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Helix Dome MTM

Apollo-7 MTM

Quick Overview

Full range high power 7" MTM.


* This kit ships for free *

$289.58

Availability: Out of stock

Details

From the designer:   Apollo is a stand mounted speaker featuring the amazing Anarchy 7" woofer and a large format 30mm fabric dome tweeter in a shallow waveguide from Wavecor. Thanks to Anarchy's incredible linear excursion capacity, Apollo is able to reach cleanly to 110dB, given adequate power, from 40Hz on up. A pair of Apollo speakers will pressurize a room like no other 7" two-way. Home theater dynamics will take on a new realism, and the bass extension capabilities of Apollo will allow you to fine tune subwoofers to augment only the lowest octave giving you the most coherent and integrated sound possible. And for two-channel music playback, most recordings will have no bass content beyond what Apollo is designed to handle with authority.

The Anarchy woofer is a marvel of transducer design and features an advanced motor that utilizes "shorting rings" to dramatically reduce excursion induced distortion. In other words, the midrange remains clear and clean even under the demands of chest pounding bass. To compliment these paradigm altering woofers, the 30mm Wavecor tweeter is large enough to take over at 1500Hz without missing a beat. The combination renders vocals with in-room realism thanks to a computer optimized crossover design that was extensively vetted with over 100 hours of extended listening to a wide variety of recordings and musical styles. It is a speaker system for all occasions..

 

Product Notes: 

The Apollo was designed as a high output full range speaker.  Typical in-room bass response will be in the mid 30's. 

 

Product Highlights:

  • Huge 30mm tweeter mounted in a circular waveguide.
  • Class leading 7" Anarchy woofers for great bass output with 12mm X-max.
  • In room bass response down in the mid 30hz range.
  • Will handle over 200 watts and play at 110db from 40hz up.
  • Can be used as a center channel by laying on it's side.
  • Timbre matched to the single woofer version (coming soon).

 

Minimum order is 2 speakers: If you ordered one in the past and need one for a center, please contact me. Kits are sold as full kits, sorry no substitutions or subtractions. Don't forget binding posts, terminal cups, or speaker spikes if you need them because they can be shipped for free with any kit or flat pack purchase.

Shipping Note: Most speaker kits currently ship for free, but flat packs normally do not.  We try to get your order packaged and shipped in 5-8 days depending on how many orders have come in.  Please read the 'Frequently Asked Questions' section for more information.

  1. Great Speakers review by Roadie on 12/6/2022
    Design
    Performance
    Value

    This was my very first speaker build and I was a little nervous but everything worked out great. I built these as a Christmas gift for my son. Breaking them in before mailing out to him and they sound better than my towers! The voicing is definitely more clear than what my Polk towers provide. Bass hits deep as well. Can’t wait for my next DIYSG build!

  2. Tower performance in a bookshelf review by MW6006 on 3/7/2021
    Design
    Performance
    Value

    I looked around at many kits before deciding upon these including anthologies, statements and the vortex series. The bass that these anarchy woofers can produce is just astounding and they seem to do it without effort. I've never had a bookshelf speaker hit me in the chest with the pressure that these do, it just blows me away. The wavecor tweeter that is used is no slouch either, it has fantastic clarity and plenty of detail. Pete did a fantastic job designing the crossover for these and I can listen to them for hours at a time easily. I can't recommend this kit enough and everyone who I demo them for is blown away.

  3. Crystal clear beasts review by Drew on 2/20/2021
    Design
    Performance
    Value

    These speakers are monsters. The clarity that they produce at high SPLs is incredible. And at the same time they reach down easily into the 30s, making it easy to blend with a good subwoofer. Pretty flat frequency response across the range, but I do detect a bit of glare with the high mids/low treble. Not entirely sure it's the speakers, it could be my system, but I've got pretty good balanced components and more than enough power to drive them. In any case, they absolutely POUND and look really good as well. I finished mine in some walnut veneer and they look gorgeous. I see that they've been out of stock for quite a while here at DIYSG, but if they ever show up again, my recommendation is to jump on a pair. If highly detailed clarity and strong bass are your thing, these can't possibly be beaten for the price.

  4. Amazing Speakers for A Strange Mounting Limitation review by lapean111 on 7/27/2020
    Design
    Performance
    Value

    I have a bar in my home that has some really specific mounting/space limitations. The TV and Stereo speakers are mounted on a wall near where the entry to get behind the bar is. This location requires wall mountable speakers. The space is large, so they need to be beasts to deliver the sound I am looking for.

