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Jumping in with my reply since I saw @fnkcow mentioned about this in another thread
Joe is definitely onto something. In my experience with a number of BT audio reviews, including pre-BT4.0 and with BT4.x, I definitely noticed a sound improvement with devices supporting apt-X codec which suppose to expand bandwidth compression. Soon to be available, apt-X Low Latency will also resolve issues with audio/video syncing as well. Does BTS supports 4.0 w/apt-X? If it doesn't, low end will be affected. Of course, can't speak for iDevices (they don't support apt-X codec), since I'm 100% android vested
Specs are here:
TECHNICAL SPECIFICATION
- Bluetooth 4.0 with aptX and Apple lossless support (CSR 8645)
- Supported Bluetooth profiles: HFP1.6 (HD Voice ready), A2DP1.2 and AVRCP1.4
- Dimensions (L x W x H): 14.5 mm x 14.5 mm x 60 mm
- Weight: 10 grams (approximately 0.36 oz)
- Range: Up to 10 meters (approximately 33 feet)
- Micro-USB B (5-pin)
- Output Impedance: less than 1 ohm
http://nobleaudio.com/en/shop/wireless/
how about the cable, are you using the one bundled with BTS or original A12? Does that make any difference?