Copyrights

Sat, 04 Sep 2010 15:46:00 +0200

Copyright statement:
All logos and trademarks in this TSdb part of site are property of their respective owner. Data from this part may be used for commercial or private use. However, you may not redistribute content from this site in any way, in its original form or modified, without a written agreement with us. If you would like to redistribute the data, please instead ask the intended receivers to download the data from our site. This way they get the latest information.
The database is the property and (C) of www.thielesmall.com/www.41hz.com, Jan Fredriksson. All rights reserved. No warrantees for usability are given or implied. We accept no responsibility whatsoever for the consequences of the use of the data.
This database was started

Testimonials

Wed, 01 Sep 2010 06:40:00 +0200

About this Thiele-Small Loudspeaker Database:

"Your site is professional, useful, aesthetic and I bet it will be an essential source of information for us all"
Alberto Escrina of SPL Argentina

For Loudspeaker Manufacturers and Software Developers

Wed, 01 Sep 2010 05:51:00 +0200
How can we help, cooperate?

The idea
The fundamental idea behind this site is to produce a loudspeaker database. The best database. It took years to get to a decent level, and quite an effort to maintain after that. We hope this site will be attractive to audio pros, producers, software developers and DIY:ers alike.

Loudspeaker producers
Displaying your information here exposes it to a large number of visitors, actively seeking loudspeaker information.
The service is free of charge. Now and in the future.

We also re-distribute data to audio and loudspeaker software

Thiele-Small Database Statistics

Wed, 01 Sep 2010 01:07:00 +0200
At the moment, these are static data. In the near future they will be live statistics.

Number of models in the database

By type

By use

Auxiliary power, an overview

Wed, 01 Sep 2010 00:29:00 +0200
When working with power amplifiers, we almost always need also some low voltage, low current power in addition to the main power supply. That is what this article is about.
(again, +/- xxV means +...V and -...V (pos. + neg. voltage))

The auxiliary power for an audio system is typically below 20V volts and up to a few hundred mA current. Some examples are:
ICs running on 5V

3.3V is becoming more and more common for digital circuits

+/- 15V was and is common for audio op-amps for pre-amplifiers, active filters etc

Gate drive voltage for power mosfets "VN10", typically 10 Volts above the negative rail and

Audio Building, Loudspeaker Sites

Tue, 24 Aug 2010 03:31:00 +0200

About Loudspeakers
Bassreflex German page with loudspeaker data. Nice but not quite up to date.
In-Wall Speakers

Parallelling Outputs

Sat, 14 Aug 2010 15:19:00 +0200
Originally written for the AMP-9x, but also useable on AMP-3x, 6x

From Tripath-datasheet:
"The outputs of the TAA4100A can be paralleled to increase the current capability as compared to a single output. Each output must still have its own inductor. Thus, the device output pins cannot be directly connected.
All 4 channels can be paralleled (after the inductors) or a pair of channels could be paralleled, for example CH1 and CH2 while using CH3 and CH4 a single bridged channels.
To parallel, simply connect OUTxP to OUTyP of an adjacent channel, and OUTxN to OUTyN of an adjacent channel. Again, this connection needs to be after the output inductors (10uH in most cases). Paralleling

Some AMP-15-PS pics during a build

Sat, 14 Aug 2010 10:58:00 +0200
Some close-up pictures by user Vbro, clarifying details.

Start with aligning the devices with the hole where the bolt is going and have a good look at where each pin should be bent to nicely fit into the holes.

Then use some fine tipped pliers to bend the pins.

Bridging the TA2022

Sat, 14 Aug 2010 10:05:00 +0200
The TA2022 can be bridged.

Switching from Half-Bridge to Full-bridge mode for MAX MONO POWER.

"By returning the signal from OAOUT1 to the input resistor at INV2 (pin 22-26). OUT1 will then be a gained version of OAOUT1, and OUT2 will be a gained and inverted version of OAOUT1 (see figure).

When the two amplifier outputs are bridged, the apparent load impedance seen by each output is halved, so the minimum recommended impedance for bridged operation is 8Ω.

Use only
- input 1,
- and LS left+right PLUS side (not PGND)"

(TA2022 in stereo

Some AMP-9Basic pics during a build

Sat, 14 Aug 2010 09:31:00 +0200
Just some close-ups of a build, to help you along.

Close-up of diodes. Note as from june 2010, smaller diodes are supplied. The smaller diodes are simpler to mount and solder than the ones shown on these photos.

The diodes on bottom.

Tripath-chip side. There is not much space between diodes and chip. It is convenient to solder

41Hz Audio

Copyrights

Testimonials

For Loudspeaker Manufacturers and Software Developers

Thiele-Small Database Statistics

Number of models in the database

By type

By use

Auxiliary power, an overview

Audio Building, Loudspeaker Sites

Parallelling Outputs

Some AMP-15-PS pics during a build

Bridging the TA2022

Some AMP-9Basic pics during a build