Isetta 2.1 Speaker Build

Isetta 2.1 Speaker Build


Designer:
GoofBoy

Project Category:
Freestyle

Project Level:
Intermediate

Project Time:
20+ Hours

Project Cost:
$100 – $500

Project Description:
IMplementation of Paul Carmody’s Isetta 2.1 Enclosure with an added built in amp.

Design Goals:
Make a small box that doesn’t look like something you can buy cheaply in a store. Also, to have fun.

Driver Selection:
1 – Tang-Band W5-1138SMF

2 – Fountek FE85

Enclosure Design:
Solid Santos Mahogany, African Mahogany Veneer, Solid Wenge, and 1/2in MDF were used for the enclosure.

Enclosure Assembly:
Hardwood and veneered MDF so it does require some thought on wood movement. There is a full annotated gallery of the build with some wood working tips here – https://imgur.com/a/mFRAiLh

Crossover Design:
Staight from Paul Carmody’s Isetta design – (https://sites.google.com/site/undefinition/isetta)

Conclusion:
Really like the sound and the look of the end product. Fun build.

About the Designer:
A woodworker and recovering engineer just getting into making speakers, because… well, it is just fun.

Project Parts List:

3 Ohm 10W Resistor Wire Wound 5% Tolerance
Dayton Audio 0.50mH 18 AWG Perfect Layer Inductor Crossover Coil
100uF 100V Electrolytic Non-Polarized Crossover Capacitor
12uF 100V Electrolytic Non-Polarized Crossover Capacitor
Fountek FE85 3″ Full Range Speaker Driver
Tang Band W5-1138SMF 5-1/4″ Paper Cone Subwoofer Speaker
Acousta-Stuf Polyfill Speaker Cabinet Sound Damping Material 1 lb. Bag

3 Comments

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  1. 3
    Joe

    I am a little confused by paul’s design drawing. Maybe you can help. is the interior dimension of the fountek enclosure 3.25 x 2 x 7, or is the dimension intended to be 3.25 x 2 x 8. The former would create a volume of .75 liters, the latter a volume of .85 liters. I can’t tell from the drawing if the top and bottom of the enclosure sits on top of the sides and front/ back, or if it is supposed to be flush with the front of the box. In the photo of the finished box, the top is clearly inset. It’s the same for the volume of the sub enclosure. With an interior height of 7″, the sub volume is 7.4 liters, for an 8″ height, the interior vol is 8.5 liters. Quite a difference. I guess I am asking for the interior dimensions of the enclosure.

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