Octopus 4x8" Full Range Pair
Octopus 4x8" Full Range Pair
The Octopus speakers are a 9 inch deep, 22.5 inch wide, 29 inch tall “bookshelf” speaker that get surprisingly loud.
Octopus are original design loudspeakers, and after 16 years into my audio career, I am excited to share these new innovations. The Octopus speakers are beautiful pieces of furniture, and they blend in visually with any decor much easier than the typical PA system. The Octopus 4x8" Array is a high fidelity public address speaker design based on the Triton 8" full range and is the first regular production large-format speaker model from Blumenstein Audio. I designed the internal bracing structure in collaboration with a local guild of luthiers (guitar makers). You haven’t heard a speaker that sounds quite like this before. The solid wood bracing truly takes effect at this scale.
The cabinet weight is only 45 lbs each, and the bass reflex ports on each corner additionally work as handles. This makes gigging or moving a cinch! There has never been anything quite like the Octopus from any DIYer or larger audio corporation. The Octopus is pro audio PA, home studio, and home audio living room. Because these speakers are larger, they carry the capability ranges of the Marlins, Orcas, and Tritons.
Attention to detail abounds both outside and inside the enclosure. We use shop milled solid wood internal parts alongside the shortest length and lowest resistance paths of internal wiring to make these speakers handle even more power than they look like they would. The tweeter gives recordings a silky and smooth sonic texture, yet makes significantly more detail than any other speaker I make besides the Feastrex speakers. All these factors and more make the Blumenstein Octopus speakers so special in the full range speaker lineup.
Efficiency: 101db sensitivity. 250 watt RMS power handling yields a total of 120db maximum average SPL performance from 40hz up to 25 khz. Warm yet bright, with a music-first sound quality common to vintage loudspeaker designs. Bass from a pair of Octopus is prodigious on their own, and mates with a large subwoofer below 40hz perfectly to support the lowest tones found in electronic music.
Price is for a pair.
Octopus weigh 45 lbs/ea. 90 lbs/pr.
Ships worldwide from Seattle, WA.
60 day in-home audition, 1 year warranty.
12 years in development.
Who are these speakers for? Anyone! Do you like loud music? Then you really need to hear these things!
The only parts of the speaker I could not make lightweight are the magnet structures, which use conventional large ferrite magnets, because I feel they offer better sound quality than neodymium which is the industry standard for PA systems. The magnets inside the Octopus account for over 20 lbs of the entire speaker weight alone. Meaning that the wooden cabinets are only around 20lbs ea.
Most other leading brands of PA systems are designing them to be like battle bunkers to survive in a noisy bar, rain and sun, or to handle death metal music at distortion inducing SPL’s. But the second you bring those ugly painted boxes inside to a wedding dance party for instance, and they quickly stand out as the ugliest pieces of furniture in the room… Not to mention the brash sound quality, which typically only comes alive at higher than comfortable volume levels.
Modern PA systems focus on cold accuracy. In the process of chasing that means to an end, the modern PA design paradigm forfeits the effort to be a logical extension of the musicians’ instruments.
Typically, speakers with this wide of a baffle (29”!) are also about the same depth as their width. This turns most large format loudspeakers into washer dryer combo sized household appliances. The Octopus, however, is only 9 inches deep! It can sit in front of most house PA systems and will sound better than the house PA without ruffling the soundboard operator’s feathers.
An Octopus cabinet is actually 4 independently braced cabinets internally which isolates each driver into its own tuned chamber. This mathematically produces quadruple the efficiency of a single Triton speaker pair. quadruple the power handling and bass output. The Octopus offer high efficiency and wide dynamic range.
The super tweeter is upgraded from the Triton design to a pro audio Eminence horn tweeter attenuated with an L-pad. The sound of this tweeter configuration, supported by a Solen capacitor is superb. The L-pad is barely needed as the four 8" full range drivers collectively approach the efficiency of the horn tweeter.
The Octopus speaker is geared towards two different consumer markets that are intrinsically united. To the audiophile crowd, a speaker like the Octopus requires no introduction. High Efficiency speaker enthusiasts of golden age equipment have always looked towards professional equipment from those times. Yet the Octopus is built to better specifications than the high efficiency speaker cabinets from the old days.
Overall, considered simply as a HiFi speaker (though it could get much louder if you need it to!), this is one of the most beautiful sounding speakers I have been able to develop in my career. The combination of efficiency and power handling in this design is an incredible space I welcome you to explore with capable amplification. Tube amplifiers, solid state, and digital amplifiers alike are all well suited to the Octopus. It will keep grasp of the music no matter what you throw at it.
They might seem large, but they really are a no nonsense 9” deep bookshelf speaker. The sound quality itself is a carefully formulated tribute to the same types of tonal character in the mids that comes from other classic high efficiency speaker designs from the first half of the 20th century. Yet the bass and treble clarity keeps up better with the needs of 21st century music than most vintage speakers.