Model: BOSSA NOVA

December 17, 2023 agconrade Leave a comment

Construction and Tuning by Aidan Conrade

These are assembled realizations of the Samba MT Loudspeaker Kit, found on Parts Express. After going through what I wanted out of a loudspeaker and how much money and time I had to work with, I was approved to choose a solid knock-down kit with drivers and a passive crossover to build! I built them to be flexible since I want to do many things with them, so they can handle mixing, instrument monitoring for my bass guitar, and a good listening experience for music and television. They are a manageable size since I wanted them to be easy to fit anywhere I need them to be, as well as be easy to move with. I eventually want to hit them with a layer of primer and some nice burgundy water-resistant paint to make them look nice. While they are speaker kits, I wanted to be able to connect with them more and give them a name, and while I was finishing my work on them I came up with the name Bossa Nova, since the original name was Samba MT, and while Bossa Nova is my favorite style of jazz to play it was also derived from the roots of Samba, much like this speaker was derived from the kit I purchased at the start of this adventure!

The Dayton Audio Reference Series drivers carry the performance of the loudspeakers with their consistent frequency response at a budget price. Each speaker kit cost $165, including all of the parts for the passive crossover, and with the fact that I already had cables and an amplifier that could handle them, I only spent ~$350 on them, with a surplus of $20 going to a kind person on eBay who designed PCB’s for the crossovers in these speakers and sold them in pairs with mounting hardware for the board and wire terminals for your cables so you can easily replace cabling inside of your speaker. For those interested in purchasing this kit for yourself, be aware that they do not come with a circuit board for the crossover like the Dayton C-Note kit.

Specifications:

Dimensions- 15″ x 8.5″ x 11.25″
Frequency Response-
- ± 3 dB from 60 Hz – 1.2 kHz, a shallow dip from 1.2-4 kHz, and a boost from 4-20 kHz that stays back in the realm of ± 3 dB
- Port gives extra bass extension down to 30 Hz
Drivers-
- Dayton Audio RS180P-4 7″ Reference Series Paper Cone Woofer
- Dayton Audio RST28F-4 1-1/8″ Reference Series Fabric Dome Tweeter
Sensitivity- 90.8dB @ 1m
Power Handling- 60W per cabinet
- Max Power Handling- 90W
Crossover Frequency- 2.4 kHz

Selected Measurement Graphs:

Technical Paper:

This paper still needs some work and I ran into some tuning and measurement issues so I hope to update this page at a later date and make everything look nicer!

model-bossa-nova_technicalpaper Download

Categories: 2-way, 1-5, 1-20lbs, Bookshelf/Stand Mounted Tags: Budget, Passive, Soft Dome, Studio Monitor

The Short & Sweets

December 17, 2023 izzywaldie Leave a comment

By Izzy Waldie

By Izzy Waldie

These are called the Short and Sweets because they are short (:o) and I went into the project with the goal of making the song “Short and Sweet” (by Brittany Howard ‘reimagined’ by Bon Iver) sound awesome on them. These are meant to be easy listening speakers for my small apartment, with the listening axis at the perfect level for sitting in a bean bag.

The 8 inch woofer provides impressive low end for the cabinet size, and the planar tweeter provides an insanely crispy high end.

The design is pretty straight forward, just a 2-way speaker with a vent on the bottom (hence the cute little feet), crossover is at 2kHz. I originally intended to use a 2 inch port tube, but testing revealed that leaving the port hole with no tube yielded the best response. One fun thing I tried was adding wedges on the inside of the cabinet to make the sidewalls non-parallel from each other. These wedges are the height and width of the side walls, and are 1.5″ inches thick at the bottom and taper to nothing at the top (this seemed an easier solution to a trapezoid shaped interior without having to do wacky joints). These wedges are glued and screwed to the inside of the sidewalls, doubling as bracing for the enclosure (and adding to the weight for a total of 52 lbs)

Specs:

+/- 3dB 30-20kHz (with slight smile curve)
8″ woofer
Planar tweeter

Drivers:

Daytion Audio Reference Series 8″ Woofer
GRS PT2522C-4 3-1/2″ Planar Tweeter

izzywaldietransducerpaper Download

Categories: 1-5, 2-way, 40-60lbs, Bass Reflex, Planer, Tower/Floor Standing

765PAs

December 16, 2023 Cole Puertas Leave a comment

This is the system I built for the 2023 Fall semester of SND4120 @ MTU
I made PA’s with the main purpose of using them for DJing and Live Music, they are meant for use both outdoors and indoors. They utilize a panel amp so they can be easily transported and quickly set up. They make use of split 1/4″/XLR inputs as well as True Wireless Stereo Bluetooth, making them exceptionally easy to connect too. I used a 12″ woofer, and a compression driver from the SB Audience Bianco series for this system, as well a Dayton Audio Plate Amp with built in DSP

765pa-system-documentation

Categories: 2-way, 40-60lbs, 8-10, Bass Reflex, Bookshelf/Stand Mounted

PH1090Zs

May 2, 2019 meablao Leave a comment

Design Goals:

Casual listening
MTM design for subtle bass extension
Small size for portability
Budget of $900 dollars

Key Features:

8″ x 12″ x 18.5″
f3 = 34.87Hz
Vb = 0.6256 ft cu
+/- 2.5dB 60Hz – 20kHz
2″ Ports
Active 2 – way

Driver Selection:

Woofers: SB Acoustics – 5” SB15NBAC30-8
Tweeter: Peerless Vifa XT25BG60 – 04

speaker-glossy Download

transducer-theory-research-paper Download

Categories: 1-5, 2-way, 20-40lbs, Active, Bass Reflex, Bookshelf/Stand Mounted, Cabinet Design, Crossover Type, Enclosure Type, Weight Tags: MTM

TNS6

April 27, 2018 Taran Schatz Leave a comment

The TNS6 or “Temporarily Named Speaker 6” is a 2 way loudspeaker.

Design Goals:

Relatively small size suitable for resting on a desk with maintaining maximum desk space.
Crisp transients while reaching an f3 of at least 60Hz
Natural wood aesthetic