Bryston 4B³ Cubed Series Dual-mono 2-channel Audio Power Amplifier

BRYSTON

€8690,00
(16 reviews) Write a Review
SKU:
BRSTN4B
Availability:
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Power output:
2x 300W @8Ω | 2x 500W @4Ω
Inputs:
XLR | RCA | 6,3mm (1/4) Jack"
Construction:
Dual mono balanced power amp, Patented Salomie ultra linear input stage
Audio channels:
2
Rack mount:
19 PRO version with rack mount holes & variable gain regulation (black finish only) available on special request"
Warranty:
20 Years
Selected Finish is
Selected LED color (standard is green) is
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A rarified few components in audiophile lore have become so ubiquitous that nearly every music lover once had, lusted after, or if they're really lucky, currently owns one. One such legend is the Bryston 4B. This product has been manufactured continuously (though often refined) since 1978. Currently this venerated amplifier is on its 6th generation, and it's never been better. Now rated at 300 watts per channel into 8 ohms, (and upwards of 500 into 4 ohms), this true dual-mono amplifier is powerful enough for practically any speaker, yet it's priced to remain within reach. The degree of clarity, power, nuance, and outright truthfulness of this amp is stunning. If you've always wanted one, maybe now is just the right time.

4b3-silver-17-oblique-top-flagged-alt-color-web-edited.jpg

Features

  • Balanced XLR and Single ended RCA input
  • 2 Channels each with fully independent power supplies including transformers
  • 300W into 8 ohms (and up to 500 into 4 ohms) per channel
  • The patented Salomie circuit found in all Cubed Series amplifiers
  • Two step switchable gain 23dB or 29dB (no fully variable gain regulation trimmers)
  • Fully convection cooled means no noisy fans
  • Machined and anodized aluminum enclosure and dress panel
  • Less than 500mW standby power consumption
  • SoftStart microprocessor controlled startup sequence won't trip circuit breakers
  • DC trigger for automated turn on and turn off
  • Legendary Bryston 20 Year Warranty

Options

  • Silver or black faceplate
  • 17” or 19” faceplate (non-rack mountable) 19" comes with front mounted handles
  • PRO version includes 19" rack mount dress panel in black plus rear panel channel trim pots (-14 to 0dB)

Reviews

 

 

  • Awarded for Exceptional Value (Doug Schneider, SoundStage!HiFi) Read Review...
  • A well-designed solid-state amplifier should fulfil the purest principles of music reproduction, accepting the input signal, then transparently and harmlessly delivering it to the transducers regardless of their inherent electrical demands, providing effortless and tight control of the drivers while manifesting boundless dynamic expression, detailed resolution and accurate tonality. In the 4B³, Bryston has covered all these bases covered... for at least 20 years. (Edgar Kramer, Audio Esoterica) Read Review...
  • I heard sound that was at once brawny and precise, yet very subtle and refined when the music required it. I’ve said similar things about various amplifiers in the past, but the Bryston was truly remarkable in how it sacrificed little, if any, power output while retaining an extremely sophisticated and nuanced sound that I hadn’t thought possible...  (Roger Kanno, Soundstage!)  Read Review...
  • The latest 4B3 is a masterful and superbly executed amplifier, if you are looking for control, extension, evenness and a whole lot of listening fun it should be very high on your must hear bucket list. I will be very sorry to see it go.  (Jason Kennedy, The Ear)  Read Review... 
  • Bryston's design team appears to have met its stated goal of delivering an overall neutral and natural presentation by ensuring an essentially neutral power response. I liked the sound of the amps so much I requested a review sample of the new 4B Cubed stereo model.  (Maurice Jeffries, Postive Feedback) Read Review...  
  • I actually think that the Bryston 4B³ overall is one of the best amplifiers currently on the market.  (Martin Mertens, Fair Audio)  Read Review...  
  • If you ask about my individual and very subjective opinion, then the Bryston 4B3 seems to be the summit not only of my audiophile, but also my reviewers dreams.  (Jacek Pazio, Sound Rebels) Read Review...  
  • In the STEREO listening room, the Brystons unleashed a kind of unbelievable elemental force, whose pronounced rhythm, texture, and subtlety amaze on closer inspection.  (Tom Frantzen, Stereo Magazine)  Read Review...  
  • So nicely powerful, and its timbre so rich and sonorous that it can be difficult to switch to another amp after listening to a few tracks... Bryston’s latest Cubed series really has taken the sound to a whole new level.  (Christiaan Punter, HFA)  Read Review...  
sshifi_recref
  • The Bryston 4B3 is a top-shelf amplifier that can be considered a benchmark for performance and value -- and a natural addition to our list of Recommended Reference Components.  (SoundStage! Hi-Fi)  Read Review...  
  • Yes, it’s endowed with muscle; it is quick, dynamic, transparent, and has an iron grip of the frequency extremes but what makes the 4B³ most special is its finesse – able to conjure subtleties that engender realism.  (George de Sa, NOVO)  Read Review...  
  • All that said, is the Bryston 4B3 amplifier the best 4B amplifier of all times? Yes, it is that without a doubt according to my opinion! Above and beyond that it is one of the best power amplifiers that one can purchase for love or money.  (Staff Writter, Fidelity Online)  Read Review...  
  • The sonic advances achieved with the new input stage have resulted in a singularity of sorts. This damn thing has perhaps the sweetest, purest top end I have ever encountered in a solid state amp at anywhere near the price (and way beyond), and a tonal finesse that rivals a fine modern tube amp, especially from the mid-bass and into the lower treble. Coupled with the amp's iron-fisted bass range and superbly low noise floor — a combination which allows micro and macro dynamic nuances to shine unimpeded — and you have one helluva performer.  (Maurice Jeffries, Positive Feedback)  Read Review...
  • The latest 4B³ is a masterful and superbly executed amplifier, if you are looking for control, extension, evenness and a whole lot of listening fun it should be very high on your must hear bucket list. I will be very sorry to see it go.  (Jason Kennedy, The EAR)  Read Review...
  • The 4B Cubed is one of the few amplifiers of which I know where careful listening and a good system set-up can transport one from the doldrums of merely good to the rank of excellence.  (Ernie Fisher, The Inner Ear Magazine)  Read Review...  
  • These dig right to the heart of the music and result in one of the best all-round power amplifiers I have encountered at the price.  (Adam Smith, Hi-Fi News & Record Review)  Read Review...  
  • In the STEREO listening room, the Brystons unleashed a kind of unbelievable elemental force, whose pronounced rhythm, texture and subtlety amaze on closer inspection.  (Tom Frantzen, STEREO)  Read Review...  

