Antoine Malnati

I remembered the topic and found it using the keywords fusion and screen in the forum's search function.

Hi Tyler, Take a look at Glenn's post (the 5th one) in this topic : http://jwsoundgroup.net/index.php/topic/7005-zaxcom-fusion-boots-up-with-blank-screen-help-needed Hope this helps. Antoine

Hi Jeff, LifePO4 batteries have at best an energy density of 120Wh/kg. This Shorai battery seems to have an energy density > 200Wh/kg which is only possible with li-ion batteries. Shorai uses a strange capacity rating for their batteries : "PBeq AHr" = SLA equivalent Ah. It seems to be some marketing trick to compare the battery's capacity to a standard SLA battery. Here is the explanation found on this page : http://www.cyclebuy.com/shopping/shorai/faq.htm Q. How does the LFX "PBeq AHr" capacity rating compare to lead-acid Ahr ratings? A. First, we need to understand that the primary job of a starter battery is to flow a large current (amperage) for a short time, in order to start a vehicle. In order to do that efficiently, the battery must have low internal resistance. Holding all other considerations equal, the larger the battery is in capacity the lower the resistance, and the better able it is to crank a vehicle under high loads. Lead-acid makers have therefore used AHr(capacity) ratings as shorthand to indicate cranking ability, rather than a real usable capacity. The lead-acid capacity rating itself is based on a complete discharge at a low discharge rate. Under actual cranking conditions they will deliver up to 30% less than spec capacity. And because lead-acid batteries begin sulfating when only a small percentage of the capacity has been used, and their internal resistance rises as they are discharged, the actual capacity which can be USED is often 20% or less of the mfg. rating. Discharge in excess will not only damage the lead-acid battery, it may not allow proper starting as voltage sags. Shorai LFX are based on a completely different chemistry. Not only do they have less than 1/3 the internal resistance per capacity than do lead-acid, they are also the ultimate "deep-cycle" battery. The internal "completely discharged" capacity of a Shorai LFX is 1/3 the rated "PBeq" capacity. For example, the LFX18 12V series have 6Ah cells internally. But the cells are capable of 90% discharge without damage and while retaining more cranking ability, compared to roughly 30% for lead-acid. As such, the USABLE capacity(or "reserve capacity") of an LFX18 12V battery is on or near par with 18AHr-rated lead acid batteries, while providing superior cranking performance and a vast reduction in weight. The Shorai PBeq AHr (lead-acid equivalent) rating system therefore allows users to compare a very different technology from lead-acid, but on a close apples-to-apples basis when making a choice. In other words the battery you have has a true rating of 6Ah. That's roughly 76Wh (12.8V x 6Ah) which is barely more than a good NP1 li-ion battery. Looking forward hearing how this battery performs. Antoine

We did try with antoher battery source (a 9v battery) but it didn't help. We tried to add some filters in the cable connectors without any luck...

RF modulation is picked up by the cable like any other microphone. The CMR just doesn't handle it correctly when entering the preamp. The new CMC6 preamp design (the one with the gold plated metal protection in the XLR insert) has been specially designed to achieve excellent RFI protection. The CMR is an asymetrical design and is very sensitive to digital modulation, even if it is 2 meters away from the transmitter ( as it's cable acts as an antenna). The CMR is not sensitive to FM modulation, only to digital modulation.

EMC means Electro Magnetic Compatibility. The analog circuitry of the CMR demodulates the digital RF modulation and generates noise (and lots of it). This is exactly the same problem we used to have with the COS-11 before Sanken proposed the COS-11d which is Zaxcom compatible. As the french distributor for Schoeps and Zaxcom we tried the CMR on Zaxcom a long time ago : it's just a no go.

The Schoeps CMR is not compatible with Zaxcom TXs for EMC reasons. I worked several months on building a phantom power supply compatible with the TRX900 : http://www.areitec.fr/areitec-pico48-phantom-power-adaptor-zaxcom-wireless-produit-395.html . The combination of a Zaxcom TRX900 and Pico48 outperforms an Audio ltd + Vdb L48 ("magic cable") regarding sound quality without any doubt. The 3V output on the lemo connector is current limited ; this is why the Pico48 uses a 9v battery to generate 48V. This helps saving power on the TRX900 too.

Pretty-- but even on my little rig I need more than 4 taps unless I use Ys. Another model with 6 or 8 outputs is planned. A prototype with 12 outputs was built for a sound cart. This should also give birth to another model... I can't tell for sure, but those look like they might be latching switches, they type you need to pull up on to change the position. If so, accidentally bumping them is not a big issue. John is right about that ... I'll agree with everything Derek said except for the Hirose. I'm not a fan. I especially don't agree with your proprietary power. Put a connector on your box for the DC in and let your customers decide how they want to power it. Other than that, nice box. Our battery and fuel gauge system is actually a smart battery system. Each battery embeds a micro-controller that monitors the SoC (state of charge) and SoH (state of health) of the battery. Some large camera batteries use this technology but you will mainly find it on all laptop batteries. There are many NP style batteries and power distribution boxes out there. Our system is very different, but that is what we are looking for ... You can plug any battery to our power distribution system, but the fuel gauge will stay quiet because it won't have any micro-controller to communicate with ... The eSMART BG-D will also be available with Hirose connectors. I also find these connectors great but they are really expensive. All our cables should also be available with Hirose connectors to ensure compatibility. Antoine

Hello everyone and best wishes for 2010 ! Here is a new power distribution box for sound bags : http://www.audioroot.fr/audioroot-esmart-bg-d-power-adaptor-with-smart-fuel-gauge-product-15.html It connects to our 37Wh, 75Wh and soon 95Wh smart lithium batteries and provides 4 protected DC outputs. A small OLED screen displays all battery information and predicts the remaining run time. Connectors are Switchcraft locking type and switchable 2 by 2 with 2 locking switches.

Hi Matthias. The AES output feature is an Areitec modification we can do in house. This is not an option you can ask for when ordering an RX 900. It works quite well and doesn't increase power consumption in a significant way. Sounds better too :-) Antoine