2010年11月18日 · ER4P-T is intended for sound engineers and audiophiles in constant motion and can be used with portable devices without an additional amplifier. Compared to the ER4S, the ER4P-T has 10dB greater output at high frequencies and 13dB greater output at low frequencies.

2011年2月8日 · After over 4 years on head-fi, I finally bought a pair of Etymotic IEMs - the ER4 P/S. I've auditioned the ER4p, HF2 and ER6i before and they all impressed me a lot, but for some reason I never actually bought a pair to spend my time with it and to analyze it properly.

2004年4月20日 · When you're ready for aural bliss, shell out the big bucks for the ER-4P or ER-4S. These ear-canal headphones have flanged ear tips that provide noise isolation. The ER-4S requires an amp;...

2010年8月7日 · In this review, we will be focus on ER4P and the resistor-adapter-transformed ER4S. As the story about IEM began, it was back in around the mid 80’s that a few rock stars began to invest into the development of IEMS (in-ear-monitor system) for their own hearing sake (with a few more advantages on the stage of course).

2010年8月8日 · The overall sound signature of ER4S is lighter and more felt more expended compared to 4P. Analytical and fairly bright but not harsh, extremely resolving and fast while remain very neutral, flat and cold across the whole frequency range.

ER•4P-T earphones can be used with portable devices without an additional amplifier--or converted to the ER•4S response with a P-to-S cable. Compared to the ER•4S the ER•4P-T has 10dB greater output at high frequencies and 13dB greater output at low frequencies.

The ER-4P (POWER) ear phones have a high sensitivity, low impedance, and a fantastic bass response, allowing you to use your CD, MD, or MP3 player without an additional amplifier.

2007年4月3日 · Most applicable to the iPod fans is the ER-4P, the version specifically designed for portable devices. Like the various offerings from Shure and Ultimate Ears, the ER-4Ps are …