Jump to content
Sony Insider Forums
bland10000

Sharp 4-pole 'phones

Rate this topic

Recommended Posts

The difference between plug-ins of the 3-pole and 4-pole design

3-pole on left (two black loops) 4-pole on right (three black loops)

3-pole.jpg4-pole.jpg

The available 4-pole phones; all made by Sharp

Earbuds

HP-SS30-S (silver) retail price in Japan, 2,200 yen.

hp-ss30.jpg

SS-30 stats:

Drive diameter, 14.5mm

Impedance, 32 ohms

Max.allowed output, 10mW

Sensitivity, 97dB/mW

Frequency response, 20~20,000Hz

HP-SM30-S (silver) retail price in Japan, 2,200 yen.

hp-sm30-s.jpg

SM-30 stats:

Drive diameter, 16mm

Impedance, 32 ohms

Max. allowed output, 10mW

Sensitivity, 95dB/mW

Frequency response, 20~20,000Hz

HP-SS30 (right) next to HP-SM30 (left)

hp-ss30-s_and_hp-sm30-s.jpg

Clip-on

HP-MD1-S (silver) retail price in Japan, 2900 yen.

Sharp_silver_hp-md1.jpg

HP-MD2-P (pink) retail price in Japan, 2900 yen.

Sharp_pink_hp-md2.jpg

HP-MD2-A (blue) retail price in Japan, 2900 yen.

Sharp_blue_hp-md2.jpg

all 3 (silver, pink, and blue)

Sharp_all_three_over_earphones.jpg

MD-1 & MD-2 stats:

Drive diameter, 30mm

Impedance, 32 ohms

Max. allowed output, 20 mW

Sensitivity, 105dB/mW

Frequency response, 20~20,000Hz

HP-MD5-S (silver) retail price in Japan, 5000 yen.

Sharp_hp-md5.jpg

MD-5 stats:

Drive diameter, 30mm

Impedance, 32 ohms

Max. allowed output, 50mW

Sensitivity, 102dB/mW

Frequency response, 20~20,000Hz

inner ear

HP-MD33-S (silver) retail price in Japan, 3500 yen.

Sharp_hp-md33.jpg

HP-MD33 stats:

Drive diameter, 9mm

Impedance, 32ohms

Max. allowed output, 20mW

Sensitivity, 120dB/mW

Frequency response, 20~20,000Hz

hanger

HP-MD90-S (silver) retail price in Japan, 12,500 yen.

Sharp_hp-md90.jpg

HP-MD90 stats

Drive diameter, 16mm

Impedance, 32ohms

Max. allowed output, 20mW

Sensitivity, 95dB/mW

Frequency response, 20~20,000Hz

All 4-pole 'phones come with a 3-pole to 4-pole converter chord; without it, plugging 4-pole phones into a 3-pole socket will only provide a signal to the left channel.

User experience:

SS30 & SM30: These are stock buds that are available at the retail level. They get the job done.

MD1 & 2: The 1's & 2's have a clean detailed sound. They are louder than the 5's when compared at

equal volumes. I would use them more but the plastic ear-hangers do not keep the 'phones in

place when I walk. During the cold weather, it is not a problem because I wear a stocking

cap over them that keeps them in place.

MD5: This set is more expensive than the 1's & 2's but I think it is for the housing quality rather than the

speaker quality. The rubber-coated metal hangers do hold the 'phones in place better than the

plastic hangers of the 1's & 2's but the sound is not as loud. I do hear the same amount of detail

in the 5's as I do the 1's & 2's but I have to turn the volume higher to match the sound level.

MD33: A very clean and detailed sound; these are the best sounding of the available 4 pole 'phones.

It has taken me several months to become accustomed to wearing inner-ear phones and I

only use them for riding planes and trains; at home I use 66 eggos. I find they aren't good for

walking because they can block out too much outside noise and they are prone to losing their

seal from the vibrations of body motion, whether it be walking or turning my head.

MD90: A strong sound and as detailed as you can expect from earbuds. These are my favorite buds of

any 3 or 4 pole buds I own and I use them with both 3 and 4 pole units. They are lightweight,

they sound good, and the ear hangers keep the buds in place.

Edited by bland10000

Share this post


Link to post
Share on other sites

Very nice review and pix. I miss my old Sharp DR7. but that 4 pole headphone sure played havoc with my FM modulator in the car. It just wouldn't behave like the Sony MDs with the 3 pole connections. Still, when going headphone out to PC or deck, that Auvi 1 Bit 4 pole connection was tops!

Thanks again for the pictures and review. good.gif

Share this post


Link to post
Share on other sites

I can't say enough great things about the Sure MD33s... I've converted 3 other people so far. I've had professional head sets in the hundred dollar + range, and I love these better. Amazing in sound, comfort, and portability (and price!)

IPB Image

Share this post


Link to post
Share on other sites

What extra signal are they transmitting with the extra pole?

That sounds like an invitation for some NSA jokes... :lol:

According to two different sources, one I've linked 'cause I could find it, the 4-pole has to do with 1) saving energy and 2) presenting a cleaner stereo signal; less bleeding of signal between left and right channel. At home I'll listen to auvi units with 66eggos and I find it just as satisfying as using 4-poles but 66's are a great 'phone so I'm not surprised. Perhaps the difference would be more noticeable with lower-end 'phones.

Share this post


Link to post
Share on other sites

I vote for this thread to be stickied - it's essential for anyone with or considering purchasing Sharp portables.

done then

Share this post


Link to post
Share on other sites

There are rumours about the loss of quality when using 3 pole headphones on auvi units.

Worse quality than standard 3 poles from other brands. Is that true ?

It means you must use a 4 pole headphones. :huh:

Share this post


Link to post
Share on other sites

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now


×