Preamp for Flightcom 403mc music input from iPad

So it appears from searches on this site that others have determined that playing music off your iPad there is an issue getting enough volume due to the lack of a preamp in the intercom box. I have found the same; iPad 3 not enough volume where as iPhone 5 no problem.

Has anyone sourced a nice little board that essentially you put power to and music lines through?

Try an App first

There are apps that can boost volume.

As far as a box to do the job.
I've used this for other applications. It's nicely made and quiet. Just have to mod up a 12v adapter plug.

http://www.mcmelectronics.com/product/MCM-CUSTOM-AUDIO-50-14820-/50-14820

IPAD Music

I don't know about the Flightcom 403 but I recently installed a Garmin GTR 200 radio that has a built in intercom with a music input you can wire into the rear harness. I ran the music input wire to a side panel and connect it to the IPAD Mini with a standard cable with 3.5mm male jacks on both ends. I have to enable the music with a button on the radio then select the music from the IPAD and it plays through the intercom.

As you know, the IPAD also has Bluetooth so if you have Bluetooth enabled headsets you don't need any wires. I only have one Bluetooth headset (AKG AV100) so if I have a passenger we use the cable from the mini to listen to music.

Sound clarity and volume is excellent in either mode with no external amps of any kind.

Oly

Mixer: http://store.makerplane.org/5-channel-stereo-audio-mixer-amx-4a-4b/
Music amp: http://store.makerplane.org/stereo-music-audio-headphone-amplifier-asx-2a/

Both are for aircraft use, very compact and solve the problem.

An audio transformer should fix you up. 8 ohm side to the iPad, 1k ohm side to the 403 input (600 ohm).
If you still have one of these in your neighborhood!
http://comingsoon.radioshack.com/radioshack-audio-output-transformer/2731380.html#.VZVl9K3bJaQ

Use two to mix the stereo output to mono.
http://www.vansairforce.com/community/showthread.php?t=16723