Serving the Greater Bay Area

Services

Precision tuning for audiophiles and home theater enthusiasts who demand the best their system can offer.

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Acoustic measurement microphone and RTA analysis setup
Acoustic Analysis
Room Measurement & Placement
Marantz and Anthem receiver calibration with measurement microphone
System Calibration
Bespoke Equalization Profiles
Vintage speaker driver refoaming and crossover restoration
Speaker Restoration
Refoaming & Crossovers
Home theater and household audio visual electronics setup
General Audio Visual Setup
Home Theater & Household Electronics
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The Process

A repeatable calibration workflow that delivers consistent, studio-grade results at home.

Physical Audit & Placement

I evaluate room dimensions, speaker geometry, seating positions, and acoustic boundaries, then time-align the speakers to lock in a proper phantom center and prevent phase cancellation before digital correction begins.

Laser distance meter and speaker stands for placement planning
Measurement microphone with laptop running REW multi-point sweeps
OMNI MIC v2

Advanced Multi-Point Measurement

Using OmniMic RTA and REW, I capture dense listening-area data to map modal behavior, time-domain anomalies, and channel balance.

Additional REW analysis view for advanced multi-point measurements
AV processor setup screen showing custom house curve configuration

Software Optimization & House Curve Tailoring

Using REW I apply target curves and create bespoke EQ profiles for your system. Correction stays under 500 Hz with wide filters, so room issues get cleaned up without rewriting the natural sound of your speakers.

Additional software optimization measurement view for house curve tailoring

Final Verification & Client Review

We validate performance with final sweeps and listening references, then review settings together so you know exactly how to preserve and enjoy your calibrated system.

Drag the slider left and right to compare before and after calibration.

Room response before EQ calibration (reference measurement)
Room response after EQ calibration (final verification)
Before
After

EQ Profile Deployment & System Handoff

The final step is an A/B listening session of the equalization profile onto your own hardware, loaded via Equalizer APO, miniDSP, or a supported AVR.

Signal chain showing Equalizer APO, miniDSP, and Audyssey or Dirac AVR connected to a laptop for EQ profile deployment

Pricing

Final quotes depend on room size, gear, and travel within the Greater Bay Area.

General Room Treatment & Filter Creation

From $150

Room measurement, placement guidance, target curves, and bespoke EQ profiles for your system.

Speaker Restoration

Quote after inspection

Disassembly & Inspection, Refoaming, Driver replacement, Crossover repair.

General AV Setup

From $150

Internet, cable, home theater, and household electronics support.

About

Peak and Null Audio — independent consulting focused on measurable performance and musical realism.

Portrait of Henry Holland Merry, lead acoustic engineer

Henry Holland Merry

Lead Engineer

Workshop gallery

My journey in hi-fi audio started in middle school, when I first discovered the joy of tuning the world out with earbuds. In high school I made a discovery. Lying on the floor next to my CD player, I plugged in my Sony over-ear headphones and was absolutely floored at how good they sounded.

It never sounded this crisp and clear connected to my phone I thought. From here I fell down the headphone rabbit hole, ending my search after picking up a pair of Sennheiser HD 650s. Warm, wide, and just plain pleasing to listen to.

I swapped different headphone amps until I reached a certain point where I would have to start spending crazy money on equipment. I thought this was the end of my audiophile journey—that was until my dad picked up a 1994 pair of KEF Reference Ones. Before this pair of loudspeakers, I had only listened to budget bookshelf speakers, and I thought they sounded nowhere near as good as my headphones; they didn't have that wide soundstage and ability to pick out all the small hidden details. The KEFs blew me away. Amplified by cheap Denon AV receivers in its early days, then selling off some cryptocurrency I had bought in high school, I splurged and bought a Cambridge CXA61. That amp and speaker combo followed me to college and I was very happy with its performance.

At some point during summer break I was at a friend's parents' place who had a pair of 804D B&Ws, an Oppo CD player, McIntosh preamp and power amp. I cycled home and returned with six CDs. I spent the remainder of the party in the living room while beer pong continued in the garage. Frank (the owner) loved that I had brought over Beethoven's 6th Symphony, as did his friends who were BBQing in the back. So now I knew that there was even more room to grow.

My senior year of college I picked up a pair of Polk SDA SRS 2.0 that were the greatest speakers ever for a college house. You could hear them down the block at 12 o'clock on the amp. By now I was deep into my addiction, and had a Hafler 500 power amp and was still using that Cambridge as a preamp. I enjoyed my time with those speakers, but later sold them as I really didn't have the space and, frankly, they did some things incredibly and fell flat on their face for others.

At some point my good friend and fellow audiophile Sam picked up a set of Thiel CS 1.2s. I was blown away. They stood about as tall as a fifth grader, but filled the room with a bright, airy tone that was to die for. Within a year we both had a pair of 3.5s. I again thought this was the end of my audiophile journey, as we had reached the point where multiple thousands would need to be spent for small sonic improvements. That was until a pair of 3.6s came up for a whopping two hundred dollars. I drove from Oakland to Ukiah to load them in my car. Cool old hippie guy on a farm was glad to see them go to me.

By this point, I had picked up two NAD 2200 power amps, one for each speaker, as well as a Dayton Audio OmniMic measurement microphone. So here began my journey into equalization, sonic coloration, and experimentation. I loved the 3.6s, but the bass was too fat and boomy; it would drown out the other frequencies. I knew this wasn't what they were supposed to sound like and invested in sound panels in my listening room, only after moving around every piece of furniture in my room to accommodate the speakers' best possible position—priorities. I quickly discovered my problem areas and got to work taking multiple measurements and using REW to create a custom EQ to cut those room modes. The end result knocked my socks off. It wasn't just less boomy; the midrange had a veil lifted, vocals that were once shrouded came forward. Within a few hours the speakers had taken on a new life.

I took this newfound ability into the living room and, with the help of an incredible program by OCA, the 7.2 system improved drastically—far more difficult to do than a simple stereo setup. From here many hours went into studying time delay, crossover integration, proper phase alignment, proper integration of subwoofers. Again, I owe most of what I've learned to OCA and his YouTube videos; his expertise was instrumental in my education.

Contact

Tell me about your room, gear, and goals.

Typical reply within 1–2 business days · Greater Bay Area

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