233 RUB · in stock
Why
Radiotehnika S-20N: 4 Ω nominal — Leak Stereo 130 is rated for loads from 4 Ω, compatible. Leak Stereo 130 delivers ≈65 W into 4 Ω; the practice band for Radiotehnika S-20N in 14 m² at an average level is 50–84 W. Adequate.
104,880 RUB · in stock
Why
Radiotehnika S-20N: 4 Ω nominal — AudioLab 7000A is rated for loads from 4 Ω, compatible. AudioLab 7000A delivers ≈121 W into 4 Ω; the practice band for Radiotehnika S-20N in 14 m² at an average level is 50–84 W. Adequate.
rules version 1.0.0+c1.0.0
Audiomania ready systems
Assembled by the rules from in-stock products around this model; prices as of 2026-11-05.
Optimal
- Speakers: Radiotehnika S-20N bookshelf speakers (this model)28,990 RUB
- Amplifier: Radiotehnika RTM01 network integrated amplifier38,990 RUB
- Speaker cable: Radiotehnika Volna SP2.5 Banana finished speaker cable9,690 RUB
- Stands: Radiotehnika T6 speaker stands19,990 RUB
Total: 97,660 RUB
Checks (10)
- R-ROOM-FITideal
- R-PLACEMENTno data
- R-SUB-NEEDoptional
- R-AMP-IMPEDANCEfits
- R-AMP-POWERadequate
- R-SOURCE-CHAINfits
- R-AMP-CHARACTERrisky
- R-TIER-FITbalanced
- R-CABLEfits
- R-STANDgood
Comparison with similar models
How it differs from KEF Q150 bookshelf speakers
Radiotehnika S-20N bookshelf speakers:
—
KEF Q150 bookshelf speakers:
- Sensitivity: 86 dB/W vs 85 dB/W
- Low-frequency limit: 51 Hz vs 55 Hz
- Nominal impedance: 8 Ω vs 4 Ω
- Height: 303 mm vs 342 mm
Radiotehnika S-20N and KEF Q150 are the same tier; they differ in character and in the figures below.
Full comparison →How it differs from Wharfedale Diamond 12.1i bookshelf speakers
Radiotehnika S-20N bookshelf speakers:
- Low-frequency limit: 55 Hz vs 65 Hz
Wharfedale Diamond 12.1i bookshelf speakers:
- Sensitivity: 88 dB/W vs 85 dB/W
- Nominal impedance: 8 Ω vs 4 Ω
- Height: 312 mm vs 342 mm
The sound difference is not confirmed by sources — specs only.
Radiotehnika S-20N and Wharfedale Diamond 12.1i are the same tier; they differ in character and in the figures below.
Full comparison →
Specifications
Main
- Sensitivity
- 88 dB (unspecified)
- Nominal impedance
- 4 Ω
- Low-frequency limit
- 55 Hz (-3 dB)
- High-frequency limit
- 20,000 Hz
- Power handling
- nominal: 40; peak: 90
- Ways
- 2
Construction
- Enclosure
- type: bass reflex; port position: rear; port count: 1
- Cabinet
- MDFAudiomania
- Wall-mount points
- noAudiomania specialist
- Finishes
- Black Ash
- Grille
- removable: yes, magnetic: noAudiomania
Drivers
- Bass drivers
- 1 × 133 mm, Polyglass (стекло + бумага), подвес из бутиловой резины
- Tweeter
- 25 mm, silk, waveguide
± 1
sources disagree
- 25 mm, silk spec sheet1
Строго по таблице (без звуковода)
- 25 mm, silk spec sheet1
- Tweeter height from base
- 267 mmcalculated
Connection
- Terminals
- one pair, screw
Dimensions
- Dimensions (W×H×D)
- 170 × 342 × 275 mm
Weight
- Weight
- 9.4 kg (per pair)
Box contents
- In the box
- Защитные сетки, Поролоновые заглушки фазоинвертораAudiomania specialist
- Warranty
- 24 months
Documents
FAQ
›The speakers are 4 Ω — will they work with my receiver (Yamaha RX-V4A, Onkyo TX-SR501) or a 6–8 Ω amplifier?
›There is foam in the port — a shipping plug, or do I listen with it in?
›Which amplifier should I buy? Do I need one at all if my turntable has a phono stage?
›Which cable — 1.5 or 2.5 mm² — and is it included?
›Do I need a subwoofer?