    These things are BEASTS. They dig cleanly into the upper 30s. I was able to lower the crossover to my sub to 50hz, which completely makes the sub unlocatable when listening.

    The imaging on these things is unreal. My wife was closing her eyes, and telling me where on the stage each of the instruments were. I am not articulate enough to convey how amazing these things sound, even mounted horizontally, up high.

    I moved the ports from the rear to the top/side in order to facilitate the wall mounting.

    I highly recommend these great speakers to anyone looking for something musical, muscular, and just beastly.

  5. Awesome speakers! review by yz400 on 12/4/2018
    Design
    Performance
    Value

    I bought the pair of MTM Apollo's along with the MT for the center channel. I had a blast building these. I purchased the crossover board that I still assembled and I believe that is the way to go. Anyone with the skills to do the project in the first place could build the crossover with that board and the instructions provided.

    The packaging they arrive in is 2nd to none. I am pretty sure they UPS guy could throw them off the truck and it wouldn't hurt them. Excellent job taking the time to pack them so that it's almost impossible to get damaged during the shipping.

    I glued, clamped, sanded, primed, painted, etc these until they were exactly what I wanted. Then I assembled the speakers into the boxes. Taking my time on all of it, I still completed all three of them in a little over a week. I was on vacation though so I had some extra time but definitely doable in a couple weeks time.

    I also was building the overnight sensations at the same time and I finished them first. I was very impressed with them and when I hooked up the Apollos, I was not disappointed. These things will get uncomfortably loud. I think they actually sound better the louder you crank it. I have not set them up with my TV surround sound setup yet but that is why I bought them. These things will blast and I am very happy I bought them and did this project. I would recommend them to anyone looking for a high powered speaker that will impress.

  6. Articulate and powerful! review by Srowe on 10/10/2018
    Design
    Performance
    Value

    Have had these running for a few months now and they just seem to get better! I know there will be an age long debate on break in, but the first time I fired them up they sounded pretty good but nowhere near how they sound now. They have smoothed out and and Image like crazy. Low bass is very full and have nice midbass punch. The Anarchy woofers are absolute beasts but have terrific midrange clarity. My wife and daughter even commented how they liked the sound better than the B&W 685s2 that these replaced. Highly recommended!!

  7. Excellent performers review by beatle on 8/13/2018
    Design
    Performance
    Value

    I bought a trio of MTMs to replace my Klipsch Heresy IIs and Academy center channel. The Hereseys (Heresies?) were super clear and loud, but lacked any bass, and they were fatiguing to listen to at high volume. I wanted something with better bass performance and a matching center channel.

    The kits were very complete, even with specific screws for the tweeters and woofers, though I didn't receive any gasket for the woofers. I used some existing 1/2" gasket material I had on hand. As with the other kits I've bought from DIYSG, the packing material is unmatched. I cut my own baffles, but the ones included were very good.

    Listening to music and movies, both were great. Audyssey set up the speakers as full band, so there is obviously some authoritative bass. They sounded great a high (90+ db) volumes with all kinds of music. I have a 15" sub as well, but I could see these working well for casual listening without a sub.

  8. Impressive all-around review by a|F on 5/14/2018
    Design
    Performance
    Value

    I built three Apollo's for LCR and was worried about the jump from a waveguide (Tempest) and how these would sound in my open and reflective family room. They excel and are on another level of refinement compared to the Tempests (which I love, btw). The bass, tweeter clarity, and imaging are incredible. Audyssey set the crossover at 40hz and that's great, as I can keep my subs off for all tv viewing. Pete nailed it. Highly recommended.

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Speaker Kit Information

 

  Model:      The Apollo-7 MTM
  Designer:      Pete Schumacher
  Frequency Response:      36hz - 20khz (+/-3db)
  Power Range:      20 - 250 watts
  Sensitivity:      88db - 2.83v/1m
  Impedance:      4 Ohm
  Tweeter:      Wavecore TW030WA11
  Midrange:      N/A
  Woofer:      Denovo Audio 7" Anarchy
  Enclosure Type:      Ported
  Dimensions:      9.5" W x 23.5" H x 13" D
  Kit weight (no cabinet):      ?
  Assembled weight:      Varies

Price Break Down:

2 - Denovo Audio 7" Anarchy woofers: $138.40
1 - Wavecor TW030WA11 tweeter: $95
1 - Set of crossover parts: $64.17
2 - 2" adjustable ports: $6.98
1 - 3/4" thick MDF front baffle:  $12
1 - Set of screws and gaskets:  $1.50
 
 

Packaging Material: $4.00

Paypal Fee: $10.01

Retail Cost: $332.06

Discount Cost: $289.58 and shipped for free.

