Bryston4B SST2usedBryston 4B-SST2 Amplifier - Barely Used and Complete**Please click here to check out our newly launched SkyFi Audio website with additional items for sale** The original owner of this amplifier stated this specific example was purchased for a projec...2999.00

Bryston 4B-SST2 Amplifier - Barely Used and Complete [Expired]

no longer for sale

**Please click here to check out our newly launched SkyFi Audio website with additional items for sale**

The original owner of this amplifier stated this specific example was purchased for a project but ultimately never used. It looks brand new to us and comes with all of the original packaging, manual, power cable, etc. 

Best of all it includes the remaining period of its factory 20-year warranty!

This unit is equally suitable for your home or a studio, and should be able to power the most demanding speakers.  

Retail was over $4k so here's your chance at a great bargain.  Not sure of the exact age, but figure that at least 10 years remain for the warranty.  

Click here for a PDF copy of the Bryston 4B-SST2 Owner's Manual

The 4BSST2 is a dual mono design audio power amplifier with two channels of each. Each channel has switch selectable balanced and single ended inputs. Each channel also has switch selectable gains of 29dB(1v) or 23dB(2v). The 4BSST2 includes SoftStart power control circuitry to eliminate high inrush currents when A/C power is applied. The power-up or turn-on of the 4BSST2 may be activated by the push-button power switch on the front panel or via hard wired remote control voltage.

Design: Two-Channel Solid State Power Amplifier
Power Output: 300 Watts RMS x 2 into 8 Ohms/500 Watts per channel into 4 Ohms
MFR: 1Hz – 100kHz
Inputs: RCA Unbalanced, XLR Balanced
Input Impedance: 50k Ohms Unbalanced, 20k Ohms Balanced
THD+N: 0.003%
Dimensions: 5.25″H x 17.25″W x 19″D
Shipping Weight: 63 Pounds

4BSST2 TECHNICAL SPECIFICATIONS from the owners manual:
Power Output: 300 watts per channel into 8 ohms, 500 watts per channel into 4 ohms
Gain: 29dB position = 28.28V/V 23dB position =14.14V/V
Sensitivity: High: 1.0Vin = 100W out with an 8Ω load1.8Vin = 300W out with an 8Ω load Low: 2.0Vin = 100W out with an 8Ω load 3.6Vin = 300W out with an 8Ω load
Input Impedance: Individual mode: Single ended ≈ 60K Ohms
Balanced ≈ 20K Ohms
Bridged mode: Single ended ≈ 15K Ohms
Balanced ≈ 10K Ohms
IMD or THD + noise: < 0.005% 20Hz to 20kHz at 300 watts into 8 W
< 0.007% 20Hz to 20kHz at 500 watts into 4 W
Noise: Measured with input shorted, 20 Hz to 20K Hz.
>110dB below rated output 29dB gain (- 75 dBu)
>113dB below rated output 23dB gain (- 78 dBu)
Slew Rate: > 60 volts per microsecond
Power Bandwidth: < 1 Hz to over 100 kHz
Damping Factor: Over 500 at 20 Hz, ref. 8 ohms
Footprint: 17” version: 17”L x 16“D x 6.3”H
Shipping Weight: approx. 28.6 Kg (63 lbs)
Power Consumption & Heat Load:
At Idle: 170 Watts
Max. Heat Dissipation: 580 BTU/Hr.
2 channels @ 300W into 8 ohms: 1280 Watts
Max. Heat Dissipation: 2320 BTU/Hr.
2 channels @ 500W into 4 ohms: 2100 Watts
Max. Heat Dissipation: 3750 BTU/Hr.
Bridged @ 900W @ 8 ohms: 2040 Watts Max.
Heat Dissipation: 3890 BTU/Hr.

Our Testing Process for Amplifiers (Solid State) at SkyFi:

We start with a visual inspection of all internal components to make sure there are no signs of stress or aging. Capacitors are checked for telltale sings of bulging or leaking, resistors are checked for signs of overheating or cracking, and transistors are checked for signs of stress or damage. 

We then power up the unit carefully and run a simple 1k sine wave while monitoring the output on an oscilloscope for signs of distortion or noise. Finally, we run the amplifier to its full rated power into the appropriate resistive load provided by our Sencore amplifier tester. If there is an issue, it will usually be noticeable at this point. If everything reads clean, we will often test for THD (Total Harmonic Distortion) measured by our Keithley distortion meter, and compare it against the original manufacturers specifications. The amplifier then remains powered on to "burn in" on our test bench for a few hours to make sure there are no heat related issues. If there are balanced inputs available they will be also be tested.