›How do they sound — describe the character?
›How does it differ from the Radiotehnika Alfa 1.01 and Vita 2.04?
›Can I hang them on a wall or bracket? How close to the wall?
›What is the power rating — total and per speaker?
›S-20N, KEF Q150 or Klipsch R-40M for 12 m² (rock, pop, jazz, 20 cm from the wall)?
›Does it need an amplifier?
Customer reviews
4.8 of 5 · 27 ratingsПавел С., Белгород · 2026-05-12Excellentverified purchase
Брал комплектом с rt rtm02 v2. Для небольшой комнаты хватает полностью. Звук чистый и даже с закрытыми дырками сзади бас звучит хорошо
Александр Л., Москва · 2026-04-18Excellentverified purchase
Хорошие колонки, выдают вполне неплохой звук при весьма скромных размерах. Отлично вписались в интерьер.
Виктор, Москва · 2026-04-18Excellentverified purchase
Приобрел для второй системы с ELAC Discovery AMP DS-A101-G просто для прослушивания фоном в основном плейлисты со Spotify. Много надежд не возлагаю. Первые впечатления хорошие, собраны достаточно крепко, особенно интересно выглядят грили из плотной ткани как на мягкой мебели, создаёт своеобразный уют. Мне трудно с чем то сравнивать, так как мало опыта, звук понравился, мелкие детали четкие, бас слышен хорошо, он есть, но он не "качает", а просто присутствует, это для меня плюс, так как это не напрягает если слушать фоном, особенно поздно в ночное время. Заглушки для фазоинвертора не понадобились, гудения нет. Во всяком случае в связке с данным усилителем. Буду смотреть как будет дальше.
Александр А., Холмск · 2026-04-15Excellentverified purchase
Очень понравились, как звучат. Выглядят неплохо. Не сильно большие. Не понравилось только, как ткань на грилях натянута, болтается.
Денис В., Кингисепп · 2025-04-25Excellentverified purchase
Надеялся на лучшее, ожидал худшего) Но колонки приятно удивили. Использую совместно с усилителем Aiyima A07 Pro.
Василий А., Пущино · 2025-03-29Excellentverified purchase
Отличные колонки, неделя использования - полет нормальный. Хороший вариант за свои деньги.
Елена Б., Самара · 2025-01-10Excellentverified purchase
Очень вежливый персонал. Оформили быстро. Доставили своевременно. Всем рекомендую!
Роман С., Санкт-Петербург · 2025-01-04Excellentverified purchase
Не ожидал что будет именно так звучать как мне нужно. Люблю послушать бас гитару в композициях. Brian Bromberg особенно Thicker Than Water, каждая нота читается, звучит бас прям как натурально. Низ весь четкий артикулированный и самое главное если динамичная игра типа слепа в фанке и тд. то картина не смазывается, очень четкая. Серединка сочная (но не такая как на широкополосниках) верх хотелось бы немного по воздушней. Хотя в целом как акустическая система в звучит сбалансированно и четко. 5+ Ивану Суркову за оперативность и общение. Забыл про дизайн, меня все устроило, скругленные углы смотряться шикарно ну и радиотехниковская надпись с АЧХ прям в тему. Вывод отличный звук со стильным дизайном (без претензий на хайЕнд).
+5
AI summary of customer reviews
Based on 13 customer reviews.Most often noted:
- good sound for the money, exceeded expectations AI draft, under review
- clean, tight sound from a small box; fits the interior well AI draft, under review
- happy with budget amplifiers: RTM02 v2, Aiyima A07 Pro, Denon PMA-520, ELAC DS-A101 AI draft, under review
Sometimes mentioned:
- modest bass — “doesn't pump”, loudness compensation needed AI draft, under review
- top could be airier; grille cloth is loosely stretched AI draft, under review
Audiomania expert opinion
The S-20N is Radiotehnika's most affordable bookshelf, and Audiomania specialists regularly pick it in the budget class: “of the rest, the best choice is the Radiotehnika S-20N” (vs Premiera DS-501 and Mission QX-1), “a more balanced and detailed sound” (vs KEF Q150 and Klipsch R-40M in 12 m²). AI draft, under review[2]
The character is “quite bright and dynamic”, with a Technics “neutral and balanced”. The next step within the brand is the Vita 2.04 (8 Ω): “definitely more detailed and bassier”, “a flatter midrange, textured bass, clean treble”. AI draft, under review[4]