Welcome to JHS Audio. Feel free to browse through the links below.

New stuff is towards the bottom, and dates indicate updates to pages.


Past Systems Generally Useful Info Other Stuff
Ariels Links Audio Items for Sale / for Free - 8/9/07
4-way horn stack Horn Design - 2/7/06 150Hz Tractrix horn
Unity horn w/ vented sub Wavefront Measurement in a Horn Bend 27Hz Horn Subwoofer
3-way Unity horn FEM's of Bass horns in Various Orientations in Rooms Fostex FE83 in a SS pot
Unity horn w/ dipole midbass Some FEA's of Waves in Curved vs. Reflector Horn Bends Unity horn - 10/28/05
5-way mono horn stack A Budget Speaker Measurement System MCM Horn sub (built by Tim Moorman)
3-way horn stack:
27hz horn, EVM12L in 75hz horn,
various 1" CD's on a 500hz tractrix
Stored Energy Measurements 40Hz Horn
JBL Sub1500 in sealed box,
conical midrange w/ 4x 5" drivers,
JBL2470 on 500hz tractrix,
Fostex FT17H
H and U baffle dipoles - 12/30/04 Metal Working projects - 12/23/07
Temporary apartment system:
Fostex FE168E Sigmas on open baffles
Polar maps of various horns - 7/7/05 Horn subwoofer using two HL10's
Current: Fostex FE168E Sigmas
on open baffles with JBL Sub1500 in
sealed box, mains time delayed to match sub
. DIY Super tweeter - 12/18/04
Starting a new die - 2/14/05
More die - 2/26/05
071208 - basement system -
4x HL10 in 30hz EBS vented box to 200hz,
40 degree conical up to 1.7kHz,
Radian 475 on 500hz tractrix,
DSP crossover, eq and time delay -
0-60 degrees in room, 0-60 normalized
0-60 normalized, 1kHz crossover w/ better power response
Directivity index w/ 1kHz crossover
System with Fostex FT17H added
Directivity index with FT17H added
(crossover at 10kHz still needs work, but DI comes down in the 10kHz-20kHz octave)
. DIY 6.5" shorting ring (~1.5" diameter) - 10/3/06

Copyright 1999-2007, John H Sheerin

Feel free to email me at jsheerin456@123hughes.net with any questions or comments.
(remove all of the numbers from the address - sorry, but I'm trying to cut down on my spam intake)

There have been 87413 hits on this page since Feb. 28, 2003.