Stereo Amplifiers Waltham MA

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Sounds Good Corporation
(781) 890-8700
26 Fox RoadSte. 1
Waltham, MA
Services
Audio / Video, Home Automation / Systems Integration / Home Networking, Home Theater, Multi-Room Audio, Multi-Room Controls
Brands
Integra,Speakercraft,Boston Acoustics,Russound, Triad,Denon,Klipsch,LG,Sharp,Fujitsu,Ixos,Artison, Panasonic, Monster Cable, Draper, Viewsonic, Tannoy,Morell,Triad,Universal Remote Control,Salamander Designs,Control 4,Chief
Certifications
One or more employees at this company have achieved CEDIA Professional Certification status:- Robin McCune, CEDIA Certified Professional Designer, CEDIA Certified Professional EST II- Keith McDonald, CEDIA Certified Professional EST II- David Noland, CEDIA Certified Professional EST II- Nicholas Tam, CEDIA Certified Professional EST II

Custom Cable Services
(781) 935-0300
P.O. Box 6351
Lincoln, MA
Services
Audio / Video, Environmental Controls, Home Automation / Systems Integration / Home Networking, Home Theater, Multi-Room Audio
Brands
LG, Samsung, Parasound, Tannoy, Yamaha, Nuvo, Sphere, Triad, Crestron, Russound, Peerless, EAW, Mitsubishi, NEC, InFocus, RDL, NEVO, DaLite and Universal.
Certifications
One or more employees at this company have achieved CEDIA Professional Certification status:- Eric Sigman, CEDIA Certified Professional EST II- Robert Soluri, CEDIA Certified Professional EST II

Audio Video Design
(617) 965-4600
170 Needham Street
Newton, MA
Services
Home Audio, Design & Installation

Best Buy
100 Cambridgeside Pl
Cambridge, MA
 
Audio Concepts
(617) 734-1800
870 Commonwealth Avenue
Boston, MA
Services
Home Audio, Design & Installation

Best Buy
550 Arsenal St
Watertown, MA
 
Audio Lab
(617) 864-1144
Harvard Square 36 JFK Street
Cambridge, MA
Services
Home Audio, Design & Installation

Audio Video Designs
(617) 965-4600
170 Needham St.
Newton, MA
 
Best Buy
360 Newbury St
Boston, MA
 
Best Buy
401 Park Dr
Boston, MA
 

pass250

POSITIVE FEEDBACK ONLINE - ISSUE 6

pass labs

X250 stereo amplifier

as reviewed by Mark Katz

pass9.jpg (35267 bytes)

Photos taken by Dave Clark in his system

   

The Pass X250 is the 2nd from the bottom of the Pass X series amp line. The smallest is the not so small X150, at 150 watts/channel and at the top are the 1000 watt per monobloc X1000 amps. These amps succeed the excellent Aleph series. The X250 weighs in at 100 pounds, but can be carried by two people with the help of the rear mounted handles. The front has a circular power switch and an attractive blue glowing meter that I believe conveys how much current the amp needs to draw. Wing-like protrusions that can be used as handles surround the meter and the whole amp has a brushed silver look. The back of this rather hefty stereo amp sports both single ended and balanced inputs and clever, large binding posts that are very easy to hand tighten. The binding posts are good for spades, but can’t be used on bananas since there’s nowhere to plug them. Also on the back is the obligatory IEC receptacle for the power cord, and the main power switch. The amp’s operation is intuitive. The manual gives the Nelson Pass design philosophy of low noise, very low distortion, achievable with only 2 stages of amplification and low global feedback using "Supersymmetry" and balanced circuitry. His discussion of distortion minimization makes good reading – in the user’s manual http://www.passlabs.com/pdf/x250man.pdf . Of course, the proof is in the implementation

pass8.jpg (36466 bytes)

I unplugged the Kora Cosmos amps and plugged the Pass X250 directly into a dedicated 20 amp outlet using a fairly hefty Tiff power cord. The rest of the system used included a CEC TL1 transport with Marigo Signature digital interconnect into an Audio Magic modified Kora Hermes 192/24 tubed DAC, Kora Eclipse tubed preamp hooked together with Goertz Triode interconnects. The amp drove the JM Labs Mezzo Utopias, a fairly flat 4 ohm, efficient load through shot-gunned (one run on each terminal) Kimber 8TC. The low powered equipment was plugged into an API Powerwedge 116 II, with the preamp into a non transformer filtered outlet. The amp changed the character of my system. Gone was the seductive sound of the Kora Cosmos, in came POWER. The first thing I noticed was a sense of the music becoming more dynamic. On my speakers, it seemed effortless and amazingly energetic. It sounded as if the dynamics of the performances were brought closer to the original. With the possible exception of very high efficiency horn speakers, dynamics of the music reproduced is markedly diminished compared to the original. Many people deride this type of speakers for poor tonal balance and a honky, "cupped hand" sound and with a few exceptions, they’re right. Despite this they can convey lively dynamics that would otherwise be far more compressed on more "audiophile approved" speakers....

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