Bryston 4Be (NRB) for sale. The “e” stands for engineering and was the early model of the NRB vintage before the NRB name was introduced. They are the same circuit wise, however there are a very small number of the “e” models produced according to Bryston’s James Tanner. This amp is in fantastic condition. The 3 blemishes it has are so minor they are barely visible. I tried to capture them on camera. It has never been used professionally like many of these were. It’s been my personal amp for a long time and I can say more than it’s “tested and working”. Everything works perfectly. Both channels are working equally and have no hum or noise. I’ve played music for 8-10 hours before and it never skips a beat. It’s never needed service since I’ve owned it and is frequently cleaned inside so it can efficiently dissipate heat. Comes with power cord. Selling because I finally upgraded to the latest 4B. Let me know if you have any questions. Thanks.

This is a reprint of an Audio Review from 1992! This review will have SPECS, COMMENTARY, DETAILS, and INFORMATION about the unit listed. You wont be dissapointed! A piece of Audio History! I have THOUSANDS more Ads and Reviews on my Ebay Store. Email with ANY questions, THANKS! -Search for any brand you like on the left side in my Store Search bar. I have almost every popular Audio brand! -Each Page is 8.5 by 11 -Shipping is $3 in the USA and $6 ANYWHERE else, I ship WORLDWIDE! Each additional item is only $1 more to ship! -As always, your satisfaction is GUARANTEED at Electronics Archives! If you are unhappy with any purchase, email and I will get you a resolution or a refund! -Email me with any questions, I put 10-20 new Ads and Brochures on my site EVERY DAY! THANK YOU! Powered by eBay Turbo ListerThe free listing tool. List your items fast and easy and manage your active items.

Bryston 4B NRB 2 Channel Power Amplifier W/ Rack Handles. Condition is pre-owned. It is in excellent physical condition and looks great. It is tested and working properly. There are only a few minor dings and scratches. I tried to show these in the photos. Heavy duty rubber feet have been attached to the bottom. Comes as shown with rack handles, power cord, and owners manual reprint. It will be carefully packed for shipping, insured, and will require adult signature on delivery. DESCRIPTION/SPECS: The Bryston 4B NRB is a stereo power amplifier that can deliver high-quality sound and performance. It is a class-AB2 solid-state amplifier that uses MOSFET output devices and dual toroidal transformers. It has a slim profile and weighs 42 pound. It also has a bridging switch that allows it to operate in mono mode, delivering twice the power into a single load. The Bryston 4B NRB can produce 250 watts per channel into 8 ohms, 400 watts per channel into 4 ohms, and 800 watts in bridged mode into 8 ohms. It has a very low total harmonic distortion of less than 0.01% at 250 watts, from 20 Hz to 20 kHz. It also has a high signal-to-noise ratio of 100 dB below full output. It has a wide frequency response of 0.5 Hz to 100 kHz, +/-3 dB. It has a damping factor of over 500 at 20 Hz, which means it can control the speaker movement very well. The Bryston 4B NRB is designed to be very reliable and durable. It has a 14-gauge steel chassis that protects the internal components from external interference3. It has a modular construction that allows easy servicing and upgrading. It also has a thermal protection circuit that prevents overheating and damage. The Bryston 4B NRB is a great choice for anyone who wants a powerful and refined amplifier that can reveal the most delicate details in the musical fabric, at the same time providing seemingly endless power reserves. It is suitable for driving various types of speakers, from bookshelf to floorstanding models. It can also be paired with other Bryston components, such as preamplifiers, DACs, and CD players, to create a complete audio system. The Bryston 4B NRB is a classic amplifier that has earned many praises and awards from audiophiles and critics alike.

Power Output: 250 watts/channel into 8 ohms, 400 watts/channel into 4 ohms, or 800 watts bridged mode into 8 ohms. Rated THD or IM: Less than 0.01% at 250 watts, from 20 Hz to 20 kHz. S/N: 100 dB below full output. Crosstalk: Below noise level, 20 Hz to 20 kHz at 250 watts. Slewing Rate: More than 60 V/µS; more than 120 V/uS in bridged mode. Power Bandwidth: From below 1 Hz to over 100 kHz. Damping Factor: Greater than 500 at 20 Hz, re: 8 ohms. Input Sensitivity and Impedance: 1.25 V for rated output, 50 kilohms. Dimensions: 19 in. W x 5 1/4 in. H x 15 1/2 in. D (48.3 cm x 13.3 cm x 39.4 cm). Weight: 38 lbs. (17.23 Kg)