Please read the 'About Us' section for more information on pricing structure and quality parts used.

Specific Apollo-7 MTM Assembly Notes:

Your enclosure should be built with 3/4" thick material with two horizontal "window pane" style braces to the dimensions listed.  It is recommended that you lightly stuff your enclosure with polyfill without blocking the ports. The original ports are telescopic with an extension.  You don't need the extension at all, just the inner section.  I will likely start shipping them without the extension tube so it doesn't cause any confusion.

 

Recommended Tools and Supplies:

  • Quality wood glue like TiteBond.
  • At least 2 clamps 24" wide or bigger.  
  • Soldering Iron and solder unless there is an optional assembled crossover for your kit.
  • Wire cutters
  • Screwdriver
  • Drill to predrill all screw holes.
  • Sanding block or power sander.
  • About 8' of speaker wire to connect your woofers and tweeter to the crossover board.

 

General Tips:

    Crossover Assembly: 

  • VERY IMPORTANT - Inductors are the parts that look like small rolls of copper wire. Notice that the two ends of wire are silver and have been 'tinned' with solder. Those are the parts of the inductor that you should be soldering to, so don't cut it off to get to the copper colored portion.  Inductors should not be installed directly next to each other on your board.
  • None of the crossover parts have a positive or negative side so it doesn't matter which way they are facing when you assemble your crossover. 16-18 gauge wire is thick enough to use for your crossover or to go from your crossover board to the woofer or tweeter.
  • Your crossover can be assembled on a thin piece of MDF or pegboard if the kit doesn't come with a circuit board.
  • It doesn't matter where you put the crossover inside your speaker.  You could mount it on the outside if you wanted to.  
  • Normally you wire red wires to positive and black wires to negative.  If (and only if) your crossover schemtaic has a note saying 'Inverted Polarity', that means you need to connect the negative from the crossover to the positive on the tweeter and positive from the crossover to the negative on the tweeter.  This is only done on some tweeters, not woofers.
  • Click Here for a good assembly video by Matt Grant.

     

     Screws and Gaskets:

  • Predrill all screw holes with a bit that's slightly smaller than your screws to prevent the wood from splitting.  Most screws are #8 panhead and you can use a 7/64" or 1/8" drill bit.  Overnight Sensations use a #6 panhead so you can use a 3/32" bit.
  • VERY IMPORTANT:  Protect your woofer or tweeter when installing screws because you don't want the screwdriver to slip and puncture one of your components....that will ruin your day!  Consider putting your free hand next to the screw to cover up the edge of the woofer or tweeter.
  • If your kit comes with gasket tape, it should be applied to the back of the waveguide. Peel the paper off the back to expose the sticky side and slowly work it around the perimeter on the back side of the part.  Some woofers will need gasket tape as well.

   

     Stuffing or Lining the Speaker Cabinet:

  • If your speaker or subwoofer is a sealed cabinet, most designers recommend that you lightly fill the inside with polyfill (pillow stuffing).  If you don't have polyfill, then you can line the walls with 1" - 1.5" thick light weight open cell foam (like acoustic foam) or fiberglass insulation.  You can also use 2-3" recyled denim insulation that can be bought at Home Depot.
  • It's okay to cover up your crossover with the polyfill, insulation, or foam.
  • If you're using a ported enclosure you should lightly fill the cabinet with polyfill and be sure not to block the ports.  If you do not have polyfill then line the walls with 1" - 1.5" thick open cell foam (like acoustic foam), 2" - 3" of denim insulation, or 2" - 3" thick poly batting.
  • Some of the speaker designers like to lines the walls of their ported enclosures with a 1" - 1.5" acoustic foam, and then lightly fill the remainder of the cabinet with polyfill.  If this is a required method, it will be listed at the top of the page under 'Assembly Notes'.

 

Links to Build Threads for this Speaker:

Frequently Asked Questions:

* Does the baffle come with roundovers?  Answer:  No.  If you really need roundovers, please send me an email and I can try to put them on the edges for you.

* Do the woofers get wired in series or parallel?  Answer: They should be wired in parallel.

* What length should the ports be?  Answer: The ports that comes with the kit should be used at full length, no cutting.

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