SONIC has the best prices, and fast shipping. This was my second purchase. This time I got new Front & Rear speakers for my truck. I installed them the day they arrived and they sound great. No need to ever go anywhere else looking for equiptment.
The HP-1 has a powerful 1650mAh on-board backup battery which can nearly double the battery life of the iPhone 4/4S. The unique Smart Battery Protection circuit continuously monitors and optimizes the power performance of your iPhone, and an independent LED indicator keeps you informed of the remaining life of the secondary battery. The new "auto shut-off" feature will help preserve your battery life by switching off once the iPhone is fully charged.
Headphone Amplifier & Splitter
The i.Fuzen HP-1 allows you to share your music with a friend by splitting the single headphone jack into two. The proprietary J-FET OP-AMP amplifier is powerful enough to drive two pairs of standard headphones or one pair of professional monitoring headphones while maintaining vacuum tube quality sound, making the HP-1 the ideal choice for audiophiles and music lovers alike. The new and improved amplifier will allow you to enjoy the headphone amplifier while your iPhone charges.
Unrestricted iTunes Sync
With full USB pass through capability, this case will allow you to sync flawlessly with iTunes without the need to remove the iPhone. The mini USB input also increases your options if you are in need of an emergency charge, but do not have access to a dock connector cable.
Innovative Design
The i.Fuzen HP-1 takes advantage of the features and style of the iPhone 4/4S. The relatively sleek case accentuates the iPhone's distinctive lines while minimizing the increase in overall size. The HP-1 is available in white and black, allowing you to easily match the case to your iPhone.
Cell Phone Case Features:
Proprietary Auzentech Headphone Amplifier
Dual Headphone Output port to share your listening with your friends
ZX-Driver provides Ultra-Low Distortion and Max 180mW output power
J-FET OP-AMP to provide Vacuum Tube like sound output
Proprietary Auzentech Balanced Power Supply
Sound Mode, Selector button & Status Indicator
Touch panel volume control
Unique & compact design to match your iPhone 4 look
Impressive 1650mAH Li-Polymer battery with Smart protection circuit
Improved Sharp Version adds innovative features
Unlimited headphone amp usage while your iPhone is charging
Headphone amp will not charge iPhone while in use for extended usage
Automatically shuts off once iPhone is fully charged to extend battery reserve power
4-Steps LED battery life meter and battery life check button
Charge via USB port (from desktop PC or Laptop) with supplied USB cable
I purchased two of these units, one as a present and have used the unit with the Real Voice Spider ear buds. I made sure to follow the instructions regarding first time charging and had no problems from the first connection on.
I first connect the Real Voice Spiders directly to the output of my iphone 4S and listened to several selections, primarily Jazz, classic rock and blues. All recordings were at least 256 bit and i set the all parametric values to flat. The sound from the iphone 4s output jack was average at best (apple should really be ashamed) even with the Real Voice Spiders which are a substantial (understatement) improvement from the earbuds supplied by apple. I then plugged in the iFuzen (no break in) and connected the Spiders to the Low output side (there is also a hi for difficult to drive headphones such as my HD800s).
The sound improvement with the iFuzen/Spiders was DRAMATICALLY better in every way. I then connected my HD 800s to the hi side of the iFuzen and again listened to the same selections, incredible. The iFuzen/HD800 combination (on these 256bit songs) was so close to my dedicated head phone amp (Audio GD NFB 10WM) it was almost impossible to tell the difference. The iFuzen had a little more bloom (tube warmth if you will) and a slight emphasis in the mid to low bass register (quite pleasant and relaxing actually) and the Audio Gd had a higher level of resolution but these are all insignificant and quite frankly, the iFuzen is easier to listen to with lower resolution media.
The iFuzen has a sound shaping feature witch allows the user to select between 4 different effects. They did have an effect on the sound but i prefer my music as recorded so i have not explored it other than to run through all the selections once or twice per song to test it.
I have read some complaints about the volume control on the iFuzen but at least i have not had any problems with it (it appears as though some had not read the manual).
Things to watch for:
1 when you plug the iFuzen into your mac (or whatever) with the supplied cable it turns the unit on. Once charged or synced and the cable removed, the unit must be turned off manually or it will drain to the iphone until empty. I have never had any problems syncing with my mac once iTunes is started.
2 when plugged in to the mac, it doesn't always fire iTunes off (if you have iTunes set that way) but it does always start charging.
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It's a great case/battery for the iPhone. It doesn't provide any protection for the iPhone screen and it does add some weight to the phone. But, I've attached the "Rivet clip system" to it so that I can attach it to my belt or belt loop. Pair the iPhone. iFuzen and the noise canceling Bose headphone and you get a terrific sound with double the play time, and the option of a second set of headphones or earbuds for your travelling partner.
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Really useful case for those days out with the family and your not going to be able to charge the phone. Other cases cost way more and don't give the hours of life this case can. This case, it's a must buy.
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