Specifications

 
Dimensions Inches: 17 or 19 W x 6.3 H x 15.5 or 17.75 (with front handles) D
Weight 42 lbs | 19 kg
Frequency Response: <1Hz - 100kHz: -3dB
THD+N (20Hz-20kHz @ Rated Power, 8Ω): <0.005%
Power Output (per channel): 300W @ 8Ω | 500W @ 4Ω
Noise: RCA: -112dB
  XLR: -117dB
Input Impedance: Unbalanced 7.5kΩ
  Balanced 30kΩ+ / 6kΩ-

 

Download Brochure
Download Manual
20 Year Warranty

16 Reviews Hide Reviews Show Reviews

  • 4
    Bryston 4B3

    Posted by Adam Smith - Hi-Fi News & Record Review 2016/6 on 11th Mar 2021

    These dig right to the heart of the music and result in one of the best all-round power amplifiers I have encountered at the price.

  • 4
    Bryston 4B-3: Bryston Expands the Square

    Posted by Ernie Fisher - The Inner Ear Magazine on 11th Mar 2021

    The 4B Cubed is one of the few amplifiers of which I know where careful listening and a good system set-up can transport one from the doldrums of merely good to the rank of excellence.

  • 5
    Bryston 4B3

    Posted by Jason Kennedy - The EAR on 11th Mar 2021

    The latest 4B³ is a masterful and superbly executed amplifier, if you are looking for control, extension, evenness and a whole lot of listening fun it should be very high on your must hear bucket list. I will be very sorry to see it go.

  • 5
    Heavy Metal Fantasies: The Beautiful Bryston Limited 4B³ Stereo Power Amplifier

    Posted by Maurice Jeffries - Positive Feedback 2016/9 on 11th Mar 2021

    The sonic advances achieved with the new input stage have resulted in a singularity of sorts. This damn thing has perhaps the sweetest, purest top end I have ever encountered in a solid state amp at anywhere near the price (and way beyond), and a tonal finesse that rivals a fine modern tube amp, especially from the mid-bass and into the lower treble. Coupled with the amp's iron-fisted bass range and superbly low noise floor — a combination which allows micro and macro dynamic nuances to shine unimpeded — and you have one helluva performer.

