General Discussion General discussion forum for all drum related topics. Use this forum to exchange ideas and information with your fellow drummers.

Thread Tools Search this Thread
Old 08-14-2011, 09:50 PM
bocal bocal is offline
Junior Member
Join Date: Aug 2011
Posts: 2
Default Headphone Isolation question

I can't seem to find an answer to my question. I have searched the internet, called Sweet Water, the Guitar Center, Pearl cooperation of America, and Beyerdynamic corporation as well as posted this question on the pearl forum. All I have gotten so far is referred to another source.

I am hoping someone on drummerworld may know or have some personal experience with the Pearl PDM-250 headphone.


Back to the problem.

I have cross referenced the spec and other details of the Pearl PDM-250 with the Beyerdynamic 770 Pro. They appear to be the same headphone. They even weigh the same.

The one difference is Pearl PDM-250 claims 35db isolation and Beyer 777 Pro claims 18 db isolation. Now the Beyer 770m for drummers claims 35 db isolation, but the Pearl PDM-250 is more like the 770 Pro than the 770m.

The Pearl PDM-250 and 770Pro both have the same ear pads and bass reflex openings, which reportedly sacrifices db isolation while adding better sound quality. The Beyer 770m for drummers has a different ear pad and lacks bass reflex to achieve better isolation but sacrifices sound quality.

Can there be a 17 db difference between the Pearl PDM-250 at 35db isolation and the 770 Pro at 18 db isolation when they appear to be the same headphone?

I was all set to buy the Pearl PDM-250 when I noticed the 17 db discrepancy. Sound isolation is important for my purpose but getting better sound quality is a bonus. If I cannot get this puzzle solved, i will just buy the 770m, but I like the features of the Pearl PDM-250 better, but I am not willing the sacrifice the isolation.

Reply With Quote
Old 08-14-2011, 10:10 PM
Posts: n/a
Default Re: Headphone Isolation question

One reason for the discrepancy could be Pearl's figures. Beyerdynamic tend to give an average -dB reduction across the whole range (20Hz-20KhZ). Pearl might be quoting the maximum -dB reduction at one specified frequency.
Reply With Quote
Old 08-14-2011, 10:45 PM
Bo Eder's Avatar
Bo Eder Bo Eder is offline
Platinum Member
Join Date: Jun 2010
Location: Southern California
Posts: 13,843
Default Re: Headphone Isolation question

Why don't you check out these:


These are the GK Ultraphones developed by Gordy Knudtsen, who's a professional drummer too. I love these things. He takes the Peltor shooter's earphones, and installs the Sony MDR-7506 drivers in them. I can actually mix a band from behind them wearing these earphones. These are awesome.
Reply With Quote
Old 08-15-2011, 02:56 AM
bermuda's Avatar
bermuda bermuda is offline
Drummerworld Pro Drummer - Administrator
Join Date: Apr 2006
Location: Los Angeles
Posts: 9,106
Default Re: Headphone Isolation question

+1 on the UltraPhones, I've used them exclusively on stage and the studio for years.

Reply With Quote

Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are Off
[IMG] code is On
HTML code is Off

All times are GMT +2. The time now is 05:29 AM.

Powered by vBulletin® Version 3.8.0
Copyright ©2000 - 2019, Jelsoft Enterprises Ltd.
Bernhard Castiglioni's DRUMMERWORLD.com