lukeamdman

Somehow most of the links in the first post were broken again but they should be fixed now.

Just the Othorns and the SP 12k I'm powering them with.

Mint condition, never a single hiccup. $2,500 shipped. I'll supply whatever power cord you need. Right now it's a L6-30P (250v 30A twist lock).

$3k for the pair. I won't ship these but I will drive a few hours from 55337 to deliver them. I have no desire to sell these, and never thought I would, but life happens https://www.avsforum.com/forum/155-diy-speakers-subs/1475195-dual-othorn-build.html

Oh boy!

In other amplifier news, SpeakerPower is under new management since Brian has retired. Retail prices appear to have increased as well. http://www.speakerpower.net/about-us.html "CEO's Message Welcome, I am Justin Ryan, CEO of SpeakerPower. In 2018, I acquired SpeakerPower from its founder, Brian Oppegaard, upon his retirement. I am very excited to continue the growth and development of SpeakerPower. As an experienced executive in a variety of industries, and an MIT trained engineer, I know what it takes to develop exciting new products that satisfy the most demanding requirements of customers for their cutting edge products. With further investment in new products, I plan to build on SpeakerPower's 16 year track record of delivering high quality, powerful, efficient, and intelligent amplifiers. For OEM manufacturers in Professional and Home Theater markets, SpeakerPower provides the opportunity to have next-generation intelligent amplifiers in your self-powered loudspeaker line. Our complete turn-key approach means that it is as easy for you to install a SpeakerPower amplifier in your cabinet as a woofer, horn or compression driver. With our proven designs, you will be up and running quickly with minimal up-front investment. And our state-of-the-art digital signal processing and power technology will reinforce your image as a technological leader. With designs from 200 to 12,000 watts, we can meet your most critical needs. Users of SpeakerPower amplifiers enjoy high power and high efficiency, with intelligence designed to ensure continuous output in the most demanding applications. Our products are manufactured and supported right here in California. Our commitment to quality, technological acuity, and steadfast product support means your loudspeakers are powered with confidence. See what we can do for you today. Justin Ryan CEO"

Add 4 more Terraforms to what you have now.

When pennynike1 had (2) Othorns + (4) Terraforms I measured 135db in his room, so +12db going from 2 Othorns to 8. I've hit 148db RMS and 154db peak in my room at the LP and I still haven't clipped the three SP2-12k amps.

I remember audio snobs singing the praises of a REL sub and how "accurate" it was. When put on the bench it was basically a distortion output machine.

I have more 12k's but I still drool over those K20s!

These days you'd want to give this guy a call: https://en.wikipedia.org/wiki/Brian_Shaw_(strongman)

How's this going?

DONE! All links and pictures on the first page have been updated. Using IMGUR now.

I watched Kong at reference with the bass 10db hot...

Rented Kong last night and I really enjoyed the movie. Tons of bass throughout and the Crowsons definitely got a workout. Some great demo material with this one so I'm definitely buying it.

This thread was hosed by Photobucket. Sometime this week I'll fix all the pictures and links.

I'm offended.

Go a little bigger.

Don't forget your "brilliant pebbles"

Lol what

No....I absolutely DO NOT check this thread every single day for an update. Sheesh!

Josh, have any 18s laying around you want to sell? I'm thinking about converting one of my DO sealed boxes into a ported sub for my boys to play with.

Doesn't the dragon crash at the end of HTTYD have a lot of <5hz?

I'm sure someone could find an application for this, but the more I think about it the less it seems worth the hassle. Wouldn't it be easier to series the load and use the amp in bridged mode like you normally would, and skip the parallel inputs and reversing the polarity on one of the outputs? Even in the best case scenario of a 15% gain, we're talking about a fraction of a single dB of gain.

I was asked to test this over 2 months ago but I've been a huge slacker: http://www.prosoundweb.com/topics/sound_reinforcement/fighting_for_power_a_way_for_amplifiers_to_increase_actual_power_delivered_/ The basic theory is that if an amp is driven in stereo and both channels are producing the exact same signal, both channels are also drawing current from the power supply at the exact same time/interval. The author of the article claims that if you parallel the inputs but flip the polarity on the input of one of the channels, causing the sine waves from each channel to be exact opposites, the channels are now "taking turns" drawing current from the power supply. For these tests I used a CC4000, wired my test rig for 3.4ohm per channel, and used a 30hz sine wave for a duration of 2 seconds. I pushed the amp as far as it could go while still producing a clean sine wave. For test #1, I used an XLR y-splitter cable to parallel the same signal to the inputs and the amp was in stereo mode. For test #2, I put the amp in bridged mode and didn't make any changes to any cabling. According to the article, all this switch does is reverse the polarity going to the B channel of the amp. Results: Test #1: Test #2: Really no difference at all, certainly not the 5-15% increase claimed in the article. In fact, I think test #2 has slightly more distortion in the wave form when pushed to the same 190Vpp.