  • 5
    SPOTLIGHT BRYSTON 4B CUBED

    Posted by Staff Writter - Fidelity Online 2017/1 on 11th Mar 2021

    All that said, is the Bryston 4B3 amplifier the best 4B amplifier of all times? Yes, it is that without a doubt according to my opinion! Above and beyond that it is one of the best power amplifiers that one can purchase for love or money.

  • 5
    Bryston 4B3 (Cubed Series) Amplifier Review

    Posted by George de Sa - NOVO 2016/6 on 11th Mar 2021

    Yes, it’s endowed with muscle; it is quick, dynamic, transparent, and has an iron grip of the frequency extremes but what makes the 4B³ most special is its finesse – able to conjure subtleties that engender realism.

  • 5
    Hegel Music Systems Axiom Rotel 270x270 Bryston BR20 (202010) PMC Fact KEF LS50 META EISA Awards Sponsor Logos Logo Monitor Audio - June 2017 SV Sound Logo Simaudio Logo Hegel Logo Bryston Logo Roksan Audio - April 2018 Logo Magico Logo Crystal Cabl

    Posted by SoundStage! Hi-Fi on 11th Mar 2021

    The Bryston 4B3 is a top-shelf amplifier that can be considered a benchmark for performance and value -- and a natural addition to our list of Recommended Reference Components.

  • 5
    Bryston 3B, 4B and 14B “Cubed” power amplifiers

    Posted by Christiaan Punter - HFA 2017/12 on 11th Mar 2021

    Bryston's design team appears to have met its stated goal of delivering an overall neutral and natural presentation by ensuring an essentially neutral power response. I liked the sound of the amps so much I requested a review sample of the new 4B Cubed stereo model. Maurice Jeffries Postive Feedback Awarded for Exceptional Value Doug Schneider SoundStage!HiFi A well-designed solid-state amplifier should fulfil the purest principles of music reproduction, accepting the input signal, then transparently and harmlessly delivering it to the transducers regardless of their inherent electrical demands, providing effortless and tight control of the drivers while manifesting boundless dynamic expression, detailed resolution and accurate tonality. In the 4B³, Bryston has covered all these bases covered... for at least 20 years. Edgar Kramer Audio Esoterica I heard sound that was at once brawny and precise, yet very subtle and refined when the music required it. I’ve said similar things about various amplifiers in the past, but the Bryston was truly remarkable in how it sacrificed little, if any, power output while retaining an extremely sophisticated and nuanced sound that I hadn’t thought possible... Roger Kanno Soundstage! The latest 4B3 is a masterful and superbly executed amplifier, if you are looking for control, extension, evenness and a whole lot of listening fun it should be very high on your must hear bucket list. I will be very sorry to see it go. Jason Kennedy The Ear I actually think that the Bryston 4B³ overall is one of the best amplifiers currently on the market. Martin Mertens Fair Audio If you ask about my individual and very subjective opinion, then the Bryston 4B3 seems to be the summit not only of my audiophile, but also my reviewers dreams. Jacek Pazio Sound Rebels In the STEREO listening room, the Brystons unleashed a kind of unbelievable elemental force, whose pronounced rhythm, texture, and subtlety amaze on closer inspection. Tom Frantzen Stereo Magazine So nicely powerful, and its timbre so rich and sonorous that it can be difficult to switch to another amp after listening to a few tracks... Bryston’s latest Cubed series really has taken the sound to a whole new level.

  • 5
    O, Canada!

    Posted by Tom Frantzen - Stereo Magazine 2018/4 on 11th Mar 2021

    In the STEREO listening room, the Brystons unleashed a kind of unbelievable elemental force, whose pronounced rhythm, texture, and subtlety amaze on closer inspection.

  • 5
    BRYSTON 4B³ ENGLISH VER.

    Posted by Jacek Pazio - Sound Rebels on 11th Mar 2021

    If you ask about my individual and very subjective opinion, then the Bryston 4B3 seems to be the summit not only of my audiophile, but also my reviewers dreams.

  • 5
    Bryston BP17³ and Bryston 4B³ | Before-end combination

    Posted by Martin Mertens - Fair Audio on 11th Mar 2021

    I actually think that the Bryston 4B³ overall is one of the best amplifiers currently on the market.

  • 5
    Latest Bryston 4B 3

    Posted by Jason Kennedy - The Ear on 11th Mar 2021

    The latest 4B3 is a masterful and superbly executed amplifier, if you are looking for control, extension, evenness and a whole lot of listening fun it should be very high on your must hear bucket list. I will be very sorry to see it go.