A PreSonus firepod, also known as the FP10, is an electronic recording system. It is equipped with microphone amplifiers and a 48-track recording software.
My guess is an audio interface. I recommend the PreSonus Firepod Interface. It has 8 inputs, each with a volume control, a headphone volume control, a main audio out volume control, and it's only $400, you won't find an interface that good for any cheaper. Also, get some good mics. Just sayin'. For vocals and guitars, Audio Technica at2020.
The Presonus EQ3B has a high pass rumble filter which offers amazing sounds that are feature through the speakers of the sound.
There is not a stand alone iPhone mixing app. However, Presonus Audio Electronics has a QMix app that allows you to control monitor mixes of your Presonus Studiolive mixer.
The company PreSonus sells audio equipment such as recording systems, mixers, preamplifiers and software. They supply products to the music recording and production industries.
Interfaces don't contribute to sound quality, for that you need to worry about a good mic. For a good cheap interface, since PreSonus's $400 Firepod is good, maybe try their AudioBox or Firestudio Mobile? Or maybe an M-Audio Fast Track.
Instal the Mac CoreAudio drivers from the CD that came with the Presonus, or better yet, download the latest drivers from Presonus directly. Inside GarageBand, go to Preferences, and choose the Firestudio for the audio input and output. In Logic Studio, choose, Preferences -> Audio and choose the Firestudio for Recording and Playback.
Someone can buy a Presonus FireStudio from a number of companies such as Amazon. Amazon has a large selection of software from many different companies and also offers free shipping on orders that are $25 or greater.
Presonus Firebox is a portable recording system which still maintains a solid level of sound quality. Its strengths include its portability, and the accompanying Cubase 48-track recording software.
Presonus audiobox USB 2x2 real good for budgget.
A computer with Firewire, microphones and musicians.
There are a few companies that make the powered speakers. Some of these would include Yamaha, Prosound, as well as QSC. More information can be found on the website PreSonus.
To listen to a karaoke file while recording in PreSonus Studio One, first, import the karaoke track into a new audio track. Ensure your microphone is set up on a separate track for recording. Enable monitoring on the recording track by clicking the "Monitor" button, which allows you to hear both the karaoke track and your voice simultaneously through your headphones. Adjust the levels as needed to ensure a balanced mix.