NORTH READING ENGINEERING
NORTH READING, MASSACHUSETTS 01864 USA
 
SERVICES
CUSTOM LOUDSPEAKER CROSSOVER NETWORKS
CROSSOVER NETWORK REBUILDS AND MODS INCLUDING DUPLICATION OF VINTAGE OR NLA DESIGNS
VINTAGE McINTOSH AMPLIFIER RESTORATION AND MODIFICATION

Contact North Reading Engineering

WELCOME TO NORTH READING ENGINEERING

North Reading Engineering is a Massachusetts certified business founded to provide engineering services to those engaged in home and professional audio.  I provide loudspeaker crossover network solutions, loudspeaker design, vintage amplifier restorations, amplifier modifications and measurement services. 

CUSTOMIZED LOUDSPEAKER CROSSOVER NETWORKS

The acoustic performance of networks built are verified using a wide range of tools including analog circuit simulators, high sampling rate acoustic analyzers, distortion analyzers and precision measurement microphones.  I'll request that drivers be provided to my location for measurement.  Only then can the actual results be substantiated and design iterations made.  I'm able to perform measurements in quasi-anechoic conditions using near and far-field techniques with access to a large indoor facility that allows ground-plane measurements to 4m. Networks are then designed to obtain the correct acoustic response.  Measurement service for a filter project are done without fee since it provides an opportunity to develop potentially new products or measurement techniques. 

NETWORK REBUILDS, MODS, MEASUREMENTS
Have an old JBL, KLIPSCH or EV network that you would like made, repaired or duplicated?  Pricing is competitive and I'll also provide performance data that demonstrates the network is actually operating as it's supposed to.

VINTAGE McINTOSH AMPLIFIER REPAIR, RELIABILITY SERVICING, OVERHAULS AND RESTORATIONS
Do you have a 70s-era McIntosh amplifier or integrated that hasn't been checked for performance since Dave O'Brien of the famed McIntosh Amplifier Clinics last looked at it?  If so, I have the experience, tools and test instrumentation to properly assess the condition of your amplifier and make it a lot better.  More information on amp servicing can be found HERE.

McINTOSH MODIFICATIONS
Yes, the first generation McIntosh amps can be modified to provide better sound.  More information on a new preamplifier board, shown below, that provides a significant upgrade to these vintage classics can be found HERE.

North Reading Engineering Pages
NORTH READING ENGINEERING AUDIO FORUMS
- Lots of technical stuff and adding content all the time.
MODELING THE KLIPSCHORN BASS HORN (Part I) - The Beranek Model, LTSPICE and a slew of measurements.
PHOTOGALLERY OF A KLIPSCHORN REPLICA BUILD - Building a Klipschorn is not for the faint of heart!
A KLIPSCHORN NETWORK FOR BUILDERS - A measured design you can build yourself.

Places To Visit
VOLTI AUDIO
RETRO VINTAGE MODERN HIFI
KROHN-HITE
SOUNDSCAPES
NORTH READING ENGINEERING FACEBOOK PAGE


Website and contents property of John Warren of North Reading Engineering, North Reading, MA 01864 USA.  No part of the above may be copied and published, in part or in total, without permission.
2017 John Warren