Bluetake i-PHONO Plus BT420Rx-C Bluetooth Headset
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Bluetake, the manufacturer of products that utilize the Bluetooth wireless technology, continue to push the envelope of quality consumer products. One of the latest products on this list, the Bluetake i-PHONO Plus (BT420Rx), is in our hands today and we’ll be putting it through its paces.

A few years ago, I enjoyed listening to my CD player at work. While this was enjoyable and productive, it was also a real pain due to the wires connected to my headphones. I was always hitting the cord with my elbow, and pulling my cd player off the desk. I tried putting the CD player in a drawer, and just managed pulling the wires right out of my headphones. So I went to the store and bought myself some wireless headphones. While these things worked okay, they were huge and clunky, and I always felt self-conscious when I wore them. When some of the guys began calling me “Leia,” I stopped wearing them all-together and went back to the wired headphones. I would have given anything for some quality lower-profile wireless headphones, but there just were none available then.
As many of you know, headsets based on Bluetooth technology have been available for awhile now. You can't walk through a store, nowadays, without running into someone with a flashing contraption on their ear, who is just walking around and talking to the sky. The whole idea of Bluetooth technology begs for the innovation of wireless headphones. But why hasn’t that been so?
Traditionally, the sound quality of music on a Bluetooth headset left much to be desired. This is due to the fact that Bluetooth, by default, does not support a high enough bit-rate for quality audio. You usually ended up listening to something with the quality of an old radio. I, myself, am a bit of an audiophile and I just cannot stomach listening to such things.

The new i-PHONO Plus is the next incarnation of stereo-capable headphones from Bluetake. They use the AD2P Standard (Advanced Audio Distribution Profile). AD2P allows support of Stereo music, and a sufficient bitrate for CD Quality music. What this means is no more crackly radio for Bluetooth headsets. Headsets supporting this technology have only been around for a little over a year now, which still makes this a somewhat new market.
Specs
UNIT | Dimensions folded: 100 x 88 x 77 mm (3.94 x 3.46 x 3.03 in.)(Neck-back Band Included) Dimensions extended: 150 x 140 x 75 mm (5.91 x 5.51 x 2.95 in.)(Neck-back Band Included) Weight: 98 g (3.46 oz.)(Battery Included) Built-in Speaker: Ř 30 mm (1.18 in.)(Diameter) |
SOUND | Frequency Response: 20 Hz – 20 KHz Sample Rate: 48 KHz, 16 Bit SPL (Sound Pressure Level): 100 dB @ 1 KHz THD (Total Harmonic Distortion): 0.1 % SNR (Signal to Noise Ratio): 80 dB |
BLUETOOTH | Specification: Bluetooth v1.2 compliant Bluetooth Profile Supported: A2DP (Advanced Audio Distribution Profile) AVRCP (Audio Video Remote Control Profile) HSP (Headset Profile) HFP (Hands-free Profile) Fixed PIN Code: 0000 (a sequence of four zeros) Connection Switching: Between 1 Player and 1 Phone*2 Audio Codec: SBC |
RADIO | Carrier Frequency: 2.4 - 2.484 GHz Spread Spectrum: FHSS (Frequency Hopping Spread Spectrum) Modulation Method: GFSK (Gaussian Frequency Shift Keying) Radio Coverage: Class 2, up to 5–10 m (15–30 ft.) *3 Sensitivity: <= 0.1% BER @ -80 dBm RF Output Power: -6 dBm to 4 dBm |
POWER | Power Consumption: 240 mW Power Input: 5 V / 250 mA Built-in Battery: 3.7 V / 550 mAh / Li-Polymer / Rechargeable |
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