Boulder 2100 Series

World famous. World renowned. The Boulder 2100 Series continues to dominate high-performance audio.

Boulder 2120 Digital-to-Analog Converter

Boulder 2108 Phono Preamplifier

2108 — Phono Preamplifier

• Three pairs of balanced inputs allow connection to three different turntable, tonearm, or cartridge combinations at the push of a button, without any reconfiguration

• Fully-balanced circuitry rejects noise and keeps the delicate signal from a phono cartridge in balanced mode, maintaining balanced operation throughout and eliminating noise that would otherwise obscure critical musical information

• Entirely separate power supply chassis houses four independent power supplies: left audio, right audio, control, and standby, for total isolation of all supplies from the sensitive analog audio circuitry

• Standard RIAA equalization as well as EMI, FFRR (London/Decca), and Columbia EQ selections enable proper playback of collectible records made prior to 1955

• Modular and discrete Boulder 995S phono gain stage is exclusive to the 2108, hand-manufactured and calibrated to spec in a potted and precision-machined housing

• Non-resonant and expertly machined casework protect the delicate analog signal from microphonic and resonant distortions

• Customizable Personality Cards for each input to match the exact individual needs of various phono cartridges: MM, MC, resistive and capacitive loading, high or low gain, and demagnetizing

• Switchable outboard demagnetizer pass-through connections for use with specific MC phono cartridges

• Front panel selectable, three-setting low-cut filter removes turntable rumble or low frequency noise from warped records

Boulder 2110 Preamplifier

2110 — Preamplifier

• Balanced version of Boulder’s analog discrete step volume control is programmable for 0.1, 0.5, and 1.0 dB steps

• Four separate chassis: left audio, right audio, user interface, and power supply to isolate the analog channels from supply, control, and display noise

• Large, easy-to-read, dot matrix LED display

• Six pairs of programmable, differentially-balanced inputs

• Three pairs of balanced outputs for bi- and tri-amplified systems or powered subwoofers

• Cut mirror glass display window to match the hand-polished stainless steel buttons and volume control

• Separate power supply chassis houses three independent power supplies: analog left, analog right and control functions

• Every input can be custom named and configured for user preferences

• Auxiliary outputs are programmable to feed secondary systems or recording devices

• Uses 12 high-current output 993S gain stages, a discrete and modern version of the 990 gain stage used in broadcast and recording studios world-wide

• Boulder Link and 12V trigger for use with external control systems

• Each input can be configured for Theater Mode when used in home cinema installations

2120 Digital-to-Analog Converter

2120 — Digital-to-Analog Converter

• Large 12.3″ (31.2 cm), full-color, easy-to-read LCD display

• Decodes MP3, FLAC, xFLAC, WAV, xWAV, ALAC (Apple Lossless), AIFF, OGG Vorbis, and DSF (DSD 1x and DSD 2x) music files

• Supports all common digital data rates and resolutions

• Accepts streaming (USB and UPnP/DLNA Ethernet) and traditional (HDMI, Toslink, S/PDIF and AES3) digital input connections

• Artist, track name, album name, cover art and file type information is displayed when available during streaming

• Internal volume control for direct connection to amplification

• Plays online audio and video services such as Tidal, Spotify, Netflix or YouTube via HDMI inputs, including video throughput

• Four isolated chassis: left audio, right audio, user interface, and power supply

• Full selection of optional digital input modules can be chosen to fit any system needs

• Comprehensive function and display setup modes to tailor the 2120 to the user’s preferences

• Dual standby modes (normal and low power options) to meet all energy efficiency requirements

• Uses 20 fully-discrete 993S gain stages, a modern descendent of the 990 gain stage used in broadcast and recording studios world-wide

• Automatic software updates when linked to an active Internet connection

• IR remote and networked IP control for use in stand-alone systems or fully integrated homes

• Differentially balanced version of Boulder’s Precise Interval Clock to eliminate jitter and maintain ultra-precise data timing at the DACs


2120 Digital-to-Analog Converter

2150 Mono Power Amplifier

2150 — Mono Power Amplifier

• Boulder’s most powerful continuously manufactured amplifier: 1000W into any load

• Computer designed surface-mount circuit boards secured in custom-machined frames, each damped to eliminate mechanical distortion

• Dual toroidal transformers, potted and installed in a welded steel enclosure: transformer hum is not permitted

• Boulder Link for turn-on and turn-off of amplifiers and to send status messages to the display of any Boulder preamplifier

• 12V trigger connection for remote turn-on by most surround-sound processors and control systems

• Two 99H2 gain stages (one for + audio and one for – audio), a third-generation descendent of the 990 gain stage used in recording and broadcast studios world-wide

• Supervisor board monitors and controls all aspects of the amplifier’s operating status

• Dual gain stage design maximizes bandwidth by incorporating the majority of gain in the first stage

• Designed as a fully-balanced, true monaural amplifier for ideal loudspeaker interface

• Full Class-A biasing actively managed with an analog circuit that reduces heat and improves efficiency

• Massive instant power delivery and damping from 80 bipolar output transistors

• Dual speaker connections via easy to connect, high-current speaker terminals to accommodate bi-wired loudspeakers


Boulder 2160 Stereo Amplifier

2160 — Stereo Amplifier

• Bias operation is Class-A to full rated output power and managed with an analog circuit that minimizes heat and power consumption

• Boulder’s most powerful, continually produced stereo amplifier: 600W per channel

• Surface-mount circuit board design minimizes connection resistance and lead inductance

• Non-resonant chassis carved from solid blocks of aluminum on Boulder’s own CNC machining centers

• Four fully-discrete 99H2 gain stages, potted and housed in machined shells for thermal stability and shielding

• Two massive transformers are filtered, potted, and enclosed in a welded steel case

• Power cycling, turn on sequencing, and status messages sent to Boulder preamplifier displays via the Boulder Link communication system

• 12V trigger connection for remote turn-on and use with most surround sound processors and external control systems

• Supervising microprocessor circuitry controls and monitors protection systems, and the turn-on and turn-off of any linked amplifiers

• Dual stage design incorporates the majority of gain in the first stage to maximize bandwidth and minimize distortion

• Two pairs of speaker connections per channel to accommodate bi-wired loudspeakers

• Fully-balanced design from the inputs to the outputs substantially reduces distortion and noise


boulder 2100 series

The Audio Salon | Santa Monica,‎ CA‎ | 310-863-0863