12 inputs, 12 outputs, 8 microphone/line input channels

See http://andrew.triumf.ca/AG/vortex/ for some very useful configuration advice.

The bigger version to the Chat 50. It has three built-in microphones for full 360-degree pickup, compared to the Chat 50’s single microphone. It also features a larger speaker, which produces more volume. It can deliver microphone and speaker coverage up to 8-12 feet away (depending on room conditions), which would accommodate groups up to 8-10 people.

It's easy to use and works perfectly under Windows XP & MacOSX

Tested on Ubuntu 7.10 and it works good. However there is a slight hiss sound when sending, but that could just be due to audio settings. Need to investigate further.

Easy to use USB echo cancellation device. Works perfectly under Windows XP & MacOSX

Tested on Ubuntu 7.10 and it works good. However there is a slight hiss sound when sending, but that could just be due to audio settings. Need to investigate further.

USB, small footprint, desktop, good quality echo cancellation, relatively cheap ($129US).

PCI card that offers echo cancellation of a microphone source (or mixer output) referenced to PC sound card output. The card seems only to take power from PCI bus and so does not put any processing demands on the PC. It comes with cables to connect it to the PC sound card (a pre-requisite); installation is very simple and requires no drivers or software, again reducing the complexity of the system.

I have tested this card in one of our nodes and neither local nor remote sites noticed any audible difference from that produced by our standard setup.

- Designed for suspension over choirs, instrumental groups and theater stages
- Superior off-axis rejection for maximum gain before feedback
- UniGuard™ RFI-shielding technology offers outstanding rejection of radio frequency interference (RFI)
- UniSteep® filter provides a steep low-frequency attenuation to improve sound pickup without affecting voice quality
- Accepts interchangeable elements to permit angle of acceptance from 90° to 360°
- Low-profile design with low-reflectance finish for minimum visibility
- Available in two colors: black (U853A) and white (U853AW)

- Designed primarily for surface-mount applications in broadcast, professional recording and sound reinforcement
- Closely-matched optimally-positioned elements deliver the spatial impact and realism of a live sound field
- Heavy die-cast case and rubber bottom pad minimize coupling of surface vibration to the microphone
- Switchable low-frequency roll-off
- Low-profile design for minimum visibility
- 25' (7.6 m) detachable cable (TA5F to two 3-pin XLRM-type connectors)

- Bluetooth version 1.1 specifications
- Bluetooth headset and hands-free profiles
- Up to 33 feet Operating range
- Up to 7h (Depends on usage) Talktime
- Uni-directional Mic
- Charging time: 2 hours

- Folds for easy storage and transport
- USB plug play – no sound card required
- Noise canceling microphone
- QuickAdjust™ microphone boom
- Inline digital volume and mute controls
- PerSono™ Audio Control Center Software