Hi

I'm planning on using the above combo and need some advice from people that own it or are very familiar with the above.

All my music is on cd and I will use the format applelossless.

On a scale of 1-10(Loudest) I would normally listen to my music at about 4 turning it up to 7 once in awhile.

The phones are the Westone Um-3x.>>>>

Headphones Details:

• Sensitivity: 124dB/mW, Frequency response: 20 Hz -18 kHz,, Impedance: 56 ohms
• Driver: Three balanced armature drivers with a passive three-way crossover.
• Soft padded pouch, replaceable Comply TM foam tips, and wax loop for cleaning. ( Foam Tips comes in Small, Medium and large sizes )
• The UM3X is ultimate universal-fit musicians' monitor, perfect for the on-stage performer.
• Equipped with a durable 50" stereo "Y" cord with a 3.5mm stereo jack

These headphones are very efficent and easy to drive so i should not have a problem with the above volume?

Using the ipod touch 64g>>

Technical Details

• Dimensions: 4.3 x 2.4 x 0.33 inches (110 x 61.8 x 8.5 mm)
• Weight: 4.05 ounces (115 grams)
• Capacity: 64 GB
• Wireless standards: Wi-Fi (802.11b/g); Nike + iPod support built in; Maps location-based service; Bluetooth 2.1 + EDR
• Display: 3.5-inch (diagonal) widescreen Multi-Touch display
• Display resolution: 480-by-320-pixel resolution at 163 pixels per inch
• Frequency response: 20Hz to 20,000Hz
• Audio formats supported: AAC (8 to 320 Kbps), Protected AAC (from iTunes Store), MP3 (8 to 320 Kbps), MP3 VBR, Audible (formats 2, 3, and 4), Apple Lossless, AIFF, and WAV
• Earphone frequency response: 20Hz to 20,000Hz
• Earphone impedance: 32 ohms
• Video formats supported: H.264 video, up to 1.5 Mbps, 640 by 480 pixels, 30 frames per second, Low-Complexity version of the H.264 Baseline Profile with AAC-LC audio up to 160 Kbps, 48kHz, stereo audio in .m4v, .mp4, and .mov file formats; H.264 video, up to 2.5 Mbps, 640 by 480 pixels, 30 frames per second, Baseline Profile up to Level 3.0 with AAC-LC audio up to 160 Kbps, 48kHz, stereo audio in .m4v, .mp4, and .mov file formats; MPEG-4 video, up to 2.5 Mbps, 640 by 480 pixels, 30 frames per second, Simple Profile with AAC-LC audio up to 160 Kbps, 48kHz, stereo audio in .m4v, .mp4, and .mov file formats

Based on the above info do I really need the Headstage Arrow 12HE Headphone Amplifier if so WHY?

Thanks for all your help

GJ