Final testing involves pushing actual music thorough the amplifier. We've learned over time that some issues are only noticeable to a trained ear while listening to familiar source material. Our test bench has reference vintage Kef speakers that we're very familiar with which quickly reveal any discrepancies. Some amplifiers will then move into our listening room where they are tested with our in-house reference speakers of choice.

Thanks for looking and please click here if you would like to receive a list of the equipment we receive from time to time.  We promise not to bombard you with junk email.



This item will be professionally packaged and insured for safe transit to your home. 

Please click here for detailed specifics regarding our specialized packing process that separates us from the rest.

If we don’t have the original manufacture's packaging, we use heavy duty double ply corrugated boxes with Instapak expanding foam custom inserts.  In many cases this has proven to be better than the original packaging.  We also use high quality fiber reinforced tape to seal our packages.  Lightweight items will be bubble wrapped and shipped in a high-quality box. 

This item is available for pickup in Glen Rock with convenient parking near our building.

NJ Residents or anyone picking up without a resale certificate will need to pay NJ Sales Tax.

Use the Buy It Now button and we will cover the PayPal fees.

Thanks for looking and be sure to call us at 201-879-0000 with any questions. 

Please also click here to visit our Audiogon store to see the rest of the items we have for sale.



SkyFi Audio is a small startup business specializing in the purchase, reconditioning, and reselling of select high-end audio equipment.  We only buy equipment the we admire and are passionate about. No mid-fi, no gimmicks, no junk. 

Each piece of equipment is cosmetically restored and fully tested in our well-equipped lab by an engineer with 30+ years of experience in the HiFi world. If it does not meet or exceed the original manufactures specifications, it will not be sold.  We are very selective about the equipment we purchase, focusing on mostly analog, high-build quality, American, and European built units.

Through our sister company, which is an authorized dealer for McIntosh, Audio Research, Sonus Faber, ClearAudio, Pro-Ject Audio Systems, and Sony ES, we have access to OEM parts, service, and support.  If you are local and looking for new equipment from the above-mentioned manufacturers, please drop us a line as we can arrange both sales and professional installation in the tri-state area.


We do not accept or review any offers that do not go through the official Audiogon system. We have too many items for sale and it’s nearly impossible to keep track of offers outside of the official system. Please don’t message, email, or text any offers. 

If you do not see a “Make an Offer” button, it means we are not considering any offers on that item.   


We prefer working through PayPal which allows you to use a credit card or bank transfer. We do not charge extra for any payment fees if you purchase the item at the asking price.  You can also send us a personal check (which will need to clear before shipping), certified check, money order, or wire transfer. International clients without access to PayPal should use a bank wire transfer. 

If you are picking up an item we do not accept PayPal.  You must pay in person with cash, certified or bank check, or wire transfer.  If you make a PayPal payment and are picking up the item, it will be returned. 


We accept trade-ins of equal or lesser value under certain conditions.  Simply ask and let us know the exact model, condition, and the accessories that are included (such as the original box, remote, cables, manual, etc.).  We will only consider high-end equipment from mainstream manufacturers such as McIntosh, Mark Levinson, Audio Research, Krell, etc. and will typically pass on displays, projectors, receivers, dated surround processors, and mid-fi equipment of any type.  We will offer a fair value for your equipment, but keep in mind we are running a business and will need to be able to resell the equipment at a profit after investing a great deal of time and resources in testing, certifying, repairing, cleaning, and packaging the incoming equipment.  If you are looking for top dollar we suggest attempting to sell it directly to an end user on your own.

SELL US YOUR GEAR (Working or Broken)

We will also purchase your used or broken gear and arrange pickup if you are in our local market. Just drop us a note for a quote but be sure to include the condition and what is included. 

HOW TO VISIT US                                                                                                        

We are currently operating from our shop located in Glen Rock, NJ.  You are welcome to make an appointment if there is a piece of equipment you would like to see in operation before or after purchase.  We have a well-equipped, dedicated listening room with tons of equipment of all makes and models.  We are not a store, so please don’t make an appointment if you are just curious as to how a speaker or piece of equipment sounds.  In essence, no tire kickers please.

You can call 201-879-0000 with any questions or to schedule an appointment.  We can also arrange to install, calibrate, and tune the gear in your listening room if you’re local to our area.  This is super useful when purchasing large speakers or heavy amplifiers.  It’s also great for ensuring your new turntable is setup correctly in its final resting place.  



member since December 2000

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