Axiom Home Page Forums General Discussion Home Theater Lets plan a theater space

sic pun

Toys!!! More to come.

A box colored with cow spots by a young child?

Dirac related?

A box of blank CD cases?

The world may never know.

A terrified face met me at the bottom of the stairs. She was relieved to see I wasnt in the room. She was disheartened to hear 6 more sweeps were coming....

My house got a massage this morning. Lol.

Testing commences on the DSPeaker Antimode 8033SII subwoofer correction device! Socketman had one free'd up when his secondary system was under some maintenance and offered to ship it my way for a spin. What a nice guy!!

I've spent the morning playing around with it and am pleased with it's performance. It is simple to use and works as intended. The frequency sweeps were thrilling to say the least... from outside the room. I was able to measure (after listening tests) it was only affecting the room resonance region I would expect given my room's dimensions. Good news!

I need to spend more time with it to dial in the phase and levels post DSP applied to get a better indication of what is possible when tweaked using calibration tools. My initial listening impressions are positive and are as follows.

-It produces tight bass without sounding overly dry when engaged.
-It reduces overall tactile room response when engaged vs bypass mode.
-It does not shrink or modify the soundstage in any way I could discern.
-The overall perceived bass output is reduced slightly while couch rumble is reduced considerably.
-It is nice to have a simple one box solution that just works.
-It wasn't a pain in the neck like the Dirac computer trial. No handshake or format issues.

I used a bunch of music and a few movie sequences for testing I am very familiar with.

The music sequences were the first minute or so of Prince's Controversy, Michael Jackson's Billie Jean, and Mackelmore's Thrift Shop. For fun I threw on some old school Jamiroquai to listen to Stuart Zender's funky basslines.

Movie sequences were the "Beelzeboss Showdown" Chapter of Tenacious D in the Pick of Destiny and "The Falcon Flies Again" in Star Wars the Force Awakens. Both scenes use extremely dynamic and impactful bass swings.

Initial cursory measurements with pink noise show it is only affecting the low bass region. You can see the modes at 25hz and 50hz in my room are reduced in the plot. I will take a battery of plots later when I really get things dialed in with the DSPeaker engaged. Curious to see what the waterfall plots say.

Interesting... do you hook this up into the subwoofer channel only or further upstream ?

It goes between your receiver and the sub. It generates its own test tones.

Yep, that's how I'm hooked up. I should probably mention the subwoofer's cutoff dial is at max and all bass management is done via the AVR. Since the tones are generated by the DSPeaker, corrections stored in the device are probably covering a range all the way up to 200hz or so.

I wanted to verify that the DSPeaker is only active on the incoming source frequencies and isn't creating any spurious corrections outside the incoming source frequency range. Good to go.

I watched the new Ghostbusters this morning and noticed the DSPeaker definitely reduces tactile room response. On the other hand I can turn up the volume to loud levels without having bass bloom issues in the room. It's a tradeoff it seems.

I am going to re-tune the levels to match the +5-8db rise in bass output I had pre-dsp and set the distance to compensate for the processing time. They recommend adding 3 feet in the manual. I will test and see.

It is already seeming like I can make some conclusions, but I will hold off for more testing and data to present.

The new 'Ghostbusters' - took lots of naps thru that one, ha!

TAM

Lol. Me too. Today's rewatch was a better experience. My wife loves it. Empowering I guess.

Measurements completed and levels altered. Subjective testing continues....