Mackie M48, 48V Phantom Power Supply (M48)

Since the sole purpose of this box is to provide phantom power (i.e. Charge the condenser plates on the microphone) but it won't add any gain to the system that isn't already there.

No, a shoe mount, microphone, or tripod stand are not available.

Obviously, you're referring to when the device is powered by a battery. It is unlimited in AC mode. br>br>I haven't had the opportunity to test mine on batteries for long enough to respond. I believe 10 hours at a rate of 10 mamp/hr is a reasonable estimate. The answer is dependent on the current draw of your microphone, and there are a variety of 9 V battery types with varying mamp/hr ratings, including the standard Zinc Carbon, akaline, and Lithim Zn Cadmium rechargeable. br>br>Snippet from the Wikimedia Commons: br>br>In primary carbon-based batteries, the nine-volt battery format is widely used. Zinc and alkaline chemistry, primary lithium iron disulfide, and nickel-based rechargeable batteries nickel, cadmium lithium-metal hydride and metal hydride ion. Mercury- Because of the mercury content, these types of oxide batteries haven't been produced in a long time. NEDA 1604 and IEC 6F22 (for zinc-carbon) and MN1604 6LR61 (for alkaline) are some of the designations for this format. Regardless of chemistry, the size is commonly referred to as PP3—a designation that was originally reserved only for carbon-based materials. zinc, or E or E- in some countries block. The majority of nine-volt alkaline batteries are made up of six separate 1. Wrapped LR61 cells with a voltage of 5 volts. These cells are slightly smaller than LR8D425 AAAA cells and, despite being three times the size, can be used in some devices in their place. Shorter by 5 mm. Carbon- Zinc types are made up of six flat cells stacked in a stack and sealed in a moisture-proof container. To avoid drying, use a water-resistant wrapper. Three cells in series are used to make primary lithium types. br>br>It's just a guess, but since phantom-powered microphones are analog electronic devices, they'll probably "work" over a wide range of voltages, so the decrement seen in some 9 Volt battery tyoes as they discharge won't stop the microphone from working. br>br>If you plan to run off battery continuously, a 9V rechargeable tyoe may be a good choice. In the past, I found that my investments in rechargeables were unjustified in the long run because I only used the devices sporadically, and the convenience of simply switching out a need for plain old cabon/zincs or alkalines from 99C only or Dollar Tree for only a dollar was too easy.

These are the ones I have. They work fine, though the battery cover is a little flimsy.