Product was successfully added to your shopping cart.

You have no items in your shopping cart.


Quick Overview

A compact high output design with great off axis performance.

* This kit ships for free *


Availability: In stock

* Required Fields



The Volt-8 uses a custom made 8" coaxial for high output and impressive power handling.  The new surround and spider improves the X-max rating while the light weight cone gives this speaker a smooth sounding midrange even when played at high levels.  The crossover was designed to give an even response that not only excels for surround speaker use, but also for great front speaker performance. The Denovo DNA-150 compression driver (tweeter) is installed on the back and fires through a small waveguide in the center of the woofer giving you point source sound and great off axis response. 

The crossover was designed to give an even response that not only excels for surround sound speaker use, but also for great front speaker performance. The Volt-8 does quite well in small ported enclosures between .5 and .7cuft when used with a subwoofer. The Atmos version is a small sealed enclosure designed to play down to 100hz, which is great for Atmos use. You can use them mounted in your ceiling without an enclosure for Atmos use if needed.  For surround sound or mains, you should build the ported models. 


Product Notes: 

If you do not buy a flat pack the standard baffle is 11" x 15.5" with the two flat plastic ports like the first photo shows.  All of the Volt-8 models were designed to perform best when paired with a subwoofer that can handle the lower frequencies.  The ported versions can be used for fronts, surrounds, or Atmos.  The small sealed cabinet is only recommended for Atmos use.  You can also mount these in the ceiling without an enclosure behind them for Atmos use if you wanted to.



Product Highlights:

  • Uniform off-axis performance
  • Near perfect time alignment between woofer and tweeter
  • Quality name brand components
  • Custom professional grade 8" coaxial for high output
  • Handles up to 400 watts and Sound Pressure Levels of 117db
  • Great for main speakers or surrounds in small ported enclosures
  • Can be used in small sealed enclosures or infinite baffle for Atmos speakers
  • Very easy speaker assembly






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 clear sound review by Andrew on 2/12/2018

    (Posted on 11/15/17 from the old site)

    I bought these at Erich's suggestion for mains in a small to medium size area. The dialogue is crystal clear even sitting off axis. Paired with a 15 inch sub I couldn't be happier.

    Putting them together was very straightforward with the included instructions and the packaging as you may well know was very well done.

  2. Amazing product at an amazing price review by ZLTFUL on 2/12/2018

    (Posted on 10/26/17 from the old site)

    Between Matt and Erich, they have created an amazingly good product at a great price.
    The simple assembly and great CNC work makes it absolutely foolproof to assemble.
    The sound quality is great for the price.

    Thanks again for such a great product.

  3. Bigger sound than expected review by Ahblaza on 2/12/2018

    (Posted on 10/26/16 from the old site)

    These are wonderful speakers and they surprised me at how loud and clean they can play, These are the black cone woofers used and I don't see many reviews of these. I see a lot of folks going with the 6s and 10s overlooking these 8" gems.

    I used these as mains while I was building my LCRs 1099s and was really impressed, don't let the size of these speakers stop you from giving them a shot. My plan was to get the V10s as surrounds to use with the 1099s and Erich suggested these V8s. I'm really glad I took his advice. This is my first venture into coaxial drivers with CD and used as surrounds they keep up well with the 1099s. Even when I used as mains they filled my rather large space with authority.

    Price to performance ratio is unrivaled with with other ID brands in this price range, why spend more, Seriously you would have to spend a lot more to get this output and quality of sound. Very articulate in a 2.1 stereo setup, music came to life with these speakers which surprised me. The V8s shatter the myth that HT speakers are not musical, with these you get the best of both worlds, highly reco'd for mains in a small setup and great for surrounds to pair with my 1099s,

    It surprised me to see only one review of the new black cone 8" driver, I see a lot of 6 and 10 Volt reviews so I thought I would kind of break the ice and give these a 5 star review, I think you will agree with me if you take the plunge.


  4. Great surround speakers review by Markymiles on 2/12/2018

    (Posted on 10/14/16 from the old site)

    I was drawn to these after following lots of different build threads. I fancied going sealed so figured these were the absolute minimum size I could get away with.

    Delivery was quick, around a week to reach me via a forwarding company (uk).

    I found them relatively painless to put together, I was new to soldering so this was the biggest challenge for me. One thing to say as I know I'm not alone in making this mistake. There are two different value rectangular resistors. So make sure you double check the pics on the guide thread to make sure you put them in the right places.

    As to the sound, well I'm very pleased for the price. Nice and clear crossed over at 120. Good spread of sound, perfect for surround duties. Go plenty loud enough too without showing any signs of strain. Now trying to get something bigger (893) for LCR subject to approval.

    Erich was quick and helpful with any questions so buy in confidence.

    Build thread in case interested:

Write Your Own Review

How do you rate this product? *

  1 star 2 stars 3 stars 4 stars 5 stars


Speaker Kit Information


  Model:      Volt-8
  Designer:      Matt Grant
  Frequency Response:

     65hz - 20khz (ported)

     95hz - 20khz (Atmos)

  Power Range:      10 - 400 watts
  Sensitivity:      94db - 2.83v/1m
  Impedance:      8 Ohm
  Tweeter:      Denovo Audio DNA-150
  Crossover Point:      2000hz
  Woofer:      Denovo Audio CX-08
  Enclosure Type:      Ported or Sealed Atmos
  Dimensions:      Varies by design
  Kit weight (no cabinet):      About 15 pounds
  Assembled weight:      About 23 pounds

Price Break Down:

1 - 8" Custom Eminence coaxial: $72.00
1 - Denovo Audio DNA-150:  $19.75
1 - Custom crossover board:  $9
1 - Set of crossover parts:  $23.47
2 - Slot ports: $5
1 - CNC cut front baffle:  $11
1 - Set of screws:  $.50

Packaging Material: $4.00

Paypal Fee: $4.25

Retail Cost: $148.97

Discount Cost: $145 with free shipping

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

Specific Volt-8 Assembly Notes:

A great Volt 6, 8, and 10 assembly thread has been put together to help you build these popular designs.  Click here for all the information and pictures. Your enclosure should be built with 3/4" thick material for the angled surrounds or 1/2" for the standard enclosures and the included 3/4" thick baffle to the dimensions listed under the specifications tab. You should have one horizontal "window pane" style brace towards the center of the standard enclosure.  No brace is needed for the angled surround design. It is recommended that you lightly fill the enclosure with polyfill or some type of loose insulation as long as you don't block the ports. Please be sure to read the general tips below before starting your build. 


Recommended Tools and Supplies:

  • Quality wood glue like TiteBond.
  • At least 2 clamps 12" 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 2' of speaker wire to connect your woofer 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:

* Do I need to cut the port to a certain length on the ported version?  Answer:  No with the kits using the slot ports. Yes with the kit using the round port, total length should be 4".

* Where does the tweeter go?  Answer:  It screws into the back of the woofer.

* Do I need to use a subwoofer with these?  Answer:  Yes, these were designed to be used with a subwoofer.

* Where should I put the assembled crossover?  Answer:  The crossover can go anywhere inside the cabinet as long as you don't block the ports on the ported version.

* Does the standard 11" x 15.5" front baffle fit the angled flat pack?  Answer:  No.  If you're building angled cabinets, the flat pack is highly recommended because they aren't easy to cut yourself.

Also Purchased