Low Stock Warning - Due to very high demand, we expect shortages of some products. Place your order today.

0

Your Cart is Empty

AHB2 Tri-Amp Setup - Ellery Coffman

by Benchmark Media Systems July 27, 2017 2 min read

AHB2 Tri-Amp Setup - Ellery Coffman

The following photos and system descriptions were provided to us by one of our customers, Ellery Coffman. He has put together an amazing system and has carefully treated his room with acoustic absorbers. Nicely done!

Home Theater Featuring Benchmark AHB2 Power Amplifiers

Home Theater Featuring 10 Benchmark AHB2 Power Amplifiers

Hi Rory,

Thanks again for your help.  For two speakers, it is truly unbelievable how real this tri-amp system sounds; it is nothing short of jaw dropping! It truly sounds better than the $200k+ setups I've heard in some of the high-end audio shops I've been to.

It took an entire weekend, but I built a rack by repurposing some shelves I made, rack mounted four of the AHB2's you sent, soldered custom length Canare star quad cables (after seeing John Siau's YouTube video), and also added the Neutrik speakon connectors you recommended.  I can't wait until I move to hear this in surround; it is going to be truly jaw dropping with the AIX tracks I have.  For each speaker: one AHB2 is used to drive the midrange and tweeter and one AHB2 drives the woofer.

System Details

The custom Windows 10 PC uses JRiver and RME's ASIO hammerfall driver.  It sends AES out from an RME HDSPe AES-32 sound card to the Xilica XD4080's AES input.  The Xilica does FIR filtering for the WF/MR/TW filters and the DAC that feeds the AHB2 amps.

Of course the passive crossovers were removed from the speakers as I am striving for best at any price sound...  and I think I'm there.  The only thing that might be better is using software based FIR filtering and buying a bunch of DAC3's!

Update October 2020

Updated Home Theater System - 2020

Since the original 2017 post, Ellery has made a number of upgrades to his already outstanding system:

  • Tri-amped center speaker
  • Five level-matched and time-aligned subwoofers
  • Water-cooled PC in custom chassis to match the AHB2 amplifiers.

His home theater now features 10 AHB2 power amplifiers.

In Ellery's words:

"I'm still very impressed with the amps. In fact, even three years later I still get goosebumps when listening to certain tracks."

Photos

All photos courtesy of Ellery Coffman

Room Treatments

Front, Side and Ceiling Room Treatments 

Rear Wall and Ceiling Room Treatments

 Home Theater Room Treatments

Rear of Room Showing Earthworks Measurement Mic at Listening Position

Rack Details

Home Theater Equipment Rack

Front Rack with Custom Water-Cooled PC (Upper Left Corner)

Custom Water-Cooled PC

Custom Water-Cooled PC

Heat Sinks on Water-Cooled PC

Heat Sinks on Water-Cooled PC

Home Theater Rack with 6 Benchmark AHB2 Power Amplifiers

Front Equipment Rack Featuring 6 AHB2 Power Amplifiers

Home Theater Equipment Rack with 4 AHB2 Amplifiers

Rear Equipment Rack Featuring 4 AHB2 Power Amplifiers

 

 

Rear of Main Equipment Rack

 

Front Equipment Rack (Before Adding Water-Cooled PC)

 



Also in Audio Application Notes

Listening vs. Measuring
Listening vs. Measuring

by John Siau November 09, 2020 8 min read

At Benchmark, listening is the final exam that determines if a design passes from engineering to production. When all of the measurements show that a product is working flawlessly, we spend time listening for issues that may not have shown up on the test station. If we hear something, we go back and figure out how to measure what we heard. We then add this test to our arsenal of measurements.

Benchmark's listening room is equipped with a variety of signal sources, amplifiers and loudspeakers, including the selection of nearfield monitors shown in the photo. It is also equipped with ABX switch boxes that can be used to switch sources while the music is playing.

Benchmark's lab is equipped with Audio Precision test stations that include the top-of-the-line APx555 and the older AP2722 and AP2522. We don't just use these test stations for R&D - every product must pass a full set of tests on one of our Audio Precision test stations before it ships from our factory in Syracuse, NY.

Read More
TAS interviews John Siau
TAS interviews John Siau

by Benchmark Media Systems November 06, 2020 2 min read

Paul Seydor of The Absolute Sound interviews John Siau, VP and chief designer at Benchmark Media Systems. The interview accompanies Paul's review of the LA4 in the December, 2020 issue of TAS.

"At Benchmark, listening is the final exam that determines if a design passes from engineering to production. But since listening tests are never perfect, it’s essential we develop measurements for each artifact we identify in a listening test. An APx555 test set has far more resolution than human hearing, but it has no intelligence. We have to tell it exactly what to measure and how to measure it. When we hear something we cannot measure, we are not doing the right measurements. If we just listen, redesign, then repeat, we may arrive at a solution that just masks the artifact with another less-objectionable artifact. But if we focus on eliminating every artifact that we can measure, we can quickly converge on a solution that approaches sonic transparency. If we can measure an artifact, we don't try to determine if it’s low enough to be inaudible, we simply try to eliminate it."

- John Siau

Read More
REL Subwoofers with AHB2 Power Amplifier
REL Subwoofers with AHB2 Power Amplifier

by John Siau November 05, 2020 3 min read

Many Benchmark customers are using their AHB2 power amplifiers with REL subwoofers. This application note shows how to connect one or two AHB2 amplifiers to one or two REL subwoofers using the speaker outputs on the back of the AHB2 amplifiers.
Read More